src/CpuAffinity.cc

   1 /*
   2  * DEBUG: section 54    Interprocess Communication
   3  */
   4
   5 #include "squid.h"
   6 #include "base/TextException.h"
   7 #include "CpuAffinity.h"
   8 #include "CpuAffinityMap.h"
   9 #include "CpuAffinitySet.h"
  10 #include "Debug.h"
  11 #include "globals.h"
  12 #include "SquidConfig.h"
  13 #include "structs.h"
  14 #include "tools.h"
  15
  16 #include <algorithm>
  17
  18 static CpuAffinitySet *TheCpuAffinitySet = NULL;
  19
  20 void
  21 CpuAffinityInit()
  22 {
  23     Must(!TheCpuAffinitySet);
  24     if (Config.cpuAffinityMap) {
  25         const int processNumber = InDaemonMode() ? KidIdentifier : 1;
  26         TheCpuAffinitySet = Config.cpuAffinityMap->calculateSet(processNumber);
  27         if (TheCpuAffinitySet)
  28             TheCpuAffinitySet->apply();
  29     }
  30 }
  31
  32 void
  33 CpuAffinityReconfigure()
  34 {
  35     if (TheCpuAffinitySet) {
  36         TheCpuAffinitySet->undo();
  37         delete TheCpuAffinitySet;
  38         TheCpuAffinitySet = NULL;
  39     }
  40     CpuAffinityInit();
  41 }
  42
  43 void
  44 CpuAffinityCheck()
  45 {
  46     if (Config.cpuAffinityMap) {
  47         Must(!Config.cpuAffinityMap->processes().empty());
  48         const int maxProcess =
  49             *std::max_element(Config.cpuAffinityMap->processes().begin(),
  50                               Config.cpuAffinityMap->processes().end());
  51
  52         // in no-deamon mode, there is one process regardless of squid.conf
  53         const int numberOfProcesses = InDaemonMode() ? NumberOfKids() : 1;
  54
  55         if (maxProcess > numberOfProcesses) {
  56             debugs(54, DBG_IMPORTANT, "WARNING: 'cpu_affinity_map' has "
  57                    "non-existing process number(s)");
  58         }
  59     }
  60 }