There are lots of useless buckets with too much precision. Introduce a
minimum level of precision with a minimum bucket bit. This cuts down on
the size of a time histogram dramatically (~3x). Also, pick a smaller
sub bucket count; we don't need 6% precision.
Also, rename super-buckets to buckets to more closely line up with HDR
histogram literature.
Change-Id: I199449650e4b34f2a6dca3cf1d8edb071c6655c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/427615
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Michael Pratt <mpratt@google.com>
Includes cases where the core type of the variadic parameter is
a slice or bytestring. Permits a client to create the signature
for various instantiations of append.
Fixes#55030.
Change-Id: I0f4983eb00c088cbe1d87954ee0b2df0ccc3bc49
Reviewed-on: https://go-review.googlesource.com/c/go/+/430455
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Apparently the new darwin linker starts to emit a warning about
-no_pie deprecation. Maybe we want to switch to PIE by default.
For now, suppress the warning. This also makes it easier for
backporting to previous releases.
For #54482.
Change-Id: I1a3b74c237a9d00ec3b030fc3a9940a31e5cd37e
Reviewed-on: https://go-review.googlesource.com/c/go/+/430937
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
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When running on Go 1.19, we can further simplify some of the exec.Cmd
helpers due to API improvements. There's not much point in doing this
while the bootstrap is still 1.17, but this will queue up this
simplification in an obvious way for when we next upgrade the
bootstrap toolchain (#54265).
Updates #44505.
Change-Id: I2ebc3d5c584375ec862a1d48138ab134bd9b2366
Reviewed-on: https://go-review.googlesource.com/c/go/+/427958
Reviewed-by: Bryan Mills <bcmills@google.com>
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Now that the required Go bootstrap version is 1.17, we can simplify
some of the logic for working with exec.Cmd.Env as those APIs have
been simplified.
Updates #44505.
Change-Id: Ia62ab9830320c7daf65a15f2313471dfaba687b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/427957
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function "ExampleFprint" will be rewritten to function "main"
when displayed on the godoc pages, so the online example is failed to
run:
Output:
panic: function not found
goroutine 1 [running]:
main.parseFunc({0x4f772e, 0xf}, {0x4f713f, 0xd})
/tmp/sandbox1264544227/prog.go:23 +0x13b
main.main()
/tmp/sandbox1264544227/prog.go:30 +0x45
See: https://pkg.go.dev/go/printer#example-Fprint
Add printSelf function to prevent the function not found when running in godoc
sandbox. Beside, deleting the dummy test function to make the example show
the entire file, as we want to show the newly added printSelf function.
Change-Id: Ia2b772937081b58a0fce9860838959c95f2d650c
GitHub-Last-Rev: bac1189173
GitHub-Pull-Request: golang/go#53141
Reviewed-on: https://go-review.googlesource.com/c/go/+/409314
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Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
The correct spelling is asyncpreemptoff=1,
but clearly this test doesn't need it.
Change-Id: Ic69cf5be04bf90d357a6e4d8ae3f9011f1779922
Reviewed-on: https://go-review.googlesource.com/c/go/+/430575
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Auto-Submit: Russ Cox <rsc@golang.org>
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For proposal #41583, add a new 'go test -skip' flag to make it easy
to disable specific tests, benchmarks, examples, or fuzz targets.
Fixes#41583.
Change-Id: Id12a6575f505dafdce4a149aedc454a002e93afa
Reviewed-on: https://go-review.googlesource.com/c/go/+/421439
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The object header string is meant to record the relevant toolchain
configuration, so that we don't import or link object files that are
incompatible with each other. One important part of compatibility
is the sub-architecture version (GOARM for GOARCH=arm, and so on).
Add the sub-architecture info to the object header line so that
binaries cannot be built that have inconsistent sub-architecture
configurations across the build.
This check is only important when the build system makes a mistake.
Builds using the go command don't make this kind of mistake anymore,
but we just debugged a difficult problem inside Google where a custom
build system had built part of a program with GOARM=5 and part of
a program with GOARM=7, resulting in corrupted execution when
signal-based preemption was attempted. Updating the check will avoid
this kind of problem in the future, in any custom build system, or if the
go command makes a mistake.
