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Commit Graph

59214 Commits

Author SHA1 Message Date
Michael Pratt
5dceddfe7c runtime: use channels in gcBgMarkStartWorkers
gcBgMarkStartWorkers currently starts workers one at a time, using a
note to communicate readiness back from the worker.

However, this is a pretty standard goroutine, so we can just use a
channel to communicate between the goroutines.

In addition to being conceptually simpler, using channels has the
additional advantage of coordinating with the scheduler. Notes use OS
locks and sleep the entire thread, requiring other threads to run the
other goroutines. Waiting on a channel allows the scheduler to directly
run another goroutine. When the worker sends to the channel, the
scheduler can use runnext to run gcBgMarkStartWorker immediately,
reducing latency.

We could additionally batch start all workers and then wait only once,
however this would defeate runnext switching between the workers and
gcBgMarkStartWorkers, so in a heavily loaded system, we expect the
direct switches to reduce latency.

Change-Id: Iedf0d2ad8ad796b43fd8d32ccb1e815cfe010cb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/558535
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2024-01-26 16:28:17 +00:00
Robert Griesemer
8e02e7b26a go/types, types2: use existing case-insensitive lookup (remove TODO)
Rather than implementing a new, less complete mechanism to check
if a selector exists with different capitalization, use the
existing mechanism in lookupFieldOrMethodImpl by making it
available for internal use.

Pass foldCase parameter all the way trough to Object.sameId and
thus make it consistently available where Object.sameId is used.

From sameId, factor out samePkg functionality into stand-alone
predicate.

Do better case distinction when reporting an error for an undefined
selector expression.

Cleanup.

Change-Id: I7be3cecb4976a4dce3264c7e0c49a320c87101e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/558315
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2024-01-26 14:04:26 +00:00
Russ Cox
d278d5bbdd all: enable range-over-func in Go 1.23
GOEXPERIMENT=rangefunc still enables it for all Go modules.
Otherwise only enable in Go 1.23 source files.
More work remains but it will be done in follow-up issues.

Fixes #61405.

Change-Id: Icad64942deb152ee65444e4d7be289814a8a0b6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/557835
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2024-01-26 04:31:42 +00:00
Russ Cox
3dcdc09c85 maps: correct use of linkname
Linkname should have uses at both ends,
and then no fake assembly file is needed.

Change-Id: Ia2066be7b1e08d71a6db622d2a167f1b09cb7d9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/558297
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-01-26 04:31:27 +00:00
Meng Zhuo
09ed9a6585 cmd/compile: implement float min/max in hardware for riscv64
CL 514596 adds float min/max for amd64, this CL adds it for riscv64.

The behavior of the RISC-V FMIN/FMAX instructions almost match Go's
requirements.

However according to RISCV spec 8.3 "NaN Generation and Propagation"
>> if at least one input is a signaling NaN, or if both inputs are quiet
>> NaNs, the result is the canonical NaN. If one operand is a quiet NaN
>> and the other is not a NaN, the result is the non-NaN operand.

Go using quiet NaN as NaN and according to Go spec
>> if any argument is a NaN, the result is a NaN

This requires the float min/max implementation to check whether one
of operand is qNaN before float mix/max actually execute.

This CL also fix a typo in minmax test.

Benchmark on Visionfive2
goos: linux
goarch: riscv64
pkg: runtime
         │ float_minmax.old.bench │       float_minmax.new.bench        │
         │         sec/op         │   sec/op     vs base                │
MinFloat             158.20n ± 0%   28.13n ± 0%  -82.22% (p=0.000 n=10)
MaxFloat             158.10n ± 0%   28.12n ± 0%  -82.21% (p=0.000 n=10)
geomean               158.1n        28.12n       -82.22%

Update #59488

Change-Id: Iab48be6d32b8882044fb8c821438ca8840e5493d
Reviewed-on: https://go-review.googlesource.com/c/go/+/514775
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Run-TryBot: M Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
2024-01-26 01:41:50 +00:00
Robert Griesemer
bdb0a1abfc go/types, types2: in struct processing, set name position in types2
As a consequence, the positions needed by the Checker.structType
internal helper functions add and addInvalid are always the positions
of the provided identifiers, and we can leave away the extra position
arguments.

Change-Id: Iddc275c83d3781261476b8e1903050e0a049957c
Reviewed-on: https://go-review.googlesource.com/c/go/+/558316
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
2024-01-25 23:27:39 +00:00
Michael Anthony Knyszek
5c7c24ce82 internal/testenv: support the LUCI mobile builders in tests
This change updates the testenv tests to correctly match on future LUCI
builder names for mobile builders. This isn't a problem today because
those haven't been set up yet, but the builder names are structured and
it's clear where the modifiers will appear. Might as well set them up
now.

Change-Id: I244b88a62a90312c0f3ff2360527d58531070362
Reviewed-on: https://go-review.googlesource.com/c/go/+/558597
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-25 23:12:44 +00:00
Michael Anthony Knyszek
93f0c0b25e internal/testenv: allow "-noopt" anywhere in builder name in test
testenv's TestHasGoBuild test is supposed to allow noopt builders to not
have go build, but the pattern match is failing on the LUCI builders
where a test shard might have an additional "-test_only" suffix in the
builder name. Furthermore, in the LUCI world, "run mods" (the builder
type suffixes) are supposed to be well-defined and composable, so it
doesn't make sense to restrict "-noopt" to the builder suffix anyway.

