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Commit Graph

58575 Commits

Author SHA1 Message Date
Guoqi Chen
39d3c4ad35 debug/elf,cmd/link: add additional relocations for loong64
The Linker Relaxation feature on Loong64 is already supported in binutils 2.41.
The intermediate code generated after enabling this feature introduces three
reloc types R_LARCH_B26, R_LARCH_ADD32 and R_LARCH_SUB32.

The other relocation types are not currently used when running all.bash, but
in order to avoid the host tool chain making the decision to use it we don't
have to catch it every time.

The LoongArch ABI at here:
https://github.com/loongson/la-abi-specs/blob/release/la-abi.adoc

Corresponding binutils implementation:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=be1ebb6710a8f707bd4b0eecbd00f4f4964050e5
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=1b6fccd28db14fffe75ff6755307047ef932c81e

Fixes #63725

Change-Id: I891115cfdbcf785ab494c881d5f9d1bf8748da8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/537615
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-02 19:46:03 +00:00
cui fliter
925a4d93dc errors: add available godoc link
Change-Id: Ie86493ebad3c3d7ea914754451985d7ee3e8e270
Reviewed-on: https://go-review.googlesource.com/c/go/+/535080
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: shuang cui <imcusg@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
2023-11-02 19:45:41 +00:00
Tobias Klauser
f31a030e90 runtime: remove unused getOSRev on openbsd
It's unused since CL 538458.

Change-Id: Ic8d30b0fb54f3f1d723626c5db56fbf4cf181dea
Reviewed-on: https://go-review.googlesource.com/c/go/+/539155
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-11-02 19:37:20 +00:00
Dmitri Shuralyov
2ffe600dfa cmd/go/internal/modfetch: avoid path.Join in URL errors, part 2
CL 406675 added more detail to bare errors from net/http in two places.
CL 461682 improved one of the two places to stop folding "//" into "/".
This CL applies the same change to the other place.

For #52727.

Change-Id: I3fc13f30cf0f054949ce78269c52b7fafd477e70
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/532015
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-02 19:15:05 +00:00
Jes Cok
4e9509303b cmd/compile/internal/syntax: use strings.TrimPrefix in typeOf
Change-Id: I38c2a1afa1684b069522cd1b74529ae10f019ce8
GitHub-Last-Rev: 8c726f1f01
GitHub-Pull-Request: golang/go#63894
Reviewed-on: https://go-review.googlesource.com/c/go/+/539057
Run-TryBot: qiulaidongfeng <2645477756@qq.com>
Run-TryBot: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-11-02 18:45:06 +00:00
Michael Pratt
a334c45273 os/signal: skip nohup tests on darwin builders
The new LUCI builders have a temporary limitation that breaks nohup.
Skip nohup tests there.

For #63875.

Cq-Include-Trybots: luci.golang.try:gotip-darwin-arm64_13
Change-Id: Ia9ffecea7310f84a21f6138d8f8cdfc5e1392307
Reviewed-on: https://go-review.googlesource.com/c/go/+/538698
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-11-02 17:31:41 +00:00
Michael Anthony Knyszek
cdf1362179 runtime: move userArenaHeapBitsSetType into mbitmap.go
This will make the upcoming GOEXPERIMENT easier to implement, since this
function relies on a lot of heap bitmap internals.

Change-Id: I2ab76e928e7bfd383dcdb5bfe72c9b23c2002a4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/537979
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-02 17:26:23 +00:00
Michael Anthony Knyszek
7a606fef66 runtime: split out pointer/scalar metadata from heapArena
We're going to want to fork this data in the near future for a
GOEXPERIMENT, so break it out now.

Change-Id: Ia7ded850bb693c443fe439c6b7279dcac638512c
Reviewed-on: https://go-review.googlesource.com/c/go/+/537978
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
2023-11-02 17:24:39 +00:00
Michael Anthony Knyszek
04575ce53f reflect: pass the right element type in verifyGCBitsSlice
Currently verifyGCBitsSlice creates a new array type to represent the
slice backing store, but passes the element type as the slice type in
this construction. This is incorrect, but the tests currently don't care
about it. They will in a follow-up CL, so fix it now.

Change-Id: I6ed8a9808ae78c624be316db1566376fa0e12758
Reviewed-on: https://go-review.googlesource.com/c/go/+/537981
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-02 17:24:08 +00:00
Russ Cox
607e020150 cmd/cgo: disable #cgo noescape/nocallback until Go 1.23
Go 1.21 and earlier do not understand this line, causing
"go mod vendor" of //go:build go1.22-tagged code that
uses this feature to fail.

The solution is to include the go/build change to skip over
the line in Go 1.22 (making "go mod vendor" from Go 1.22 onward
work with this change) and then wait to deploy the cgo change
until Go 1.23, at which point Go 1.21 and earlier will be unsupported.

For #56378.
Fixes #63293.

Change-Id: Ifa08b134eac5a6aa15d67dad0851f00e15e1e58b
Reviewed-on: https://go-review.googlesource.com/c/go/+/539235
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-11-02 16:43:23 +00:00
Michael Pratt
5622a4b205 os/signal: remove go t.Run from TestNohup
Since CL 226138, TestNohup has a bit of a strange construction: it wants
to run the "uncaught" subtests in parallel with each other, and the
"nohup" subtests in parallel with each other, but also needs join
between "uncaught" and "nohop" so it can Stop notifying for SIGHUP.

It achieves this by doing `go t.Run` with a WaitGroup rather than using
`t.Parallel` in the subtest (which would make `t.Run` return immediately).

However, this makes things more difficult to understand than necessary.
As noted on https://pkg.go.dev/testing#hdr-Subtests_and_Sub_benchmarks,
a second layer of subtest can be used to join parallel subtests.

Switch to this form, which makes the test simpler to follow
(particularly the cleanup that goes with "uncaught").

For #63799.

Change-Id: Ibfce0f439508a7cfca848c7ccfd136c9c453ad8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/538899
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-11-02 16:31:19 +00:00
Joel Sing
cfe36fd122 runtime: add crash stack support for riscv64
Change-Id: Ib89a71e20f9c6b86c97814c75cb427e9bd7075e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/538735
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
2023-11-02 14:10:56 +00:00
Robert Griesemer
285ac5a11e go/parser: better error messages for incorrect type parameter list
This is a port of CL 538856 from the syntax parser to go/parser.
As part of the port, make more portions of parseParameterList
matching the equivalent paramList method (from the syntax parser).
As a result, this now also produces a better error message in cases
where the missing piece might not be a type parameter name but a
constraint (this fixes a TODO in a test).

Improve comments in the code and adjust the corresponding comments
in the syntax parser.

Change references to issues to use the format go.dev/issue/ddddd.

For #60812.

Change-Id: Ia243bd78161ed8543d3dc5deb20ca4a215c5b1e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/538858
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
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2023-11-02 12:56:53 +00:00
Joel Sing
54452b963c syscall: call getfsstat via libc on openbsd
On openbsd, call getfsstat directly via libc, instead of calling it
via syscall.Syscall.

Updates #63900

Change-Id: Ib4c581160b170e6cc6017c42e959e647d97ac993
Reviewed-on: https://go-review.googlesource.com/c/go/+/538736
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Josh Rickmar <jrick@zettaport.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
2023-11-02 10:34:00 +00:00
Joel Sing
4e896d179d runtime: remove map stack version handling for openbsd
OpenBSD 6.3 is more than five years old and has not been supported for
the last four years (only 7.3 and 7.4 are currently supported). As such,
remove special handling of MAP_STACK for 6.3 and earlier.

Change-Id: I1086c910bbcade7fb3938bb1226813212794b587
Reviewed-on: https://go-review.googlesource.com/c/go/+/538458
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Aaron Bieber <aaron@bolddaemon.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
2023-11-02 08:05:10 +00:00
Robert Griesemer
6a7ef36466 test: run range-over-integer tests without need for -goexperiment
Move the range-over-function tests into range4.go.

Change-Id: Idccf30a0c7d7e8d2a17fb1c5561cf21e00506135
Reviewed-on: https://go-review.googlesource.com/c/go/+/539095
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
2023-11-02 04:17:21 +00:00
Robert Griesemer
11677d983e go/types, types2: enable range over int w/o need for goexperiment
For #61405.

Change-Id: I047ec31bc36b1707799ffef25506070613477d1f
Reviewed-on: https://go-review.googlesource.com/c/go/+/538718
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-11-02 04:17:18 +00:00
Robert Griesemer
e5ef484691 spec: document range over integer expression
This CL is partly based on CL 510535.

For #61405.

Change-Id: Ic94f6726f9eb34313f11bec7b651921d7e5c18d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/538859
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-11-02 03:57:56 +00:00
Joe Tsai
08b2f1f761 os: fix PathError.Op for dirFS.Open
This appears to be a copy-paste error from CL 455362.

The operation name used to be "open"
but seems to have been accidentally changed to "stat".
This CL reverts back to "open".

