1 /* $NetBSD: rf_acctrace.c,v 1.24 2011/05/01 06:22:54 mrg Exp $ */
2 /*
3 * Copyright (c) 1995 Carnegie-Mellon University.
4 * All rights reserved.
5 *
6 * Author: Mark Holland
7 *
8 * Permission to use, copy, modify and distribute this software and
9 * its documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
27 */
28
29 /*****************************************************************************
30 *
31 * acctrace.c -- code to support collecting information about each access
32 *
33 *****************************************************************************/
34
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: rf_acctrace.c,v 1.24 2011/05/01 06:22:54 mrg Exp $");
38
39 #include <sys/stat.h>
40 #include <sys/types.h>
41 #include <dev/raidframe/raidframevar.h>
42
43 #include "rf_threadstuff.h"
44 #include "rf_debugMem.h"
45 #include "rf_acctrace.h"
46 #include "rf_general.h"
47 #include "rf_raid.h"
48 #include "rf_etimer.h"
49 #include "rf_hist.h"
50 #include "rf_shutdown.h"
51
52 #if RF_ACC_TRACE > 0
53 static long numTracesSoFar;
54
55 rf_declare_mutex2(rf_tracing_mutex);
56
57 static void
rf_ShutdownAccessTrace(void * unused)58 rf_ShutdownAccessTrace(void *unused)
59 {
60 rf_destroy_mutex2(rf_tracing_mutex);
61 }
62
63 int
rf_ConfigureAccessTrace(RF_ShutdownList_t ** listp)64 rf_ConfigureAccessTrace(RF_ShutdownList_t **listp)
65 {
66 numTracesSoFar = 0;
67 rf_init_mutex2(rf_tracing_mutex, IPL_VM);
68 rf_ShutdownCreate(listp, rf_ShutdownAccessTrace, NULL);
69 return (0);
70 }
71
72 /* install a trace record. cause a flush to disk or to the trace
73 * collector daemon if the trace buffer is at least 1/2 full.
74 */
75 void
rf_LogTraceRec(RF_Raid_t * raid,RF_AccTraceEntry_t * rec)76 rf_LogTraceRec(RF_Raid_t *raid, RF_AccTraceEntry_t *rec)
77 {
78 RF_AccTotals_t *acc = &raid->acc_totals;
79
80 if (((rf_maxNumTraces >= 0) && (numTracesSoFar >= rf_maxNumTraces)))
81 return;
82
83 /* update AccTotals for this device */
84 if (!raid->keep_acc_totals)
85 return;
86 acc->num_log_ents++;
87 if (rec->reconacc) {
88 acc->recon_start_to_fetch_us += rec->specific.recon.recon_start_to_fetch_us;
89 acc->recon_fetch_to_return_us += rec->specific.recon.recon_fetch_to_return_us;
90 acc->recon_return_to_submit_us += rec->specific.recon.recon_return_to_submit_us;
91 acc->recon_num_phys_ios += rec->num_phys_ios;
92 acc->recon_phys_io_us += rec->phys_io_us;
93 acc->recon_diskwait_us += rec->diskwait_us;
94 acc->recon_reccount++;
95 } else {
96 RF_HIST_ADD(acc->tot_hist, rec->total_us);
97 RF_HIST_ADD(acc->dw_hist, rec->diskwait_us);
98 /* count of physical ios which are too big. often due to
99 * thermal recalibration */
100 /* if bigvals > 0, you should probably ignore this data set */
101 if (rec->diskwait_us > 100000)
102 acc->bigvals++;
103 acc->total_us += rec->total_us;
104 acc->suspend_ovhd_us += rec->specific.user.suspend_ovhd_us;
105 acc->map_us += rec->specific.user.map_us;
106 acc->lock_us += rec->specific.user.lock_us;
107 acc->dag_create_us += rec->specific.user.dag_create_us;
108 acc->dag_retry_us += rec->specific.user.dag_retry_us;
109 acc->exec_us += rec->specific.user.exec_us;
110 acc->cleanup_us += rec->specific.user.cleanup_us;
111 acc->exec_engine_us += rec->specific.user.exec_engine_us;
112 acc->xor_us += rec->xor_us;
113 acc->q_us += rec->q_us;
114 acc->plog_us += rec->plog_us;
115 acc->diskqueue_us += rec->diskqueue_us;
116 acc->diskwait_us += rec->diskwait_us;
117 acc->num_phys_ios += rec->num_phys_ios;
118 acc->phys_io_us = rec->phys_io_us;
119 acc->user_reccount++;
120 }
121 }
122 #endif /* RF_ACC_TRACE > 0 */
123
124