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5 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Austin Clements
|
2010189407 |
runtime: remove legacy eager write barrier
Now that the buffered write barrier is implemented for all architectures, we can remove the old eager write barrier implementation. This CL removes the implementation from the runtime, support in the compiler for calling it, and updates some compiler tests that relied on the old eager barrier support. It also makes sure that all of the useful comments from the old write barrier implementation still have a place to live. Fixes #22460. Updates #21640 since this fixes the layering concerns of the write barrier (but not the other things in that issue). Change-Id: I580f93c152e89607e0a72fe43370237ba97bae74 Reviewed-on: https://go-review.googlesource.com/92705 Run-TryBot: Austin Clements <austin@google.com> Reviewed-by: Rick Hudson <rlh@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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Hugues Bruant
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c4b65fa4cc |
cmd/compile: inline closures with captures
When inlining a closure with captured variables, walk up the param chain to find the one that is defined inside the scope into which the function is being inlined, and map occurrences of the captures to temporary inlvars, similarly to what is done for function parameters. No noticeable impact on compilation speed and binary size. Minor improvements to go1 benchmarks on darwin/amd64 name old time/op new time/op delta BinaryTree17-4 2.59s ± 3% 2.58s ± 1% ~ (p=0.470 n=19+19) Fannkuch11-4 3.15s ± 2% 3.15s ± 1% ~ (p=0.647 n=20+19) FmtFprintfEmpty-4 43.7ns ± 3% 43.4ns ± 4% ~ (p=0.178 n=18+20) FmtFprintfString-4 74.0ns ± 2% 77.1ns ± 7% +4.13% (p=0.000 n=20+20) FmtFprintfInt-4 77.2ns ± 3% 79.2ns ± 6% +2.53% (p=0.000 n=20+20) FmtFprintfIntInt-4 112ns ± 4% 112ns ± 2% ~ (p=0.672 n=20+19) FmtFprintfPrefixedInt-4 136ns ± 1% 135ns ± 2% ~ (p=0.827 n=16+20) FmtFprintfFloat-4 232ns ± 2% 233ns ± 1% ~ (p=0.194 n=20+20) FmtManyArgs-4 490ns ± 2% 484ns ± 2% -1.28% (p=0.001 n=20+20) GobDecode-4 6.68ms ± 2% 6.72ms ± 2% ~ (p=0.113 n=20+19) GobEncode-4 5.62ms ± 2% 5.71ms ± 2% +1.64% (p=0.000 n=20+19) Gzip-4 235ms ± 3% 236ms ± 2% ~ (p=0.607 n=20+19) Gunzip-4 37.1ms ± 2% 36.8ms ± 3% ~ (p=0.060 n=20+20) HTTPClientServer-4 61.9µs ± 2% 62.7µs ± 4% +1.24% (p=0.007 n=18+19) JSONEncode-4 12.5ms ± 2% 12.4ms ± 3% ~ (p=0.192 n=20+20) JSONDecode-4 51.6ms ± 3% 51.0ms ± 3% -1.19% (p=0.008 n=20+19) Mandelbrot200-4 4.12ms ± 6% 4.06ms ± 5% ~ (p=0.063 n=20+20) GoParse-4 3.12ms ± 5% 3.10ms ± 2% ~ (p=0.402 n=19+19) RegexpMatchEasy0_32-4 80.7ns ± 2% 75.1ns ± 9% -6.94% (p=0.000 n=17+20) RegexpMatchEasy0_1K-4 197ns ± 2% 186ns ± 2% -5.43% (p=0.000 n=20+20) RegexpMatchEasy1_32-4 77.5ns ± 4% 71.9ns ± 7% -7.25% (p=0.000 n=20+18) RegexpMatchEasy1_1K-4 341ns ± 3% 341ns ± 3% ~ (p=0.732 n=20+20) RegexpMatchMedium_32-4 113ns ± 2% 112ns ± 3% ~ (p=0.102 n=20+20) RegexpMatchMedium_1K-4 