Change-Id: I3fc5168095e2d9eee3efa3cc091b10bcf4e3ecde
Reviewed-on: https://go-review.googlesource.com/c/go/+/539056
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
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Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-01 23:58:46 +00:00
qiulaidongfeng
23711f8ef7 internal/bytealg: optimize indexbyte in amd64
goos: windows
goarch: amd64
pkg: bytes
cpu: AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
                         │   old.txt   │               new.txt               │
                         │   sec/op    │   sec/op     vs base                │
IndexByte/10-16            2.613n ± 1%   2.558n ± 1%   -2.09% (p=0.014 n=10)
IndexByte/32-16            3.034n ± 1%   3.010n ± 2%        ~ (p=0.305 n=10)
IndexByte/4K-16            57.20n ± 2%   39.58n ± 2%  -30.81% (p=0.000 n=10)
IndexByte/4M-16            34.48µ ± 1%   33.83µ ± 2%   -1.87% (p=0.023 n=10)
IndexByte/64M-16           1.493m ± 2%   1.450m ± 2%   -2.89% (p=0.000 n=10)
IndexBytePortable/10-16    3.172n ± 4%   3.163n ± 2%        ~ (p=0.684 n=10)
IndexBytePortable/32-16    8.465n ± 2%   8.375n ± 3%        ~ (p=0.631 n=10)
IndexBytePortable/4K-16    852.0n ± 1%   846.6n ± 3%        ~ (p=0.971 n=10)
IndexBytePortable/4M-16    868.2µ ± 2%   856.6µ ± 2%        ~ (p=0.393 n=10)
IndexBytePortable/64M-16   13.81m ± 2%   13.88m ± 3%        ~ (p=0.684 n=10)
geomean                    1.204µ        1.148µ        -4.63%

                         │   old.txt    │               new.txt                │
                         │     B/s      │     B/s       vs base                │
IndexByte/10-16            3.565Gi ± 1%   3.641Gi ± 1%   +2.15% (p=0.015 n=10)
IndexByte/32-16            9.821Gi ± 1%   9.899Gi ± 2%        ~ (p=0.315 n=10)
IndexByte/4K-16            66.70Gi ± 2%   96.39Gi ± 2%  +44.52% (p=0.000 n=10)
IndexByte/4M-16            113.3Gi ± 1%   115.5Gi ± 2%   +1.91% (p=0.023 n=10)
IndexByte/64M-16           41.85Gi ± 2%   43.10Gi ± 2%   +2.98% (p=0.000 n=10)
IndexBytePortable/10-16    2.936Gi ± 4%   2.945Gi ± 2%        ~ (p=0.684 n=10)
IndexBytePortable/32-16    3.521Gi ± 2%   3.559Gi ± 3%        ~ (p=0.631 n=10)
IndexBytePortable/4K-16    4.477Gi ± 1%   4.506Gi ± 3%        ~ (p=0.971 n=10)
IndexBytePortable/4M-16    4.499Gi ± 2%   4.560Gi ± 2%        ~ (p=0.393 n=10)
IndexBytePortable/64M-16   4.525Gi ± 2%   4.504Gi ± 3%        ~ (p=0.684 n=10)
geomean                    10.04Gi        10.53Gi        +4.86%

For #63678

Change-Id: I0571c2b540a816d57bd6ed8bb1df4191c7992d92
GitHub-Last-Rev: 7e95b8bfb0
GitHub-Pull-Request: golang/go#63847
Reviewed-on: https://go-review.googlesource.com/c/go/+/538715
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-11-01 19:06:01 +00:00
dchaofei
ea3010d994 crypto/x509: optimize the performance of checkSignature
The loop should be terminated immediately when `algo` has been found

Fixes #52955

Change-Id: Ib3865c4616a0c1af9b72daea45f5a1750f84562f
GitHub-Last-Rev: 721322725f
GitHub-Pull-Request: golang/go#52987
Reviewed-on: https://go-review.googlesource.com/c/go/+/407215
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
2023-11-01 19:04:52 +00:00
Jes Cok
a05a25cb19 bytes,internal/bytealg: add func bytealg.LastIndexRabinKarp
Also rename 'substr' to 'sep' in IndexRabinKarp for consistency.

Change-Id: Icc2ad1116aecaf002c8264daa2fa608306c9a88a
GitHub-Last-Rev: 1784b93f53
GitHub-Pull-Request: golang/go#63854
Reviewed-on: https://go-review.googlesource.com/c/go/+/538716
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2023-11-01 19:02:57 +00:00
Bryan C. Mills
0330aad038 os: report IO_REPARSE_TAG_DEDUP files as regular in Stat and Lstat
Prior to CL 460595, Lstat reported most reparse points as regular
files. However, reparse points can in general implement unusual
behaviors (consider IO_REPARSE_TAG_AF_UNIX or IO_REPARSE_TAG_LX_CHR),
and Windows allows arbitrary user-defined reparse points, so in
general we must not assume that an unrecognized reparse tag represents
a regular file; in CL 460595, we began marking them as irregular.

As it turns out, the Data Deduplication service on Windows Server runs
an Optimization job that turns regular files into reparse files with
the tag IO_REPARSE_TAG_DEDUP. Those files still behave more-or-less
like regular files, in that they have well-defined sizes and support
random-access reads and writes, so most programs can treat them as
regular files without difficulty. However, they are still reparse
files: as a result, on servers with the Data Deduplication service
enabled, files could arbitrarily change from “regular” to “irregular”
without explicit user intervention.

Since dedup files are converted in the background and otherwise behave
like regular files, this change adds a special case to report DEDUP
reparse points as regular.

Fixes #63429.

No test because to my knowledge we don't have any Windows builders
that have the deduplication service enabled, nor do we have a way to
reliably guarantee the existence of an IO_REPARSE_TAG_DEDUP file.

(In theory we could add a builder with the service enabled on a
specific volume, write a test that encodes knowledge of that volume,
and use the GO_BUILDER_NAME environment variable to run that test only
on the specially-configured builders. However, I don't currently have
the bandwidth to reconfigure the builders in this way, and given the
simplicity of the change I think it is unlikely to regress
accidentally.)

Change-Id: I649e7ef0b67e3939a980339ce7ec6a20b31b23a1
Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/537915
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Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
2023-11-01 19:01:53 +00:00
Robert Griesemer
b7a695bd68 cmd/compile/internal/syntax: better error messages for incorrect type parameter list
When parsing a declaration of the form

        type a [b[c]]d

where a, b, c, d stand for identifiers, b[c] is parsed as a type
constraint (because an array length must be constant and an index
expression b[c] is never constant, even if b is a constant string
and c a constant index - this is crucial for disambiguation of the
various possibilities).

As a result, the error message referred to a missing type parameter
name and not an invalid array declaration.

Recognize this special case and report both possibilities (because
we can't be sure without type information) with the new error:

       "missing type parameter name or invalid array length"

ALso, change the previous error message

        "type parameter must be named"

to

        "missing type parameter name"

which is more fitting as the error refers to an absent type parameter
(rather than a type parameter that's somehow invisibly present but
unnamed).

Fixes #60812.

Change-Id: Iaad3b3a9aeff9dfe2184779f3d799f16c7500b34
Reviewed-on: https://go-review.googlesource.com/c/go/+/538856
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2023-11-01 17:49:03 +00:00
Robert Griesemer
34a5830c26 cmd/compile/internal/syntax: fix/update various comments
Change-Id: I30b448c8fcdbad94afcd7ff0dfc5cfebb485bdd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/538855
Auto-Submit: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2023-11-01 12:49:49 +00:00
Joel Sing
0aa2197279 os/signal: use syscall.Wait4 directly in tests
Rather than using syscall.Syscall6 with SYS_WAIT4, use syscall.Wait4
directly.

Updates #59667

Change-Id: I50fea3b7d10003dbc632aafd5e170a9fe96d6f42
Reviewed-on: https://go-review.googlesource.com/c/go/+/538459
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2023-11-01 07:10:32 +00:00
Joel Sing
1a58fd0fda syscall: regen zsyscall for openbsd/riscv64
This removes the unused writelen function, which was cleaned up for other
platforms in CL#529035.

Change-Id: I1999dc81276763bdc73d8590c16729447c4e8538
Reviewed-on: https://go-review.googlesource.com/c/go/+/538119
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2023-11-01 07:10:03 +00:00
Joel Sing
6ecadb4d87 syscall: regenerate zsyscall for dragonfly/freebsd/netbsd
The sysctl declaration was moved in CL 141639, however the files were
presumably not regenerated. There is no functional change, however
regenerating avoids unrelated noise in future diffs.

Change-Id: Ifb840b5853f3f1c3c88a3f94df21b6f6d3c635d4
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2023-11-01 07:09:43 +00:00
apocelipes
e73e25b624 internal/cpu: add comments to copied functions
Just as same as other copied functions,
like stringsTrimSuffix in "os/executable_procfs.go"

Change-Id: I9c9fbd75b009a5ae0e869cf1fddc77c0e08d9a67
GitHub-Last-Rev: 4c18865e15
GitHub-Pull-Request: golang/go#63704
Reviewed-on: https://go-review.googlesource.com/c/go/+/537056
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2023-10-31 21:32:19 +00:00
Cherry Mui
d2f3a68bf0 runtime: use testenv.Command in TestG0StackOverflow
For debugging timeouts.

