src/CpuAffinity.cc

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 54    Interprocess Communication
   5  *
   6  */
   7
   8 #include "squid.h"
   9 #include "base/TextException.h"
  10 #include "CpuAffinity.h"
  11 #include "CpuAffinityMap.h"
  12 #include "CpuAffinitySet.h"
  13 #include "Debug.h"
  14 #include "protos.h"
  15 #include "structs.h"
  16
  17 #include <algorithm>
  18
  19 static CpuAffinitySet *TheCpuAffinitySet = NULL;
  20
  21 void
  22 CpuAffinityInit()
  23 {
  24     Must(!TheCpuAffinitySet);
  25     if (Config.cpuAffinityMap) {
  26         const int processNumber = InDaemonMode() ? KidIdentifier : 1;
  27         TheCpuAffinitySet = Config.cpuAffinityMap->calculateSet(processNumber);
  28         if (TheCpuAffinitySet)
  29             TheCpuAffinitySet->apply();
  30     }
  31 }
  32
  33 void
  34 CpuAffinityReconfigure()
  35 {
  36     if (TheCpuAffinitySet) {
  37         TheCpuAffinitySet->undo();
  38         delete TheCpuAffinitySet;
  39         TheCpuAffinitySet = NULL;
  40     }
  41     CpuAffinityInit();
  42 }
  43
  44 void
  45 CpuAffinityCheck()
  46 {
  47     if (Config.cpuAffinityMap) {
  48         Must(!Config.cpuAffinityMap->processes().empty());
  49         const int maxProcess =
  50             *std::max_element(Config.cpuAffinityMap->processes().begin(),
  51                               Config.cpuAffinityMap->processes().end());
  52
  53         // in no-deamon mode, there is one process regardless of squid.conf
  54         const int numberOfProcesses = InDaemonMode() ? NumberOfKids() : 1;
  55
  56         if (maxProcess > numberOfProcesses) {
  57             debugs(54, DBG_IMPORTANT, "WARNING: 'cpu_affinity_map' has "
  58                    "non-existing process number(s)");
  59         }
  60     }
  61 }