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33858 Commits

Author SHA1 Message Date
Aliaksandr Valialkin
76f4fd8a52 runtime: improve timers scalability on multi-CPU systems
Use per-P timers, so each P may work with its own timers.

This CL improves performance on multi-CPU systems
in the following cases:

- When serving high number of concurrent connections
  with read/write deadlines set (for instance, highly loaded
  net/http server).

- When using high number of concurrent timers. These timers
  may be implicitly created via context.WithDeadline
  or context.WithTimeout.

Production servers should usually set timeout on connections
and external requests in order to prevent from resource leakage.
See https://blog.cloudflare.com/the-complete-guide-to-golang-net-http-timeouts/

Below are relevant benchmark results for various GOMAXPROCS values
on linux/amd64:

context package:

name                                     old time/op  new time/op  delta
WithTimeout/concurrency=40      4.92µs ± 0%  5.17µs ± 1%  +5.07%  (p=0.000 n=9+9)
WithTimeout/concurrency=4000    6.03µs ± 1%  6.49µs ± 0%  +7.63%  (p=0.000 n=8+10)
WithTimeout/concurrency=400000  8.58µs ± 7%  9.02µs ± 4%  +5.02%  (p=0.019 n=10+10)

name                                     old time/op  new time/op  delta
WithTimeout/concurrency=40-2      3.70µs ± 1%  2.78µs ± 4%  -24.90%  (p=0.000 n=8+9)
WithTimeout/concurrency=4000-2    4.49µs ± 4%  3.67µs ± 5%  -18.26%  (p=0.000 n=10+10)
WithTimeout/concurrency=400000-2  6.16µs ±10%  5.15µs ±13%  -16.30%  (p=0.000 n=10+10)

name                                     old time/op  new time/op  delta
WithTimeout/concurrency=40-4      3.58µs ± 1%  2.64µs ± 2%  -26.13%  (p=0.000 n=9+10)
WithTimeout/concurrency=4000-4    4.17µs ± 0%  3.32µs ± 1%  -20.36%  (p=0.000 n=10+10)
WithTimeout/concurrency=400000-4  5.57µs ± 9%  4.83µs ±10%  -13.27%  (p=0.001 n=10+10)

time package:

name                     old time/op  new time/op  delta
AfterFunc                6.15ms ± 3%  6.07ms ± 2%     ~     (p=0.133 n=10+9)
AfterFunc-2              3.43ms ± 1%  3.56ms ± 1%   +3.91%  (p=0.000 n=10+9)
AfterFunc-4              5.04ms ± 2%  2.36ms ± 0%  -53.20%  (p=0.000 n=10+9)
After                    6.54ms ± 2%  6.49ms ± 3%     ~     (p=0.393 n=10+10)
After-2                  3.68ms ± 1%  3.87ms ± 0%   +5.14%  (p=0.000 n=9+9)
After-4                  6.66ms ± 1%  2.87ms ± 1%  -56.89%  (p=0.000 n=10+10)
Stop                      698µs ± 2%   689µs ± 1%   -1.26%  (p=0.011 n=10+10)
Stop-2                    729µs ± 2%   434µs ± 3%  -40.49%  (p=0.000 n=10+10)
Stop-4                    837µs ± 3%   333µs ± 2%  -60.20%  (p=0.000 n=10+10)
SimultaneousAfterFunc     694µs ± 1%   692µs ± 7%     ~     (p=0.481 n=10+10)
SimultaneousAfterFunc-2   714µs ± 3%   569µs ± 2%  -20.33%  (p=0.000 n=10+10)
SimultaneousAfterFunc-4   782µs ± 2%   386µs ± 2%  -50.67%  (p=0.000 n=10+10)
StartStop                 267µs ± 3%   274µs ± 0%   +2.64%  (p=0.000 n=8+9)
StartStop-2               238µs ± 2%   140µs ± 3%  -40.95%  (p=0.000 n=10+8)
StartStop-4               320µs ± 1%   125µs ± 1%  -61.02%  (p=0.000 n=9+9)
Reset                    75.0µs ± 1%  77.5µs ± 2%   +3.38%  (p=0.000 n=10+10)
Reset-2                   150µs ± 2%    40µs ± 5%  -73.09%  (p=0.000 n=10+9)
Reset-4                   226µs ± 1%    33µs ± 1%  -85.42%  (p=0.000 n=10+10)
Sleep                     857µs ± 6%   878µs ± 9%     ~     (p=0.079 n=10+9)
Sleep-2                   617µs ± 4%   585µs ± 2%   -5.21%  (p=0.000 n=10+10)
Sleep-4                   689µs ± 3%   465µs ± 4%  -32.53%  (p=0.000 n=10+10)
Ticker                   55.9ms ± 2%  55.9ms ± 2%     ~     (p=0.971 n=10+10)
Ticker-2                 28.7ms ± 2%  28.1ms ± 1%   -2.06%  (p=0.000 n=10+10)
Ticker-4                 14.6ms ± 0%  13.6ms ± 1%   -6.80%  (p=0.000 n=9+10)

Fixes #15133

Change-Id: I6f4b09d2db8c5bec93146db6501b44dbfe5c0ac4
Reviewed-on: https://go-review.googlesource.com/34784
Reviewed-by: Austin Clements <austin@google.com>
2017-09-12 16:52:23 +00:00
Daniel Martí
7377d0c7e9 go/*: use sort.Slice to simplify some code
Skip the ones that have multiple uses for now. Also had to rename the
importComment variable as it shadowed the top-level func by the same
name.