Change-Id: I08dc86ec0264196e5fd54066655e94a9d062ed80
Reviewed-on: https://go-review.googlesource.com/c/go/+/538697
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2023-10-31 20:50:47 +00:00
Keith Randall
b11defeaed runtime: make select fairness test less picky
Allow up to 10 standard deviations from the mean, instead of
~5 that the current test allows.

10 standard deviations allows up to a 4500/5500 split.

Fixes #52465

Change-Id: Icb21c1d31fafbcf4723b75435ba5e98863e812c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/538815
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2023-10-31 20:47:35 +00:00
Keith Randall
962ccbef91 cmd/compile: ensure pointer arithmetic happens after the nil check
Have nil checks return a pointer that is known non-nil. Users of
that pointer can use the result, ensuring that they are ordered
after the nil check itself.

The order dependence goes away after scheduling, when we've fixed
an order. At that point we move uses back to the original pointer
so it doesn't change regalloc any.

This prevents pointer arithmetic on nil from being spilled to the
stack and then observed by a stack scan.

Fixes #63657

Change-Id: I1a5fa4f2e6d9000d672792b4f90dfc1b7b67f6ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/537775
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2023-10-31 20:45:54 +00:00
Keith Randall
43b57b8516 cmd/compile: handle constant pointer offsets in dead store elimination
Update #63657
Update #45573

Change-Id: I163c6038c13d974dc0ca9f02144472bc05331826
Reviewed-on: https://go-review.googlesource.com/c/go/+/538595
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2023-10-31 20:42:56 +00:00
Keith Randall
66b8107a26 runtime: on arm32, detect whether we have sync instructions
Make the choice of using these instructions dynamic (triggered by cpu
feature detection) rather than static (trigered by GOARM setting).

if GOARM>=7, we know we have them.
For GOARM=5/6, dynamically dispatch based on auxv information.

Update #17082
Update #61588

Change-Id: I8a50481d942f62cf36348998a99225d0d242f8af
Reviewed-on: https://go-review.googlesource.com/c/go/+/525637
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2023-10-31 20:38:55 +00:00
Mateusz Poliwczak
dd84bb6824 crypto/x509: add new OID type and use it in Certificate
Fixes #60665

Change-Id: I814b7d4b26b964f74443584fb2048b3e27e3b675
GitHub-Last-Rev: 693c741c76
GitHub-Pull-Request: golang/go#62096
Reviewed-on: https://go-review.googlesource.com/c/go/+/520535
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2023-10-31 19:22:19 +00:00
Jes Cok
68e52bc03c bytes,internal/bytealg: eliminate IndexRabinKarpBytes using generics
This is a follow-up to CL 538175.

Change-Id: Iec2523b36a16d7e157c17858c89fcd43c2470d58
GitHub-Last-Rev: 812d36e57c
GitHub-Pull-Request: golang/go#63770
Reviewed-on: https://go-review.googlesource.com/c/go/+/538195
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2023-10-31 17:14:04 +00:00
Jes Cok
cbc403af1d cmd/compile/internal/ssa: adjust default to the end in *Block.AuxIntString
Change-Id: Id48cade7811e2dfbf78d3171fe202ad272534e37
GitHub-Last-Rev: ea6abb2dc2
GitHub-Pull-Request: golang/go#63808
Reviewed-on: https://go-review.googlesource.com/c/go/+/538377
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2023-10-31 17:13:33 +00:00
Cuong Manh Le
3dea7c3f69 hash/maphash: weaken avalanche test a bit more
CL 495415 weaken avalanche, making allowed range from 43% to 57%. Since
then, we only see a failure with 58% on linux-386-longtest builder, so
let give the test a bit more wiggle room: 40% to 59%.

Fixes #60170

Change-Id: I9528ebc8601975b733c3d9fd464ce41429654273
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2023-10-31 17:00:31 +00:00
cui fliter
289b823ac9 internal/bytealg: optimize Count/CountString in arm64
For #63678

goos: darwin
goarch: arm64
pkg: strings
                          │ count_old.txt │            count_new.txt            │
                          │    sec/op     │   sec/op     vs base                │
CountHard1-8                 368.7µ ± 11%   332.0µ ± 1%   -9.95% (p=0.002 n=10)
CountHard2-8                 348.8µ ±  5%   333.1µ ± 1%   -4.51% (p=0.000 n=10)
CountHard3-8                 402.7µ ± 25%   359.5µ ± 1%  -10.75% (p=0.000 n=10)
CountTorture-8              10.536µ ± 23%   9.913µ ± 0%   -5.91% (p=0.000 n=10)
CountTortureOverlapping-8    74.86µ ±  9%   67.56µ ± 1%   -9.75% (p=0.000 n=10)
CountByte/10-8               6.905n ±  3%   6.690n ± 1%   -3.11% (p=0.001 n=10)
CountByte/32-8               3.247n ± 13%   3.207n ± 2%   -1.23% (p=0.030 n=10)
CountByte/4096-8             83.72n ±  1%   82.58n ± 1%   -1.36% (p=0.007 n=10)
CountByte/4194304-8          85.17µ ±  5%   84.02µ ± 8%        ~ (p=0.075 n=10)
CountByte/67108864-8         1.497m ±  8%   1.397m ± 2%   -6.69% (p=0.000 n=10)
geomean                      9.977µ         9.426µ        -5.53%

                     │ count_old.txt │            count_new.txt            │
                     │      B/s      │     B/s       vs base               │
CountByte/10-8         1.349Gi ±  3%   1.392Gi ± 1%  +3.20% (p=0.002 n=10)
CountByte/32-8         9.180Gi ± 11%   9.294Gi ± 2%  +1.24% (p=0.029 n=10)
CountByte/4096-8       45.57Gi ±  1%   46.20Gi ± 1%  +1.38% (p=0.007 n=10)
CountByte/4194304-8    45.86Gi ±  5%   46.49Gi ± 7%       ~ (p=0.075 n=10)
CountByte/67108864-8   41.75Gi ±  8%   44.74Gi ± 2%  +7.16% (p=0.000 n=10)
geomean                16.10Gi         16.55Gi       +2.85%

Change-Id: Ifc2173ba3a926b0fa9598372d4404b8645929d45
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2023-10-31 17:00:27 +00:00
Joel Sing
e293c4b509 runtime: allocate crash stack via stackalloc
On some platforms (notably OpenBSD), stacks must be specifically allocated
and marked as being stack memory. Allocate the crash stack using stackalloc,
which ensures these requirements are met, rather than using a global Go
variable.

Fixes #63794

Change-Id: I6513575797dd69ff0a36f3bfd4e5fc3bd95cbf50
Reviewed-on: https://go-review.googlesource.com/c/go/+/538457
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2023-10-31 16:28:14 +00:00
Robert Griesemer
b7a66be69c cmd/compile/internal/syntax: set up dummy name and type if func name is missing
We do the same elsewhere (e.g. in parser.name when a name is missing).
This ensures functions have a (dummy) name and a non-nil type.
Avoids a crash in the type-checker (verified manually).
A test was added here (rather than the type checker) because type-
checker tests are shared between types2 and go/types and error
recovery in this case is different.

Fixes #63835.

Change-Id: I1460fc88d23d80b8d8c181c774d6b0a56ca06317
Reviewed-on: https://go-review.googlesource.com/c/go/+/538059
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2023-10-31 16:12:41 +00:00
Robert Griesemer
25a59decd5 go/types, types2: more concise error if conversion fails due to integer overflow
This change brings the error message for this case back in line
with the pre-Go1.18 error message.

Fixes #63563.

Change-Id: I3c6587d420907b34ee8a5f295ecb231e9f008380
Reviewed-on: https://go-review.googlesource.com/c/go/+/538058
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2023-10-31 16:11:16 +00:00
Joel Sing
b6a3c0273e cmd/dist,internal/platform: enable openbsd/ppc64 port
Updates #56001

Change-Id: I16440114ecf661e9fc17d304ab3b16bc97ef82f8
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2023-10-31 12:43:19 +00:00
Jes Cok
f215a0be4d cmd/compile/internal/ssa: add missing space in comment
Change-Id: I54c3e8e0d61ceb6533284098dc32944f9f14459e
GitHub-Last-Rev: 9793d9d039
GitHub-Pull-Request: golang/go#63806
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2023-10-30 21:52:15 +00:00
qiulaidongfeng
9c2ab20d48 internal/fmtsort: makeChans pin pointer
Complete TODO.

For #49431

Change-Id: I1399205e430ebd83182c3e0c4becf1fde32d433e
GitHub-Last-Rev: 02cdea740b
GitHub-Pull-Request: golang/go#62673
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2023-10-30 21:00:16 +00:00
Quan Tong
214ce28503 cmd/go/internal/help: update the documentation to match the design and implementation
The existing documentation imply that the build constraints
should be ignored after a block comments, but actually it's not.

Fixes #63502

Change-Id: I0597934b7a7eeab8908bf06e1312169b3702bf05
Reviewed-on: https://go-review.googlesource.com/c/go/+/535635
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2023-10-30 18:16:15 +00:00
Allen Li
1e95fc7ffe log/slog: Reorder doc comment for level constants
pkgsite and go doc print the doc comment *after* the code, resulting in:

    const (
            LevelDebug Level = -4
            ...
    )

    Many paragraphs...

