tree 40dbf78bc52f21f632ccdd49845f7ac29ca19569
parent b4d3a830062c5af0e3a3482cd2a8f083913eb68d
author rafael <rafael> 1507047915 +0000
committer rafael <rafael> 1507047915 +0000

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.

git-svn-id: svn://svn.chromium.org/llvm-project/llvm/trunk/lib/Fuzzer@314809 0b72dbe1-c17f-4bc7-b9db-2b4152be0356