36.6µs ± 2% 35.8µs ± 2% -2.26% (p=0.000 n=18+20) RegexpMatchHard_32-4 1.75µs ± 3% 1.74µs ± 2% ~ (p=0.473 n=20+19) RegexpMatchHard_1K-4 52.6µs ± 2% 52.0µs ± 3% -1.15% (p=0.005 n=20+20) Revcomp-4 381ms ± 4% 377ms ± 2% ~ (p=0.067 n=20+18) Template-4 57.3ms ± 2% 57.7ms ± 2% ~ (p=0.108 n=20+20) TimeParse-4 291ns ± 3% 292ns ± 2% ~ (p=0.585 n=20+20) TimeFormat-4 314ns ± 3% 315ns ± 1% ~ (p=0.681 n=20+20) [Geo mean] 47.4µs 47.1µs -0.73% name old speed new speed delta GobDecode-4 115MB/s ± 2% 114MB/s ± 2% ~ (p=0.115 n=20+19) GobEncode-4 137MB/s ± 2% 134MB/s ± 2% -1.63% (p=0.000 n=20+19) Gzip-4 82.5MB/s ± 3% 82.4MB/s ± 2% ~ (p=0.612 n=20+19) Gunzip-4 523MB/s ± 2% 528MB/s ± 3% ~ (p=0.060 n=20+20) JSONEncode-4 155MB/s ± 2% 156MB/s ± 3% ~ (p=0.192 n=20+20) JSONDecode-4 37.6MB/s ± 3% 38.1MB/s ± 3% +1.21% (p=0.007 n=20+19) GoParse-4 18.6MB/s ± 4% 18.7MB/s ± 2% ~ (p=0.405 n=19+19) RegexpMatchEasy0_32-4 396MB/s ± 2% 426MB/s ± 8% +7.56% (p=0.000 n=17+20) RegexpMatchEasy0_1K-4 5.18GB/s ± 2% 5.48GB/s ± 2% +5.79% (p=0.000 n=20+20) RegexpMatchEasy1_32-4 413MB/s ± 4% 444MB/s ± 6% +7.46% (p=0.000 n=20+19) RegexpMatchEasy1_1K-4 3.00GB/s ± 3% 3.00GB/s ± 3% ~ (p=0.678 n=20+20) RegexpMatchMedium_32-4 8.82MB/s ± 2% 8.90MB/s ± 3% +0.99% (p=0.044 n=20+20) RegexpMatchMedium_1K-4 28.0MB/s ± 2% 28.6MB/s ± 2% +2.32% (p=0.000 n=18+20) RegexpMatchHard_32-4 18.3MB/s ± 3% 18.4MB/s ± 2% ~ (p=0.482 n=20+19) RegexpMatchHard_1K-4 19.5MB/s ± 2% 19.7MB/s ± 3% +1.18% (p=0.004 n=20+20) Revcomp-4 668MB/s ± 4% 674MB/s ± 2% ~ (p=0.066 n=20+18) Template-4 33.8MB/s ± 2% 33.6MB/s ± 2% ~ (p=0.104 n=20+20) [Geo mean] 124MB/s 126MB/s +1.54% Updates #15561 Updates #18270 Change-Id: I980086efe28b36aa27f81577065e2a729ff03d4e Reviewed-on: https://go-review.googlesource.com/72490 Reviewed-by: Hugues Bruant <hugues.bruant@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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Austin Clements
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7e343134d3 |
cmd/compile: compiler support for buffered write barrier
This CL implements the compiler support for calling the buffered write barrier added by the previous CL. Since the buffered write barrier is only implemented on amd64 right now, this still supports the old, eager write barrier as well. There's little overhead to supporting both and this way a few tests in test/fixedbugs that expect to have liveness maps at write barrier calls can easily opt-in to the old, eager barrier. This significantly improves the performance of the write barrier: name old time/op new time/op delta WriteBarrier-12 73.5ns ±20% 19.2ns ±27% -73.90% (p=0.000 n=19+18) It also reduces the size of binaries because the write barrier call is more compact: name old object-bytes new object-bytes delta Template 398k ± 0% 393k ± 0% -1.14% (p=0.008 n=5+5) Unicode 208k ± 0% 206k ± 0% -1.00% (p=0.008 n=5+5) GoTypes 1.18M ± 0% 1.15M ± 0% -2.00% (p=0.008 n=5+5) Compiler 4.05M ± 0% 3.88M ± 0% -4.26% (p=0.008 n=5+5) SSA 8.25M ± 0% 8.11M ± 0% -1.59% (p=0.008 n=5+5) Flate 228k ± 0% 224k ± 0% -1.83% (p=0.008 n=5+5) GoParser 295k ± 0% 284k ± 0% -3.62% (p=0.008 n=5+5) Reflect 1.00M ± 0% 0.99M ± 0% -0.70% (p=0.008 n=5+5) Tar 339k ± 0% 333k ± 0% -1.67% (p=0.008 n=5+5) XML 404k ± 0% 395k ± 0% -2.10% (p=0.008 n=5+5) [Geo mean] 704k 690k -2.00% name old exe-bytes new exe-bytes delta HelloSize 1.05M ± 0% 1.04M ± 0% -1.55% (p=0.008 n=5+5) https://perf.golang.org/search?q=upload:20171027.1 (Amusingly, this also reduces compiler allocations by 0.75%, which, combined with the better write barrier, speeds up the compiler overall by 2.10%. See the perf link.) It slightly improves the performance of most of the go1 benchmarks and improves the performance of the x/benchmarks: name old time/op new time/op delta BinaryTree17-12 2.40s ± 1% 2.47s ± 1% +2.69% (p=0.000 n=19+19) Fannkuch11-12 2.95s ± 0% 2.95s ± 0% +0.21% (p=0.000 n=20+19) FmtFprintfEmpty-12 41.8ns ± 4% 41.4ns ± 2% -1.03% (p=0.014 n=20+20) FmtFprintfString-12 68.7ns ± 2% 67.5ns ± 1% -1.75% (p=0.000 n=20+17) FmtFprintfInt-12 79.0ns ± 3% 77.1ns ± 1% -2.40% (p=0.000 n=19+17) FmtFprintfIntInt-12 127ns ± 1% 123ns ± 3% -3.42% (p=0.000 n=20+20) FmtFprintfPrefixedInt-12 152ns ± 1% 150ns ± 1% -1.02% (p=0.000 n=18+17) FmtFprintfFloat-12 211ns ± 1% 209ns ± 0% -0.99% (p=0.000 n=20+16) FmtManyArgs-12 500ns ± 0% 496ns ± 0% -0.73% (p=0.000 n=17+20) GobDecode-12 6.44ms ± 1% 6.53ms ± 0% +1.28% (p=0.000 n=20+19) GobEncode-12 5.46ms ± 0% 5.46ms ± 1% ~ (p=0.550 n=19+20) Gzip-12 220ms ± 1% 216ms ± 0% -1.75% (p=0.000 n=19+19) Gunzip-12 38.8ms ± 0% 38.6ms ± 0% -0.30% (p=0.000 n=18+19) HTTPClientServer-12 79.0µs ± 1% 78.2µs ± 1% -1.01% (p=0.000 n=20+20) JSONEncode-12 11.9ms ± 0% 11.9ms ± 0% -0.29% (p=0.000 n=20+19) JSONDecode-12 52.6ms ± 0% 52.2ms ± 0% -0.68% (p=0.000 n=19+20) Mandelbrot200-12 3.69ms ± 0% 3.68ms ± 0% -0.36% (p=0.000 n=20+20) GoParse-12 3.13ms ± 1% 3.18ms ± 1% +1.67% (p=0.000 n=19+20) RegexpMatchEasy0_32-12 73.2ns ± 1% 72.3ns ± 1% -1.19% (p=0.000 n=19+18) RegexpMatchEasy0_1K-12 241ns ± 0% 239ns ± 0% -0.83% (p=0.000 n=17+16) RegexpMatchEasy1_32-12 68.6ns ± 1% 69.0ns ± 1% +0.47% (p=0.015 n=18+16) RegexpMatchEasy1_1K-12 364ns ± 0% 361ns ± 0% -0.67% (p=0.000 n=16+17) RegexpMatchMedium_32-12 104ns ± 1% 103ns ± 1% -0.79% (p=0.001 n=20+15) RegexpMatchMedium_1K-12 33.8µs ± 3% 34.0µs ± 2% ~ (p=0.267 n=20+19) RegexpMatchHard_32-12 1.64µs ± 1% 1.62µs ± 2% -1.25% (p=0.000 n=19+18) RegexpMatchHard_1K-12 49.2µs ± 0% 48.7µs ± 1% -0.93% (p=0.000 n=19+18) Revcomp-12 391ms ± 5% 396ms ± 7% ~ (p=0.154 n=19+19) Template-12 63.1ms ± 0% 59.5ms ± 0% -5.76% (p=0.000 n=18+19) TimeParse-12 307ns ± 0% 306ns ± 0% -0.39% (p=0.000 n=19+17) TimeFormat-12 325ns ± 0% 323ns ± 0% -0.50% (p=0.000 n=19+19) [Geo mean] 47.3µs 46.9µs -0.67% https://perf.golang.org/search?q=upload:20171026.1 name old time/op new time/op delta Garbage/benchmem-MB=64-12 2.25ms ± 1% 2.20ms ± 1% -2.31% (p=0.000 n=18+18) HTTP-12 12.6µs ± 0% 12.6µs ± 0% -0.72% (p=0.000 n=18+17) JSON-12 11.0ms ± 0% 11.0ms ± 1% -0.68% (p=0.000 n=17+19) https://perf.golang.org/search?q=upload:20171026.2 Updates #14951. Updates #22460. Change-Id: Id4c0932890a1d41020071bec73b8522b1367d3e7 Reviewed-on: https://go-review.googlesource.com/73712 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> |
