1 /* $NetBSD: rf_acctrace.c,v 1.4 1999/08/13 03:41:52 oster 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/stat.h> 37 #include <sys/types.h> 38 39 #include "rf_threadstuff.h" 40 #include "rf_types.h" 41 #include "rf_debugMem.h" 42 #include "rf_acctrace.h" 43 #include "rf_general.h" 44 #include "rf_raid.h" 45 #include "rf_etimer.h" 46 #include "rf_hist.h" 47 #include "rf_shutdown.h" 48 49 static long numTracesSoFar; 50 static int accessTraceBufCount = 0; 51 static RF_AccTraceEntry_t *access_tracebuf; 52 static long traceCount; 53 54 int rf_stopCollectingTraces; 55 RF_DECLARE_MUTEX(rf_tracing_mutex) 56 int rf_trace_fd; 57 58 static void rf_ShutdownAccessTrace(void *); 59 60 static void rf_ShutdownAccessTrace(ignored) 61 void *ignored; 62 { 63 if (rf_accessTraceBufSize) { 64 if (accessTraceBufCount) 65 rf_FlushAccessTraceBuf(); 66 RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t)); 67 } 68 rf_mutex_destroy(&rf_tracing_mutex); 69 } 70 71 int 72 rf_ConfigureAccessTrace(listp) 73 RF_ShutdownList_t **listp; 74 { 75 int rc; 76 77 numTracesSoFar = accessTraceBufCount = rf_stopCollectingTraces = 0; 78 if (rf_accessTraceBufSize) { 79 RF_Malloc(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t), (RF_AccTraceEntry_t *)); 80 accessTraceBufCount = 0; 81 } 82 traceCount = 0; 83 numTracesSoFar = 0; 84 rc = rf_mutex_init(&rf_tracing_mutex); 85 if (rc) { 86 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 87 __LINE__, rc); 88 } 89 rc = rf_ShutdownCreate(listp, rf_ShutdownAccessTrace, NULL); 90 if (rc) { 91 RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__, 92 __LINE__, rc); 93 if (rf_accessTraceBufSize) { 94 RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t)); 95 rf_mutex_destroy(&rf_tracing_mutex); 96 } 97 } 98 return (rc); 99 } 100 /* install a trace record. cause a flush to disk or to the trace collector daemon 101 * if the trace buffer is at least 1/2 full. 102 */ 103 void 104 rf_LogTraceRec(raid, rec) 105 RF_Raid_t *raid; 106 RF_AccTraceEntry_t *rec; 107 { 108 RF_AccTotals_t *acc = &raid->acc_totals; 109 #if 0 110 RF_Etimer_t timer; 111 int i, n; 112 #endif 113 114 if (rf_stopCollectingTraces || ((rf_maxNumTraces >= 0) && (numTracesSoFar >= rf_maxNumTraces))) 115 return; 116 117 /* update AccTotals for this device */ 118 if (!raid->keep_acc_totals) 119 return; 120 acc->num_log_ents++; 121 if (rec->reconacc) { 122 acc->recon_start_to_fetch_us += rec->specific.recon.recon_start_to_fetch_us; 123 acc->recon_fetch_to_return_us += rec->specific.recon.recon_fetch_to_return_us; 124 acc->recon_return_to_submit_us += rec->specific.recon.recon_return_to_submit_us; 125 acc->recon_num_phys_ios += rec->num_phys_ios; 126 acc->recon_phys_io_us += rec->phys_io_us; 127 acc->recon_diskwait_us += rec->diskwait_us; 128 acc->recon_reccount++; 129 } else { 130 RF_HIST_ADD(acc->tot_hist, rec->total_us); 131 RF_HIST_ADD(acc->dw_hist, rec->diskwait_us); 132 /* count of physical ios which are too big. often due to 133 * thermal recalibration */ 134 /* if bigvals > 0, you should probably ignore this data set */ 135 if (rec->diskwait_us > 100000) 136 acc->bigvals++; 137 acc->total_us += rec->total_us; 138 acc->suspend_ovhd_us += rec->specific.user.suspend_ovhd_us; 139 acc->map_us += rec->specific.user.map_us; 140 acc->lock_us += rec->specific.user.lock_us; 141 acc->dag_create_us += rec->specific.user.dag_create_us; 142 acc->dag_retry_us += rec->specific.user.dag_retry_us; 143 acc->exec_us += rec->specific.user.exec_us; 144 acc->cleanup_us += rec->specific.user.cleanup_us; 145 acc->exec_engine_us += rec->specific.user.exec_engine_us; 146 acc->xor_us += rec->xor_us; 147 acc->q_us += rec->q_us; 148 acc->plog_us += rec->plog_us; 149 acc->diskqueue_us += rec->diskqueue_us; 150 acc->diskwait_us += rec->diskwait_us; 151 acc->num_phys_ios += rec->num_phys_ios; 152 acc->phys_io_us = rec->phys_io_us; 153 acc->user_reccount++; 154 } 155 } 156 157 158 /* assumes the tracing mutex is locked at entry. In order to allow this to be called 159 * from interrupt context, we don't do any copyouts here, but rather just wake trace 160 * buffer collector thread. 161 */ 162 void 163 rf_FlushAccessTraceBuf() 164 { 165 accessTraceBufCount = 0; 166 } 167