digraph "Guix bag" { "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" [label = "glibc-intermediate-2.24", shape = box, fontname = Helvetica]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/wx8ifbb7x22cl4998fyldsr24fcv18j3-texinfo-6.3.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/ccj3as3258l70lmphi48hs7n017wv75s-perl-boot0-5.24.0.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/w9adgzgdqkwz0w13zxf2fn363v9wcllc-gcc-cross-boot0-4.9.4.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/72snmrnjphwjxffknjhzm3xg38wd08al-ld-wrapper-x86_64-guix-linux-gnu-0.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/v1v7jp438hc5rpgriwpjp04x049vh0g4-binutils-cross-boot0-2.27.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/1jpld53g41rzv2bmjp6v9mckmyw75vs3-make-boot0-4.2.1.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/zpphawi07xidhfs2dja3w7hmnfp99j02-diffutils-boot0-3.5.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/m4900ip34w4rcgn5620iqdi1wv198d9s-findutils-boot0-4.6.0.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/nwzyr3xskw0ms8cndffsfvhvm5xz96pc-file-boot0-5.28.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/store/wda0p45jlbzg6w9j8zxw2sd11n2a4pbv-glibc-bootstrap-0.drv" [color = magenta]; "/gnu/store/aymf6jlxxpwgr71rkiz24m646nqsyii6-glibc-intermediate-2.24.drv" -> "/gnu/st
#include "types.hh" #include "util.hh" #include "affinity.hh" #if HAVE_SCHED_H #include <sched.h> #endif namespace nix { #if HAVE_SCHED_SETAFFINITY static bool didSaveAffinity = false; static cpu_set_t savedAffinity; #endif void setAffinityTo(int cpu) { #if HAVE_SCHED_SETAFFINITY if (sched_getaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) return; didSaveAffinity = true; printMsg(lvlDebug, format("locking this thread to CPU %1%") % cpu); cpu_set_t newAffinity; CPU_ZERO(&newAffinity); CPU_SET(cpu, &newAffinity); if (sched_setaffinity(0, sizeof(cpu_set_t), &newAffinity) == -1) printMsg(lvlError, format("failed to lock thread to CPU %1%") % cpu); #endif } int lockToCurrentCPU() { #if HAVE_SCHED_SETAFFINITY int cpu = sched_getcpu(); if (cpu != -1) setAffinityTo(cpu); return cpu; #else return -1; #endif } void restoreAffinity() { #if HAVE_SCHED_SETAFFINITY if (!didSaveAffinity) return; if (sched_setaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) printMsg(lvlError, "failed to restore affinity %1%"); #endif } }