better perf support for JIT code
References:
https://lwn.net/Articles/638566/
https://v8.dev/docs/linux-perf
https://cs.chromium.org/chromium/src/v8/src/diagnostics/perf-jit.cc
https://lore.kernel.org/patchwork/patch/622240/
Usage:
ninja -C out dm nanobench
perf record -k 1 out/nanobench -m SkVM_4096_I32\$
perf inject -j -i perf.data -o perf.data.jit
perf report -i perf.data.jit
Percent│
│
│
│ Disassembly of section .text:
│
│ 0000000000000040 <skvm-jit-8e8f2c67>:
│ skvm-jit-8e8f2c67():
│ vbroadcastss 0xd3(%rip),%ymm0 # 11c <skvm-jit-8e8f2c67+0xdc>
0.35 │ 9: vmovups (%rsi),%ymm1
1.54 │ vandps %ymm0,%ymm2,%ymm2
3.41 │ vpsrld $0x8,%ymm1,%ymm3
0.26 │ vandps %ymm0,%ymm3,%ymm3
0.55 │ vpsrld $0x10,%ymm1,%ymm4
1.63 │ vandps %ymm0,%ymm4,%ymm4
2.84 │ vpsrld $0x18,%ymm1,%ymm1
0.46 │ vandps %ymm0,%ymm1,%ymm1
0.17 │ vmovups (%rdx),%ymm5
1.51 │ vandps %ymm0,%ymm6,%ymm6
3.31 │ vpsrld $0x8,%ymm5,%ymm7
0.38 │ vandps %ymm0,%ymm7,%ymm7
0.28 │ vpsrld $0x10,%ymm5,%ymm8
2.30 │ vandps %ymm0,%ymm8,%ymm8
3.32 │ vpsrld $0x18,%ymm5,%ymm5
0.47 │ vandps %ymm0,%ymm5,%ymm5
0.64 │ vpsubd %ymm1,%ymm0,%ymm9
12.49 │ vpmulld %ymm9,%ymm6,%ymm6
1.19 │ vpaddd %ymm6,%ymm6,%ymm6
8.75 │ vpsrad $0x8,%ymm6,%ymm6
1.40 │ vpaddd %ymm2,%ymm6,%ymm6
1.42 │ vpmulld %ymm9,%ymm7,%ymm7
4.06 │ vpaddd %ymm7,%ymm7,%ymm7
2.55 │ vpsrad $0x8,%ymm7,%ymm7
2.14 │ vpaddd %ymm3,%ymm7,%ymm7
2.57 │ vpmulld %ymm9,%ymm8,%ymm8
1.28 │ vpaddd %ymm8,%ymm8,%ymm8
2.85 │ vpsrad $0x8,%ymm8,%ymm8
0.41 │ vpaddd %ymm4,%ymm8,%ymm8
2.52 │ vpmulld %ymm9,%ymm5,%ymm9
3.88 │ vpaddd %ymm5,%ymm9,%ymm9
1.90 │ vpsrad $0x8,%ymm9,%ymm9
2.83 │ vpaddd %ymm1,%ymm9,%ymm9
1.43 │ vpslld $0x8,%ymm7,%ymm7
4.35 │ vorps %ymm6,%ymm7,%ymm7
3.08 │ vpslld $0x8,%ymm9,%ymm9
1.71 │ vorps %ymm8,%ymm9,%ymm9
3.58 │ vpslld $0x10,%ymm9,%ymm9
3.37 │ vorps %ymm7,%ymm9,%ymm9
1.01 │ vmovups %ymm9,(%rdx)
0.37 │ sub $0x8,%rdi
1.73 │ add $0x20,%rsi
3.27 │ add $0x20,%rdx
│ cmp $0x7,%rdi
0.40 │ ↑ jg 9
│ vzeroupper
0.05 │ ← retq
│ xchg %ax,%ax
│ incl (%rax)
│ ...
Change-Id: Ibac83c92748139f7579c198ff09edf5564d2138e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/220316
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
7760112e01