src/StoreStats.cc

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 20    Storage Manager Statistics
   5  *
   6  */
   7
   8 #include "squid.h"
   9 #include "protos.h" /* for xmemset only */
  10 #include "StoreStats.h"
  11
  12
  13 /* StoreInfoStats */
  14
  15 StoreInfoStats::StoreInfoStats()
  16 {
  17     xmemset(this, 0, sizeof(*this));
  18 }
  19
  20 StoreInfoStats &
  21 StoreInfoStats::operator +=(const StoreInfoStats &stats)
  22 {
  23     swap.size += stats.swap.size;
  24     swap.capacity += stats.swap.capacity;
  25     swap.count += stats.swap.count;
  26     swap.open_disk_fd += stats.swap.open_disk_fd;
  27
  28     // Assume that either all workers use shared memory cache or none do.
  29     // It is possible but difficult to report correct stats for an arbitrary
  30     // mix, and only rather unusual deployments can benefit from mixing.
  31
  32     // If workers share memory, we will get shared stats from those workers
  33     // and non-shared stats from other processes. Ignore order and also
  34     // ignore other processes stats because they are zero in most setups.
  35     if (stats.mem.shared) { // workers share memory
  36         // use the latest reported stats, they all should be about the same
  37         mem.shared = true;
  38         mem.size = stats.mem.size;
  39         mem.capacity = stats.mem.capacity;
  40         mem.count = stats.mem.count;
  41     } else if (!mem.shared) { // do not corrupt shared stats, if any
  42         // workers do not share so we must add everything up
  43         mem.size += stats.mem.size;
  44         mem.capacity += stats.mem.capacity;
  45         mem.count += stats.mem.count;
  46     }
  47
  48     store_entry_count += stats.store_entry_count;
  49     mem_object_count += stats.mem_object_count;
  50
  51     return *this;
  52 }
  53
  54
  55
  56 /* StoreIoStats */
  57
  58 StoreIoStats::StoreIoStats()
  59 {
  60     xmemset(this, 0, sizeof(*this));
  61 }
  62