This change modifies the test to allow "-noopt" to appear anywhere in
the builder name when checking if it's running on a noopt builder.

Change-Id: I393818e3e8e452c7b0927cbc65726d552aa8ff8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/558596
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
2024-01-25 22:04:33 +00:00
Cosmos Nicolaou
9312f47d0a runtime/pprof: fix retry logic introduced by #858cd8d
The previous attempt to fix this flake was incorrect in that it
examined the vmmap output rather than the detailed error
output for the 'resource shortage' message that triggers the
retry, and hence failed to retry. This PR looks at the
detailed error output.

Fixes #62352

Change-Id: I4218b187528a95842556dc1ea27947ffcbfbc497
Reviewed-on: https://go-review.googlesource.com/c/go/+/558575
Auto-Submit: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2024-01-25 20:51:58 +00:00
Zxilly
6a861010be debug/gosym: add detailed doc for text argument in NewLineTable
Fixes #65232

Change-Id: I9ef76355cec4bea2d77811a69c61c1806c486be8
GitHub-Last-Rev: 9c617b65be
GitHub-Pull-Request: golang/go#65263
Reviewed-on: https://go-review.googlesource.com/c/go/+/557957
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Reviewed-by: Carlos Amedee <carlos@golang.org>
2024-01-25 19:43:24 +00:00
Lynn Boger
4fde3ef2ac math/big,crypto/internal/bigmod: unroll loop in addMulVVW for ppc64x
This updates the assembly implementation of AddMulVVW to
unroll the main loop to do 64 bytes at a time.

The code for addMulVVWx is based on the same code and has
also been updated to improve performance.

goos: linux
goarch: ppc64le
pkg: crypto/internal/bigmod
cpu: POWER10
               │ bg.orig.out │               bg.out               │
               │   sec/op    │   sec/op     vs base               │
ModAdd           116.3n ± 0%   116.9n ± 0%   +0.52% (p=0.002 n=6)
ModSub           111.5n ± 0%   111.5n ± 0%    0.00% (p=0.273 n=6)
MontgomeryRepr   2.195µ ± 0%   1.944µ ± 0%  -11.44% (p=0.002 n=6)
MontgomeryMul    2.195µ ± 0%   1.943µ ± 0%  -11.48% (p=0.002 n=6)
ModMul           4.418µ ± 0%   3.900µ ± 0%  -11.72% (p=0.002 n=6)
ExpBig           5.736m ± 0%   5.117m ± 0%  -10.78% (p=0.002 n=6)
Exp              5.891m ± 0%   5.237m ± 0%  -11.11% (p=0.002 n=6)
geomean          9.901µ        9.094µ        -8.15%


goos: linux
goarch: ppc64le
pkg: math/big
cpu: POWER10
                 │ am.orig.out  │               am.out               │
                 │    sec/op    │   sec/op     vs base               │
AddMulVVW/1         4.456n ± 1%   3.565n ± 0%  -20.00% (p=0.002 n=6)
AddMulVVW/2         4.875n ± 1%   5.938n ± 1%  +21.79% (p=0.002 n=6)
AddMulVVW/3         5.484n ± 0%   5.693n ± 0%   +3.80% (p=0.002 n=6)
AddMulVVW/4         6.370n ± 0%   6.065n ± 0%   -4.79% (p=0.002 n=6)
AddMulVVW/5         7.321n ± 0%   7.188n ± 0%   -1.82% (p=0.002 n=6)
AddMulVVW/10        12.26n ± 8%   11.41n ± 0%   -6.97% (p=0.002 n=6)
AddMulVVW/100      100.70n ± 0%   93.58n ± 0%   -7.08% (p=0.002 n=6)
AddMulVVW/1000      938.6n ± 0%   845.5n ± 0%   -9.92% (p=0.002 n=6)
AddMulVVW/10000     9.459µ ± 0%   8.415µ ± 0%  -11.04% (p=0.002 n=6)
AddMulVVW/100000    94.57µ ± 0%   84.01µ ± 0%  -11.16% (p=0.002 n=6)
geomean             75.17n        71.21n        -5.27%


Change-Id: Idd79f5f02387564f4c2cc28d50b1c12bcd9a400f
Reviewed-on: https://go-review.googlesource.com/c/go/+/557915
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Paul Murphy <murp@ibm.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Reviewed-by: Carlos Amedee <carlos@golang.org>
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
2024-01-25 19:32:43 +00:00
kayos@tcp.direct
67d30fc315 net/http: wrap client errors
Fixes #50856

Change-Id: I7fe89fcce223e1571debb73436f8aeb3bfbe4b9f
GitHub-Last-Rev: be570e7883
GitHub-Pull-Request: golang/go#63448
Reviewed-on: https://go-review.googlesource.com/c/go/+/533119
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-01-25 15:53:12 +00:00
Joel Sing
c51beb4342 cmd/dist,internal/platform,runtime: add cgo support for openbsd/riscv64 port
Updates #55999

Change-Id: Ie9a030130713f3eaf789b91d9033be3335eb9d75
Reviewed-on: https://go-review.googlesource.com/c/go/+/518630
Reviewed-by: Carlos Amedee <carlos@golang.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
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2024-01-25 09:19:16 +00:00
Joel Sing
fee3f537b4 cmd/dist,internal/platform: enable openbsd/riscv64 port
Fixes #55999

