1 /* $NetBSD: rf_acctrace.c,v 1.7 2001/11/13 07:11:12 lukem 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 1.7 2001/11/13 07:11:12 lukem 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 static long numTracesSoFar; 53 static int accessTraceBufCount = 0; 54 static RF_AccTraceEntry_t *access_tracebuf; 55 static long traceCount; 56 57 int rf_stopCollectingTraces; 58 RF_DECLARE_MUTEX(rf_tracing_mutex) 59 int rf_trace_fd; 60 61 static void rf_ShutdownAccessTrace(void *); 62 63 static void rf_ShutdownAccessTrace(ignored) 64 void *ignored; 65 { 66 if (rf_accessTraceBufSize) { 67 if (accessTraceBufCount) 68 rf_FlushAccessTraceBuf(); 69 RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t)); 70 } 71 rf_mutex_destroy(&rf_tracing_mutex); 72 } 73 74 int 75 rf_ConfigureAccessTrace(listp) 76 RF_ShutdownList_t **listp; 77 { 78 int rc; 79 80 numTracesSoFar = accessTraceBufCount = rf_stopCollectingTraces = 0; 81 if (rf_accessTraceBufSize) { 82 RF_Malloc(access_tracebuf, rf_accessTraceBufSize * 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", __FILE__, 90 __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 rc=%d\n", __FILE__, 95 __LINE__, rc); 96 if (rf_accessTraceBufSize) { 97 RF_Free(access_tracebuf, rf_accessTraceBufSize * sizeof(RF_AccTraceEntry_t)); 98 rf_mutex_destroy(&rf_tracing_mutex); 99 } 100 } 101 return (rc); 102 } 103 /* install a trace record. cause a flush to disk or to the trace collector daemon 104 * if the trace buffer is at least 1/2 full. 105 */ 106 void 107 rf_LogTraceRec(raid, rec) 108 RF_Raid_t *raid; 109 RF_AccTraceEntry_t *rec; 110 { 111 RF_AccTotals_t *acc = &raid->acc_totals; 112 113 if (rf_stopCollectingTraces || ((rf_maxNumTraces >= 0) && (numTracesSoFar >= rf_maxNumTraces))) 114 return; 115 116 /* update AccTotals for this device */ 117 if (!raid->keep_acc_totals) 118 return; 119 acc->num_log_ents++; 120 if (rec->reconacc) { 121 acc->recon_start_to_fetch_us += rec->specific.recon.recon_start_to_fetch_us; 122 acc->recon_fetch_to_return_us += rec->specific.recon.recon_fetch_to_return_us; 123 acc->recon_return_to_submit_us += rec->specific.recon.recon_return_to_submit_us; 124 acc->recon_num_phys_ios += rec->num_phys_ios; 125 acc->recon_phys_io_us += rec->phys_io_us; 126 acc->recon_diskwait_us += rec->diskwait_us; 127 acc->recon_reccount++; 128 } else { 129 RF_HIST_ADD(acc->tot_hist, rec->total_us); 130 RF_HIST_ADD(acc->dw_hist, rec->diskwait_us); 131 /* count of physical ios which are too big. often due to 132 * thermal recalibration */ 133 /* if bigvals > 0, you should probably ignore this data set */ 134 if (rec->diskwait_us > 100000) 135 acc->bigvals++; 136 acc->total_us += rec->total_us; 137 acc->suspend_ovhd_us += rec->specific.user.suspend_ovhd_us; 138 acc->map_us += rec->specific.user.map_us; 139 acc->lock_us += rec->specific.user.lock_us; 140 acc->dag_create_us += rec->specific.user.dag_create_us; 141 acc->dag_retry_us += rec->specific.user.dag_retry_us; 142 acc->exec_us += rec->specific.user.exec_us; 143 acc->cleanup_us += rec->specific.user.cleanup_us; 144 acc->exec_engine_us += rec->specific.user.exec_engine_us; 145 acc->xor_us += rec->xor_us; 146 acc->q_us += rec->q_us; 147 acc->plog_us += rec->plog_us; 148 acc->diskqueue_us += rec->diskqueue_us; 149 acc->diskwait_us += rec->diskwait_us; 150 acc->num_phys_ios += rec->num_phys_ios; 151 acc->phys_io_us = rec->phys_io_us; 152 acc->user_reccount++; 153 } 154 } 155 156 157 /* assumes the tracing mutex is locked at entry. In order to allow this to be called 158 * from interrupt context, we don't do any copyouts here, but rather just wake trace 159 * buffer collector thread. 160 */ 161 void 162 rf_FlushAccessTraceBuf() 163 { 164 accessTraceBufCount = 0; 165 } 166