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/* $OpenBSD: rf_acctrace.c,v 1.4 2002/12/16 07:01:02 tdeval Exp $ */
/* $NetBSD: rf_acctrace.c,v 1.4 1999/08/13 03:41:52 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*****************************************************************************
*
* acctrace.c -- Code to support collecting information about each access.
*
*****************************************************************************/
#include <sys/stat.h>
#include <sys/types.h>
#include "rf_threadstuff.h"
#include "rf_types.h"
#include "rf_debugMem.h"
#include "rf_acctrace.h"
#include "rf_general.h"
#include "rf_raid.h"
#include "rf_etimer.h"
#include "rf_hist.h"
#include "rf_shutdown.h"
static long numTracesSoFar;
static int accessTraceBufCount = 0;
static RF_AccTraceEntry_t *access_tracebuf;
static long traceCount;
int rf_stopCollectingTraces;
RF_DECLARE_MUTEX(rf_tracing_mutex);
int rf_trace_fd;
void rf_ShutdownAccessTrace(void *);
void
rf_ShutdownAccessTrace(void *ignored)
{
if (rf_accessTraceBufSize) {
if (accessTraceBufCount)
rf_FlushAccessTraceBuf();
RF_Free(access_tracebuf, rf_accessTraceBufSize *
sizeof(RF_AccTraceEntry_t));
}
rf_mutex_destroy(&rf_tracing_mutex);
}
int
rf_ConfigureAccessTrace(RF_ShutdownList_t **listp)
{
int rc;
numTracesSoFar = accessTraceBufCount = rf_stopCollectingTraces = 0;
if (rf_accessTraceBufSize) {
RF_Malloc(access_tracebuf, rf_accessTraceBufSize *
sizeof(RF_AccTraceEntry_t), (RF_AccTraceEntry_t *));
accessTraceBufCount = 0;
}
traceCount = 0;
numTracesSoFar = 0;
rc = rf_mutex_init(&rf_tracing_mutex);
if (rc) {
RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d.\n",
__FILE__, __LINE__, rc);
}
rc = rf_ShutdownCreate(listp, rf_ShutdownAccessTrace, NULL);
if (rc) {
RF_ERRORMSG3("Unable to add to shutdown list file %s line %d"
" rc=%d.\n", __FILE__, __LINE__, rc);
if (rf_accessTraceBufSize) {
RF_Free(access_tracebuf, rf_accessTraceBufSize *
sizeof(RF_AccTraceEntry_t));
rf_mutex_destroy(&rf_tracing_mutex);
}
}
return (rc);
}
/*
* Install a trace record. Cause a flush to disk or to the trace collector
* daemon if the trace buffer is at least 1/2 full.
*/
void
rf_LogTraceRec(RF_Raid_t *raid, RF_AccTraceEntry_t *rec)
{
RF_AccTotals_t *acc = &raid->acc_totals;
#if 0
RF_Etimer_t timer;
int i, n;
#endif
if (rf_stopCollectingTraces || ((rf_maxNumTraces >= 0) &&
(numTracesSoFar >= rf_maxNumTraces)))
return;
/* Update AccTotals for this device. */
if (!raid->keep_acc_totals)
return;
acc->num_log_ents++;
if (rec->reconacc) {
acc->recon_start_to_fetch_us +=
rec->specific.recon.recon_start_to_fetch_us;
acc->recon_fetch_to_return_us +=
rec->specific.recon.recon_fetch_to_return_us;
acc->recon_return_to_submit_us +=
rec->specific.recon.recon_return_to_submit_us;
acc->recon_num_phys_ios += rec->num_phys_ios;
acc->recon_phys_io_us += rec->phys_io_us;
acc->recon_diskwait_us += rec->diskwait_us;
acc->recon_reccount++;
} else {
RF_HIST_ADD(acc->tot_hist, rec->total_us);
RF_HIST_ADD(acc->dw_hist, rec->diskwait_us);
/*
* Count of physical IOs that are too big. (often due to
* thermal recalibration)
*
* If bigvals > 0, you should probably ignore this data set.
*/
if (rec->diskwait_us > 100000)
acc->bigvals++;
acc->total_us += rec->total_us;
acc->suspend_ovhd_us += rec->specific.user.suspend_ovhd_us;
acc->map_us += rec->specific.user.map_us;
acc->lock_us += rec->specific.user.lock_us;
acc->dag_create_us += rec->specific.user.dag_create_us;
acc->dag_retry_us += rec->specific.user.dag_retry_us;
acc->exec_us += rec->specific.user.exec_us;
acc->cleanup_us += rec->specific.user.cleanup_us;
acc->exec_engine_us += rec->specific.user.exec_engine_us;
acc->xor_us += rec->xor_us;
acc->q_us += rec->q_us;
acc->plog_us += rec->plog_us;
acc->diskqueue_us += rec->diskqueue_us;
acc->diskwait_us += rec->diskwait_us;
acc->num_phys_ios += rec->num_phys_ios;
acc->phys_io_us = rec->phys_io_us;
acc->user_reccount++;
}
}
/*
* Assumes the tracing mutex is locked at entry. In order to allow this to
* be called from interrupt context, we don't do any copyouts here, but rather
* just wake the trace buffer collector thread.
*/
void
rf_FlushAccessTraceBuf(void)
{
accessTraceBufCount = 0;
}
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