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 void
  68 rxi_calltrace(unsigned int event, struct rx_call *call)
  69 {
  70     struct clock now;
  71     struct rx_trace rxtinfo;
  72
  73     if (!rxi_tracename[0])
  74         return;
  75
  76     if (rxi_logfd < 0) {
  77         rxi_logfd = open(rxi_tracename, O_WRONLY | O_CREAT | O_TRUNC, 0777);
  78         if (rxi_logfd < 0)
  79             rxi_tracename[0] = '\0';
  80     }
  81     clock_GetTime(&now);
  82
  83     rxtinfo.event = event;
  84     rxtinfo.now = now.sec * 1000 + now.usec / 1000;
  85     rxtinfo.cid = call->conn->cid;
  86     rxtinfo.call = *(call->callNumber);
  87     rxtinfo.qlen = rx_atomic_read(&rx_nWaiting);
  88     rxtinfo.servicetime = 0;
  89     rxtinfo.waittime = 0;
  90
  91     switch (event) {
  92     case RX_CALL_END:
  93         clock_Sub(&now, &(call->traceStart));
  94         rxtinfo.servicetime = now.sec * 10000 + now.usec / 100;
  95         if (call->traceWait.sec) {
  96             now = call->traceStart;
  97             clock_Sub(&now, &(call->traceWait));
  98             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
  99         } else
 100             rxtinfo.waittime = 0;
 101         call->traceWait.sec = call->traceWait.usec = call->traceStart.sec =
 102             call->traceStart.usec = 0;
 103         break;
 104
 105     case RX_CALL_START:
 106         call->traceStart = now;
 107         if (call->traceWait.sec) {
 108             clock_Sub(&now, &(call->traceWait));
 109             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
 110         } else
 111             rxtinfo.waittime = 0;
 112         break;
 113
 114     case RX_TRACE_DROP:
 115         if (call->traceWait.sec) {
 116             clock_Sub(&now, &(call->traceWait));
 117             rxtinfo.waittime = now.sec * 10000 + now.usec / 100;
 118         } else
 119             rxtinfo.waittime = 0;
 120         break;
 121
 122     case RX_CALL_ARRIVAL:
 123         call->traceWait = now;
 124     default:
 125         break;
 126     }
 127
 128     memcpy(rxi_tracebuf + rxi_tracepos, &rxtinfo, sizeof(struct rx_trace));
 129     rxi_tracepos += sizeof(struct rx_trace);
 130     if (rxi_tracepos >= (4096 - sizeof(struct rx_trace)))
 131         rxi_flushtrace();
 132 }
 133
 134 #ifdef DUMPTRACE
 135 #ifdef AFS_NT40_ENV
 136 #include <afs/afsutil.h>
 137 #endif
 138
 139 int
 140 main(int argc, char **argv)
 141 {
 142     struct rx_trace ip;
 143     int err = 0;
 144
 145     setlinebuf(stdout);
 146     argv++;
 147     argc--;
 148     while (argc && **argv == '-') {
 149         if (strcmp(*argv, "-trace") == 0) {
 150             strcpy(rxi_tracename, *(++argv));
 151             argc--;
 152         } else {
 153             err++;
 154             break;
 155         }
 156         argv++, argc--;
 157     }
 158     if (err || argc != 0) {
 159         printf("usage: dumptrace [-trace pathname]");
 160         exit(1);
 161     }
 162
 163     rxi_logfd = open(rxi_tracename, O_RDONLY);
 164     if (rxi_logfd < 0) {
 165         perror("");
 166         exit(errno);
 167     }
 168
 169     while (read(rxi_logfd, &ip, sizeof(struct rx_trace))) {
 170         printf("%9u ", ip.now);
 171         switch (ip.event) {
 172         case RX_CALL_END:
 173             putchar('E');
 174             break;
 175         case RX_CALL_START:
 176             putchar('S');
 177             break;
 178         case RX_CALL_ARRIVAL:
 179             putchar('A');
 180             break;
 181         case RX_TRACE_DROP:
 182             putchar('D');
 183             break;
 184         default:
 185             putchar('U');
 186             break;
 187         }
 188         printf(" %3u %7u %7u      %x.%x\n", ip.qlen, ip.servicetime,
 189                ip.waittime, ip.cid, ip.call);
 190     }
 191     return 0;
 192 }
 193
 194 #endif /* DUMPTRACE */
 195 #endif /* RXDEBUG */