- 23 Mar, 2017 9 commits
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Keith Randall authored
Regalloc uses loop depths - make sure they are initialized! Test to make sure we aren't pushing spills into loops. This fixes a generated-code performance bug introduced with the better spill placement change: https://go-review.googlesource.com/c/34822/ Update #19595 Change-Id: Ib9f0da6fb588503518847d7aab51e569fd3fa61e Reviewed-on: https://go-review.googlesource.com/38434Reviewed-by:
David Chase <drchase@google.com>
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Keith Randall authored
We want to merge a load and op into a single instruction l = LOAD ptr mem y = OP x l into y = OPload x ptr mem However, all of our OPload instructions require that y uses the same register as x. If x is needed past this instruction, then we must copy x somewhere else, losing the whole benefit of merging the instructions in the first place. Disable this optimization if x is live past the OP. Also disable this optimization if the OP is in a deeper loop than the load. Update #19595 Change-Id: I87f596aad7e91c9127bfb4705cbae47106e1e77a Reviewed-on: https://go-review.googlesource.com/38337Reviewed-by:Ilya Tocar <ilya.tocar@intel.com>
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Ben Shi authored
As #19357 reported, TST has 3 different sub forms TST $imme, Rx TST Ry << imme, Rx TST Ry << Rz, Rx just like CMP/CMN/TEQ has. But current arm assembler assembles all TST instructions wrongly. This patch fixes it and adds more tests. Fixes #19357 Change-Id: Iafedccfaab2cbb2631e7acf259837a782e2e8e2f Reviewed-on: https://go-review.googlesource.com/37662 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Brad Fitzpatrick authored
It was already marked flaky for everything but the dashboard. Remove that restriction. It's just flaky overall. It's doing more harm than good. Updates #13324 Change-Id: I36feff32a1b8681e77700f74b9c70cb4073268eb Reviewed-on: https://go-review.googlesource.com/38459 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Josh Bleecher Snyder <josharian@gmail.com>
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Robert Griesemer authored
Fixes #19667. Change-Id: Iaa71e2020af123c1bd3ac25e0b760956688e8bdf Reviewed-on: https://go-review.googlesource.com/38458 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Dave Cheney authored
exporter.nesting was added in c7b9bd74 to mitigate #16369 which was closed in ee272bbf. Remove the exporter.nesting field as it is now unused. Change-Id: I07873d1a07d6a08b11994b817a1483ffc2f5e45f Reviewed-on: https://go-review.googlesource.com/38490 Run-TryBot: Dave Cheney <dave@cheney.net> Reviewed-by:
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Dave Cheney authored
CL 38446 introduced the use of the sys.ArchFamily type into the cmd/internal/obj/mips package and redefined the mips.Mips32 and mips.Mips64 constants in terms of their sys.ArchFamily counterparts. This CL removes these local declarations and consolidates on sys.MIPS and sys.MIPS64 respectively. Change-Id: Id7aab6c7fd0de42ff43dde605df6bd4c85a3d895 Reviewed-on: https://go-review.googlesource.com/38287Reviewed-by:
Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Martin Möhrmann authored
The step method implementations check directly if the next rune only needs one byte to be decoded and avoid calling utf8.DecodeRune for such ASCII characters. Introduce the same fast path optimization for rune decoding for the context methods. Results for regexp benchmarks that use the context methods: name old time/op new time/op delta AnchoredLiteralShortNonMatch-4 97.5ns ± 1% 94.8ns ± 2% -2.80% (p=0.000 n=45+43) AnchoredShortMatch-4 163ns ± 1% 160ns ± 1% -1.84% (p=0.000 n=46+47) NotOnePassShortA-4 742ns ± 2% 742ns ± 2% ~ (p=0.440 n=49+50) NotOnePassShortB-4 535ns ± 1% 533ns ± 2% -0.37% (p=0.005 n=46+48) OnePassLongPrefix-4 169ns ± 2% 166ns ± 2% -2.06% (p=0.000 n=50+49) Change-Id: Ib302d9e8c63333f02695369fcf9963974362e335 Reviewed-on: https://go-review.googlesource.com/38256Reviewed-by:
