[all-commits] [llvm/llvm-project] ab5d65: [llvm-profgen] Ignore stack samples before aggrega...

[ictwanglei via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab5d65e6858b25fc07672a0bd2d07f666bde6b51
      https://github.com/llvm/llvm-project/commit/ab5d65e6858b25fc07672a0bd2d07f666bde6b51
  Author: wlei <wlei at fb.com>
  Date:   2021-10-13 (Wed, 13 Oct 2021)

  Changed paths:
    M llvm/tools/llvm-profgen/PerfReader.cpp

  Log Message:
  -----------
  [llvm-profgen] Ignore stack samples before aggregation

With `ignore-stack-samples`, We can ignore the call stack before the samples aggregation which could reduce some redundant computations.

Reviewed By: hoy, wenlei

Differential Revision: https://reviews.llvm.org/D111577


  Commit: 30ca33eab00b8c815ef95fbb3a14e61dc3278b5b
      https://github.com/llvm/llvm-project/commit/30ca33eab00b8c815ef95fbb3a14e61dc3278b5b
  Author: wlei <wlei at fb.com>
  Date:   2021-10-13 (Wed, 13 Oct 2021)

  Changed paths:
    A llvm/test/tools/llvm-profgen/Inputs/artificial-branch.perfscript
    M llvm/test/tools/llvm-profgen/inline-noprobe2.test
    M llvm/tools/llvm-profgen/PerfReader.cpp

  Log Message:
  -----------
  [llvm-profgen] Ignore the whole trace with the leading external branch

The first LBR entry can be an external branch, we should ignore the whole trace.

```
     7f7448e889e4 0x7f7448e889e4/0x7f7448e88826/P/-/-/1  0x7f7448e8899f/0x7f7448e889d8/P/-/-/4  ...
```

Reviewed By: wenlei, hoy

Differential Revision: https://reviews.llvm.org/D111749


Compare: https://github.com/llvm/llvm-project/compare/4fcc0ac15e05...30ca33eab00b