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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2017-10-03 16:25:15 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2017-10-03 16:25:15 +0000 |
| commit | 6e182fbab46d61ea6bef31719fb4524dac85ae9f (patch) | |
| tree | 127149647aa8306e3bbca82fc319407732a2191b /llvm/lib/CodeGen/CodeGen.cpp | |
| parent | c1f906c134feab3d5602e869f0983b8b35f18394 (diff) | |
| download | bcm5719-llvm-6e182fbab46d61ea6bef31719fb4524dac85ae9f.tar.gz bcm5719-llvm-6e182fbab46d61ea6bef31719fb4524dac85ae9f.zip | |
Use sched_getaffinity instead of std::thread::hardware_concurrency.
The issue with std::thread::hardware_concurrency is that it forwards
to libc and some implementations (like glibc) don't take thread
affinity into consideration.
With this change a llvm program that can execute in only 2 cores will
use 2 threads, even if the machine has 32 cores.
This makes benchmarking a lot easier, but should also help if someone
doesn't want to use all cores for compilation for example.
llvm-svn: 314809
Diffstat (limited to 'llvm/lib/CodeGen/CodeGen.cpp')
0 files changed, 0 insertions, 0 deletions