    Names for common levels.

The "Names for common levels." feels out of place and confusing at the bottom.

This is also consistent with the recommendation for the first sentence in doc comments to be the "summary".

Change-Id: I656e85e27d2a4b23eaba5f2c1f4f811a88848c83
GitHub-Last-Rev: d9f7ee9b94
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2023-10-30 17:34:43 +00:00
Russ Cox
8abde68f19 math/rand/v2: delete Mitchell/Reeds source
These slowdowns are because we are now using PCG instead of the
Mitchell/Reeds LFSR for the benchmarks. PCG is in fact a bit slower
(but generates statically far better random numbers).

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 01ff938549.amd64 │           afa459a2f0.amd64           │
                        │      sec/op      │    sec/op     vs base                │
PCG_DXSM-32                    1.490n ± 0%    1.488n ± 2%        ~ (p=0.408 n=20)
SourceUint64-32                1.352n ± 1%    1.450n ± 3%   +7.21% (p=0.000 n=20)
GlobalInt64-32                 2.083n ± 0%    2.067n ± 2%        ~ (p=0.223 n=20)
GlobalInt64Parallel-32        0.1035n ± 1%   0.1044n ± 2%        ~ (p=0.010 n=20)
GlobalUint64-32                2.038n ± 1%    2.085n ± 0%   +2.28% (p=0.000 n=20)
GlobalUint64Parallel-32       0.1006n ± 1%   0.1008n ± 1%        ~ (p=0.733 n=20)
Int64-32                       1.687n ± 2%    1.779n ± 1%   +5.48% (p=0.000 n=20)
Uint64-32                      1.674n ± 2%    1.854n ± 2%  +10.69% (p=0.000 n=20)
GlobalIntN1000-32              3.135n ± 1%    3.140n ± 3%        ~ (p=0.794 n=20)
IntN1000-32                    2.478n ± 1%    2.496n ± 1%   +0.73% (p=0.006 n=20)
Int64N1000-32                  2.455n ± 1%    2.510n ± 2%   +2.22% (p=0.000 n=20)
Int64N1e8-32                   2.467n ± 2%    2.471n ± 2%        ~ (p=0.050 n=20)
Int64N1e9-32                   2.454n ± 1%    2.488n ± 2%   +1.39% (p=0.000 n=20)
Int64N2e9-32                   2.482n ± 1%    2.478n ± 2%        ~ (p=0.066 n=20)
Int64N1e18-32                  3.349n ± 2%    3.088n ± 1%   -7.81% (p=0.000 n=20)
Int64N2e18-32                  3.537n ± 1%    3.493n ± 1%   -1.24% (p=0.002 n=20)
Int64N4e18-32                  4.917n ± 0%    5.060n ± 2%   +2.91% (p=0.000 n=20)
Int32N1000-32                  2.386n ± 1%    2.620n ± 1%   +9.76% (p=0.000 n=20)
Int32N1e8-32                   2.366n ± 1%    2.652n ± 0%  +12.11% (p=0.000 n=20)
Int32N1e9-32                   2.355n ± 2%    2.644n ± 1%  +12.32% (p=0.000 n=20)
Int32N2e9-32                   2.371n ± 1%    2.619n ± 2%  +10.48% (p=0.000 n=20)
Float32-32                     2.245n ± 2%    2.261n ± 1%        ~ (p=0.625 n=20)
Float64-32                     2.235n ± 1%    2.241n ± 2%        ~ (p=0.393 n=20)
ExpFloat64-32                  3.813n ± 3%    3.716n ± 1%   -2.53% (p=0.000 n=20)
NormFloat64-32                 3.652n ± 2%    3.718n ± 1%   +1.79% (p=0.006 n=20)
Perm3-32                       33.12n ± 3%    34.11n ± 2%        ~ (p=0.021 n=20)
Perm30-32                      205.1n ± 1%    200.6n ± 0%   -2.17% (p=0.000 n=20)
Perm30ViaShuffle-32            110.8n ± 1%    109.7n ± 1%   -0.99% (p=0.002 n=20)
ShuffleOverhead-32             113.0n ± 1%    107.2n ± 1%   -5.09% (p=0.000 n=20)
Concurrent-32                  2.100n ± 0%    2.108n ± 6%        ~ (p=0.103 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
                       │ 01ff938549.arm64 │           afa459a2f0.arm64           │
                       │      sec/op      │    sec/op     vs base                │
PCG_DXSM-8                    2.531n ± 0%    2.531n ± 0%        ~ (p=0.763 n=20)
SourceUint64-8                2.258n ± 1%    2.531n ± 0%  +12.09% (p=0.000 n=20)
GlobalInt64-8                 2.167n ± 0%    2.177n ± 1%        ~ (p=0.213 n=20)
GlobalInt64Parallel-8        0.4310n ± 0%   0.4319n ± 0%        ~ (p=0.027 n=20)
GlobalUint64-8                2.182n ± 1%    2.185n ± 1%        ~ (p=0.683 n=20)
GlobalUint64Parallel-8       0.4297n ± 0%   0.4295n ± 1%        ~ (p=0.941 n=20)
Int64-8                       2.472n ± 1%    4.104n ± 0%  +66.00% (p=0.000 n=20)
Uint64-8                      2.449n ± 1%    4.080n ± 0%  +66.60% (p=0.000 n=20)
GlobalIntN1000-8              2.814n ± 2%    2.814n ± 1%        ~ (p=0.972 n=20)
IntN1000-8                    2.998n ± 2%    4.140n ± 0%  +38.09% (p=0.000 n=20)
Int64N1000-8                  2.949n ± 2%    4.139n ± 0%  +40.35% (p=0.000 n=20)
Int64N1e8-8                   2.953n ± 2%    4.140n ± 0%  +40.22% (p=0.000 n=20)
Int64N1e9-8                   2.950n ± 0%    4.139n ± 0%  +40.32% (p=0.000 n=20)
Int64N2e9-8                   2.946n ± 2%    4.140n ± 0%  +40.53% (p=0.000 n=20)
Int64N1e18-8                  3.779n ± 1%    5.273n ± 0%  +39.52% (p=0.000 n=20)
Int64N2e18-8                  4.370n ± 1%    6.059n ± 0%  +38.65% (p=0.000 n=20)
Int64N4e18-8                  6.544n ± 1%    8.803n ± 0%  +34.52% (p=0.000 n=20)
Int32N1000-8                  2.950n ± 0%    4.131n ± 0%  +40.06% (p=0.000 n=20)
Int32N1e8-8                   2.950n ± 2%    4.131n ± 0%  +40.03% (p=0.000 n=20)
Int32N1e9-8                   2.951n ± 2%    4.131n ± 0%  +39.99% (p=0.000 n=20)
Int32N2e9-8                   2.950n ± 2%    4.131n ± 0%  +40.03% (p=0.000 n=20)
Float32-8                     3.441n ± 0%    4.110n ± 0%  +19.44% (p=0.000 n=20)
Float64-8                     3.442n ± 0%    4.104n ± 0%  +19.24% (p=0.000 n=20)
ExpFloat64-8                  4.481n ± 0%    5.338n ± 0%  +19.11% (p=0.000 n=20)
NormFloat64-8                 4.725n ± 0%    5.731n ± 0%  +21.28% (p=0.000 n=20)
Perm3-8                       26.55n ± 0%    26.62n ± 0%   +0.28% (p=0.000 n=20)
Perm30-8                      181.9n ± 0%    194.6n ± 2%   +6.98% (p=0.000 n=20)
Perm30ViaShuffle-8            142.9n ± 0%    156.4n ± 0%   +9.45% (p=0.000 n=20)
ShuffleOverhead-8             120.8n ± 2%    125.8n ± 0%   +4.10% (p=0.000 n=20)
Concurrent-8                  2.421n ± 6%    2.654n ± 6%   +9.67% (p=0.002 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 01ff938549.386 │            afa459a2f0.386             │
                        │     sec/op     │    sec/op     vs base                 │
PCG_DXSM-32                  7.613n ± 1%    7.793n ± 2%    +2.38% (p=0.000 n=20)
SourceUint64-32              2.069n ± 0%    7.680n ± 1%  +271.19% (p=0.000 n=20)
GlobalInt64-32               3.456n ± 1%    3.474n ± 3%         ~ (p=0.654 n=20)
GlobalInt64Parallel-32      0.3252n ± 0%   0.3253n ± 0%         ~ (p=0.952 n=20)
GlobalUint64-32              3.573n ± 1%    3.433n ± 2%    -3.92% (p=0.000 n=20)
GlobalUint64Parallel-32     0.3159n ± 0%   0.3156n ± 0%         ~ (p=0.223 n=20)
Int64-32                     2.562n ± 2%    7.707n ± 1%  +200.74% (p=0.000 n=20)
Uint64-32                    2.592n ± 0%    7.714n ± 1%  +197.65% (p=0.000 n=20)
GlobalIntN1000-32            6.266n ± 2%    6.236n ± 1%         ~ (p=0.039 n=20)
IntN1000-32                  4.724n ± 2%   10.410n ± 1%  +120.39% (p=0.000 n=20)
Int64N1000-32                5.490n ± 2%   10.975n ± 2%   +99.89% (p=0.000 n=20)
Int64N1e8-32                 5.513n ± 2%   10.980n ± 1%   +99.15% (p=0.000 n=20)
Int64N1e9-32                 5.476n ± 1%   10.950n ± 0%   +99.96% (p=0.000 n=20)
Int64N2e9-32                 5.501n ± 2%   11.110n ± 1%  +101.96% (p=0.000 n=20)
Int64N1e18-32                9.043n ± 2%   15.180n ± 2%   +67.86% (p=0.000 n=20)
Int64N2e18-32                9.601n ± 2%   15.610n ± 1%   +62.60% (p=0.000 n=20)
Int64N4e18-32                12.00n ± 1%    19.23n ± 2%   +60.14% (p=0.000 n=20)
Int32N1000-32                4.829n ± 2%   10.345n ± 1%  +114.25% (p=0.000 n=20)
Int32N1e8-32                 4.825n ± 2%   10.330n ± 1%  +114.09% (p=0.000 n=20)
Int32N1e9-32                 4.830n ± 2%   10.350n ± 1%  +114.26% (p=0.000 n=20)
Int32N2e9-32                 4.750n ± 2%   10.345n ± 1%  +117.81% (p=0.000 n=20)
Float32-32                   10.89n ± 4%    13.57n ± 1%   +24.61% (p=0.000 n=20)
Float64-32                   19.60n ± 4%    22.95n ± 4%   +17.12% (p=0.000 n=20)
ExpFloat64-32                12.96n ± 3%    15.23n ± 2%   +17.47% (p=0.000 n=20)
NormFloat64-32               7.516n ± 1%   13.780n ± 1%   +83.34% (p=0.000 n=20)
Perm3-32                     36.78n ± 2%    46.62n ± 2%   +26.72% (p=0.000 n=20)
Perm30-32                    238.9n ± 2%    400.7n ± 1%   +67.73% (p=0.000 n=20)
Perm30ViaShuffle-32          189.7n ± 2%    350.5n ± 1%   +84.79% (p=0.000 n=20)
ShuffleOverhead-32           159.8n ± 1%    326.0n ± 2%  +104.01% (p=0.000 n=20)
Concurrent-32                3.286n ± 1%    3.290n ± 0%         ~ (p=0.743 n=20)