Change-Id: If76b61b660db3fefe5f9ca97500782f2a650db25
Reviewed-on: https://go-review.googlesource.com/c/go/+/518629
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
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2024-01-25 09:18:51 +00:00
Mauri de Souza Meneguzzo
cad6629144 runtime: add crash stack support for s390x
Change-Id: Ie923f7bbe5ef22e381ae4f421387fbd570622a28
GitHub-Last-Rev: f8f2163502
GitHub-Pull-Request: golang/go#63908
Reviewed-on: https://go-review.googlesource.com/c/go/+/539296
Run-TryBot: Joel Sing <joel@sing.id.au>
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Reviewed-by: Joel Sing <joel@sing.id.au>
2024-01-25 09:18:28 +00:00
Tobias Klauser
2c35def7ef net/netip: use Addr.appendTo4In6 in Addr.AppendTo
Change-Id: Ieb1931c40b37b87fc7d0011461d9f583e73aaff9
Reviewed-on: https://go-review.googlesource.com/c/go/+/557778
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
2024-01-24 22:27:20 +00:00
Tobias Klauser
4f4d6508b9 net/netip: optimize Addr.String for 4in6 addresses
name                      old time/op    new time/op    delta
AddrString/v4-8             20.0ns ± 0%    19.7ns ± 1%   -1.42%  (p=0.000 n=9+10)
AddrString/v6-8             58.9ns ± 6%    57.1ns ± 0%   -3.08%  (p=0.000 n=10+9)
AddrString/v6_ellipsis-8    59.9ns ± 1%    59.5ns ± 0%   -0.53%  (p=0.027 n=8+10)
AddrString/v6_v4-8          33.7ns ± 1%    24.3ns ± 0%  -27.82%  (p=0.000 n=9+10)
AddrString/v6_zone-8        61.4ns ± 1%    61.6ns ± 0%     ~     (p=0.190 n=9+9)

name                      old alloc/op   new alloc/op   delta
AddrString/v4-8              16.0B ± 0%     16.0B ± 0%     ~     (all equal)
AddrString/v6-8              48.0B ± 0%     48.0B ± 0%     ~     (all equal)
AddrString/v6_ellipsis-8     24.0B ± 0%     24.0B ± 0%     ~     (all equal)
AddrString/v6_v4-8           24.0B ± 0%     24.0B ± 0%     ~     (all equal)
AddrString/v6_zone-8         24.0B ± 0%     24.0B ± 0%     ~     (all equal)

name                      old allocs/op  new allocs/op  delta
AddrString/v4-8               1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrString/v6-8               1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrString/v6_ellipsis-8      1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrString/v6_v4-8            1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrString/v6_zone-8          1.00 ± 0%      1.00 ± 0%     ~     (all equal)

Change-Id: Ie611ee8629a2ff457dcff83b08d0c94c93af3182
Reviewed-on: https://go-review.googlesource.com/c/go/+/557777
Reviewed-by: Damien Neil <dneil@google.com>
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2024-01-24 22:27:18 +00:00
Tobias Klauser
700edbf73e net/netip: optimize Addr.MarshalText allocation for 4in6 addresses
name                           old time/op    new time/op    delta
AddrMarshalText/v4-8             18.5ns ± 1%    18.8ns ± 1%   +1.40%  (p=0.000 n=9+10)
AddrMarshalText/v6-8             58.0ns ± 0%    57.5ns ± 0%   -0.93%  (p=0.000 n=9+10)
AddrMarshalText/v6_ellipsis-8    61.4ns ± 0%    60.4ns ± 0%   -1.65%  (p=0.000 n=10+9)
AddrMarshalText/v6_v4-8          25.7ns ± 0%    26.2ns ± 1%   +1.86%  (p=0.000 n=10+10)
AddrMarshalText/v6_zone-8        61.8ns ± 0%    60.8ns ± 0%   -1.63%  (p=0.000 n=10+9)

name                           old alloc/op   new alloc/op   delta
AddrMarshalText/v4-8              16.0B ± 0%     16.0B ± 0%     ~     (all equal)
AddrMarshalText/v6-8              48.0B ± 0%     48.0B ± 0%     ~     (all equal)
AddrMarshalText/v6_ellipsis-8     48.0B ± 0%     48.0B ± 0%     ~     (all equal)
AddrMarshalText/v6_v4-8           48.0B ± 0%     32.0B ± 0%  -33.33%  (p=0.000 n=10+10)
AddrMarshalText/v6_zone-8         48.0B ± 0%     48.0B ± 0%     ~     (all equal)

name                           old allocs/op  new allocs/op  delta
AddrMarshalText/v4-8               1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrMarshalText/v6-8               1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrMarshalText/v6_ellipsis-8      1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrMarshalText/v6_v4-8            1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrMarshalText/v6_zone-8          1.00 ± 0%      1.00 ± 0%     ~     (all equal)