Change-Id: I796285aa7b4fdf2c39e652666390427d37b063ee
Reviewed-on: https://go-review.googlesource.com/63150
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-12 14:59:39 +00:00
Daniel Martí
eb2dc3d3d0 all: remove strings.Contains check around Replace
It doesn't change the outcome. It might have been useful at some point
to avoid Replace from doing work or allocating. However, nowadays the
func returns early without doing any work if Count returns 0.

Change-Id: Id69dc74042a6e39672b405016484db8b50f43d58
Reviewed-on: https://go-review.googlesource.com/62991
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
2017-09-12 08:58:28 +00:00
Martin Möhrmann
137e4a6c63 cmd/compile: improve single blank variable handling in walkrange
Refactor walkrange to treat "for _ = range a" as "for range a".

This avoids generating some later discarded nodes in the compiler.

Passes toolstash -cmp.

Change-Id: Ifb2e1ca3b8519cbb67e8ad5aad514af9d18f1ec4
Reviewed-on: https://go-review.googlesource.com/61017
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-12 05:50:54 +00:00
Luan Santos
78c4dc3709 net/http: allow reuse of http.Request objects
Calling response.Body.Close() early would generarate a race before this.
Since closing would return early before the main code path had a chance
to reset the request canceler. Having a non-nil request canceler at the
start of the next request would cause a "request canceled" error.

Here we simply wait for the eofc channel to be closed before returning
from earlyCloseFn, ensuring that the caller won't be re-using that
Request object before we have a chance to reset the request canceler to
nil.

Fixes #21838

Change-Id: I641815526c6ac63d1816c9b6ad49d73715f7a5cb
Reviewed-on: https://go-review.googlesource.com/62891
Run-TryBot: Tom Bergan <tombergan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>
2017-09-11 23:10:06 +00:00
Bryan C. Mills
cf872fae78 expvar: make (*Map).Init clear existing keys
fixes #21619

Change-Id: I5bb513dfc8cac875b06a262eec40b5863ae23a4c
Reviewed-on: https://go-review.googlesource.com/62370
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 21:31:51 +00:00
Lynn Boger
e9cbabb334 cmd/link: enable -buildmode=plugin for ppc64le
This enables support for the buildmode plugin on
ppc64le.

Fixes #20756

Change-Id: I83241ff63f9b5c366fe0496cf46a3f67d75d08ac
Reviewed-on: https://go-review.googlesource.com/55850
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2017-09-11 21:20:38 +00:00
Ilya Tocar
dc3b8a193c crypto/sha1: speed up sha1 for very small blocks
For very small blocks significant time is spent in checkSum function,
adding necessary padding. Instead of writing it byte by byte, copy
encoding/binary PutUint functions, which are compiled into single mov.

name            old time/op    new time/op    delta
Hash8Bytes-6       344ns ± 0%     310ns ± 0%   -9.78%  (p=0.000 n=10+9)
Hash320Bytes-6    1.28µs ± 0%    1.25µs ± 0%   -2.58%  (p=0.000 n=10+10)
Hash1K-6          2.51µs ± 0%    2.47µs ± 0%   -1.67%  (p=0.000 n=10+10)
Hash8K-6          15.8µs ± 0%    15.7µs ± 1%   -0.21%  (p=0.023 n=10+10)

name            old speed      new speed      delta
Hash8Bytes-6    23.2MB/s ± 0%  25.7MB/s ± 0%  +10.77%  (p=0.000 n=10+9)
Hash320Bytes-6   249MB/s ± 0%   256MB/s ± 0%   +2.65%  (p=0.000 n=10+10)
Hash1K-6         408MB/s ± 0%   414MB/s ± 0%   +1.70%  (p=0.000 n=10+10)

Change-Id: I3975ee929465c7dd137d0ca757ad3792a004e1a3
Reviewed-on: https://go-review.googlesource.com/54391
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Filippo Valsorda <hi@filippo.io>
2017-09-11 21:17:07 +00:00
Daniel Martí
27a70ea560 cmd/compile: simplify a few early var declarations
These were likely written in C or added by an automated tool. Either
way, they're unnecessary now. Clean up the code.

