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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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8
src/libstore/remote-store.cc
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@ -5,7 +5,6 @@
#include "remote-store.hh"
#include "worker-protocol.hh"
#include "archive.hh"
#include "affinity.hh"
#include "globals.hh"
#include "derivations.hh"
#include "pool.hh"
@ -184,11 +183,8 @@ void RemoteStore::initConnection(Connection & conn)
conn.to << PROTOCOL_VERSION;
if (GET_PROTOCOL_MINOR(conn.daemonVersion) >= 14) {
int cpu = sameMachine() && settings.lockCPU ? lockToCurrentCPU() : -1;
if (cpu != -1)
conn.to << 1 << cpu;
else
conn.to << 0;
// Obsolete CPU affinity.
conn.to << 0;
}
if (GET_PROTOCOL_MINOR(conn.daemonVersion) >= 11)