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haya14busa authored
There were no allocations in regexp.Match for *non* onepass regex because m.matchcap length is reset to zero (ncap=0 for regexp.Match). But, as for onepass regex, m.matchcap length remains as it is even when ncap=0 and it leads needless allocations. benchmark old ns/op new ns/op delta BenchmarkMatch_onepass_regex/32-4 6465 4628 -28.41% BenchmarkMatch_onepass_regex/1K-4 208324 151558 -27.25% BenchmarkMatch_onepass_regex/32K-4 7230259 5834492 -19.30% BenchmarkMatch_onepass_regex/1M-4 234379810 166310682 -29.04% BenchmarkMatch_onepass_regex/32M-4 7903529363 4981119950 -36.98% benchmark old MB/s new MB/s speedup BenchmarkMatch_onepass_regex/32-4 4.95 6.91 1.40x BenchmarkMatch_onepass_regex/1K-4 4.92 6.76 1.37x BenchmarkMatch_onepass_regex/32K-4 4.53 5.62 1.24x BenchmarkMatch_onepass_regex/1M-4 4.47 6.30 1.41x BenchmarkMatch_onepass_regex/32M-4 4.25 6.74 1.59x benchmark old allocs new allocs delta BenchmarkMatch_onepass_regex/32-4 32 0 -100.00% BenchmarkMatch_onepass_regex/1K-4 1024 0 -100.00% BenchmarkMatch_onepass_regex/32K-4 32768 0 -100.00% BenchmarkMatch_onepass_regex/1M-4 1048576 0 -100.00% BenchmarkMatch_onepass_regex/32M-4 104559255 0 -100.00% benchmark old bytes new bytes delta BenchmarkMatch_onepass_regex/32-4 512 0 -100.00% BenchmarkMatch_onepass_regex/1K-4 16384 0 -100.00% BenchmarkMatch_onepass_regex/32K-4 524288 0 -100.00% BenchmarkMatch_onepass_regex/1M-4 16777216 0 -100.00% BenchmarkMatch_onepass_regex/32M-4 2019458128 0 -100.00% Fixes #19573 Change-Id: I033982d0003ebb0360bb40b92eb3941c781ec74d Reviewed-on: https://go-review.googlesource.com/38270 Run-TryBot: Michael Matloob <matloob@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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- 22 Mar, 2017 25 commits
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Richard Musiol authored
This greatly improves the latency of starting a child process when the Go process is using a lot of memory. Even though the kernel uses copy-on-write, preparation for that can take up to several 100ms under certain conditions. All other goroutines are suspended while starting a subprocess so this latency directly affects total throughput. With CLONE_VM the child process shares the same memory with the parent process. On its own this would lead to conflicting use of the same memory, so CLONE_VFORK is used to suspend the parent process until the child releases the memory when switching to to the new program binary via the exec syscall. When the parent process continues to run, one has to consider the changes to memory that the child process did, namely the return address of the syscall function needs to be restored from a register. A simple benchmark has shown a difference in latency of 16ms vs. 0.5ms at 10GB memory usage. However, much higher latencies of several 100ms have been observed in real world scenarios. For more information see comments on #5838. Fixes #5838 Change-Id: I6377d7bd8dcd00c85ca0c52b6683e70ce2174ba6 Reviewed-on: https://go-review.googlesource.com/37439Reviewed-by:
Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Sarah Adams authored