Change-Id: I56de2c7bb60ebab8c500803a8b6586bdf4bf75c7
Reviewed-on: https://go-review.googlesource.com/62951
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 21:16:39 +00:00
Lynn Boger
fa3fe2e3c6 cmd/compile, math/bits: add rotate rules to PPC64.rules
This adds rules to match the code in math/bits RotateLeft,
RotateLeft32, and RotateLef64 to allow them to be inlined.

The rules are complicated because the code in these function
use different types, and the non-const version of these
shifts generate Mask and Carry instructions that become
subexpressions during the match process.

Also adds a testcase to asm_test.go.

Improvement in math/bits:

BenchmarkRotateLeft-16       1.57     1.32      -15.92%
BenchmarkRotateLeft32-16     1.60     1.37      -14.37%
BenchmarkRotateLeft64-16     1.57     1.32      -15.92%

Updates #21390

Change-Id: Ib6f17669ecc9cab54f18d690be27e2225ca654a4
Reviewed-on: https://go-review.googlesource.com/59932
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2017-09-11 20:44:22 +00:00
Joe Tsai
4768408e5f cmd/go: fix regexp
The regular expression "A-za-z" is most likely a typo and
the intent seems to be "A-Za-z" instead.

Using "A-z" matches certain characters like: [\]^_`

Updates #10010

Change-Id: If2d064c56ef613f2e46285d8d4e5998e83aed43a
Reviewed-on: https://go-review.googlesource.com/62910
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
2017-09-11 19:59:43 +00:00
Adam Langley
2d69e9e259 crypto/elliptic: fix incomplete addition used in CombinedMult.
The optimised P-256 includes a CombinedMult function, which doesn't do
dual-scalar multiplication, but does avoid an affine conversion for
ECDSA verification.

However, it currently uses an assembly point addition function that
doesn't handle exceptional cases.

Fixes #20215.

Change-Id: I4ba2ca1a546d883364a9bb6bf0bdbc7f7b44c94a
Reviewed-on: https://go-review.googlesource.com/42611
Run-TryBot: Adam Langley <agl@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
2017-09-11 18:44:58 +00:00
Alan Donovan
7159ab4871 cmd/vet: print: permit '#' flag in %e, %f, and %g
+ Test

Change-Id: I7b42ff70f26a58e1cf58cbbc53d02a65623456ae
Reviewed-on: https://go-review.googlesource.com/62371
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 18:11:48 +00:00
Lynn Boger
b74b43de68 cmd/compile: request r12 for indirect calls on ppc64le
On ppc64le, functions compiled with -shared expect r12 to
hold the function's address for indirect calls. Previously
this was enforced by generating a move instruction if the
address wasn't already in r12. This change avoids that extra
move by requesting r12 in the CALL ops that do indirect calls.

As a result of adding support for plugins on ppc64le, it was
discovered that there would be more cases where this extra
move was needed, so this seemed like a better solution.

Updates #20756

Change-Id: I6770885a46990f78c6d2902a715dcdaa822192a1
Reviewed-on: https://go-review.googlesource.com/62890
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-09-11 18:02:33 +00:00
Michael Munday
818353022e crypto/elliptic: temporarily disable s390x assembly
This disables the s390x assembly. It will be re-enabled when #20215
is resolved on s390x.

Change-Id: I789eca2dd478004956107359fae98ed012f04abb
Reviewed-on: https://go-review.googlesource.com/62292
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-11 17:26:17 +00:00
Andrew Bonventre
98603e7af6 doc: hide content blocked by GFW when served in CN
Change-Id: Ia3d0fa0517d96f0672d3c5ce7e7b7bb8bd0ce093
Reviewed-on: https://go-review.googlesource.com/60070
Reviewed-by: Chris Broadfoot <cbro@golang.org>
2017-09-11 14:59:59 +00:00
Ben Shi
f727fa7939 cmd/internal/obj/arm: support more ARM VFP instructions
Add support of more ARM VFP instructions in the assembler.
They were introduced in ARM VFPv4.

"FMULAF/FMULAD   Fm, Fn, Fd": Fd = Fd + Fn*Fm
"FNMULAF/FNMULAD Fm, Fn, Fd": Fd = -(Fd + Fn*Fm)
"FMULSF/FMULSD   Fm, Fn, Fd": Fd = Fd - Fn*Fm
"FNMULSF/FNMULSD Fm, Fn, Fd": Fd = -(Fd - Fn*Fm)

The multiplication results are not rounded.

Change-Id: Id9cc52fd8e1b9a708103cd1e514c85a9e1cb3f47
Reviewed-on: https://go-review.googlesource.com/62550
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 13:10:50 +00:00
Ben Shi
2899c3e8cb cmd/compile: optimize ARM code with NMULF/NMULD
NMULF and NMULD are efficient FP instructions, and the go compiler can
use them to generate better code.

The benchmark tests of my patch did not show general change, but big
improvement in special cases.