After this change:
% sed 3q pkg/darwin_amd64/runtime.a
!<arch>
__.PKGDEF 0 0 0 644 30525 `
go object darwin amd64 devel go1.20-102ebe10b7 Wed Aug 17 14:31:01 2022 -0400 GOAMD64=v1 X:regabiwrappers,regabiargs
%
Change-Id: I901e0758f1002dd2c58292dc65e2d06da86e4495
Reviewed-on: https://go-review.googlesource.com/c/go/+/427174
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
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The concurrent model for delivering tokens was fine for pedagogy,
but has caused a few problems as the package has evolved (that is,
got more complicated). It's easy to eliminate it, simplifying or
removing some of the hacks used to work around these prolems.
The old lexer would deliver tokens over a channel to the parsing
goroutine, and continue running until EOF. In this rewrite, we
instead run the machine until a token is ready, and shut it down
until the next token is needed. The mechanism is just to return nil
as the state function, which requires a bit more threading of return
values through the state functions but is not difficult. The change
is modest.
A couple of error messages change, but otherwise the change has no
external effect. This is just an internal cleanup, long overdue.
benchmark old ns/op new ns/op delta
BenchmarkParseLarge-20 12222729 6769966 -44.61%
BenchmarkVariableString-20 73.5 73.4 -0.16%
BenchmarkListString-20 1827 1841 +0.77%
benchmark old allocs new allocs delta
BenchmarkVariableString-20 3 3 +0.00%
BenchmarkListString-20 31 31 +0.00%
benchmark old bytes new bytes delta
BenchmarkVariableString-20 72 72 +0.00%
BenchmarkListString-20 1473 1473 +0.00%
Fixes#53261
Change-Id: I4133bed2f8df16d398b707fb9509230325765c57
Reviewed-on: https://go-review.googlesource.com/c/go/+/421883
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Use ppc64map (from x/arch) to generate ISA 3.1 support for the
assembler. A new file asm9_gtables.go is added which contains
generated code to encode ISA 3.1 instructions, a function to assist
filling out the oprange structure, a lookup table for the fixed
bits of each instructions, and a slice of string name. Generated
functions are shared if their bitwise encoding match, and the
translation from an obj.Prog structure matches.
The generated file is entirely self-contained, and does not require
regenerating any other files for changes within it. If opcodes in
a.out.go are reordered or changed, anames.go must be updated in
the same way as before.
Future improvements could shrink the generated opcode table
to 32 bit entries as there is much less variation of the
encoding of the prefix word, but it is not always identical
for instructions which share a similar encoding of arguments
(e.g PLWA and PLWZ).
Updates #44549
Change-Id: Ie83fa02497c9ad2280678d68391043d3aae63175
Reviewed-on: https://go-review.googlesource.com/c/go/+/419535
Run-TryBot: Paul Murphy <murp@ibm.com>
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Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
This CL adds tests for some of the instructions that were
missing. A minor change was made to asm9.go to ensure EXTSWSLICC
test works.
Change-Id: I95cd096c85778fc93856d213aa4fb14c35228cec
Reviewed-on: https://go-review.googlesource.com/c/go/+/430376
Run-TryBot: Archana Ravindar <aravind5@in.ibm.com>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
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Auto-Submit: Jenny Rakoczy <jenny@golang.org>
This is the initial trivial implemenation. Further improvements can be
made for local calls.
A test is added, but the -fno-plt option is ignored by gcc if binutils
does not support inline plt relocations, so the test is effectively
skipped on such hosts.
Fixes#53345
Change-Id: Ibf31c26b1a8551c942b21019df8782c00b7a563e
Reviewed-on: https://go-review.googlesource.com/c/go/+/412714
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
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The optimizations were added in CL 425197 and CL 421877.
Move this functionality to a separate file to keep format.go smaller
and to document the justification for why this optimization exists.
Change-Id: I1e4e1ace19f9d596d8c0cf49ab6062f63a87b5bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/430675
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
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Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Jenny Rakoczy <jenny@golang.org>
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
Use fcntl(oldfd, F_DUP2FD_CLOEXEC, newfd) to duplicate the file
descriptor and mark is as close-on-exec instead of dup2 & fcntl.
DragonFly BSD implements dup3 like this in libc since version 5.4.
Change-Id: I80c765faa288add8ffb236284c9e8c4f8e6c6769
Reviewed-on: https://go-review.googlesource.com/c/go/+/430535
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Increase unit test coverage of strconv/itoa.go from 83.8% to 85%
Change-Id: I0abdfc70a3f06251106f229c12ffb105eeb43fc8
GitHub-Last-Rev: da9755368b
GitHub-Pull-Request: golang/go#55014
Reviewed-on: https://go-review.googlesource.com/c/go/+/430137
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Merge the CRC32 Update and Write functions using an unexported function, to avoid duplication of code and make it more readable.