When unmarshaling, if an element is empty, eg. '<tag></tag>', and destination type is int, uint, float or bool, do not attempt to parse value (""). Set to its zero value instead. Fixes #13417 Change-Id: I2d79f6d8f39192bb277b1a9129727d5abbb2dd1f Reviewed-on: https://go-review.googlesource.com/38386Reviewed-by: -
Kenny Grant authored
The DefaultServeMux included in net/http uses a map to store routes, but iterates all keys for every request to allow longer paths. This change checks the map for an exact match first. To check performance was better, BenchmarkServeMux has been added - this adds >100 routes and checks the matches. Exact matches are faster and more predictable on this benchmark and on most existing package benchmarks. https://perf.golang.org/search?q=upload:20170312.1 ServeMux-4 2.02ms ± 2% 0.04ms ± 2% −98.08% (p=0.004 n=5+6) https://perf.golang.org/search?q=upload:20170312.2 ReadRequestChrome-4 184MB/s ± 8% 186MB/s ± 1% ~ ReadRequestCurl-4 45.0MB/s ± 1% 46.2MB/s ± 1% +2.71% Read...Apachebench-4 45.8MB/s ±13% 48.7MB/s ± 1% ~ ReadRequestSiege-4 63.6MB/s ± 5% 69.2MB/s ± 1% +8.75% ReadRequestWrk-4 30.9MB/s ± 9% 34.4MB/s ± 2% +11.25% Change-Id: I8afafcb956f07197419d545a9f1c03ecaa307384 Reviewed-on: https://go-review.googlesource.com/38057Reviewed-by:
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Robert Griesemer authored
This simplifies the code and removes a premature optimization. It increases the amount of allocated syntax.Node space by ~0.4% for parsing all of std lib, which is negligible. Before the change (best of 5 runs): $ go test -run StdLib -fast parsed 1517022 lines (3394 files) in 793.487886ms (1911840 lines/s) allocated 387.086Mb (267B/line, 487.828Mb/s) After the change (best of 5 runs): $ go test -run StdLib -fast parsed 1516911 lines (3392 files) in 805.028655ms (1884294 lines/s) allocated 388.466Mb (268B/line, 482.549Mb/s) Change-Id: Id19d6210fdc62393862ba3b04913352d95c599be Reviewed-on: https://go-review.googlesource.com/38439 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Robert Griesemer authored
This change adds position information for { and } braces in the source. There's a 1.9% increase in memory use for syntax.Nodes, which is negligible relative to overall compiler memory consumption. Parsing the std library (using syntax package only) and memory consumption before this change (fastest of 5 runs): $ go test -run StdLib -fast parsed 1516827 lines (3392 files) in 780.612335ms (1943124 lines/s) allocated 379.903Mb (486.673Mb/s) After this change (fastest of 5 runs): $ go test -run StdLib -fast parsed 1517022 lines (3394 files) in 793.487886ms (1911840 lines/s) allocated 387.086Mb (267B/line, 487.828Mb/s) While not an exact apples-to-apples comparison (the syntax package has changed and is also parsed), the overall impact is small. Also: Small improvements to nodes_test.go. Change-Id: Ib8a7f90bbe79de33d83684e33b1bf8dbc32e644a Reviewed-on: https://go-review.googlesource.com/38435Reviewed-by: -
Sam Whited authored
Change-Id: I2d155c838935cd8427abd142a462ff4c56829715 Reviewed-on: https://go-review.googlesource.com/37948Reviewed-by:
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Josselin Costanzi authored
Change-Id: Ia739337dc9961422982912cc6a669022559fb991 Reviewed-on: https://go-review.googlesource.com/38365Reviewed-by:
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Josh Bleecher Snyder authored
Preparation for eliminating Prog-related globals. Passes toolstash-check -all. Updates #15756 Change-Id: Ia199fcb282cc3a84903a6e92a3ce342c5faba79c Reviewed-on: https://go-review.googlesource.com/38409 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Carlos Eduardo Seo authored