1.A special test case improved 12.6%.
https://github.com/benshi001/ugo1/blob/master/fpmul_test.go
name                     old time/op    new time/op    delta
FPMul-4                     398µs ± 1%     348µs ± 1%  -12.64%  (p=0.000 n=40+40)

2. the compilecmp test showed little change.
name        old time/op       new time/op       delta
Template          2.30s ± 1%        2.31s ± 1%    ~     (p=0.754 n=17+19)
Unicode           1.31s ± 3%        1.32s ± 5%    ~     (p=0.265 n=20+20)
GoTypes           7.73s ± 2%        7.73s ± 1%    ~     (p=0.925 n=20+20)
Compiler          37.0s ± 1%        37.3s ± 2%  +0.79%  (p=0.002 n=19+20)
SSA               83.8s ± 4%        83.5s ± 2%    ~     (p=0.964 n=20+17)
Flate             1.43s ± 2%        1.44s ± 1%    ~     (p=0.602 n=20+20)
GoParser          1.82s ± 2%        1.81s ± 2%    ~     (p=0.141 n=19+20)
Reflect           5.08s ± 2%        5.08s ± 3%    ~     (p=0.835 n=20+19)
Tar               2.36s ± 1%        2.35s ± 1%    ~     (p=0.195 n=18+17)
XML               2.57s ± 2%        2.56s ± 1%    ~     (p=0.283 n=20+17)
[Geo mean]        4.74s             4.75s       +0.05%

name        old user-time/op  new user-time/op  delta
Template          2.75s ± 2%        2.75s ± 0%    ~     (p=0.620 n=20+15)
Unicode           1.59s ± 4%        1.60s ± 4%    ~     (p=0.479 n=20+19)
GoTypes           9.48s ± 1%        9.47s ± 1%    ~     (p=0.743 n=20+20)
Compiler          45.7s ± 1%        45.7s ± 1%    ~     (p=0.482 n=19+20)
SSA                109s ± 1%         109s ± 2%    ~     (p=0.800 n=18+20)
Flate             1.67s ± 3%        1.67s ± 3%    ~     (p=0.598 n=19+18)
GoParser          2.15s ± 4%        2.13s ± 3%    ~     (p=0.153 n=20+20)
Reflect           5.95s ± 2%        5.95s ± 2%    ~     (p=0.961 n=19+20)
Tar               2.93s ± 2%        2.92s ± 3%    ~     (p=0.242 n=20+19)
XML               3.02s ± 3%        3.04s ± 3%    ~     (p=0.233 n=19+18)
[Geo mean]        5.74s             5.74s       -0.04%

name        old text-bytes    new text-bytes    delta
HelloSize         588kB ± 0%        588kB ± 0%    ~     (all equal)

name        old data-bytes    new data-bytes    delta
HelloSize        5.46kB ± 0%       5.46kB ± 0%    ~     (all equal)

name        old bss-bytes     new bss-bytes     delta
HelloSize        72.9kB ± 0%       72.9kB ± 0%    ~     (all equal)

name        old exe-bytes     new exe-bytes     delta
HelloSize        1.03MB ± 0%       1.03MB ± 0%    ~     (all equal)

