root/dev/raidframe/rf_acctrace.c

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DEFINITIONS

This source file includes following definitions.
  1. rf_ShutdownAccessTrace
  2. rf_ConfigureAccessTrace
  3. rf_LogTraceRec
  4. rf_FlushAccessTraceBuf

    1 /*      $OpenBSD: rf_acctrace.c,v 1.4 2002/12/16 07:01:02 tdeval Exp $  */
    2 /*      $NetBSD: rf_acctrace.c,v 1.4 1999/08/13 03:41:52 oster Exp $    */
    3 
    4 /*
    5  * Copyright (c) 1995 Carnegie-Mellon University.
    6  * All rights reserved.
    7  *
    8  * Author: Mark Holland
    9  *
   10  * Permission to use, copy, modify and distribute this software and
   11  * its documentation is hereby granted, provided that both the copyright
   12  * notice and this permission notice appear in all copies of the
   13  * software, derivative works or modified versions, and any portions
   14  * thereof, and that both notices appear in supporting documentation.
   15  *
   16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   18  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   19  *
   20  * Carnegie Mellon requests users of this software to return to
   21  *
   22  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   23  *  School of Computer Science
   24  *  Carnegie Mellon University
   25  *  Pittsburgh PA 15213-3890
   26  *
   27  * any improvements or extensions that they make and grant Carnegie the
   28  * rights to redistribute these changes.
   29  */
   30 
   31 /*****************************************************************************
   32  *
   33  * acctrace.c -- Code to support collecting information about each access.
   34  *
   35  *****************************************************************************/
   36 
   37 
   38 #include <sys/stat.h>
   39 #include <sys/types.h>
   40 
   41 #include "rf_threadstuff.h"
   42 #include "rf_types.h"
   43 #include "rf_debugMem.h"
   44 #include "rf_acctrace.h"
   45 #include "rf_general.h"
   46 #include "rf_raid.h"
   47 #include "rf_etimer.h"
   48 #include "rf_hist.h"
   49 #include "rf_shutdown.h"
   50 
   51 static long numTracesSoFar;
   52 static int accessTraceBufCount = 0;
   53 static RF_AccTraceEntry_t *access_tracebuf;
   54 static long traceCount;
   55 
   56 int     rf_stopCollectingTraces;
   57 RF_DECLARE_MUTEX(rf_tracing_mutex);
   58 int     rf_trace_fd;
   59 
   60 void rf_ShutdownAccessTrace(void *);
   61 
   62 void
   63 rf_ShutdownAccessTrace(void *ignored)
   64 {
   65         if (rf_accessTraceBufSize) {
   66                 if (accessTraceBufCount)
   67                         rf_FlushAccessTraceBuf();
   68                 RF_Free(access_tracebuf, rf_accessTraceBufSize *
   69                     sizeof(RF_AccTraceEntry_t));
   70         }
   71         rf_mutex_destroy(&rf_tracing_mutex);
   72 }
   73 
   74 int
   75 rf_ConfigureAccessTrace(RF_ShutdownList_t **listp)
   76 {
   77         int rc;
   78 
   79         numTracesSoFar = accessTraceBufCount = rf_stopCollectingTraces = 0;
   80         if (rf_accessTraceBufSize) {
   81                 RF_Malloc(access_tracebuf, rf_accessTraceBufSize *
   82                     sizeof(RF_AccTraceEntry_t), (RF_AccTraceEntry_t *));
   83                 accessTraceBufCount = 0;
   84         }
   85         traceCount = 0;
   86         numTracesSoFar = 0;
   87         rc = rf_mutex_init(&rf_tracing_mutex);
   88         if (rc) {
   89                 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d.\n",
   90                     __FILE__, __LINE__, rc);
   91         }
   92         rc = rf_ShutdownCreate(listp, rf_ShutdownAccessTrace, NULL);
   93         if (rc) {
   94                 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d"
   95                     " rc=%d.\n", __FILE__, __LINE__, rc);
