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85a72ed28e
* nix/libstore/build.cc (DerivationGoal::tryBuildHook): Use starts_with instead
of string()
* nix/libstore/builtins.cc (lookupBuiltinBuilder): Same.
* nix/libstore/builtins.hh (isBuiltin): Same and fix indentation of the file.
* nix/libstore/derivations.cc (DerivationOutput::parseHashInfo, isDerivation):
Same and clean header files.
* nix/libstore/gc.cc (addPermRoot, LocalStore::isActiveTempFile): Same.
* nix/libstore/globals.cc: Same.
* nix/libstore/local-store.cc: Same.
* nix/libstore/misc.cc: Same.
* nix/libstore/store-api.cc (checkStoreName): Same.
* nix/libutil/affinity.cc: Same.
* nix/libutil/archive.cc: Same.
* nix/libutil/spawn.cc: Same.
* nix/libutil/util.{cc, hh} (hasSuffix): Removed.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
#include "types.hh"
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#include "util.hh"
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#include "affinity.hh"
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#include <format>
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#if HAVE_SCHED_H
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#include <sched.h>
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#endif
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namespace nix {
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#if HAVE_SCHED_SETAFFINITY
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static bool didSaveAffinity = false;
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static cpu_set_t savedAffinity;
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#endif
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void setAffinityTo(int cpu)
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{
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#if HAVE_SCHED_SETAFFINITY
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if (sched_getaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) return;
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didSaveAffinity = true;
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printMsg(lvlDebug, std::format("locking this thread to CPU {}", cpu));
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cpu_set_t newAffinity;
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CPU_ZERO(&newAffinity);
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CPU_SET(cpu, &newAffinity);
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if (sched_setaffinity(0, sizeof(cpu_set_t), &newAffinity) == -1)
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printMsg(lvlError, std::format("failed to lock thread to CPU {}", cpu));
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#endif
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}
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int lockToCurrentCPU()
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{
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#if HAVE_SCHED_SETAFFINITY
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int cpu = sched_getcpu();
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if (cpu != -1) setAffinityTo(cpu);
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return cpu;
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#else
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return -1;
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#endif
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}
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void restoreAffinity()
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{
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#if HAVE_SCHED_SETAFFINITY
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if (!didSaveAffinity) return;
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if (sched_setaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1)
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printMsg(lvlError, "failed to restore affinity %1%");
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#endif
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}
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}
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