Starting in go1.9, the minimum processor requirement for ppc64 is POWER8. Therefore, the checks for OldArch and the code enabled by it are not necessary anymore. Updates #19074 Change-Id: I33d6a78b2462c80d57c5dbcba2e13424630afab4 Reviewed-on: https://go-review.googlesource.com/38404 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Carlos Eduardo Seo authored
Starting in go1.9, the minimum processor requirement for ppc64 is POWER8. This means the checks for GOARCH_ppc64 in asm_ppc64x.s can be removed, since we can assume LBAR and STBCCC instructions (both from ISA 2.06) will always be available. Updates #19074 Change-Id: Ib4418169cd9fc6f871a5ab126b28ee58a2f349e2 Reviewed-on: https://go-review.googlesource.com/38406Reviewed-by:
Lynn Boger <laboger@linux.vnet.ibm.com> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Matthew Dempsky authored
Change-Id: Ie22a08c93dfcfd4b336e7b158415448dd55b2c11 Reviewed-on: https://go-review.googlesource.com/38407 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by:
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Josh Bleecher Snyder authored
Asmode is always set to p.Mode, which is always set based on the arch family. Instead, use the arch family directly. Passes toolstash-check -all. Change-Id: Id982472dcc8eeb6dd22cac5ad2f116b54a44caee Reviewed-on: https://go-review.googlesource.com/38451 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
Replace Ctxt.Mode with a method, Ctxt.RegWidth, which is calculated directly off the arch info. I believe that Prog.Mode can also be removed; future CL. This is a step towards obj.Link immutability. Passes toolstash-check -all. Updates #15756 Change-Id: Ifd7f8f6ed0a2fdc032d1dd306fcd695a14aa5bc5 Reviewed-on: https://go-review.googlesource.com/38446 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
Step one in eliminating Prog-related globals. Passes toolstash-check -all. Updates #15756 Change-Id: I3b777fb5a7716f2d9da3067fbd94c28ca894a465 Reviewed-on: https://go-review.googlesource.com/38450 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Alan Donovan authored
Fixes golang/go#19656 Change-Id: Ied20d3f25b6e147cc693a1dd1aeb9480adc6687e Reviewed-on: https://go-review.googlesource.com/38405Reviewed-by:
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Mikio Hara authored
TestOnlyWriteTimeout assumes wrongly that: - the Accept method of trackLastConnListener is called only once - the shared variable conn never becomes nil and crashes on some circumstances. Updates #19032. Change-Id: I61de22618cd90b84a2b6401afdb6e5d9b3336b12 Reviewed-on: https://go-review.googlesource.com/36735 Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
To enable this, inline the call to nod and simplify. Eliminates a reference to lineno from the backend. Passes toolstash-check -all. Updates #15756 Change-Id: I9c4bd77d10d727aa8f5e6c6bb16b0e05de165631 Reviewed-on: https://go-review.googlesource.com/38441 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
Add docs. Reduce indentation. Passes toolstash-check -all. Change-Id: I968d1af25989886ae9945052e05e211a107dde9c Reviewed-on: https://go-review.googlesource.com/38443 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Aliaksandr Valialkin authored