On the other hand, compared to the original "update benchmarks" CL,
the cleanups we've made more than compensate for PCG being a bit
slower than LFSR, at least on 64-bit x86. ARM64 (Apple M1) is a bit
slower: perhaps the 64x64→128 multiply is slower there for some reason.
386 is noticeably slower, but it's also a non-SSA backend.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.amd64 │            afa459a2f0.amd64            │
                        │      sec/op      │    sec/op     vs base                  │
SourceUint64-32                1.555n ± 1%    1.450n ± 3%   -6.78% (p=0.000 n=20)
GlobalInt64-32                 2.071n ± 1%    2.067n ± 2%        ~ (p=0.673 n=20)
GlobalInt63Parallel-32        0.1023n ± 1%
GlobalInt64Parallel-32                       0.1044n ± 2%
GlobalUint64-32                5.193n ± 1%    2.085n ± 0%  -59.86% (p=0.000 n=20)
GlobalUint64Parallel-32       0.2341n ± 0%   0.1008n ± 1%  -56.93% (p=0.000 n=20)
Int64-32                       2.056n ± 2%    1.779n ± 1%  -13.47% (p=0.000 n=20)
Uint64-32                      2.077n ± 2%    1.854n ± 2%  -10.74% (p=0.000 n=20)
GlobalIntN1000-32              4.077n ± 2%    3.140n ± 3%  -22.98% (p=0.000 n=20)
IntN1000-32                    3.476n ± 2%    2.496n ± 1%  -28.19% (p=0.000 n=20)
Int64N1000-32                  3.059n ± 1%    2.510n ± 2%  -17.96% (p=0.000 n=20)
Int64N1e8-32                   2.942n ± 1%    2.471n ± 2%  -15.98% (p=0.000 n=20)
Int64N1e9-32                   2.932n ± 1%    2.488n ± 2%  -15.14% (p=0.000 n=20)
Int64N2e9-32                   2.925n ± 1%    2.478n ± 2%  -15.30% (p=0.000 n=20)
Int64N1e18-32                  3.116n ± 1%    3.088n ± 1%        ~ (p=0.013 n=20)
Int64N2e18-32                  4.067n ± 1%    3.493n ± 1%  -14.11% (p=0.000 n=20)
Int64N4e18-32                  4.054n ± 1%    5.060n ± 2%  +24.80% (p=0.000 n=20)
Int32N1000-32                  2.951n ± 1%    2.620n ± 1%  -11.22% (p=0.000 n=20)
Int32N1e8-32                   3.102n ± 1%    2.652n ± 0%  -14.50% (p=0.000 n=20)
Int32N1e9-32                   3.535n ± 1%    2.644n ± 1%  -25.20% (p=0.000 n=20)
Int32N2e9-32                   3.514n ± 1%    2.619n ± 2%  -25.47% (p=0.000 n=20)
Float32-32                     2.760n ± 1%    2.261n ± 1%  -18.06% (p=0.000 n=20)
Float64-32                     2.284n ± 1%    2.241n ± 2%        ~ (p=0.016 n=20)
ExpFloat64-32                  3.757n ± 1%    3.716n ± 1%        ~ (p=0.034 n=20)
NormFloat64-32                 3.837n ± 1%    3.718n ± 1%   -3.09% (p=0.000 n=20)
Perm3-32                       35.23n ± 2%    34.11n ± 2%   -3.19% (p=0.000 n=20)
Perm30-32                      208.8n ± 1%    200.6n ± 0%   -3.93% (p=0.000 n=20)
Perm30ViaShuffle-32            111.7n ± 1%    109.7n ± 1%   -1.84% (p=0.000 n=20)
ShuffleOverhead-32             101.1n ± 1%    107.2n ± 1%   +6.03% (p=0.000 n=20)
Concurrent-32                  2.108n ± 7%    2.108n ± 6%        ~ (p=0.644 n=20)
PCG_DXSM-32                                   1.488n ± 2%

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ 220860f76f.arm64 │            afa459a2f0.arm64            │
                       │      sec/op      │    sec/op     vs base                  │
SourceUint64-8                2.316n ± 1%    2.531n ± 0%   +9.33% (p=0.000 n=20)
GlobalInt64-8                 2.183n ± 1%    2.177n ± 1%        ~ (p=0.533 n=20)
GlobalInt63Parallel-8        0.4331n ± 0%
GlobalInt64Parallel-8                       0.4319n ± 0%
GlobalUint64-8                4.377n ± 2%    2.185n ± 1%  -50.07% (p=0.000 n=20)
GlobalUint64Parallel-8       0.9237n ± 0%   0.4295n ± 1%  -53.50% (p=0.000 n=20)
Int64-8                       2.538n ± 1%    4.104n ± 0%  +61.68% (p=0.000 n=20)
Uint64-8                      2.604n ± 1%    4.080n ± 0%  +56.68% (p=0.000 n=20)
GlobalIntN1000-8              3.857n ± 2%    2.814n ± 1%  -27.04% (p=0.000 n=20)
IntN1000-8                    3.822n ± 2%    4.140n ± 0%   +8.32% (p=0.000 n=20)
Int64N1000-8                  3.318n ± 0%    4.139n ± 0%  +24.74% (p=0.000 n=20)
Int64N1e8-8                   3.349n ± 1%    4.140n ± 0%  +23.64% (p=0.000 n=20)
Int64N1e9-8                   3.317n ± 2%    4.139n ± 0%  +24.80% (p=0.000 n=20)
Int64N2e9-8                   3.317n ± 2%    4.140n ± 0%  +24.81% (p=0.000 n=20)
Int64N1e18-8                  3.542n ± 1%    5.273n ± 0%  +48.85% (p=0.000 n=20)
Int64N2e18-8                  5.087n ± 0%    6.059n ± 0%  +19.12% (p=0.000 n=20)
Int64N4e18-8                  5.084n ± 0%    8.803n ± 0%  +73.16% (p=0.000 n=20)
Int32N1000-8                  3.208n ± 2%    4.131n ± 0%  +28.79% (p=0.000 n=20)
Int32N1e8-8                   3.610n ± 1%    4.131n ± 0%  +14.43% (p=0.000 n=20)
Int32N1e9-8                   4.235n ± 0%    4.131n ± 0%   -2.44% (p=0.000 n=20)
Int32N2e9-8                   4.229n ± 1%    4.131n ± 0%   -2.33% (p=0.000 n=20)
Float32-8                     3.468n ± 0%    4.110n ± 0%  +18.50% (p=0.000 n=20)
Float64-8                     3.447n ± 0%    4.104n ± 0%  +19.05% (p=0.000 n=20)
ExpFloat64-8                  4.567n ± 0%    5.338n ± 0%  +16.86% (p=0.000 n=20)
NormFloat64-8                 4.821n ± 0%    5.731n ± 0%  +18.89% (p=0.000 n=20)
Perm3-8                       28.89n ± 0%    26.62n ± 0%   -7.84% (p=0.000 n=20)
Perm30-8                      175.7n ± 0%    194.6n ± 2%  +10.76% (p=0.000 n=20)
Perm30ViaShuffle-8            153.5n ± 0%    156.4n ± 0%   +1.86% (p=0.000 n=20)
ShuffleOverhead-8             119.8n ± 1%    125.8n ± 0%   +4.97% (p=0.000 n=20)
Concurrent-8                  2.433n ± 3%    2.654n ± 6%   +9.13% (p=0.001 n=20)
PCG_DXSM-8                                   2.531n ± 0%