3. The go1 benchmark showed little change in total.
name                     old time/op    new time/op    delta
BinaryTree17-4              41.8s ± 1%     41.8s ± 1%    ~     (p=0.388 n=40+39)
Fannkuch11-4                24.1s ± 1%     24.1s ± 1%    ~     (p=0.077 n=40+40)
FmtFprintfEmpty-4           834ns ± 1%     831ns ± 1%  -0.31%  (p=0.002 n=40+37)
FmtFprintfString-4         1.34µs ± 1%    1.34µs ± 0%    ~     (p=0.387 n=40+40)
FmtFprintfInt-4            1.44µs ± 1%    1.44µs ± 1%    ~     (p=0.421 n=40+40)
FmtFprintfIntInt-4         2.09µs ± 0%    2.09µs ± 1%    ~     (p=0.589 n=40+39)
FmtFprintfPrefixedInt-4    2.32µs ± 1%    2.33µs ± 1%  +0.15%  (p=0.001 n=40+40)
FmtFprintfFloat-4          4.51µs ± 0%    4.44µs ± 1%  -1.50%  (p=0.000 n=40+40)
FmtManyArgs-4              7.94µs ± 0%    7.97µs ± 0%  +0.36%  (p=0.001 n=32+40)
GobDecode-4                 104ms ± 1%     102ms ± 2%  -1.27%  (p=0.000 n=39+37)
GobEncode-4                90.5ms ± 1%    90.9ms ± 2%  +0.40%  (p=0.006 n=37+40)
Gzip-4                      4.10s ± 2%     4.08s ± 1%  -0.30%  (p=0.004 n=40+40)
Gunzip-4                    603ms ± 0%     602ms ± 1%    ~     (p=0.303 n=37+40)
HTTPClientServer-4          672µs ± 3%     658µs ± 2%  -2.08%  (p=0.000 n=39+37)
JSONEncode-4                238ms ± 1%     239ms ± 0%  +0.26%  (p=0.001 n=40+25)
JSONDecode-4                884ms ± 1%     885ms ± 1%  +0.16%  (p=0.012 n=40+40)
Mandelbrot200-4            49.3ms ± 0%    49.3ms ± 0%    ~     (p=0.588 n=40+38)
GoParse-4                  46.3ms ± 1%    46.4ms ± 2%    ~     (p=0.487 n=40+40)
RegexpMatchEasy0_32-4      1.28µs ± 1%    1.28µs ± 0%  +0.12%  (p=0.003 n=40+40)
RegexpMatchEasy0_1K-4      7.78µs ± 5%    7.78µs ± 4%    ~     (p=0.825 n=40+40)
RegexpMatchEasy1_32-4      1.29µs ± 1%    1.29µs ± 0%    ~     (p=0.659 n=40+40)
RegexpMatchEasy1_1K-4      10.3µs ± 3%    10.4µs ± 2%    ~     (p=0.266 n=40+40)
RegexpMatchMedium_32-4     2.05µs ± 1%    2.05µs ± 0%  -0.18%  (p=0.002 n=40+28)
RegexpMatchMedium_1K-4      533µs ± 1%     534µs ± 1%    ~     (p=0.397 n=37+40)
RegexpMatchHard_32-4       28.9µs ± 1%    28.9µs ± 1%  -0.22%  (p=0.002 n=40+40)
RegexpMatchHard_1K-4        868µs ± 1%     870µs ± 1%  +0.21%  (p=0.015 n=40+40)
Revcomp-4                  67.3ms ± 1%    67.2ms ± 2%    ~     (p=0.262 n=38+39)
Template-4                  1.07s ± 1%     1.07s ± 1%    ~     (p=0.276 n=40+40)
TimeParse-4                7.16µs ± 1%    7.16µs ± 1%    ~     (p=0.610 n=39+40)
TimeFormat-4               13.3µs ± 1%    13.3µs ± 1%    ~     (p=0.617 n=38+40)
[Geo mean]                  720µs          719µs       -0.13%

name                     old speed      new speed      delta
GobDecode-4              7.39MB/s ± 1%  7.49MB/s ± 2%  +1.25%  (p=0.000 n=39+38)
GobEncode-4              8.48MB/s ± 1%  8.45MB/s ± 2%  -0.40%  (p=0.005 n=37+40)
Gzip-4                   4.74MB/s ± 2%  4.75MB/s ± 1%  +0.30%  (p=0.018 n=40+40)
Gunzip-4                 32.2MB/s ± 0%  32.2MB/s ± 1%    ~     (p=0.272 n=36+40)
JSONEncode-4             8.15MB/s ± 1%  8.13MB/s ± 0%  -0.26%  (p=0.003 n=40+25)
JSONDecode-4             2.19MB/s ± 1%  2.19MB/s ± 1%    ~     (p=0.676 n=40+40)
GoParse-4                1.25MB/s ± 2%  1.25MB/s ± 2%    ~     (p=0.823 n=40+40)
RegexpMatchEasy0_32-4    25.1MB/s ± 1%  25.1MB/s ± 0%  -0.12%  (p=0.006 n=40+40)
RegexpMatchEasy0_1K-4     132MB/s ± 5%   132MB/s ± 5%    ~     (p=0.821 n=40+40)
RegexpMatchEasy1_32-4    24.7MB/s ± 1%  24.7MB/s ± 0%    ~     (p=0.630 n=40+40)
RegexpMatchEasy1_1K-4    99.1MB/s ± 3%  98.8MB/s ± 2%    ~     (p=0.268 n=40+40)
RegexpMatchMedium_32-4    487kB/s ± 2%   490kB/s ± 0%  +0.51%  (p=0.001 n=40+40)
RegexpMatchMedium_1K-4   1.92MB/s ± 1%  1.92MB/s ± 1%    ~     (p=0.208 n=39+40)
RegexpMatchHard_32-4     1.11MB/s ± 1%  1.11MB/s ± 0%  +0.36%  (p=0.000 n=40+33)
RegexpMatchHard_1K-4     1.18MB/s ± 1%  1.18MB/s ± 1%    ~     (p=0.207 n=40+37)
Revcomp-4                37.8MB/s ± 1%  37.8MB/s ± 2%    ~     (p=0.276 n=38+39)
Template-4               1.82MB/s ± 1%  1.81MB/s ± 1%    ~     (p=0.122 n=38+40)
[Geo mean]               6.81MB/s       6.81MB/s       +0.06%

fixes #19843

Change-Id: Ief3a0c2b15f59d40c7b40f2784eeb71196685b59
Reviewed-on: https://go-review.googlesource.com/61150
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 13:10:33 +00:00
Alex Brainman
538b4bab3d misc/cgo/testcshared: actually run test executable on android
CL 62593 broken TestExportedSymbols and TestUnexportedSymbols
because it started executing android test binary on host.
Make them run on android.

