Annotation of sys/dev/raidframe/rf_acctrace.c, Revision 1.1.1.1
1.1 nbrk 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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