Change-Id: Ib298a0fb9ec6b55e37d0559dad387242dc82aab9
Reviewed-on: https://go-review.googlesource.com/c/go/+/557776
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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2024-01-24 22:27:15 +00:00
Tobias Klauser
b495ddbe13 net/netip: further optimize AddrPort.String
name                          old time/op    new time/op    delta
AddrPortString/v4-8             29.0ns ± 0%    28.2ns ± 1%   -2.74%  (p=0.000 n=8+9)
AddrPortString/v6-8             96.0ns ± 0%    65.1ns ± 0%  -32.22%  (p=0.000 n=10+10)
AddrPortString/v6_ellipsis-8    98.5ns ± 0%    68.0ns ± 1%  -30.95%  (p=0.000 n=10+10)
AddrPortString/v6_v4-8          71.8ns ± 1%    33.9ns ± 0%  -52.88%  (p=0.000 n=10+10)
AddrPortString/v6_zone-8        98.5ns ± 0%    68.6ns ± 0%  -30.35%  (p=0.000 n=8+9)

name                          old alloc/op   new alloc/op   delta
AddrPortString/v4-8              24.0B ± 0%     24.0B ± 0%     ~     (all equal)
AddrPortString/v6-8              96.0B ± 0%     48.0B ± 0%  -50.00%  (p=0.000 n=10+10)
AddrPortString/v6_ellipsis-8     56.0B ± 0%     32.0B ± 0%  -42.86%  (p=0.000 n=10+10)
AddrPortString/v6_v4-8           56.0B ± 0%     32.0B ± 0%  -42.86%  (p=0.000 n=10+10)
AddrPortString/v6_zone-8         56.0B ± 0%     32.0B ± 0%  -42.86%  (p=0.000 n=10+10)

name                          old allocs/op  new allocs/op  delta
AddrPortString/v4-8               1.00 ± 0%      1.00 ± 0%     ~     (all equal)
AddrPortString/v6-8               2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=10+10)
AddrPortString/v6_ellipsis-8      2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=10+10)
AddrPortString/v6_v4-8            2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=10+10)
AddrPortString/v6_zone-8          2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=10+10)

Change-Id: Iae077c5c80db3d236d7ec9a02d20a96b0e3a96e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/557775
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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2024-01-24 22:25:08 +00:00
Andy Pan
6674f2225e net: verify if internal/poll.Splice has been called during io.Copy
Change-Id: I29ef35b034cd4ec401ac502bf95dbd8c3ef2a2d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/552535
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Reviewed-by: Damien Neil <dneil@google.com>
2024-01-24 22:13:22 +00:00
Robert Griesemer
e85968670e go/types, types2: better error msg when type inference fails in a call
In Checker.infer, report an error through an (incoming) *error_
so that the error can be reported as desired where infer is called.
Checker.infer is now a pure function.

Fixes #60543.

At call sites of Checker.infer, pass in an *error_ and use it to
report inference errors, together with additional information as
desired.

Fixes #60542.

In go/types, in error_.errorf, pass in a positioner rather than
a token.Pos. Also, introduce noposn, the positioner equivalent
for nopos. Adjust call sites as needed.

Change-Id: I462a7899a77a8bee2a21ba88299df237d74e0672
Reviewed-on: https://go-review.googlesource.com/c/go/+/558035
Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2024-01-24 21:28:05 +00:00
Cherry Mui
02a0927786 doc/go1.22: remove archive/tar.FileInfoNames
CL 514235 is reverted.

Updates #65245.
Updates #61422.

Change-Id: Ib5d2e16c982ab25c8a87af2bdaee8568446cf599
Reviewed-on: https://go-review.googlesource.com/c/go/+/557840
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2024-01-24 20:57:42 +00:00
Cherry Mui
5000b51680 Revert "archive/tar: add FileInfoNames interface"
This reverts CL 514235. Also reverts CL 518056 which is a followup
fix.

Reason for revert: Proposal #50102 defined an interface that is
too specific to UNIX-y systems and also didn't make much sense.
The proposal is un-accepted, and we'll revisit in Go 1.23.

Fixes (via backport) #65245.
Updates #50102.

Change-Id: I41ba0ee286c1d893e6564a337e5d76418d19435d
Reviewed-on: https://go-review.googlesource.com/c/go/+/558295
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-01-24 20:54:27 +00:00
Bryan C. Mills
749ebaa446 net: ignore Dial errors in TestAcceptTimeout
Also use DialContext instead of just Dial so that we can ensure
the call returns before we close the listener.

The Dial in this test is intended to complete before the call to
Accept, but there is no synchronization to ensure that and sometimes
it doesn't happen. That's ok and mostly immaterial to the test, but it
does mean we need to ignore Dial errors (which can happen when the
listener is closed), and we need to be a little more careful about not
dialing a port that may have already been reused by some other test.

Fixes #65240.
Updates #17948.

Change-Id: Ife1b5c3062939441b58f4c096461bf5d7841889b
Reviewed-on: https://go-review.googlesource.com/c/go/+/558175
Reviewed-by: Damien Neil <dneil@google.com>
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2024-01-24 18:06:55 +00:00
Jes Cok
3330c69476 reflect: fix isRegularMemory at case Array
To match cmd/compile/internal/compare.IsRegularMemory,
this CL adds code for empty arrays of comparable element type.

Change-Id: I205fb9bfda60be6c9aac2d9098ed3f0eb51cd0fa
GitHub-Last-Rev: 40db7ed510
GitHub-Pull-Request: golang/go#65252
Reviewed-on: https://go-review.googlesource.com/c/go/+/558155
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: qiulaidongfeng <2645477756@qq.com>
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2024-01-24 16:55:23 +00:00
Jonathan Amsterdam
6037c8a877 doc/next: initial contents
Initialize the doc/next directory for the next release by copying the
contents of doc/initial into it.