Benchmark results for GOARCH=amd64: name old time/op new time/op delta FormatInt-4 2.51µs ± 2% 2.40µs ± 2% -4.51% (p=0.000 n=9+10) AppendInt-4 1.67µs ± 2% 1.61µs ± 3% -3.74% (p=0.000 n=9+9) FormatUint-4 698ns ± 2% 643ns ± 3% -7.95% (p=0.000 n=10+8) AppendUint-4 478ns ± 1% 418ns ± 2% -12.61% (p=0.000 n=8+10) AppendUintVarlen/1-4 9.30ns ± 6% 9.15ns ± 1% ~ (p=0.199 n=9+10) AppendUintVarlen/12-4 9.12ns ± 0% 9.16ns ± 2% ~ (p=0.307 n=9+9) AppendUintVarlen/123-4 18.6ns ± 2% 18.7ns ± 0% ~ (p=0.091 n=10+6) AppendUintVarlen/1234-4 19.1ns ± 4% 17.7ns ± 1% -7.35% (p=0.000 n=10+9) AppendUintVarlen/12345-4 21.5ns ± 3% 20.7ns ± 3% -3.78% (p=0.002 n=9+10) AppendUintVarlen/123456-4 23.5ns ± 3% 20.9ns ± 1% -11.14% (p=0.000 n=10+9) AppendUintVarlen/1234567-4 25.0ns ± 2% 23.6ns ± 7% -5.48% (p=0.004 n=9+10) AppendUintVarlen/12345678-4 26.8ns ± 2% 23.4ns ± 2% -12.79% (p=0.000 n=9+10) AppendUintVarlen/123456789-4 29.8ns ± 3% 26.5ns ± 5% -11.03% (p=0.000 n=10+10) AppendUintVarlen/1234567890-4 31.6ns ± 3% 26.9ns ± 3% -14.95% (p=0.000 n=10+9) AppendUintVarlen/12345678901-4 33.8ns ± 3% 29.3ns ± 5% -13.21% (p=0.000 n=10+10) AppendUintVarlen/123456789012-4 35.5ns ± 4% 29.2ns ± 4% -17.82% (p=0.000 n=10+10) AppendUintVarlen/1234567890123-4 37.6ns ± 4% 31.4ns ± 3% -16.48% (p=0.000 n=10+10) AppendUintVarlen/12345678901234-4 39.8ns ± 6% 32.0ns ± 7% -19.60% (p=0.000 n=10+10) AppendUintVarlen/123456789012345-4 40.7ns ± 0% 34.4ns ± 4% -15.55% (p=0.000 n=6+10) AppendUintVarlen/1234567890123456-4 45.4ns ± 6% 35.1ns ± 4% -22.66% (p=0.000 n=10+10) AppendUintVarlen/12345678901234567-4 45.1ns ± 1% 36.7ns ± 4% -18.77% (p=0.000 n=9+10) AppendUintVarlen/123456789012345678-4 46.9ns ± 0% 36.4ns ± 3% -22.49% (p=0.000 n=9+10) AppendUintVarlen/1234567890123456789-4 50.6ns ± 6% 38.8ns ± 3% -23.28% (p=0.000 n=10+10) AppendUintVarlen/12345678901234567890-4 51.3ns ± 2% 38.4ns ± 0% -25.00% (p=0.000 n=9+8) Benchmark results for GOARCH=386: name old time/op new time/op delta FormatInt-4 6.21µs ± 0% 6.14µs ± 0% -1.11% (p=0.008 n=5+5) AppendInt-4 4.95µs ± 0% 4.85µs ± 0% -1.99% (p=0.016 n=5+4) FormatUint-4 1.89µs ± 1% 1.83µs ± 1% -2.94% (p=0.008 n=5+5) AppendUint-4 1.59µs ± 0% 1.57µs ± 2% -1.72% (p=0.040 n=5+5) FormatIntSmall-4 8.48ns ± 0% 8.48ns ± 0% ~ (p=0.905 n=5+5) AppendIntSmall-4 12.2ns ± 0% 12.2ns ± 0% ~ (all equal) AppendUintVarlen/1-4 10.6ns ± 1% 10.7ns ± 0% ~ (p=0.238 n=5+4) AppendUintVarlen/12-4 10.7ns ± 0% 10.7ns ± 1% ~ (p=0.333 n=4+5) AppendUintVarlen/123-4 29.9ns ± 1% 30.2ns ± 0% +1.07% (p=0.016 n=5+4) AppendUintVarlen/1234-4 32.4ns ± 1% 30.4ns ± 0% -6.30% (p=0.008 n=5+5) AppendUintVarlen/12345-4 35.1ns ± 2% 34.9ns ± 0% ~ (p=0.238 n=5+5) AppendUintVarlen/123456-4 36.6ns ± 0% 35.3ns ± 0% -3.55% (p=0.029 n=4+4) AppendUintVarlen/1234567-4 38.9ns ± 0% 39.6ns ± 0% +1.80% (p=0.029 n=4+4) AppendUintVarlen/12345678-4 41.3ns ± 0% 40.1ns ± 0% -2.91% (p=0.000 n=5+4) AppendUintVarlen/123456789-4 44.9ns ± 1% 44.8ns ± 0% ~ (p=0.667 n=5+5) AppendUintVarlen/1234567890-4 65.6ns ± 0% 66.2ns ± 1% +0.88% (p=0.016 n=4+5) AppendUintVarlen/12345678901-4 77.9ns ± 0% 76.3ns ± 0% -2.00% (p=0.000 n=4+5) AppendUintVarlen/123456789012-4 80.7ns ± 0% 79.1ns ± 1% -2.01% (p=0.008 n=5+5) AppendUintVarlen/1234567890123-4 83.6ns ± 0% 80.2ns ± 1% -4.07% (p=0.008 n=5+5) AppendUintVarlen/12345678901234-4 86.2ns ± 1% 83.3ns ± 0% -3.39% (p=0.008 n=5+5) AppendUintVarlen/123456789012345-4 88.5ns ± 0% 83.7ns ± 0% -5.42% (p=0.008 n=5+5) AppendUintVarlen/1234567890123456-4 90.6ns ± 0% 88.3ns ± 0% -2.54% (p=0.008 n=5+5) AppendUintVarlen/12345678901234567-4 92.7ns ± 0% 89.0ns ± 1% -4.01% (p=0.008 n=5+5) AppendUintVarlen/123456789012345678-4 95.6ns ± 1% 92.6ns ± 0% -3.18% (p=0.016 n=5+4) AppendUintVarlen/1234567890123456789-4 118ns ± 0% 114ns ± 0% ~ (p=0.079 n=4+5) AppendUintVarlen/12345678901234567890-4 138ns ± 0% 136ns ± 0% -1.45% (p=0.008 n=5+5) Updates #19445 Change-Id: Iafbe5c074898187c150dc3854e5b9fc19c10be05 Reviewed-on: https://go-review.googlesource.com/38255 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Robert Griesemer <gri@golang.org>
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Josh Bleecher Snyder authored