The only difference between them is the check of the initialization of the IEEE table, and a boolean value specifies that.
Throughout the crc32.go file, in the switches the default value is inserted inside the switch statement, this change uniforms the style of the MakeTable function, making it like the other pieces of code.
Change-Id: I3889f6c6671210c82f0d7250cea67907bccf3ce7
GitHub-Last-Rev: b8777ee213
GitHub-Pull-Request: golang/go#55044
Reviewed-on: https://go-review.googlesource.com/c/go/+/430456
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Use fcntl(oldfd, F_DUP2FD_CLOEXEC, newfd) to duplicate the file
descriptor and mark is as close-on-exec instead of dup2 & fcntl.
Note that the value for F_DUP2FD_CLOEXEC is different on Solaris and
Illumos and thus the definition is moved from zerrors_solaris_amd64.go
to solaris/illumos specific files.
Change-Id: I9a52801d1a01471ec3f065520575e3fafee92855
Reviewed-on: https://go-review.googlesource.com/c/go/+/428375
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The text was mistakenly quoted with backquotes.
Change-Id: I77ed4adac8c78b719bea61c08f1c377ed4ac4c9d
GitHub-Last-Rev: 6f1430fe16
GitHub-Pull-Request: golang/go#55059
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Go 1.19 introduce new append-like APIs in package encoding/binary, this
change teaches the inliner to treat calls to these methods as cheap, so
that code using them will be more inlineable.
Updates #42958
Change-Id: Ie3dd4906e285430f435bdedbf8a11fdffce9302d
Reviewed-on: https://go-review.googlesource.com/c/go/+/431015
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These instructions already do sign extension on output, so we can get rid of it.
Note: (MOVWreg (MULW x y)) may araise from divisions by constant,
generic rules replace them with multiply and may produce (Rsh32x64 (Mul32 _ _) _).
Change-Id: I41bc9b519e38bc6027311de604dadb962cd0bbf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/429757
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Calling close is no longer necessary.
It was was originally necessary to cleanup goroutines
spawned to decompress the stream.
This has not been the case since CL 4548079.
Update the documentation to mention how it handles trailing data
after the end of the DEFLATE stream.
Change-Id: Ieacba264230560713b7b8d604665223fd096f4ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/430377
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We added -pagezero_size in CL 72730, where it was intented for iOS.
The current code passes it only on macOS/AMD64 instead. It is not
really necessary there. Also, the new darwin linker starts to emit
a warning about deprecation of the flag. Stop passing it.
For #54482.
Change-Id: If9db7a1645c37d4284e48f075856912df8d8c1a0
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Allow us to select a race .syso file based on subarch values.
Note that this doesn't actually change the syso used. This CL
just moves things around in preparation for adding v3-specific
versions in future CLs.
Change-Id: I14e3c273a7c6f07b13b22193b7a851ea94c765cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/424034
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CL 413374 added syscall.Mmap on solaris. Use it in cmd/compile and
cmd/link if the bootstrap toolchain is Go ≥ 1.20.
For #52875
For #54265
Change-Id: I9a0534bf97926eecf0c6f1f9218e855344ba158f
Reviewed-on: https://go-review.googlesource.com/c/go/+/430496
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Support for 1xx responses has recently been merged in
net/http (CL 269997).
As discussed in this CL
(https://go-review.googlesource.com/c/go/+/269997/comments/1ff70bef_c25a829a),
support for forwarding 1xx responses in ReverseProxy has been extracted
in this separate patch.
According to RFC 7231, "a proxy MUST forward 1xx responses unless the
proxy itself requested the generation of the 1xx response".
Consequently, all received 1xx responses are automatically forwarded as long as the
underlying transport supports ClientTrace.Got1xxResponse.
Fixes#26088Fixes#51914
Change-Id: I3a35ea023b798bfe56b7fb8696d5a49695229cfd
GitHub-Last-Rev: dab8a461fb
GitHub-Pull-Request: golang/go#53164
Reviewed-on: https://go-review.googlesource.com/c/go/+/409536
Reviewed-by: Damien Neil <dneil@google.com>
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Noticed in a manual audit from a customer codebase that the pattern
w.WriteString(fmt.Sprint*(args...))
was less efficient and in most cases we can just invoke:
fmt.Fprint*(w, args...)
and from the simple benchmarks we can see quick wins in all dimensions:
$ benchstat before.txt after.txt
name old time/op new time/op delta
DetailString-8 5.48µs ±23% 4.40µs ±11% -19.79% (p=0.000 n=20+17)
name old alloc/op new alloc/op delta
DetailString-8 2.63kB ± 0% 2.11kB ± 0% -19.76% (p=0.000 n=20+20)
name old allocs/op new allocs/op delta
DetailString-8 63.0 ± 0% 50.0 ± 0% -20.63% (p=0.000 n=20+20)
Change-Id: I47a2827cd34d6b92644900b1bd5f4c0a3287bdb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/429861
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Remove an unnecessary 'an' from errorcodes.go.