Also, rewrite doc/README.md to add release instructions and to separate
information for developers from information for the release team.

Change-Id: Ie1e5c2ddae7a8d301e9b2f8a68925519648aa84d
Reviewed-on: https://go-review.googlesource.com/c/go/+/557535
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Reviewed-by: Jonathan Amsterdam <jba@google.com>
2024-01-24 16:44:53 +00:00
Mauri de Souza Meneguzzo
66b776b025 runtime: short path for equal pointers in arm64 memequal
If memequal is invoked with the same pointers as arguments it ends up
comparing the whole memory contents, instead of just comparing the pointers.

This effectively makes an operation that could be O(1) into O(n). All the
other architectures already have this optimization in place. For
instance, arm64 also have it, in memequal_varlen.

Such optimization is very specific, one case that it will probably benefit is
programs that rely heavily on interning of strings.

goos: darwin
goarch: arm64
pkg: bytes
                 │      old.txt       │               new.txt                │
                 │       sec/op       │    sec/op     vs base                │
Equal/same/1-8           2.678n ± ∞ ¹   2.400n ± ∞ ¹   -10.38% (p=0.008 n=5)
Equal/same/6-8           3.267n ± ∞ ¹   2.431n ± ∞ ¹   -25.59% (p=0.008 n=5)
Equal/same/9-8           2.981n ± ∞ ¹   2.385n ± ∞ ¹   -19.99% (p=0.008 n=5)
Equal/same/15-8          2.974n ± ∞ ¹   2.390n ± ∞ ¹   -19.64% (p=0.008 n=5)
Equal/same/16-8          2.983n ± ∞ ¹   2.380n ± ∞ ¹   -20.21% (p=0.008 n=5)
Equal/same/20-8          3.567n ± ∞ ¹   2.384n ± ∞ ¹   -33.17% (p=0.008 n=5)
Equal/same/32-8          3.568n ± ∞ ¹   2.385n ± ∞ ¹   -33.16% (p=0.008 n=5)
Equal/same/4K-8         78.040n ± ∞ ¹   2.378n ± ∞ ¹   -96.95% (p=0.008 n=5)
Equal/same/4M-8      78713.000n ± ∞ ¹   2.385n ± ∞ ¹  -100.00% (p=0.008 n=5)
Equal/same/64M-8   1348095.000n ± ∞ ¹   2.381n ± ∞ ¹  -100.00% (p=0.008 n=5)
geomean                  43.52n         2.390n         -94.51%
¹ need >= 6 samples for confidence interval at level 0.95

                 │    old.txt    │                     new.txt                      │
                 │      B/s      │         B/s          vs base                     │
Equal/same/1-8     356.1Mi ± ∞ ¹         397.3Mi ± ∞ ¹        +11.57% (p=0.008 n=5)
Equal/same/6-8     1.711Gi ± ∞ ¹         2.298Gi ± ∞ ¹        +34.35% (p=0.008 n=5)
Equal/same/9-8     2.812Gi ± ∞ ¹         3.515Gi ± ∞ ¹        +24.99% (p=0.008 n=5)
Equal/same/15-8    4.698Gi ± ∞ ¹         5.844Gi ± ∞ ¹        +24.41% (p=0.008 n=5)
Equal/same/16-8    4.995Gi ± ∞ ¹         6.260Gi ± ∞ ¹        +25.34% (p=0.008 n=5)
Equal/same/20-8    5.222Gi ± ∞ ¹         7.814Gi ± ∞ ¹        +49.63% (p=0.008 n=5)
Equal/same/32-8    8.353Gi ± ∞ ¹        12.496Gi ± ∞ ¹        +49.59% (p=0.008 n=5)
Equal/same/4K-8    48.88Gi ± ∞ ¹       1603.96Gi ± ∞ ¹      +3181.17% (p=0.008 n=5)
Equal/same/4M-8    49.63Gi ± ∞ ¹    1637911.85Gi ± ∞ ¹   +3300381.91% (p=0.008 n=5)
Equal/same/64M-8   46.36Gi ± ∞ ¹   26253069.97Gi ± ∞ ¹  +56626517.99% (p=0.008 n=5)
geomean            6.737Gi               122.7Gi            +1721.01%
¹ need >= 6 samples for confidence interval at level 0.95

Fixes #64381

Change-Id: I7d423930a688edd88c4ba60d45e097296d9be852
GitHub-Last-Rev: ae8189fafb
GitHub-Pull-Request: golang/go#64419
Reviewed-on: https://go-review.googlesource.com/c/go/+/545416
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2024-01-24 16:07:25 +00:00
Jonathan Amsterdam
8b23b7b042 src/cmd/relnote, doc/next: add release note check
Add a test that every file in api/next has corresponding
release note fragments.

Vendor in golang.org/x/build/relnote, which brings along some other
things.

Modify dist/test.go to configure the test to run on some trybots.

For #64169.

