src/StoreStats.cc

   1 /*
   2  * DEBUG: section 20    Storage Manager Statistics
   3  *
   4  */
   5
   6 #include "squid.h"
   7 #include "tools.h"
   8 #include "StoreStats.h"
   9
  10 /* StoreInfoStats */
  11
  12 StoreInfoStats::StoreInfoStats()
  13 {
  14     xmemset(this, 0, sizeof(*this));
  15 }
  16
  17 StoreInfoStats &
  18 StoreInfoStats::operator +=(const StoreInfoStats &stats)
  19 {
  20     swap.size += stats.swap.size;
  21     swap.capacity += stats.swap.capacity;
  22     swap.count += stats.swap.count;
  23     swap.open_disk_fd += stats.swap.open_disk_fd;
  24
  25     // Assume that either all workers use shared memory cache or none do.
  26     // It is possible but difficult to report correct stats for an arbitrary
  27     // mix, and only rather unusual deployments can benefit from mixing.
  28
  29     // If workers share memory, we will get shared stats from those workers
  30     // and non-shared stats from other processes. Ignore order and also
  31     // ignore other processes stats because they are zero in most setups.
  32     if (stats.mem.shared) { // workers share memory
  33         // use the latest reported stats, they all should be about the same
  34         mem.shared = true;
  35         mem.size = stats.mem.size;
  36         mem.capacity = stats.mem.capacity;
  37         mem.count = stats.mem.count;
  38     } else if (!mem.shared) { // do not corrupt shared stats, if any
  39         // workers do not share so we must add everything up
  40         mem.size += stats.mem.size;
  41         mem.capacity += stats.mem.capacity;
  42         mem.count += stats.mem.count;
  43     }
  44
  45     store_entry_count += stats.store_entry_count;
  46     mem_object_count += stats.mem_object_count;
  47
  48     return *this;
  49 }
  50
  51 /* StoreIoStats */
  52
  53 StoreIoStats::StoreIoStats()
  54 {
  55     xmemset(this, 0, sizeof(*this));
  56 }
  57