   96                 if (rf_accessTraceBufSize) {
   97                         RF_Free(access_tracebuf, rf_accessTraceBufSize *
   98                             sizeof(RF_AccTraceEntry_t));
   99                         rf_mutex_destroy(&rf_tracing_mutex);
  100                 }
  101         }
  102         return (rc);
  103 }
  104 
  105 /*
  106  * Install a trace record. Cause a flush to disk or to the trace collector
  107  * daemon if the trace buffer is at least 1/2 full.
  108  */
  109 void
  110 rf_LogTraceRec(RF_Raid_t *raid, RF_AccTraceEntry_t *rec)
  111 {
  112         RF_AccTotals_t *acc = &raid->acc_totals;
  113 #if 0
  114         RF_Etimer_t timer;
  115         int     i, n;
  116 #endif
  117 
  118         if (rf_stopCollectingTraces || ((rf_maxNumTraces >= 0) &&
  119             (numTracesSoFar >= rf_maxNumTraces)))
  120                 return;
  121 
  122         /* Update AccTotals for this device. */
  123         if (!raid->keep_acc_totals)
  124                 return;
  125 
  126         acc->num_log_ents++;
  127         if (rec->reconacc) {
  128                 acc->recon_start_to_fetch_us +=
  129                     rec->specific.recon.recon_start_to_fetch_us;
  130                 acc->recon_fetch_to_return_us +=
  131                     rec->specific.recon.recon_fetch_to_return_us;
  132                 acc->recon_return_to_submit_us +=
  133                     rec->specific.recon.recon_return_to_submit_us;
  134                 acc->recon_num_phys_ios += rec->num_phys_ios;
  135                 acc->recon_phys_io_us += rec->phys_io_us;
  136                 acc->recon_diskwait_us += rec->diskwait_us;
  137                 acc->recon_reccount++;
  138         } else {
  139                 RF_HIST_ADD(acc->tot_hist, rec->total_us);
  140                 RF_HIST_ADD(acc->dw_hist, rec->diskwait_us);
  141                 /*
  142                  * Count of physical IOs that are too big. (often due to
  143                  * thermal recalibration)
  144                  *
  145                  * If bigvals > 0, you should probably ignore this data set.
  146                  */
  147                 if (rec->diskwait_us > 100000)
  148                         acc->bigvals++;
  149 
  150                 acc->total_us += rec->total_us;
  151                 acc->suspend_ovhd_us += rec->specific.user.suspend_ovhd_us;
  152                 acc->map_us += rec->specific.user.map_us;
  153                 acc->lock_us += rec->specific.user.lock_us;
  154                 acc->dag_create_us += rec->specific.user.dag_create_us;
  155                 acc->dag_retry_us += rec->specific.user.dag_retry_us;
  156                 acc->exec_us += rec->specific.user.exec_us;
  157                 acc->cleanup_us += rec->specific.user.cleanup_us;
  158                 acc->exec_engine_us += rec->specific.user.exec_engine_us;
  159                 acc->xor_us += rec->xor_us;
  160                 acc->q_us += rec->q_us;
  161                 acc->plog_us += rec->plog_us;
  162                 acc->diskqueue_us += rec->diskqueue_us;
  163                 acc->diskwait_us += rec->diskwait_us;
  164                 acc->num_phys_ios += rec->num_phys_ios;
  165                 acc->phys_io_us = rec->phys_io_us;
  166                 acc->user_reccount++;
  167         }
  168 }
  169 
  170 
  171 /*
  172  * Assumes the tracing mutex is locked at entry. In order to allow this to
  173  * be called from interrupt context, we don't do any copyouts here, but rather
  174  * just wake the trace buffer collector thread.
  175  */
  176 void
  177 rf_FlushAccessTraceBuf(void)
  178 {
  179         accessTraceBufCount = 0;
  180 }

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