Change-Id: If87d11350ea6b2605bc3ab31c491fa28f1d6ee7d
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/556995
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-01-24 13:01:26 +00:00
Mark Ryan
b4e7d630bc cmd/go: add GORISCV64 environment variable
The variable represents the RISC-V user-mode application profile for
which to compile.  Valid values are rva20u64 (the default) and
rva22u64.

Setting GORISCV64=rva20u64 defines the riscv64.rva20u64 build tag,
sets the internal variable buildcfg.GORISCV64 to 20 and defines the
macro GORISCV64_rva20u64 for use in assembly language code.

Setting GORISCV64=rva22u64 defines the riscv64.rva20u64 and
riscv64.rva22u64 build tags, sets the internal variable
buildcfg.GORISCV64 to 22 and defines the macro GORISCV64_rva22u64
for use in assembly language code.

This patch only provides a mechanism for the compiler and hand-coded
assembly language functions to take advantage of the RISC-V
extensions mandated by the application profiles.  Further patches
will be required to get the compiler/assembler and assembly language
functions to actually generate and use these extensions.

Fixes #61476

Change-Id: I9195ae6ee71703cd2112160e89157ab63b8391af
Reviewed-on: https://go-review.googlesource.com/c/go/+/541135
Reviewed-by: M Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
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2024-01-24 07:25:25 +00:00
apocelipes
b3acaa8230 cmd/go/internal/str,cmd/go/internal/work: remove redundant Contains
"cmd/go/internal/str.Contains" does the same thing as the "slices.Contains".

The name "str.Contains" is also easily confused with "strings.Contains".

Given that the slices package is already used in the package,
replace "str.Contains" with "slices.Contains".

"str.Contains" is no longer used so just remove it.

Change-Id: I80572464bd17d4a60e7ff41db3a77c4d0bd03fa3
GitHub-Last-Rev: e74d333f0f
GitHub-Pull-Request: golang/go#64136
Reviewed-on: https://go-review.googlesource.com/c/go/+/542416
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Bryan Mills <bcmills@google.com>
2024-01-23 20:08:07 +00:00
qmuntal
9368ced755 net,internal/poll: load ws2_32.dll only when net is imported
On Windows, ws2_32.dll is loaded and WSA initialized even if websockets
are not used.

This CL delays loading of ws2_32.dll and starting WSA until net is
initialized.

Change-Id: I07ea8241d79709cd4e80d29ba0d792c7444bbfe9
Reviewed-on: https://go-review.googlesource.com/c/go/+/557015
Reviewed-by: Bryan Mills <bcmills@google.com>
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2024-01-23 18:57:32 +00:00
Russ Cox
4085a4893c net: move cgo-using darwin test to separate package
It is a goal / requirement that nothing in the standard library
on darwin require cgo, and this test-only file makes net use
cgo on darwin. Move it elsewhere.

Change-Id: I6c11a8391d3913f73ce0098ba63b29adf5864f93
Reviewed-on: https://go-review.googlesource.com/c/go/+/549255
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
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2024-01-23 18:09:52 +00:00
Russ Cox
76b8bec6db cmd/go: add test case for issue 64738
The straight revert in CL 551215 fixed this issue.
Add a test case to make sure we don't reintroduce it.

Test case copied from CL 550237 (by bcmills).

Fixes #64738.

Change-Id: I9654a1fd46fe1a1cc63ee6645a552ec21d720ad0
Reviewed-on: https://go-review.googlesource.com/c/go/+/551255
Reviewed-by: Michael Matloob <matloob@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
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2024-01-23 18:08:32 +00:00
Bryan C. Mills
1a07550962 net: unskip and attempt to deflake TestAcceptTimeout
This test has been unconditionally skipped for over five years.
It may be that whatever was causing it to flake has been fixed.
And if it hasn't been fixed, it isn't providing any value.
Let's unskip it for the Go 1.23 development cycle and see what happens.

Let's also use a separate listener for each test case, so that a
leaked Dial goroutine from one case won't interfere with the other.

Fixes #17948 (maybe).

Change-Id: I239f22ca5d5a44388b9aa0ed4d81e451c6342617
Reviewed-on: https://go-review.googlesource.com/c/go/+/548940
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2024-01-23 17:46:06 +00:00
qiulaidongfeng
ed18d85ad7 internal/reflectlite: delete TODO pass safe to packEface don't need to copy if safe==true
reflect on the https://go-review.googlesource.com/c/go/+/548436
delete TODO the same.

Change-Id: I5b278cbfcb4108e5ffb332ba82dafb1eaa2bd6b2
GitHub-Last-Rev: cfc3950908
GitHub-Pull-Request: golang/go#64628
Reviewed-on: https://go-review.googlesource.com/c/go/+/548615
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2024-01-23 17:20:01 +00:00
qiulaidongfeng
8c45dddd5d reflect: delete TODO pass safe to packEface don't need to copy if safe==true
valueInterface not copy result in the follow incorrect behavior
w1.  x := ValueOf(&v).Elem()
r1.  iface := Value.Interface()
w2.  x.Set() or x.SetT()

The write operation of W2 will be observed by the read operation of r1,
but the existing behavior is not.

The valueInterface in deepValueEqual can, in theory, pass safe==true to not copy the object,
but there is no benchmark to indicate that the memory allocation has changed,
maybe we don't actually need safe==true here.