Coalesce identical cases. Give it a proper doc comment. Fix comment locations. Update/delete old comments. Passes toolstash-check -all. Change-Id: I88d9cf20e6e04b0c1c6583e92cd96335831f183f Reviewed-on: https://go-review.googlesource.com/38442 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Dave Cheney <dave@cheney.net> Reviewed-by:
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Josh Bleecher Snyder authored
AMODE appears to have been intended to allow a Prog to switch between 16 (!), 32, or 64 bit x86. It is unused anywhere in the tree. Passes toolstash-check -all. Updates #15756 Change-Id: Ic57b257cfe580f29dad81d97e4193bf3c330c598 Reviewed-on: https://go-review.googlesource.com/38445 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josh Bleecher Snyder authored
None of the following code uses it. Passes toolstash-check -all. Updates #15756 Change-Id: Ieeaaca8ba31e5c345c0c8a758d520b24be88e173 Reviewed-on: https://go-review.googlesource.com/38444 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Rob Pike authored
By analogy with the handling of methods on types, show the documentation for a single field of a struct. % go doc ast.structtype.fields struct StructType { Fields *FieldList // list of field declarations } % Fixes #19169. Change-Id: I002f992e4aa64bee667e2e4bccc7082486149842 Reviewed-on: https://go-review.googlesource.com/38438Reviewed-by: -
Jason Travis authored
Change-Id: Iaca02660bdc8262db2b003a94aca661b5cec5576 Reviewed-on: https://go-review.googlesource.com/38437Reviewed-by:
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Josh Bleecher Snyder authored
The only new Types that the backend introduces are pointers to Types generated by the frontend. Usually, when we generate a *T, we cache the resulting Type in T, to avoid recreating it later. However, that caching is not concurrency safe. Rather than add mutexes, this CL disables that caching before starting the backend. The backend generates few enough new *Ts that the performance impact of this is small, particularly if we pre-create some commonly used *Ts. Updates #15756 name old alloc/op new alloc/op delta Template 40.3MB ± 0% 40.4MB ± 0% +0.18% (p=0.001 n=10+10) Unicode 29.8MB ± 0% 29.8MB ± 0% +0.11% (p=0.043 n=10+9) GoTypes 114MB ± 0% 115MB ± 0% +0.33% (p=0.000 n=9+10) SSA 855MB ± 0% 859MB ± 0% +0.40% (p=0.000 n=10+10) Flate 25.7MB ± 0% 25.8MB ± 0% +0.35% (p=0.000 n=10+10) GoParser 31.9MB ± 0% 32.1MB ± 0% +0.58% (p=0.000 n=10+10) Reflect 79.6MB ± 0% 79.9MB ± 0% +0.31% (p=0.000 n=10+10) Tar 26.9MB ± 0% 26.9MB ± 0% +0.21% (p=0.000 n=10+10) XML 42.5MB ± 0% 42.7MB ± 0% +0.52% (p=0.000 n=10+9) name old allocs/op new allocs/op delta Template 394k ± 1% 393k ± 0% ~ (p=0.529 n=10+10) Unicode 319k ± 1% 319k ± 0% ~ (p=0.720 n=10+9) GoTypes 1.15M ± 0% 1.15M ± 0% +0.14% (p=0.035 n=10+10) SSA 7.53M ± 0% 7.56M ± 0% +0.45% (p=0.000 n=9+10) Flate 238k ± 0% 238k ± 1% ~ (p=0.579 n=10+10) GoParser 318k ± 1% 320k ± 1% +0.64% (p=0.001 n=10+10) Reflect 1.00M ± 0% 1.00M ± 0% ~ (p=0.393 n=10+10) Tar 254k ± 0% 254k ± 1% ~ (p=0.075 n=10+10) XML 395k ± 0% 397k ± 0% +0.44% (p=0.001 n=10+9) Change-Id: I6c031ed4f39108f26969c5712b73aa2fc08cd10a Reviewed-on: https://go-review.googlesource.com/38417 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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- 21 Mar, 2017 6 commits
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Brad Fitzpatrick authored
I broke FreeBSD 9 in https://golang.org/cl/38426 by using Pipe2. We still want to support FreeBSD 9 for one last release (Go 1.9 will be the last), and FreeBSD 9 doesn't have Pipe2. So this still uses Pipe2, but falls back to Pipe on error. Updates #18854 Updates #19072 Change-Id: I1de90fb83606c93fb84b4b86fba31e207a702835 Reviewed-on: https://go-review.googlesource.com/38430Reviewed-by:
Rob Pike <r@golang.org> Reviewed-by:
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Matthew Dempsky authored
Must have been lost when rebasing the SSA liveness CLs. Change-Id: Iaac33158cc7c92ea44a023c242eb914a7d6979c6 Reviewed-on: https://go-review.googlesource.com/38427 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Josselin Costanzi authored
Use SSE/AVX2 when counting a single byte. Inspired from runtime indexbyte implementation. Benchmark against previous implementation, where 1 byte in every 8 is the one we are looking for: * On a machine without AVX2 name old time/op new time/op delta CountSingle/10-4 61.8ns ±10% 15.6ns ±11% -74.83% (p=0.000 n=10+10) CountSingle/32-4 100ns ± 4% 17ns ±10% -82.54% (p=0.000 n=10+9) CountSingle/4K-4 9.66µs ± 3% 0.37µs ± 6% -96.21% (p=0.000 n=10+10) CountSingle/4M-4 11.0ms ± 6% 0.4ms ± 4% -96.04% (p=0.000 n=10+10) CountSingle/64M-4 194ms ± 8% 8ms ± 2% -95.64% (p=0.000 n=10+10) name old speed new speed delta CountSingle/10-4 162MB/s ±10% 645MB/s ±10% +297.00% (p=0.000 n=10+10) CountSingle/32-4 321MB/s ± 5% 1844MB/s ± 9% +474.79% (p=0.000 n=10+9) CountSingle/4K-4 424MB/s ± 3% 11169MB/s ± 6% +2533.10% (p=0.000 n=10+10) CountSingle/4M-4 381MB/s ± 7% 9609MB/s ± 4% +2421.88% (p=0.000 n=10+10) CountSingle/64M-4 346MB/s ± 7% 7924MB/s ± 2% +2188.78% (p=0.000 n=10+10) * On a machine with AVX2 name old time/op new time/op delta CountSingle/10-8 37.1ns ± 3% 8.2ns ± 1% -77.80% (p=0.000 n=10+10) CountSingle/32-8 66.1ns ± 3% 9.8ns ± 2% -85.23% (p=0.000 n=10+10) CountSingle/4K-8 7.36µs ± 3% 0.11µs ± 1% -98.54% (p=0.000 n=10+10) CountSingle/4M-8 7.46ms ± 2% 0.15ms ± 2% -97.95% (p=0.000 n=10+9) CountSingle/64M-8 124ms ± 2% 6ms ± 4% -95.09% (p=0.000 n=10+10) name old speed new speed delta CountSingle/10-8 269MB/s ± 3% 1213MB/s ± 1% +350.32% (p=0.000 n=10+10) CountSingle/32-8 484MB/s ± 4% 3277MB/s ± 2% +576.66% (p=0.000 n=10+10) CountSingle/4K-8 556MB/s ± 3% 37933MB/s ± 1% +6718.36% (p=0.000 n=10+10) CountSingle/4M-8 562MB/s ± 2% 27444MB/s ± 3% +4783.43% (p=0.000 n=10+9) CountSingle/64M-8 543MB/s ± 2% 11054MB/s ± 3% +1935.81% (p=0.000 n=10+10) Fixes #19411 Change-Id: Ieaf20b1fabccabe767c55c66e242e86f3617f883 Reviewed-on: https://go-review.googlesource.com/38258 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Keith Randall <khr@golang.org>
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Brad Fitzpatrick authored
The pipe2 syscall exists in all officially supported FreeBSD versions: 10, 11 and future 12. The pipe syscall no longer exists in 11 and 12. To build and run Go on these versions, kernel needs COMPAT_FREEBSD10 option. Based on Gleb Smirnoff's https://golang.org/cl/38422 Fixes #18854 Change-Id: I8e201ee1b15dca10427c3093b966025d160aaf61 Reviewed-on: https://go-review.googlesource.com/38426 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
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Matthew Dempsky authored
Updates #19632. Change-Id: I1411dd997c8c6a789d17d0dcc0bfbd2281447b16 Reviewed-on: https://go-review.googlesource.com/38401 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by:
Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Josh Bleecher Snyder authored
It's easier to grep output than recompile the compiler anyway. For concurrent compilation. Updates #15756 Change-Id: I151cb5dc77056469cd9019d516f86454e931a197 Reviewed-on: https://go-review.googlesource.com/38424 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
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