Hopefully fixes android build.

Change-Id: Ic0bb9f0cbbefca23828574282caa33a03ef72431
Reviewed-on: https://go-review.googlesource.com/62830
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Elias Naur <elias.naur@gmail.com>
2017-09-11 09:22:44 +00:00
Jaana Burcu Dogan
e91639285f doc: fix typo in the diagnostics guide
Change-Id: Ib1b93e55788168b574badeb84d0e6c4f3795055e
Reviewed-on: https://go-review.googlesource.com/62510
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-11 07:54:34 +00:00
Alex Brainman
40a7de7b3a misc/cgo/testcshared: simlpify cshared_test.go
Change-Id: Ib35bb7fc9c5b4ccc9b8e1bd16443e0b307be9406
Reviewed-on: https://go-review.googlesource.com/62593
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 06:29:44 +00:00
Anthony Sottile
57fa1c7c94 cmd/cgo: treat simple C typedefs as go aliases
Fixes #21809

Change-Id: Ic43077c6bea3c7cdc9611e74abf07b6deab70433
Reviewed-on: https://go-review.googlesource.com/62670
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-11 06:24:15 +00:00
Ian Lance Taylor
c6d019aa63 test: add test case that gccgo crashed on
Change-Id: I4d5d40e1ed3f58b2cdecd6248cb25c8ae9a1b9a1
Reviewed-on: https://go-review.googlesource.com/62531
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2017-09-11 06:03:39 +00:00
Martin Möhrmann
098126103e cmd/compile: preserve escape information for map literals
While some map literals were marked non-escaping that information
was lost when creating the corresponding OMAKE node which made map
literals always heap allocated.

Copying the escape information to the corresponding OMAKE node allows
stack allocation of hmap and a map bucket for non escaping map literals.

Fixes #21830

Change-Id: Ife0b020fffbc513f1ac009352f2ecb110d6889c9
Reviewed-on: https://go-review.googlesource.com/62790
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 05:54:46 +00:00
Martin Möhrmann
1a3230f281 internal/cpu: add support for x86 FMA cpu feature detection
Change-Id: I88ea39de01b07e6afa1c187c0df6a258da4aa8e4
Reviewed-on: https://go-review.googlesource.com/62650
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-11 05:20:01 +00:00
Hiroshi Ioka
f797e485e0 cmd/link: don't generate runtime.text twice for buildmode=plugin on darwin
https://golang.org/cl/29394 changed to include runtime.text and
runtime.etext in ctxt.Textp as a work around.
But it seems that the CL forgot to change genasmsym.
As a result, we are generating runtime.text and runtime.etext twice.

Change-Id: If7f8faf496c1c489ffa4804da712f91a3d3f4be4
Reviewed-on: https://go-review.googlesource.com/62810
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 02:30:05 +00:00
Alex Brainman
e27a81221f misc/cgo/testcshared: run tests in parallel
Change-Id: Id1b5939cfcd210a0cb5f61915ce2d077c7fcec11
Reviewed-on: https://go-review.googlesource.com/62592
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-10 23:21:02 +00:00
Hiroshi Ioka
410b73728f cmd/link: remove windows-specific kludges from Adddynrel
Adddynrel does nothing on windows. We can make code don't call Adddynrel
on windows in the first place.

Change-Id: I376cc36d44a5df18bda13be57e3916ca3062f181
Reviewed-on: https://go-review.googlesource.com/62611
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2017-09-10 23:19:52 +00:00
Hiroshi Ioka
8435a746f5 syscall: fix TestCloneNEWUSERAndRemapRootEnableSetgroups on linux
Despite its name, it did the same thing as
TestCloneNEWUSERAndRemapRootDisableSetgroups in old code. So fix it.

Change-Id: I21265e539179c51980e16f07a553a9bf5bb7903f
Reviewed-on: https://go-review.googlesource.com/35273
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2017-09-10 14:00:44 +00:00
David Crawshaw
753bac3a55 misc/cgo/testplugin: pass GO_GCFLAGS
The noopt builder sets GO_GCFLAGS when building the standard library.
Set it when building plugins to ensure the -shared packages built for it
have the same inlining in the export data (and thus the same package
version).

Tested locally with GO_GCFLAGS="-N -l" ./all.bash

Fixes #17937

Change-Id: Id037cfbf4af744c05c47bdc58eea60a5dba69533
Reviewed-on: https://go-review.googlesource.com/62511
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-10 14:00:18 +00:00
Hiroshi Ioka
1134411a83 cmd/go, cmd/link, cmd/dist: re-enable plugin mode on darwin/amd64
1. remove broken verification
   The runtime check assumes that no-pcln symbol entry have zero value,
   but the linker emit no entries if the symbol is no-pcln.
   As a result, if there are no-pcln symbols at the very end of pcln
   table, it will panic.
2. correct condition of export
   Handle special chracters in pluginpath correcty.
   Export "go.itab.*", so different plugins can share the same itab.