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 220860f76f.386 │             afa459a2f0.386              │
                        │     sec/op     │    sec/op     vs base                   │
SourceUint64-32             2.370n ±  1%    7.680n ± 1%  +224.05% (p=0.000 n=20)
GlobalInt64-32              3.569n ±  1%    3.474n ± 3%    -2.66% (p=0.001 n=20)
GlobalInt63Parallel-32     0.3221n ±  1%
GlobalInt64Parallel-32                     0.3253n ± 0%
GlobalUint64-32             8.797n ± 10%    3.433n ± 2%   -60.98% (p=0.000 n=20)
GlobalUint64Parallel-32    0.6351n ±  0%   0.3156n ± 0%   -50.31% (p=0.000 n=20)
Int64-32                    2.612n ±  2%    7.707n ± 1%  +195.04% (p=0.000 n=20)
Uint64-32                   3.350n ±  1%    7.714n ± 1%  +130.25% (p=0.000 n=20)
GlobalIntN1000-32           5.892n ±  1%    6.236n ± 1%    +5.82% (p=0.000 n=20)
IntN1000-32                 4.546n ±  1%   10.410n ± 1%  +128.97% (p=0.000 n=20)
Int64N1000-32               14.59n ±  1%    10.97n ± 2%   -24.75% (p=0.000 n=20)
Int64N1e8-32                14.76n ±  2%    10.98n ± 1%   -25.58% (p=0.000 n=20)
Int64N1e9-32                16.57n ±  1%    10.95n ± 0%   -33.90% (p=0.000 n=20)
Int64N2e9-32                14.54n ±  1%    11.11n ± 1%   -23.62% (p=0.000 n=20)
Int64N1e18-32               16.14n ±  1%    15.18n ± 2%    -5.95% (p=0.000 n=20)
Int64N2e18-32               18.10n ±  1%    15.61n ± 1%   -13.73% (p=0.000 n=20)
Int64N4e18-32               18.65n ±  1%    19.23n ± 2%    +3.08% (p=0.000 n=20)
Int32N1000-32               3.560n ±  1%   10.345n ± 1%  +190.55% (p=0.000 n=20)
Int32N1e8-32                3.770n ±  2%   10.330n ± 1%  +174.01% (p=0.000 n=20)
Int32N1e9-32                4.098n ±  0%   10.350n ± 1%  +152.53% (p=0.000 n=20)
Int32N2e9-32                4.179n ±  1%   10.345n ± 1%  +147.52% (p=0.000 n=20)
Float32-32                  21.18n ±  4%    13.57n ± 1%   -35.93% (p=0.000 n=20)
Float64-32                  20.60n ±  2%    22.95n ± 4%   +11.41% (p=0.000 n=20)
ExpFloat64-32               13.07n ±  0%    15.23n ± 2%   +16.48% (p=0.000 n=20)
NormFloat64-32              7.738n ±  2%   13.780n ± 1%   +78.08% (p=0.000 n=20)
Perm3-32                    36.73n ±  1%    46.62n ± 2%   +26.91% (p=0.000 n=20)
Perm30-32                   211.9n ±  1%    400.7n ± 1%   +89.05% (p=0.000 n=20)
Perm30ViaShuffle-32         165.2n ±  1%    350.5n ± 1%  +112.20% (p=0.000 n=20)
ShuffleOverhead-32          133.9n ±  1%    326.0n ± 2%  +143.37% (p=0.000 n=20)
Concurrent-32               3.287n ±  2%    3.290n ± 0%         ~ (p=0.365 n=20)
PCG_DXSM-32                                 7.793n ± 2%

For #61716.

Change-Id: I4e9c0525b5f84a2ac46f23da9e365495e2d05777
Reviewed-on: https://go-review.googlesource.com/c/go/+/502506
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-30 17:09:26 +00:00
Russ Cox
8631fcbf31 math/rand/v2: add PCG-DXSM
For the original math/rand, we ported Plan 9's random number
generator, which was a refinement by Ken Thompson of an algorithm
by Don Mitchell and Jim Reeds, which Mitchell in turn recalls as
having been derived from an algorithm by Marsaglia. At its core,
it is an additive lagged Fibonacci generator (ALFG).

Whatever the details of the history, this generator is nowhere
near the current state of the art for simple, pseudo-random
generators.

This CL adds an implementation of Melissa O'Neill's PCG, specifically
the variant PCG-DXSM, which she defined after writing the PCG paper
and which is now the default in Numpy. The update is slightly slower
(a few multiplies and adds, instead of a few adds), but the state
is dramatically smaller (2 words instead of 607). The statistical
output properties are better too.

A followup CL will delete the old generator.

PCG is the only change here, so no benchmarks should be affected.
Including them anyway as further evidence for caution.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 8993506f2f.amd64 │           01ff938549.amd64           │
                        │      sec/op      │    sec/op     vs base                │
SourceUint64-32                1.325n ± 1%    1.352n ± 1%   +2.00% (p=0.000 n=20)
GlobalInt64-32                 2.240n ± 1%    2.083n ± 0%   -7.03% (p=0.000 n=20)
GlobalInt64Parallel-32        0.1041n ± 1%   0.1035n ± 1%        ~ (p=0.064 n=20)
GlobalUint64-32                2.072n ± 3%    2.038n ± 1%        ~ (p=0.089 n=20)
GlobalUint64Parallel-32       0.1008n ± 1%   0.1006n ± 1%        ~ (p=0.804 n=20)
Int64-32                       1.716n ± 1%    1.687n ± 2%        ~ (p=0.045 n=20)
Uint64-32                      1.665n ± 1%    1.674n ± 2%        ~ (p=0.878 n=20)
GlobalIntN1000-32              3.335n ± 1%    3.135n ± 1%   -6.00% (p=0.000 n=20)
IntN1000-32                    2.484n ± 1%    2.478n ± 1%        ~ (p=0.085 n=20)
Int64N1000-32                  2.502n ± 2%    2.455n ± 1%   -1.88% (p=0.002 n=20)
Int64N1e8-32                   2.484n ± 2%    2.467n ± 2%        ~ (p=0.048 n=20)
Int64N1e9-32                   2.502n ± 0%    2.454n ± 1%   -1.92% (p=0.000 n=20)
Int64N2e9-32                   2.502n ± 0%    2.482n ± 1%   -0.76% (p=0.000 n=20)
Int64N1e18-32                  3.201n ± 1%    3.349n ± 2%   +4.62% (p=0.000 n=20)
Int64N2e18-32                  3.504n ± 1%    3.537n ± 1%        ~ (p=0.185 n=20)
Int64N4e18-32                  4.873n ± 1%    4.917n ± 0%   +0.90% (p=0.000 n=20)
Int32N1000-32                  2.639n ± 1%    2.386n ± 1%   -9.57% (p=0.000 n=20)
Int32N1e8-32                   2.686n ± 2%    2.366n ± 1%  -11.91% (p=0.000 n=20)
Int32N1e9-32                   2.636n ± 1%    2.355n ± 2%  -10.70% (p=0.000 n=20)
Int32N2e9-32                   2.660n ± 1%    2.371n ± 1%  -10.88% (p=0.000 n=20)
Float32-32                     2.261n ± 1%    2.245n ± 2%        ~ (p=0.752 n=20)
Float64-32                     2.280n ± 1%    2.235n ± 1%   -1.97% (p=0.007 n=20)
ExpFloat64-32                  3.891n ± 1%    3.813n ± 3%        ~ (p=0.087 n=20)
NormFloat64-32                 3.711n ± 1%    3.652n ± 2%        ~ (p=0.021 n=20)
Perm3-32                       32.60n ± 2%    33.12n ± 3%        ~ (p=0.107 n=20)
Perm30-32                      204.2n ± 0%    205.1n ± 1%        ~ (p=0.358 n=20)
Perm30ViaShuffle-32            121.7n ± 2%    110.8n ± 1%   -8.96% (p=0.000 n=20)
ShuffleOverhead-32             106.2n ± 2%    113.0n ± 1%   +6.36% (p=0.000 n=20)
Concurrent-32                  2.190n ± 5%    2.100n ± 0%   -4.13% (p=0.001 n=20)
PCG_DXSM-32                                   1.490n ± 0%

