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NetBSD/sys/dev/raidframe/rf_acctrace.c

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/* $NetBSD: rf_acctrace.c,v 1.1 1998/11/13 04:20:26 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
*
*****************************************************************************/
/* :
* Log: rf_acctrace.c,v
* Revision 1.29 1996/07/27 23:36:08 jimz
* Solaris port of simulator
*
* Revision 1.28 1996/07/17 21:00:58 jimz
* clean up timer interface, tracing
*
* Revision 1.27 1996/06/14 14:35:24 jimz
* clean up dfstrace protection
*
* Revision 1.26 1996/06/13 19:09:04 jimz
* remove trace.dat file before beginning
*
* Revision 1.25 1996/06/12 04:41:26 jimz
* tweaks to make genplot work with user-level driver
* (mainly change stat collection)
*
* Revision 1.24 1996/06/10 11:55:47 jimz
* Straightened out some per-array/not-per-array distinctions, fixed
* a couple bugs related to confusion. Added shutdown lists. Removed
* layout shutdown function (now subsumed by shutdown lists).
*
* Revision 1.23 1996/06/09 02:36:46 jimz
* lots of little crufty cleanup- fixup whitespace
* issues, comment #ifdefs, improve typing in some
* places (esp size-related)
*
* Revision 1.22 1996/06/05 18:06:02 jimz
* Major code cleanup. The Great Renaming is now done.
* Better modularity. Better typing. Fixed a bunch of
* synchronization bugs. Made a lot of global stuff
* per-desc or per-array. Removed dead code.
*
* Revision 1.21 1996/05/31 22:26:54 jimz
* fix a lot of mapping problems, memory allocation problems
* found some weird lock issues, fixed 'em
* more code cleanup
*
* Revision 1.20 1996/05/30 23:22:16 jimz
* bugfixes of serialization, timing problems
* more cleanup
*
* Revision 1.19 1996/05/30 12:59:18 jimz
* make etimer happier, more portable
*
* Revision 1.18 1996/05/27 18:56:37 jimz
* more code cleanup
* better typing
* compiles in all 3 environments
*
* Revision 1.17 1996/05/23 00:33:23 jimz
* code cleanup: move all debug decls to rf_options.c, all extern
* debug decls to rf_options.h, all debug vars preceded by rf_
*
* Revision 1.16 1996/05/20 16:15:49 jimz
* switch to rf_{mutex,cond}_{init,destroy}
*
* Revision 1.15 1996/05/18 20:10:00 jimz
* bit of cleanup to compile cleanly in kernel, once again
*
* Revision 1.14 1996/05/18 19:51:34 jimz
* major code cleanup- fix syntax, make some types consistent,
* add prototypes, clean out dead code, et cetera
*
* Revision 1.13 1995/11/30 16:26:43 wvcii
* added copyright info
*
*/
#ifdef _KERNEL
#define KERNEL
#endif
#include "rf_threadstuff.h"
#include "rf_types.h"
#include <sys/stat.h>
#include <sys/types.h>
#ifdef KERNEL
#ifndef __NetBSD__
#include <dfstrace.h>
#endif /* !__NetBSD__ */
#if DFSTRACE > 0
#include <sys/dfs_log.h>
#include <sys/dfstracebuf.h>
#endif /* DFSTRACE > 0 */
#endif /* KERNEL */
#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"
#include "rf_sys.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;
static void rf_ShutdownAccessTrace(void *);
static void rf_ShutdownAccessTrace(ignored)
void *ignored;
{
if (rf_accessTraceBufSize) {
if (accessTraceBufCount) rf_FlushAccessTraceBuf();
#ifndef KERNEL
close(rf_trace_fd);
#endif /* !KERNEL */
RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t));
}
rf_mutex_destroy(&rf_tracing_mutex);
#if defined(KERNEL) && DFSTRACE > 0
printf("RAIDFRAME: %d trace entries were sent to dfstrace\n",traceCount);
#endif /* KERNEL && DFSTRACE > 0 */
}
int rf_ConfigureAccessTrace(listp)
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;
#ifndef KERNEL
rc = unlink("trace.dat");
if (rc && (errno != ENOENT)) {
perror("unlink");
RF_ERRORMSG("Unable to remove existing trace.dat\n");
return(errno);
}
if ((rf_trace_fd = open("trace.dat",O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0 ) {
perror("Unable to open trace.dat for output");
return(errno);
}
#endif /* !KERNEL */
}
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));
#ifndef KERNEL
close(rf_trace_fd);
#endif /* !KERNEL */
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(raid, rec)
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;
#ifndef KERNEL
if (rf_accessTraceBufSize) {
RF_LOCK_MUTEX(rf_tracing_mutex);
numTracesSoFar++;
bcopy((char *)rec, (char *)&access_tracebuf[ accessTraceBufCount++ ], sizeof(RF_AccTraceEntry_t));
if (accessTraceBufCount == rf_accessTraceBufSize)
rf_FlushAccessTraceBuf();
RF_UNLOCK_MUTEX(rf_tracing_mutex);
}
#endif /* !KERNEL */
#if defined(KERNEL) && DFSTRACE > 0
rec->index = traceCount++;
if (traceon & DFS_TRACE_RAIDFRAME) {
dfs_log(DFS_NOTE, (char *) rec, (int) sizeof(*rec), 0);
}
#endif /* KERNEL && DFSTRACE > 0 */
/* 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 which 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 trace
* buffer collector thread.
*/
void rf_FlushAccessTraceBuf()
{
#ifndef KERNEL
int size = accessTraceBufCount * sizeof(RF_AccTraceEntry_t);
if (write(rf_trace_fd, (char *) access_tracebuf, size) < size ) {
fprintf(stderr, "Unable to write traces to file. tracing disabled\n");
RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t));
rf_accessTraceBufSize = 0;
close(rf_trace_fd);
}
#endif /* !KERNEL */
accessTraceBufCount = 0;
}
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