src/StoreStats.cc

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 20    Storage Manager Statistics */
  10
  11 #include "squid.h"
  12 #include "StoreStats.h"
  13 #include "tools.h"
  14
  15 StoreInfoStats &
  16 StoreInfoStats::operator +=(const StoreInfoStats &stats)
  17 {
  18     swap.size += stats.swap.size;
  19     swap.capacity += stats.swap.capacity;
  20     swap.count += stats.swap.count;
  21     swap.open_disk_fd += stats.swap.open_disk_fd;
  22
  23     // Assume that either all workers use shared memory cache or none do.
  24     // It is possible but difficult to report correct stats for an arbitrary
  25     // mix, and only rather unusual deployments can benefit from mixing.
  26
  27     // If workers share memory, we will get shared stats from those workers
  28     // and non-shared stats from other processes. Ignore order and also
  29     // ignore other processes stats because they are zero in most setups.
  30     if (stats.mem.shared) { // workers share memory
  31         // use the latest reported stats, they all should be about the same
  32         mem.shared = true;
  33         mem.size = stats.mem.size;
  34         mem.capacity = stats.mem.capacity;
  35         mem.count = stats.mem.count;
  36     } else if (!mem.shared) { // do not corrupt shared stats, if any
  37         // workers do not share so we must add everything up
  38         mem.size += stats.mem.size;
  39         mem.capacity += stats.mem.capacity;
  40         mem.count += stats.mem.count;
  41     }
  42
  43     store_entry_count += stats.store_entry_count;
  44     mem_object_count += stats.mem_object_count;
  45
  46     return *this;
  47 }
  48
  49 /* StoreIoStats */
  50
  51 StoreIoStats::StoreIoStats()
  52 {
  53     memset(this, 0, sizeof(*this));
  54 }
  55