| commit | fb20e7a1b0a7f33451d233ee6572fbd3bdd58d55 | |
| author | Giuseppe Ottaviano <ott@fb.com> | |
| Thu, 26 May 2022 14:27:34 +0000 (26 07:27 -0700) | ||
| committer | Facebook GitHub Bot <facebook-github-bot@users.noreply.github.com> | |
| Thu, 26 May 2022 14:27:34 +0000 (26 07:27 -0700) | ||
| tree | 490cb2d649b620e386de9b22d08eb20660c90086 | treesnapshot (tar.gz zip) |
| parent | 4a4b923bae917ad2581dfb4b51ccd741699ee5c6 | commitdiff |
Switch to SharedMutex in SharedProfileEntry
Summary: `std::mutex` is 40 bytes, so that leaves only 24 bytes in the cache line for `value`, and in addition it's not easily inlineable, so switch to `SharedMutex`, which is only 4 bytes (though likely to take 8 due to alignment).
Reviewed By: mofarrell
Differential Revision: D36567527
fbshipit-source-id: 3ab63a87ad81600490389cdd2f96b52ead43d71e
Summary: `std::mutex` is 40 bytes, so that leaves only 24 bytes in the cache line for `value`, and in addition it's not easily inlineable, so switch to `SharedMutex`, which is only 4 bytes (though likely to take 8 due to alignment).
Reviewed By: mofarrell
Differential Revision: D36567527
fbshipit-source-id: 3ab63a87ad81600490389cdd2f96b52ead43d71e
| hphp/runtime/vm/jit/shared-profile.cpp | diffblobblamehistory | |
| hphp/runtime/vm/jit/shared-profile.h | diffblobblamehistory |