Change-Id: I55c423fd50adac8822a7fdbfe67af89ee223eace
GitHub-Last-Rev: 4a63867098
GitHub-Pull-Request: golang/go#64618
Reviewed-on: https://go-review.googlesource.com/c/go/+/548436
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2024-01-23 17:19:58 +00:00
Bryan C. Mills
f75e1c1460 net: report timeouts more aggressively in Accept in the fake implementation
This ensures that if the listener has already timed out when Accept
is called, Accept always returns an error instead of instantaneously
accepting a connection that was already pending.

For #17948.

Change-Id: Iabef7121590df3dcc2fe428429d7c2bc2bcb6cd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/557438
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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2024-01-23 17:05:09 +00:00
qmuntal
d0dc93c8e1 runtime,internal/poll: move websocket handling out of the runtime on Windows
On Windows, the netpoll is currently coupled with the websocket usage
in the internal/poll package.

This CL moves the websocket handling out of the runtime and puts it into
the internal/poll package, which already contains most of the async I/O
logic for websockets.

This is a good refactor per se, as the Go runtime shouldn't know about
websockets. In addition, it will make it easier (in a future CL) to only
load ws2_32.dll when the Go program actually uses websockets.

Change-Id: Ic820872cf9bdbbf092505ed7f7504edb6687735e
Reviewed-on: https://go-review.googlesource.com/c/go/+/556936
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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2024-01-23 15:36:19 +00:00
Rob Pike
704401ffa0 fmt: don't pad strings with zeros
It's what the documentation says, and oddly it already behaves correctly
for right padding, not left. (We never pad with zeros on the right.)

Just don't do it.

Fixes #56486

Change-Id: I2465edea93c69084e33bee0d945d5a1b85e6cd14
Reviewed-on: https://go-review.googlesource.com/c/go/+/555776
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-01-23 08:29:53 +00:00
qmuntal
adead1a93f cmd/cgo/internal/test: skip TestCallbackCallersSEH when internal linking
TestCallbackCallersSEH is flaky when using the internal linker. Skip
it for now until the flakiness is resolved.

Updates #65116

Change-Id: I7628b07eaff8be00757d5604722f30aede25fce5
Reviewed-on: https://go-review.googlesource.com/c/go/+/556635
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-23 06:52:00 +00:00
qiulaidongfeng
7611d2e610 cmd/compile/internal/ssagen,runtime: merge trace consts into internal/abi
For #59670

Change-Id: Iec85ee7312bb566b3f1224424f7d27bf4e408b13
GitHub-Last-Rev: c620abf967
GitHub-Pull-Request: golang/go#64905
Reviewed-on: https://go-review.googlesource.com/c/go/+/553295
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2024-01-23 02:16:01 +00:00
qiulaidongfeng
99e12bee44 reflect: StructOf set abi.TFlagRegularMemory
Complete a TODO.

Change-Id: I791d27266ccee69c371524e298120765f5736cf8
GitHub-Last-Rev: 8878003efa
GitHub-Pull-Request: golang/go#64617
Reviewed-on: https://go-review.googlesource.com/c/go/+/548435
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Reviewed-by: Keith Randall <khr@golang.org>
2024-01-23 00:36:00 +00:00
qiulaidongfeng
4605ce2d34 cmd/compile: use MapMaxKeyBytes,MapMaxElemBytes,MapBucketCount of internal/abi
For #59670

Change-Id: I651e211650e69989c598ab16202105bc6e68d67e
GitHub-Last-Rev: fba087a35f
GitHub-Pull-Request: golang/go#64776
Reviewed-on: https://go-review.googlesource.com/c/go/+/550615
Reviewed-by: Keith Randall <khr@google.com>
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2024-01-23 00:14:28 +00:00
Olivier Mengué
9c663e8bf7 hash/crc32: fix codegen to align with manual changes
Update gen_const_ppc64le.go to match the manual changes applied in
CL 478976.

Change-Id: I79a0d014a2a151750f898517b2771b312f3437bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/555996
Reviewed-by: Michael Pratt <mpratt@google.com>
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2024-01-23 00:03:20 +00:00
Jorropo
bbd0bc22ea cmd/compile: improve integer comparisons with numeric bounds
This do:
- Fold always false or always true comparisons for ints and uint.
- Reduce < and <= where the true set is only one value to == with such value.

Change-Id: Ie9e3f70efd1845bef62db56543f051a50ad2532e
Reviewed-on: https://go-review.googlesource.com/c/go/+/555135
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-23 00:02:36 +00:00
Joel Sing
370f1a88ed crypto/sha512: provide optimised assembly for riscv64
Provide an optimised assembly implementation of sha512 for riscv64.
This results in significant performance gains.

