src/rx/rx_trace.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #include <afsconfig.h>
  11 #include <afs/param.h>
  12
  13 #include <roken.h>
  14
  15 #ifndef RXDEBUG
  16 char rxi_tracename[80] = "\0Tracing not compiled in";
  17 #ifdef DUMPTRACE
  18 int
  19 main(int argc, char **argv)
  20 {
  21     return 0;
  22 }
  23 #endif
  24 #else
  25
  26 #include "rx.h"
  27 #include "rx_atomic.h"
  28 #include "rx_globals.h"
  29 #include "rx_internal.h"
  30 #include "rx_trace.h"
  31
  32 #include "rx_conn.h"
  33 #include "rx_call.h"
  34
  35 #ifdef RXTRACEON
  36 char rxi_tracename[80] = "/tmp/rxcalltrace";
  37 #else
  38 char rxi_tracename[80] =
  39     "\0Change This pathname (and preceding NUL) to initiate tracing";
  40 #endif
  41 int rxi_logfd = -1;
  42 char rxi_tracebuf[4096];
  43 afs_uint32 rxi_tracepos = 0;
  44
  45 struct rx_trace {
  46     afs_uint32 cid;
  47     unsigned short call;
  48     unsigned short qlen;
  49     afs_uint32 now;
  50     afs_uint32 waittime;
  51     afs_uint32 servicetime;
  52     afs_uint32 event;
  53 };
  54
  55 void
  56 rxi_flushtrace(void)
  57 {
  58     afs_uint32 len = rxi_tracepos;
  59
  60     rxi_tracepos = 0;
  61     if (rxi_logfd < 0)
  62         return;
  63     if (write(rxi_logfd, rxi_tracebuf, len) < 0) {
  64         /* don't care */
  65     }
  66 }
  67
  68 void
  69 rxi_calltrace(unsigned int event, struct rx_call *call)
  70 {
  71     struct clock now;
  72     struct rx_trace rxtinfo;
  73
  74     if (!rxi_tracename[0])
  75         return;
  76
  77     if (rxi_logfd < 0) {
  78         rxi_logfd = open(rxi_tracename, O_WRONLY | O_CREAT | O_TRUNC, 0777);
  79         if (rxi_logfd < 0)
  80             rxi_tracename[0] = '\0';
  81     }
  82     clock_GetTime(&now);
  83
  84     rxtinfo.event = event;
  85     rxtinfo.now = now.sec * 1000 + now.usec / 1000;
  86     rxtinfo.cid = call->conn->cid;
  87     rxtinfo.call = *(call->callNumber);
  88     rxtinfo.qlen = rx_atomic_read(&rx_nWaiting);
  89     rxtinfo.servicetime = 0;
  90     rxtinfo.waittime = 0;
  91
  92     switch (event) {
  93     case RX_CALL_END:
  94         clock_Sub(&now, &(call->traceStart));
  95         rxtinfo.servicetime = now.sec * 10000 + now.usec / 100;
  96         if (call->traceWait.sec) {
  97             now = call->traceStart;
  98             clock_Sub(&now, &(call->traceWait));
  99             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
 100         } else
 101             rxtinfo.waittime = 0;
 102         call->traceWait.sec = call->traceWait.usec = call->traceStart.sec =
 103             call->traceStart.usec = 0;
 104         break;
 105
 106     case RX_CALL_START:
 107         call->traceStart = now;
 108         if (call->traceWait.sec) {
 109             clock_Sub(&now, &(call->traceWait));
 110             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
 111         } else
 112             rxtinfo.waittime = 0;
 113         break;
 114
 115     case RX_TRACE_DROP:
 116         if (call->traceWait.sec) {
 117             clock_Sub(&now, &(call->traceWait));
 118             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
 119         } else
 120             rxtinfo.waittime = 0;
 121         break;
 122
 123     case RX_CALL_ARRIVAL:
 124         call->traceWait = now;
 125     default:
 126         break;
 127     }
 128
 129     memcpy(rxi_tracebuf + rxi_tracepos, &rxtinfo, sizeof(struct rx_trace));
 130     rxi_tracepos += sizeof(struct rx_trace);
 131     if (rxi_tracepos >= (4096 - sizeof(struct rx_trace)))
 132         rxi_flushtrace();
 133 }
 134
 135 #ifdef DUMPTRACE
 136 #ifdef AFS_NT40_ENV
 137 #include <afs/afsutil.h>
 138 #endif
 139
 140 int
 141 main(int argc, char **argv)
 142 {
 143     struct rx_trace ip;
 144     int err = 0;
 145
 146     setlinebuf(stdout);
 147     argv++;
 148     argc--;
 149     while (argc && **argv == '-') {
 150         if (strcmp(*argv, "-trace") == 0) {
 151             strcpy(rxi_tracename, *(++argv));
 152             argc--;
 153         } else {
 154             err++;
 155             break;
 156         }
 157         argv++, argc--;
 158     }
 159     if (err || argc != 0) {
 160         printf("usage: dumptrace [-trace pathname]");
 161         exit(1);
 162     }
 163
 164     rxi_logfd = open(rxi_tracename, O_RDONLY);
 165     if (rxi_logfd < 0) {
 166         perror("");
 167         exit(errno);
 168     }
 169
 170     while (read(rxi_logfd, &ip, sizeof(struct rx_trace))) {
 171         printf("%9u ", ip.now);
 172         switch (ip.event) {
 173         case RX_CALL_END:
 174             putchar('E');
 175             break;
 176         case RX_CALL_START:
 177             putchar('S');
 178             break;
 179         case RX_CALL_ARRIVAL:
 180             putchar('A');
 181             break;
 182         case RX_TRACE_DROP:
 183             putchar('D');
 184             break;
 185         default:
 186             putchar('U');
 187             break;
 188         }
 189         printf(" %3u %7u %7u      %x.%x\n", ip.qlen, ip.servicetime,
 190                ip.waittime, ip.cid, ip.call);
 191     }
 192     return 0;
 193 }
 194
 195 #endif /* DUMPTRACE */
 196 #endif /* RXDEBUG */