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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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4
src/libutil/util.cc
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@ -1,5 +1,4 @@
#include "util.hh"
#include "affinity.hh"
#include "sync.hh"
#include "finally.hh"
#include "serialise.hh"
@ -1004,7 +1003,6 @@ pid_t startProcess(std::function<void()> fun, const ProcessOptions & options)
if (options.dieWithParent && prctl(PR_SET_PDEATHSIG, SIGKILL) == -1)
throw SysError("setting death signal");
#endif
restoreAffinity();
fun();
} catch (std::exception & e) {
try {
@ -1675,8 +1673,6 @@ void restoreProcessContext(bool restoreMounts)
restoreMountNamespace();
}
restoreAffinity();
#if __linux__
if (savedStackSize) {
struct rlimit limit;