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      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 (at) 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
     58 rf_ShutdownAccessTrace(void *unused)
     59 {
     60 	rf_destroy_mutex2(rf_tracing_mutex);
     61 }
     62 
     63 int
     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
     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