src/DiskIO/DiskDaemon/DiskDaemonDiskIOModule.cc

   1
   2 /*
   3  * $Id: DiskDaemonDiskIOModule.cc,v 1.4 2007/04/12 19:37:24 wessels Exp $
   4  *
   5  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   6  * ----------------------------------------------------------
   7  *
   8  *  Squid is the result of efforts by numerous individuals from
   9  *  the Internet community; see the CONTRIBUTORS file for full
  10  *  details.   Many organizations have provided support for Squid's
  11  *  development; see the SPONSORS file for full details.  Squid is
  12  *  Copyrighted (C) 2001 by the Regents of the University of
  13  *  California; see the COPYRIGHT file for full details.  Squid
  14  *  incorporates software developed and/or copyrighted by other
  15  *  sources; see the CREDITS file for full details.
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  30  *
  31  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  32  */
  33
  34 #include "squid.h"
  35 #include "DiskDaemonDiskIOModule.h"
  36 #include "CacheManager.h"
  37 #include "DiskdIOStrategy.h"
  38 #include "Store.h"
  39
  40 DiskDaemonDiskIOModule::DiskDaemonDiskIOModule() : initialised(false)
  41 {
  42     ModuleAdd(*this);
  43 }
  44
  45 DiskDaemonDiskIOModule &
  46 DiskDaemonDiskIOModule::GetInstance()
  47 {
  48     return Instance;
  49 }
  50
  51 void
  52 DiskDaemonDiskIOModule::init()
  53 {
  54     /* We may be reused - for instance in coss - eventually.
  55      * When we do, we either need per-using-module stats (
  56      * no singleton pattern), or we need to refcount the
  57      * initialisation level and handle multiple clients.
  58      * RBC - 20030718.
  59      */
  60     assert(!initialised);
  61     memset(&diskd_stats, '\0', sizeof(diskd_stats));
  62 #if 0
  63     /*
  64      * DPW 2007-04-12
  65      * No debugging here please because this method is called before
  66      * the debug log is configured and we'll get the message on
  67      * stderr when doing things like 'squid -k reconfigure'
  68      */
  69     debugs(47, 1, "diskd started");
  70 #endif
  71     initialised = true;
  72
  73     registerWithCacheManager();
  74 }
  75
  76 void
  77 DiskDaemonDiskIOModule::registerWithCacheManager(void)
  78 {
  79     CacheManager::GetInstance()->registerAction("diskd", "DISKD Stats", Stats, 0, 1);
  80 }
  81
  82 void
  83 DiskDaemonDiskIOModule::shutdown()
  84 {
  85     initialised = false;
  86 }
  87
  88 DiskIOStrategy *
  89 DiskDaemonDiskIOModule::createStrategy()
  90 {
  91     return new DiskdIOStrategy();
  92 }
  93
  94 DiskDaemonDiskIOModule DiskDaemonDiskIOModule::Instance;
  95
  96 void
  97 DiskDaemonDiskIOModule::Stats(StoreEntry * sentry)
  98 {
  99     storeAppendPrintf(sentry, "sent_count: %d\n", diskd_stats.sent_count);
 100     storeAppendPrintf(sentry, "recv_count: %d\n", diskd_stats.recv_count);
 101     storeAppendPrintf(sentry, "max_away: %d\n", diskd_stats.max_away);
 102     storeAppendPrintf(sentry, "max_shmuse: %d\n", diskd_stats.max_shmuse);
 103     storeAppendPrintf(sentry, "open_fail_queue_len: %d\n", diskd_stats.open_fail_queue_len);
 104     storeAppendPrintf(sentry, "block_queue_len: %d\n", diskd_stats.block_queue_len);
 105     diskd_stats.max_away = diskd_stats.max_shmuse = 0;
 106     storeAppendPrintf(sentry, "\n              OPS   SUCCESS    FAIL\n");
 107     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 108                       "open", diskd_stats.open.ops, diskd_stats.open.success, diskd_stats.open.fail);
 109     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 110                       "create", diskd_stats.create.ops, diskd_stats.create.success, diskd_stats.create.fail);
 111     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 112                       "close", diskd_stats.close.ops, diskd_stats.close.success, diskd_stats.close.fail);
 113     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 114                       "unlink", diskd_stats.unlink.ops, diskd_stats.unlink.success, diskd_stats.unlink.fail);
 115     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 116                       "read", diskd_stats.read.ops, diskd_stats.read.success, diskd_stats.read.fail);
 117     storeAppendPrintf(sentry, "%7s %9d %9d %7d\n",
 118                       "write", diskd_stats.write.ops, diskd_stats.write.success, diskd_stats.write.fail);
 119 }
 120
 121 char const *
 122 DiskDaemonDiskIOModule::type () const
 123 {
 124     return "DiskDaemon";
 125 }