Rafael Espindola a72e2a9037 Bring r314809 back. ...

But now include a check for CPU_COUNT so we still build on 10 year old
versions of glibc.

Original message:

Use sched_getaffinity instead of std:🧵:hardware_concurrency.

The issue with std:🧵: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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314931 91177308-0d34-0410-b5e6-96231b3b80d8

2017-10-04 20:27:01 +00:00

..

CMakeLists.txt

[CMake] llvm-profdata depends on intrinsics_gen

2016-11-18 23:04:15 +00:00

llvm-profdata.cpp

Bring r314809 back.

2017-10-04 20:27:01 +00:00

LLVMBuild.txt

ProfileData: Introduce the InstrProfReader interface and a text reader

2014-03-21 17:24:48 +00:00