Change-Id: Iabe8ce479077cbfff936d57c788a9b39d7e5b34e
Reviewed-on: https://go-review.googlesource.com/c/go/+/430495
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The existing implementation allocates a new string even when the
count is 1, where we know the output is the same as the input.
While we wouldn't expect a count of 1 for hardcoded values of the
parameter, it is expected when the parameter is computed based on
a different value (e.g., the length of a input slice).
name old time/op new time/op delta
Repeat/5x0-10 2.03ns ± 0% 2.02ns ± 0% ~ (p=1.000 n=1+1)
Repeat/5x1-10 13.7ns ± 0% 2.0ns ± 0% ~ (p=1.000 n=1+1)
Repeat/5x2-10 18.2ns ± 0% 18.1ns ± 0% ~ (p=1.000 n=1+1)
Repeat/5x6-10 27.0ns ± 0% 27.0ns ± 0% ~ (p=1.000 n=1+1)
Repeat/10x0-10 2.02ns ± 0% 2.02ns ± 0% ~ (p=1.000 n=1+1)
Repeat/10x1-10 16.1ns ± 0% 2.0ns ± 0% ~ (p=1.000 n=1+1)
Repeat/10x2-10 20.8ns ± 0% 20.9ns ± 0% ~ (p=1.000 n=1+1)
Repeat/10x6-10 29.2ns ± 0% 29.4ns ± 0% ~ (p=1.000 n=1+1)
Change-Id: I48e08e08f8f6d6914d62b3d6a61d563d637bec59
GitHub-Last-Rev: 068f58e08b
GitHub-Pull-Request: golang/go#53321
Reviewed-on: https://go-review.googlesource.com/c/go/+/411477
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These variables never change, we don't need second copies of them.
Also rename bPlusBuild to plusBuild, since it is the only remaining
variable with a "b" prefix.
Change-Id: I97089b001d23e9b0f2096e19d9ceed7a9bbb377d
Reviewed-on: https://go-review.googlesource.com/c/go/+/429636
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Reviewed-by: Ian Lance Taylor <iant@google.com>
The issue referenced in work_prune.txt was fixed in CL 362754, but we
forgot to update the TODO or mark the issue as fixed in the commit
message.
Updates #48331.
Change-Id: Id2115e496aeaef275dd3c8d32c5c5564e6addb07
Reviewed-on: https://go-review.googlesource.com/c/go/+/425485
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Fixes#52812
Change-Id: Idb70d0540bbf9ecdc64293c62a23f07ee3be883c
Reviewed-on: https://go-review.googlesource.com/c/go/+/405615
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The rule uses R25 as a scratch register. If the input is R25 it
will be clobbered on the way, causing wrong result.
Change-Id: I464eadbdef0f3a5e90f9ef8c818393baa4335b87
Reviewed-on: https://go-review.googlesource.com/c/go/+/430015
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The changes improve the documentation for DefaultTransport, making
the style with how the HTTP proxy environment variables are being
referred to, consistent with the rest of the project's
documentation.
Also mention HTTPS_PROXY environment variables, as suggested in #32649.
Change-Id: I4e6b49881d7b30b5a0d4699531fa7c2929fc49f7
GitHub-Last-Rev: 2fc751937b
GitHub-Pull-Request: golang/go#54996
Reviewed-on: https://go-review.googlesource.com/c/go/+/430135
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all_test.go is quite big, so let it contain tests only.
Change-Id: I5003db4a8b1e2384ea8470f5e89e1c26d61d10ae
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objabi.HeadType is typically used as a non-pointer type, however the String function
is declared on a pointer receiver. This means that in most cases its integer value
is printed, rather than the value from the String function.
Change-Id: I3d28d9680e88a714bc1152ed5e1df4ac43d7a33f
Reviewed-on: https://go-review.googlesource.com/c/go/+/430556
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