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ 8993506f2f.arm64 │           01ff938549.arm64           │
                       │      sec/op      │    sec/op     vs base                │
SourceUint64-8                2.271n ± 0%    2.258n ± 1%        ~ (p=0.167 n=20)
GlobalInt64-8                 2.161n ± 1%    2.167n ± 0%        ~ (p=0.693 n=20)
GlobalInt64Parallel-8        0.4303n ± 0%   0.4310n ± 0%        ~ (p=0.051 n=20)
GlobalUint64-8                2.164n ± 1%    2.182n ± 1%        ~ (p=0.042 n=20)
GlobalUint64Parallel-8       0.4287n ± 0%   0.4297n ± 0%        ~ (p=0.082 n=20)
Int64-8                       2.478n ± 1%    2.472n ± 1%        ~ (p=0.151 n=20)
Uint64-8                      2.460n ± 1%    2.449n ± 1%        ~ (p=0.013 n=20)
GlobalIntN1000-8              2.814n ± 2%    2.814n ± 2%        ~ (p=0.821 n=20)
IntN1000-8                    3.003n ± 2%    2.998n ± 2%        ~ (p=0.024 n=20)
Int64N1000-8                  2.954n ± 0%    2.949n ± 2%        ~ (p=0.192 n=20)
Int64N1e8-8                   2.956n ± 0%    2.953n ± 2%        ~ (p=0.109 n=20)
Int64N1e9-8                   3.325n ± 0%    2.950n ± 0%  -11.26% (p=0.000 n=20)
Int64N2e9-8                   2.956n ± 2%    2.946n ± 2%        ~ (p=0.027 n=20)
Int64N1e18-8                  3.780n ± 1%    3.779n ± 1%        ~ (p=0.815 n=20)
Int64N2e18-8                  4.385n ± 0%    4.370n ± 1%        ~ (p=0.402 n=20)
Int64N4e18-8                  6.527n ± 0%    6.544n ± 1%        ~ (p=0.140 n=20)
Int32N1000-8                  2.964n ± 1%    2.950n ± 0%   -0.47% (p=0.002 n=20)
Int32N1e8-8                   2.964n ± 1%    2.950n ± 2%        ~ (p=0.013 n=20)
Int32N1e9-8                   2.963n ± 2%    2.951n ± 2%        ~ (p=0.062 n=20)
Int32N2e9-8                   2.961n ± 2%    2.950n ± 2%   -0.37% (p=0.002 n=20)
Float32-8                     3.442n ± 0%    3.441n ± 0%        ~ (p=0.211 n=20)
Float64-8                     3.442n ± 0%    3.442n ± 0%        ~ (p=0.067 n=20)
ExpFloat64-8                  4.472n ± 0%    4.481n ± 0%   +0.20% (p=0.000 n=20)
NormFloat64-8                 4.734n ± 0%    4.725n ± 0%   -0.19% (p=0.003 n=20)
Perm3-8                       26.55n ± 0%    26.55n ± 0%        ~ (p=0.833 n=20)
Perm30-8                      181.9n ± 0%    181.9n ± 0%   -0.03% (p=0.004 n=20)
Perm30ViaShuffle-8            143.1n ± 0%    142.9n ± 0%        ~ (p=0.204 n=20)
ShuffleOverhead-8             120.6n ± 1%    120.8n ± 2%        ~ (p=0.102 n=20)
Concurrent-8                  2.357n ± 2%    2.421n ± 6%        ~ (p=0.016 n=20)
PCG_DXSM-8                                   2.531n ± 0%

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ 8993506f2f.386 │           01ff938549.386            │
                        │     sec/op     │    sec/op     vs base               │
SourceUint64-32              2.102n ± 2%    2.069n ± 0%       ~ (p=0.021 n=20)
GlobalInt64-32               3.542n ± 2%    3.456n ± 1%  -2.44% (p=0.001 n=20)
GlobalInt64Parallel-32      0.3202n ± 0%   0.3252n ± 0%  +1.56% (p=0.000 n=20)
GlobalUint64-32              3.507n ± 1%    3.573n ± 1%  +1.87% (p=0.000 n=20)
GlobalUint64Parallel-32     0.3170n ± 1%   0.3159n ± 0%       ~ (p=0.167 n=20)
Int64-32                     2.516n ± 1%    2.562n ± 2%       ~ (p=0.016 n=20)
Uint64-32                    2.544n ± 1%    2.592n ± 0%  +1.85% (p=0.000 n=20)
GlobalIntN1000-32            6.237n ± 1%    6.266n ± 2%       ~ (p=0.268 n=20)
IntN1000-32                  4.670n ± 2%    4.724n ± 2%       ~ (p=0.644 n=20)
Int64N1000-32                5.412n ± 1%    5.490n ± 2%       ~ (p=0.159 n=20)
Int64N1e8-32                 5.414n ± 2%    5.513n ± 2%       ~ (p=0.129 n=20)
Int64N1e9-32                 5.473n ± 1%    5.476n ± 1%       ~ (p=0.723 n=20)
Int64N2e9-32                 5.487n ± 1%    5.501n ± 2%       ~ (p=0.481 n=20)
Int64N1e18-32                8.901n ± 2%    9.043n ± 2%       ~ (p=0.330 n=20)
Int64N2e18-32                9.521n ± 1%    9.601n ± 2%       ~ (p=0.703 n=20)
Int64N4e18-32                11.92n ± 1%    12.00n ± 1%       ~ (p=0.489 n=20)
Int32N1000-32                4.785n ± 1%    4.829n ± 2%       ~ (p=0.402 n=20)
Int32N1e8-32                 4.748n ± 1%    4.825n ± 2%       ~ (p=0.218 n=20)
Int32N1e9-32                 4.810n ± 1%    4.830n ± 2%       ~ (p=0.794 n=20)
Int32N2e9-32                 4.812n ± 1%    4.750n ± 2%       ~ (p=0.057 n=20)
Float32-32                   10.48n ± 4%    10.89n ± 4%       ~ (p=0.162 n=20)
Float64-32                   19.79n ± 3%    19.60n ± 4%       ~ (p=0.668 n=20)
ExpFloat64-32                12.91n ± 3%    12.96n ± 3%       ~ (p=1.000 n=20)
NormFloat64-32               7.462n ± 1%    7.516n ± 1%       ~ (p=0.051 n=20)
Perm3-32                     35.98n ± 2%    36.78n ± 2%       ~ (p=0.033 n=20)
Perm30-32                    241.5n ± 1%    238.9n ± 2%       ~ (p=0.126 n=20)
Perm30ViaShuffle-32          187.3n ± 2%    189.7n ± 2%       ~ (p=0.387 n=20)
ShuffleOverhead-32           160.2n ± 1%    159.8n ± 1%       ~ (p=0.256 n=20)
Concurrent-32                3.308n ± 3%    3.286n ± 1%       ~ (p=0.038 n=20)
PCG_DXSM-32                                 7.613n ± 1%

For #61716.

Change-Id: Icb274ca1f782504d658305a40159b4ae6a2f3f1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/502505
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Rob Pike <r@golang.org>
2023-10-30 17:09:23 +00:00
Russ Cox
f2e2637227 math/rand/v2: simplify Perm
The compiler says Perm is being inlined into BenchmarkPerm,
and yet BenchmarkPerm30ViaShuffle, which you'd think is the
same code, still runs significantly faster.

The benchmarks are mystifying but this is clearly still a step in
the right direction, since BenchmarkPerm30ViaShuffle is still
the fastest and we avoid having two copies of that logic.

