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Remove CPU locking

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This was already accidentally disabled in ba87b08. It also no longer
appears to be beneficial, and in fact slow things down, e.g. when
evaluating a NixOS system configuration:

  elapsed time:       median =      3.8170  mean =      3.8202  stddev =      0.0195  min =      3.7894  max =      3.8600  [rejected, p=0.00000, Δ=0.36929±0.02513]
This commit is contained in:
Eelco Dolstra 2021-12-22 15:49:51 +01:00
parent ddd7839154
commit 9747ea84b4
11 changed files with 5 additions and 100 deletions
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3
src/libutil/thread-pool.cc
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@ -1,13 +1,10 @@
#include "thread-pool.hh"
#include "affinity.hh"
namespace nix {
ThreadPool::ThreadPool(size_t _maxThreads)
: maxThreads(_maxThreads)
{
restoreAffinity(); // FIXME
if (!maxThreads) {
maxThreads = std::thread::hardware_concurrency();
if (!maxThreads) maxThreads = 1;