Fixes #18190

Change-Id: Ia4f9c51d83ce8488a9470520f1ee9432802cfc1d
Reviewed-on: https://go-review.googlesource.com/61091
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-10 12:54:13 +00:00
Hiroshi Ioka
1053ae5cf5 cmd/internal/goobj: parse native objects in the archive
Also add HasCGO() to internal/testenv for tests.

Updates #21706

Change-Id: I938188047024052bdb42b3ac1a77708f3c2a6dbb
Reviewed-on: https://go-review.googlesource.com/62591
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-10 12:46:44 +00:00
Hiroshi Ioka
d254c61309 cmd/go: check compiler flags per compilers in gccSupportsFlag
Current code always uses a C compilers for checking compiler flags even
for non-C compilers. This CL solves the issue.

Fixes #21736

Change-Id: I5eaddd5fe7d5df699eb2384518b21e6064ca31cf
Reviewed-on: https://go-review.googlesource.com/61270
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-10 10:12:54 +00:00
Hiroshi Ioka
43807e0f47 cmd/internal/goobj: skip tests on some $GOOS/arm
Updates #21817

Change-Id: I77ffaf8a7e54465a5b73691b896edcb20c29440f
Reviewed-on: https://go-review.googlesource.com/62351
Reviewed-by: David du Colombier <0intro@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-10 10:08:55 +00:00
Will Faught
04212a16d0 log: move Ldate doc to general declaration
The Ldate doc refers to all the constants.

Note that I changed "Bits or'ed" to "Bits are or'ed".

Fixes #21810

Change-Id: I82a66b589689e29063a39aa6d56000e00a5ed150
Reviewed-on: https://go-review.googlesource.com/62671
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-10 09:44:30 +00:00
Alex Brainman
d0285161f0 misc/cgo/testcshared: use TestMain
This CL uses TestMain to create and remove
pkg directory and libgo.so file.

Fixes #21531

Change-Id: I833cfb22b55d8eef98348dad4d56327ac4c07b36
Reviewed-on: https://go-review.googlesource.com/57270
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-10 05:15:01 +00:00
Adrian Hesketh
7758abf3b6 time: add a number of new examples
Change-Id: I14d19a3951fcae24e2c2ce2eb76312851e050fdd
Reviewed-on: https://go-review.googlesource.com/61033
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-09 22:00:38 +00:00
Adam Langley
4933da68b5 crypto/x509: store names in signatureAlgorithmDetails.
There is already a table of signature algorithm details so the code
should use it for the name too. This avoids mismatches.

Change-Id: I0d4befbae721ec43db9f87cd93173ec12749e4c8
Reviewed-on: https://go-review.googlesource.com/57210
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-09-09 19:36:51 +00:00
Adam Langley
083ad28622 crypto/x509: get hash information from signatureAlgorithmDetails and check that it matches
signatureAlgorithmDetails already knows the hash function for each
signature algorithm so there's no point in duplicating that. Also, check
that the public key type of the signature algorithm actually matches the
given public key.

Change-Id: I7aab4ea71691fb815d67ba790b721ce02de11b85
Reviewed-on: https://go-review.googlesource.com/57211
Reviewed-by: Adam Langley <agl@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-09-09 19:36:07 +00:00
EKR
0f9a2cf2c4 crypto/tls: fix clientHelloMsg fuzzer not to generate the RI SCSV
It was causing mysterious fuzzing failure because it affects the
unmarshaling of the secureNegotiationSupported field.

Change-Id: Id396b84eab90a3b22fb6e306b10bdd7e39707012
Reviewed-on: https://go-review.googlesource.com/60912
Run-TryBot: Filippo Valsorda <hi@filippo.io>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
2017-09-09 19:24:12 +00:00
Filippo Valsorda
e7d46cee2f crypto/tls: fix and expand TestVerifyPeerCertificate and TestGetClientCertificate
TestGetClientCertificate had disabled verification, and was only passing
because it was mistakenly checking for empty verifiedChains.

Change-Id: Iea0ddbdbbdf8ac34b499569820a2e4ce543a69c7
Reviewed-on: https://go-review.googlesource.com/47430
Run-TryBot: Filippo Valsorda <hi@filippo.io>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
2017-09-09 19:23:45 +00:00
David Crawshaw
06f4d93699 cmd/go: put computed GOROOT in built binaries
As of CL 42533, cmd/go will recompute its GOROOT based on the
location of its own executable. This CL plumbs that computed GOROOT
into every binary it builds using the linker -X flag. This
means binaries built with a moved cmd/go will report the GOROOT
they were built in from runtime.GOROOT().