goos: linux
goarch: amd64
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ e1bbe739fb.amd64 │           8993506f2f.amd64           │
                        │      sec/op      │    sec/op     vs base                │
SourceUint64-32                1.316n ± 2%    1.325n ± 1%        ~ (p=0.208 n=20)
GlobalInt64-32                 2.048n ± 1%    2.240n ± 1%   +9.38% (p=0.000 n=20)
GlobalInt64Parallel-32        0.1037n ± 1%   0.1041n ± 1%        ~ (p=0.774 n=20)
GlobalUint64-32                2.039n ± 2%    2.072n ± 3%        ~ (p=0.115 n=20)
GlobalUint64Parallel-32       0.1013n ± 1%   0.1008n ± 1%        ~ (p=0.417 n=20)
Int64-32                       1.692n ± 2%    1.716n ± 1%        ~ (p=0.122 n=20)
Uint64-32                      1.643n ± 2%    1.665n ± 1%        ~ (p=0.062 n=20)
GlobalIntN1000-32              3.287n ± 1%    3.335n ± 1%        ~ (p=0.147 n=20)
IntN1000-32                    2.678n ± 2%    2.484n ± 1%   -7.24% (p=0.000 n=20)
Int64N1000-32                  2.684n ± 2%    2.502n ± 2%   -6.80% (p=0.000 n=20)
Int64N1e8-32                   2.663n ± 2%    2.484n ± 2%   -6.76% (p=0.000 n=20)
Int64N1e9-32                   2.633n ± 1%    2.502n ± 0%   -4.98% (p=0.000 n=20)
Int64N2e9-32                   2.657n ± 1%    2.502n ± 0%   -5.87% (p=0.000 n=20)
Int64N1e18-32                  3.125n ± 2%    3.201n ± 1%   +2.43% (p=0.000 n=20)
Int64N2e18-32                  3.476n ± 1%    3.504n ± 1%   +0.83% (p=0.009 n=20)
Int64N4e18-32                  4.795n ± 1%    4.873n ± 1%        ~ (p=0.106 n=20)
Int32N1000-32                  2.485n ± 2%    2.639n ± 1%   +6.20% (p=0.000 n=20)
Int32N1e8-32                   2.457n ± 1%    2.686n ± 2%   +9.34% (p=0.000 n=20)
Int32N1e9-32                   2.452n ± 1%    2.636n ± 1%   +7.52% (p=0.000 n=20)
Int32N2e9-32                   2.453n ± 1%    2.660n ± 1%   +8.44% (p=0.000 n=20)
Float32-32                     2.254n ± 1%    2.261n ± 1%        ~ (p=0.888 n=20)
Float64-32                     2.262n ± 1%    2.280n ± 1%        ~ (p=0.040 n=20)
ExpFloat64-32                  3.777n ± 2%    3.891n ± 1%   +3.03% (p=0.000 n=20)
NormFloat64-32                 3.606n ± 1%    3.711n ± 1%   +2.91% (p=0.000 n=20)
Perm3-32                       33.12n ± 2%    32.60n ± 2%        ~ (p=0.045 n=20)
Perm30-32                      176.1n ± 1%    204.2n ± 0%  +15.96% (p=0.000 n=20)
Perm30ViaShuffle-32            109.3n ± 1%    121.7n ± 2%  +11.30% (p=0.000 n=20)
ShuffleOverhead-32             112.5n ± 1%    106.2n ± 2%   -5.56% (p=0.000 n=20)
Concurrent-32                  2.099n ± 0%    2.190n ± 5%   +4.36% (p=0.001 n=20)

goos: darwin
goarch: arm64
pkg: math/rand/v2
cpu: Apple M1
                       │ e1bbe739fb.arm64 │           8993506f2f.arm64           │
                       │      sec/op      │    sec/op     vs base                │
SourceUint64-8                2.290n ± 1%    2.271n ± 0%        ~ (p=0.015 n=20)
GlobalInt64-8                 2.180n ± 1%    2.161n ± 1%        ~ (p=0.180 n=20)
GlobalInt64Parallel-8        0.4294n ± 0%   0.4303n ± 0%   +0.19% (p=0.001 n=20)
GlobalUint64-8                2.170n ± 1%    2.164n ± 1%        ~ (p=0.673 n=20)
GlobalUint64Parallel-8       0.4283n ± 0%   0.4287n ± 0%        ~ (p=0.128 n=20)
Int64-8                       2.481n ± 1%    2.478n ± 1%        ~ (p=0.867 n=20)
Uint64-8                      2.464n ± 1%    2.460n ± 1%        ~ (p=0.763 n=20)
GlobalIntN1000-8              2.814n ± 0%    2.814n ± 2%        ~ (p=0.969 n=20)
IntN1000-8                    2.934n ± 2%    3.003n ± 2%   +2.35% (p=0.000 n=20)
Int64N1000-8                  2.957n ± 1%    2.954n ± 0%        ~ (p=0.285 n=20)
Int64N1e8-8                   2.935n ± 2%    2.956n ± 0%   +0.73% (p=0.002 n=20)
Int64N1e9-8                   2.935n ± 2%    3.325n ± 0%  +13.29% (p=0.000 n=20)
Int64N2e9-8                   2.933n ± 4%    2.956n ± 2%        ~ (p=0.163 n=20)
Int64N1e18-8                  3.781n ± 1%    3.780n ± 1%        ~ (p=0.805 n=20)
Int64N2e18-8                  4.362n ± 0%    4.385n ± 0%        ~ (p=0.077 n=20)
Int64N4e18-8                  6.576n ± 1%    6.527n ± 0%        ~ (p=0.024 n=20)
Int32N1000-8                  2.942n ± 2%    2.964n ± 1%        ~ (p=0.073 n=20)
Int32N1e8-8                   2.941n ± 1%    2.964n ± 1%        ~ (p=0.058 n=20)
Int32N1e9-8                   2.938n ± 2%    2.963n ± 2%   +0.87% (p=0.003 n=20)
Int32N2e9-8                   2.982n ± 2%    2.961n ± 2%        ~ (p=0.056 n=20)
Float32-8                     3.441n ± 0%    3.442n ± 0%        ~ (p=0.030 n=20)
Float64-8                     3.441n ± 0%    3.442n ± 0%   +0.03% (p=0.001 n=20)
ExpFloat64-8                  4.472n ± 0%    4.472n ± 0%        ~ (p=0.877 n=20)
NormFloat64-8                 4.716n ± 0%    4.734n ± 0%   +0.38% (p=0.000 n=20)
Perm3-8                       26.66n ± 0%    26.55n ± 0%   -0.39% (p=0.000 n=20)
Perm30-8                      143.3n ± 0%    181.9n ± 0%  +26.97% (p=0.000 n=20)
Perm30ViaShuffle-8            142.9n ± 0%    143.1n ± 0%        ~ (p=0.669 n=20)
ShuffleOverhead-8             121.1n ± 1%    120.6n ± 1%   -0.41% (p=0.004 n=20)
Concurrent-8                  2.379n ± 2%    2.357n ± 2%        ~ (p=0.337 n=20)

goos: linux
goarch: 386
pkg: math/rand/v2
cpu: AMD Ryzen 9 7950X 16-Core Processor
                        │ e1bbe739fb.386 │            8993506f2f.386            │
                        │     sec/op     │    sec/op     vs base                │
SourceUint64-32              2.087n ± 1%    2.102n ± 2%        ~ (p=0.507 n=20)
GlobalInt64-32               3.538n ± 2%    3.542n ± 2%        ~ (p=0.425 n=20)
GlobalInt64Parallel-32      0.3207n ± 1%   0.3202n ± 0%        ~ (p=0.963 n=20)
GlobalUint64-32              3.543n ± 1%    3.507n ± 1%        ~ (p=0.034 n=20)
GlobalUint64Parallel-32     0.3170n ± 0%   0.3170n ± 1%        ~ (p=0.920 n=20)
Int64-32                     2.548n ± 1%    2.516n ± 1%        ~ (p=0.139 n=20)
Uint64-32                    2.565n ± 2%    2.544n ± 1%        ~ (p=0.394 n=20)
GlobalIntN1000-32            6.300n ± 1%    6.237n ± 1%        ~ (p=0.029 n=20)
IntN1000-32                  4.750n ± 0%    4.670n ± 2%        ~ (p=0.034 n=20)
Int64N1000-32                5.515n ± 2%    5.412n ± 1%   -1.86% (p=0.009 n=20)
Int64N1e8-32                 5.527n ± 0%    5.414n ± 2%   -2.05% (p=0.002 n=20)
Int64N1e9-32                 5.531n ± 2%    5.473n ± 1%        ~ (p=0.047 n=20)
Int64N2e9-32                 5.514n ± 2%    5.487n ± 1%        ~ (p=0.298 n=20)
Int64N1e18-32                9.059n ± 1%    8.901n ± 2%        ~ (p=0.037 n=20)
Int64N2e18-32                9.594n ± 1%    9.521n ± 1%        ~ (p=0.051 n=20)
Int64N4e18-32                12.05n ± 2%    11.92n ± 1%        ~ (p=0.357 n=20)
Int32N1000-32                4.840n ± 2%    4.785n ± 1%        ~ (p=0.189 n=20)
Int32N1e8-32                 4.832n ± 2%    4.748n ± 1%        ~ (p=0.042 n=20)
Int32N1e9-32                 4.815n ± 2%    4.810n ± 1%        ~ (p=0.878 n=20)
Int32N2e9-32                 4.813n ± 1%    4.812n ± 1%        ~ (p=0.542 n=20)
Float32-32                   10.90n ± 2%    10.48n ± 4%   -3.85% (p=0.007 n=20)
Float64-32                   20.32n ± 4%    19.79n ± 3%        ~ (p=0.553 n=20)
ExpFloat64-32                12.95n ± 3%    12.91n ± 3%        ~ (p=0.909 n=20)
NormFloat64-32               7.570n ± 1%    7.462n ± 1%   -1.44% (p=0.004 n=20)
Perm3-32                     37.80n ± 2%    35.98n ± 2%   -4.79% (p=0.000 n=20)
Perm30-32                    214.0n ± 1%    241.5n ± 1%  +12.85% (p=0.000 n=20)
Perm30ViaShuffle-32          188.7n ± 2%    187.3n ± 2%        ~ (p=0.029 n=20)
ShuffleOverhead-32           160.8n ± 1%    160.2n ± 1%        ~ (p=0.180 n=20)
Concurrent-32                3.288n ± 0%    3.308n ± 3%        ~ (p=0.037 n=20)

For #61716.

Change-Id: I342b611456c3569520d3c91c849d29eba325d87e
Reviewed-on: https://go-review.googlesource.com/c/go/+/502504
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Rob Pike <r@golang.org>
2023-10-30 17:09:21 +00:00