On a StarFive VisionFive 2:

                    │   sha512a   │               sha512b               │
                    │   sec/op    │   sec/op     vs base                │
Hash8Bytes/New-4      7.998µ ± 0%   6.962µ ± 0%  -12.96% (p=0.000 n=10)
Hash8Bytes/Sum384-4   8.113µ ± 0%   6.651µ ± 0%  -18.02% (p=0.000 n=10)
Hash8Bytes/Sum512-4   8.269µ ± 0%   6.748µ ± 0%  -18.39% (p=0.000 n=10)
Hash1K/New-4          57.38µ ± 0%   36.92µ ± 0%  -35.66% (p=0.000 n=10)
Hash1K/Sum384-4       57.47µ ± 0%   36.57µ ± 0%  -36.37% (p=0.000 n=10)
Hash1K/Sum512-4       57.61µ ± 0%   36.75µ ± 0%  -36.21% (p=0.000 n=10)
Hash8K/New-4          402.5µ ± 0%   245.4µ ± 0%  -39.02% (p=0.000 n=10)
Hash8K/Sum384-4       402.5µ ± 0%   245.1µ ± 0%  -39.12% (p=0.000 n=10)
Hash8K/Sum512-4       402.7µ ± 0%   245.3µ ± 0%  -39.09% (p=0.000 n=10)

                    │   sha512a    │                sha512b                │
                    │     B/s      │      B/s       vs base                │
Hash8Bytes/New-4      976.6Ki ± 0%   1123.0Ki ± 0%  +15.00% (p=0.000 n=10)
Hash8Bytes/Sum384-4   966.8Ki ± 0%   1171.9Ki ± 0%  +21.21% (p=0.000 n=10)
Hash8Bytes/Sum512-4   947.3Ki ± 0%   1162.1Ki ± 1%  +22.68% (p=0.000 n=10)
Hash1K/New-4          17.01Mi ± 0%    26.45Mi ± 0%  +55.47% (p=0.000 n=10)
Hash1K/Sum384-4       16.99Mi ± 0%    26.70Mi ± 0%  +57.13% (p=0.000 n=10)
Hash1K/Sum512-4       16.95Mi ± 0%    26.57Mi ± 0%  +56.74% (p=0.000 n=10)
Hash8K/New-4          19.41Mi ± 0%    31.83Mi ± 0%  +63.99% (p=0.000 n=10)
Hash8K/Sum384-4       19.41Mi ± 0%    31.88Mi ± 0%  +64.28% (p=0.000 n=10)
Hash8K/Sum512-4       19.40Mi ± 0%    31.85Mi ± 0%  +64.21% (p=0.000 n=10)

Change-Id: I92629a106b75b0526e9f2a8fe3cc4a6f7fc63c8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/518631
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: M Zhuo <mzh@golangcn.org>
Reviewed-by: Wang Yaduo <wangyaduo@linux.alibaba.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-01-22 23:53:04 +00:00
Michael Pratt
a807295d43 Revert "cmd/preprofile: Add preprocess tool to pre-parse the profile file."
This reverts CL 529738.

Reason for revert: Breaking longtest builders

For #58102.
Fixes #65220.

Change-Id: Id295e3249da9d82f6a9e4fc571760302a1362def
Reviewed-on: https://go-review.googlesource.com/c/go/+/557460
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-22 23:07:48 +00:00
Michael Anthony Knyszek
c46966653f runtime: use the correct M ID for syscalling goroutines in traces
Earlier in the development of the new tracer, m.id was used as a the
canonical ID for threads. Later, we switched to m.procid because it
matches the underlying OS resource. However, in that switch, we missed a
spot.

The tracer catches and emits statuses for goroutines that have remained
in either waiting or syscall across a whole generation, and emits a
thread ID for the latter set. The ID being used here, however, was m.id
instead of m.procid, like the rest of the tracer.

This CL also adds a regression test. In order to make the regression
test actually catch the failure, we also have to make the parser a
little less lenient about GoStatus events with GoSyscall: if this isn't
the first generation, then we should've seen the goroutine bound to an
M already when its status is getting emitted for its context. If we emit
the wrong ID, then we'll catch the issue when we emit the right ID when
the goroutine exits the syscall.

Fixes #65196.

Change-Id: I78b64fbea65308de5e1291c478a082a732a8bf9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/557456
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-22 21:47:43 +00:00
Jin Lin
b7ae16e04b cmd/preprofile: Add preprocess tool to pre-parse the profile file.
The pgo compilation time is very long if the profile file is large.
We added a preprocess tool to pre-parse profile file in order to
expedite the compile time.

Change-Id: I6f50bbd01f242448e2463607a9b63483c6ca9a12
Reviewed-on: https://go-review.googlesource.com/c/go/+/529738
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-01-22 21:47:07 +00:00
Bryan C. Mills
6e7aee5f6b net: delete TestListenCloseListen
In CL 557177, I attempted to fix a logical race in this test (#65175).
However, I introduced a data race in the process (#65209).

The race was reported on the windows-amd64-race builder. When I tried
to reproduce it on linux/amd64, I added a time.Sleep in the Accept
loop. However, that Sleep causes the test to fail outright with
EADDRINUSE, which suggests that my earlier guess about the open Conn
preventing reuse of the port was, in fact, incorrect.

On some platforms we could instead use SO_REUSEPORT and avoid closing
the first Listener entirely, but that wouldn't be even remotely in the
spirit of the original test.

Since I don't see a way to preserve the test in a way that is not
inherently flaky / racy, I suggest that we just delete it. It was
originally added as a regression test for a bug in the nacl port,
which no longer exists anyway. (Some of that code may live on in the
wasm port, but it doesn't seem worth maintaining a flaky
port-independent test to maintain a regression test for a bug specific
to secondary platforms.)

Fixes #65209.
Updates #65175.

Change-Id: I32f9da779d24f2e133571f0971ec460cebe7820a
Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-race
Reviewed-on: https://go-review.googlesource.com/c/go/+/557536
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
2024-01-22 21:04:44 +00:00