Fixes #21313

Change-Id: I6c2c559f40f2a0c867ab60cf47c6dbc73ae5e28a
Reviewed-on: https://go-review.googlesource.com/61310
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 16:59:35 +00:00
Michael Munday
ffb4708d1b math: fix Abs, Copysign and Signbit benchmarks
CL 62250 makes constant folding a bit more aggressive and these
benchmarks were optimized away. This CL adds some indirection to
the function arguments to stop them being folded.

The Copysign benchmark is a bit faster because I've left one
argument as a constant and it can be partially folded.

                     old           CL 62250     this CL
Copysign             1.24ns ± 0%   0.34ns ± 2%  1.02ns ± 2%
Abs                  0.67ns ± 0%   0.35ns ± 3%  0.67ns ± 0%
Signbit              0.87ns ± 0%   0.35ns ± 2%  0.87ns ± 1%

Change-Id: I9604465a87d7aa29f4bd6009839c8ee354be3cd7
Reviewed-on: https://go-review.googlesource.com/62450
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 16:52:16 +00:00
David Crawshaw
d8ae2156fe runtime, plugin: error not throw on duplicate open
Along the way, track bad modules. Make sure they don't end up on
the active modules list, and aren't accidentally reprocessed as
new plugins.

Fixes #19004

Change-Id: I8a5e7bb11f572f7b657a97d521a7f84822a35c07
Reviewed-on: https://go-review.googlesource.com/61171
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 16:26:33 +00:00
David Crawshaw
4e2ef7f7f9 cmd/go: add source file contents to plugin hash
It is common to have multiple plugins built from ephemeral
source files all with the same name:

	# generate main.go
	go build -buildmode=plugin -o=p1.so main.go
	# rm main.go, generate new main.go
	go build -buildmode=plugin -o=p2.so main.go
	...

These different plugins currently have the same build ID,
and hence the same package path. This means only one can be
loaded.

To remove this restriction, this commit adds the contents of the
main package source files to the plugin hash.

Fixes #19358

Change-Id: Icd42024b085feb29c09c2771aaecb85f8b528dd3
Reviewed-on: https://go-review.googlesource.com/61170
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 15:58:20 +00:00
Matthew Dempsky
3d7042fba3 cmd/pack: fix export data truncation bug
The binary export data format includes escaping to prevent "\n$$" from
appearing internally, but not "\n!\n". This could result in a false
positive when cmd/pack searched for "\n!\n" as the delimiter between
package definition and linker object.

To address this, this CL changes cmd/pack to also be aware of the
"\n$$" markers, and to ignore "\n!\n" within the export data.

Fixes #21703.

Change-Id: I71ea8ba49dbd066c7afb7717ddc0190e38fe5649
Reviewed-on: https://go-review.googlesource.com/60773
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 14:13:33 +00:00
Than McIntosh
08347648a6 test: add test that caused gccgo incorrect compilation
Updates #21770

Change-Id: Ic31c3bdae30797f406f25c737b83bbe2de1ed1da
Reviewed-on: https://go-review.googlesource.com/62331
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 13:32:23 +00:00
Juan Carlos
a7489ec2cc time: change wording in duration hours example
Change-Id: I86728a1c6c20471beaa3546ca7a43a8edeb9f0b7
Reviewed-on: https://go-review.googlesource.com/50691
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adrian Hesketh <adrianhesketh@hushmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 12:18:42 +00:00
Marvin Stenger
401609c3ff cmd/dist: move functions for the better
This belongs to a series of clean-up changes (see below) for cmd/dist.
This is change (6).

These changes include:
(1)  apply minor fixes
(2)  restore behavior of branchtag
(3)  unleash bootstrap optimization for windows
(4)  use standard generated code header
(5)  remove trivial variables + functions
(6)  move functions for the better
(7)  simplify code segments
(8)  use bytes.Buffer for code generation
(9)  rename variables + functions
(10) remove doc.go

Change-Id: I1c49e3427079194210a6416057100a7e94a37619
Reviewed-on: https://go-review.googlesource.com/61012
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 11:23:41 +00:00
Marvin Stenger
6ea4cfb347 cmd/dist: remove trivial variables + functions
This belongs to a series of clean-up changes (see below) for cmd/dist.
This is change (5).

These changes include:
(1)  apply minor fixes
(2)  restore behavior of branchtag
(3)  unleash bootstrap optimization for windows
(4)  use standard generated code header
(5)  remove trivial variables + functions
(6)  move functions for the better
(7)  simplify code segments
(8)  use bytes.Buffer for code generation
(9)  rename variables + functions
(10) remove doc.go

Change-Id: I0efd1271b6a70bb9248d82f8a4d869556f4a557e
Reviewed-on: https://go-review.googlesource.com/61011
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-09 10:14:25 +00:00