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Matthew Dempsky
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f22ef70254 |
cmd/compile: allow := to shadow dot-imported names
Historically, gc optimistically parsed the left-hand side of assignments as expressions. Later, if it discovered a ":=" assignment, it rewrote the parsed expressions as declarations. This failed in the presence of dot imports though, because we lost information about whether an imported object was named via a bare identifier "Foo" or a normal qualified "pkg.Foo". This CL fixes the issue by specially noding the left-hand side of ":=" assignments. Fixes #22076. Change-Id: I18190ecdb863112e7d009e1687e6112eec559921 Reviewed-on: https://go-review.googlesource.com/66810 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Daniel Martí <mvdan@mvdan.cc> Reviewed-by: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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Josh Bleecher Snyder
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61336b78c1 |
cmd/compile: don't update outer variables after capturevars is complete
When compiling concurrently, we walk all functions before compiling any of them. Walking functions can cause variables to switch from being non-addrtaken to addrtaken, e.g. to prepare for a runtime call. Typechecking propagates addrtaken-ness of closure variables to their outer variables, so that capturevars can decide whether to pass the variable's value or a pointer to it. When all functions are compiled immediately, as long as the containing function is compiled prior to the closure, this propagation has no effect. When compilation is deferred, though, in rare cases, this results in a change in the addrtaken-ness of a variable in the outer function, which in turn changes the compiler's output. (This is rare because in a great many cases, a temporary has been introduced, insulating the outer variable from modification.) But concurrent compilation must generate identical results. To fix this, track whether capturevars has run. If it has, there is no need to update outer variables when closure variables change. Capturevars always runs before any functions are walked or compiled. The remainder of the changes in this CL are to support the test. In particular, -d=compilelater forces the compiler to walk all functions before compiling any of them, despite being non-concurrent. This is useful because -live is fundamentally incompatible with concurrent compilation, but we want -c=1 to have no behavior changes. Fixes #20250 Change-Id: I89bcb54268a41e8588af1ac8cc37fbef856a90c2 Reviewed-on: https://go-review.googlesource.com/42853 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> |