245 lines
6.4 KiB
C
245 lines
6.4 KiB
C
/* rtstat.c: A program for route cache monitoring
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*
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* Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
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* Uppsala University, Sweden
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Additional credits:
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* Martin Josefsson <gandalf@wlug.westbo.se> 010828 bug fix
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* 030420 cleanup
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*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <getopt.h>
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#define VERSION "0.42 030623"
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#define FMT_LEN1 11
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#define FMT_LEN2 15
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#define FMT_LEN3 17
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extern char *optarg;
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extern int optind, opterr, optopt;
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FILE *fp;
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unsigned rt_size, in_hit[2], in_slow_tot[2], in_slow_mc[2],
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in_no_rt[2], in_brd[2], in_martian_dst[2], in_martian_src[2],
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out_hit[2], out_slow_tot[2], out_slow_mc[2], gc_total[2],
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gc_ignored[2], gc_goal_miss[2], gc_dst_overflow[2],
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in_hlist_search[2], out_hlist_search[2];
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int llen;
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/* Read (and summarize for SMP) the different stats vars. */
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void scan_line(int i)
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{
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char buf[1024];
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unsigned temp[16];
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i %= 2;
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in_hit[i] = 0;
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in_slow_tot[i] = 0;
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in_slow_mc[i] = 0;
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in_no_rt[i] = 0;
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in_brd[i] = 0;
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in_martian_dst[i] = 0;
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in_martian_src[i] = 0;
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out_hit[i] = 0;
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out_slow_tot[i] = 0;
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out_slow_mc[i] = 0;
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gc_total[i] = 0;
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gc_ignored[i] = 0;
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gc_goal_miss[i] = 0;
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gc_dst_overflow[i] = 0;
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in_hlist_search[i] = 0;
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out_hlist_search[i] = 0;
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for(;;) {
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fgets(buf, 1023, fp);
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if( feof(fp) ) break;
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llen = sscanf(buf, "%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x\n",
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&rt_size,
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&temp[0], /* in_hit */
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&temp[1], /* in_slow_tot */
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&temp[2], /* in_slow_mc */
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&temp[3], /* in_no_rt */
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&temp[4], /* in_brd */
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&temp[5], /* in_martian_dst */
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&temp[6], /* in_martian_src */
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&temp[7], /* out_hit */
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&temp[8], /* out_slow_tot */
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&temp[9], /* out_slow_mc */
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&temp[10], /* gc_total */
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&temp[11], /* gc_ignored */
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&temp[12], /* gc_goal_miss */
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&temp[13], /* gc_dst_overflow */
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&temp[14], /* in_hlist_search */
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&temp[15] /* out_hlist_search */
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);
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in_hit[i] += temp[0];
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in_slow_tot[i] += temp[1];
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in_slow_mc[i] += temp[2];
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in_no_rt[i] += temp[3];
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in_brd[i] += temp[4];
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in_martian_dst[i] += temp[5];
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in_martian_src[i] += temp[6];
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out_hit[i] += temp[7];
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out_slow_tot[i] += temp[8];
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out_slow_mc[i] += temp[9];
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if(llen > FMT_LEN1 ) {
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gc_total[i] += temp[10];
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gc_ignored[i] += temp[11];
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gc_goal_miss[i] += temp[12];
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gc_dst_overflow[i] += temp[13];
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}
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if(llen > FMT_LEN2 ) {
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in_hlist_search[i] += temp[14];
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out_hlist_search[i] += temp[15];
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}
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}
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}
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void print_hdr_line(void)
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{
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printf(" size IN: hit tot mc no_rt bcast madst masrc OUT: hit tot mc");
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if( llen > FMT_LEN1 )
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printf(" GC: tot ignored goal_miss ovrf");
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if( llen > FMT_LEN2 )
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printf(" HASH: in_search out_search");
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printf("\n");
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}
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int usage(int exit_code)
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{
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fprintf(stderr, "rtstat Version %s\n", VERSION);
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fprintf(stderr, " -help\n");
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fprintf(stderr, " -i interval\n");
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fprintf(stderr, " -s subject [0-2]\n");
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fprintf(stderr, "\n");
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print_hdr_line();
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fprintf(stderr, "\n");
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fprintf(stderr, "size == route cache size\n");
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fprintf(stderr, "hit == IN: total number of cache hits per sec\n");
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fprintf(stderr, "tot == IN: total number of cache misses per sec\n");
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fprintf(stderr, "mc == IN: mulicast cache misses per sec\n");
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fprintf(stderr, "no_rt == IN: route table misses per sec\n");
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fprintf(stderr, "bcast == IN: broadcast cache misses per sec\n");
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fprintf(stderr, "madst == IN: dst martians per sec\n");
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fprintf(stderr, "masrc == IN: src martians per sec\n");
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fprintf(stderr, "hit == OUT: total number of cache hits per sec\n");
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fprintf(stderr, "tot == OUT: total number of cache misses per sec\n");
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fprintf(stderr, "mc == OUT: mulicast cache misses per sec\n");
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fprintf(stderr, "tot == GC: total calls per sec\n");
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fprintf(stderr, "ignored == GC: calls ignored per sec\n");
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fprintf(stderr, "goal_miss == GC: goal miss per sec\n");
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fprintf(stderr, "ovrflw == GC: dst_overflow per sec\n");
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fprintf(stderr, "in_search == HASH: input hash list search per sec\n");
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fprintf(stderr, "out_search == HASH: output hash list search per sec\n");
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exit(exit_code);
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}
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void print(int i, int interval)
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{
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int new = i % 2;
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int old = !new;
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printf("%5u %9u %7u %5u %5u %5u %5u %5u %9u %7u %6u",
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rt_size,
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(in_hit[new] - in_hit[old])/interval,
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(in_slow_tot[new] - in_slow_tot[old])/interval,
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(in_slow_mc[new] - in_slow_mc[old])/interval,
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(in_no_rt[new] - in_no_rt[old])/interval,
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(in_brd[new] - in_brd[old])/interval,
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(in_martian_dst[new] - in_martian_dst[old])/interval,
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(in_martian_src[new] - in_martian_src[old])/interval,
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(out_hit[new] - out_hit[old])/interval,
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(out_slow_tot[new] - out_slow_tot[old])/interval,
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(out_slow_mc[new] - out_slow_mc[old])/interval);
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if(llen > FMT_LEN1 )
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printf(" %7u %7u %9u %4u",
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(gc_total[new] - gc_total[old])/interval,
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(gc_ignored[new] - gc_ignored[old])/interval,
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(gc_goal_miss[new] - gc_goal_miss[old])/interval,
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(gc_dst_overflow[new] - gc_dst_overflow[old])/interval);
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if(llen > FMT_LEN2 )
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printf(" %15u %10u",
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(in_hlist_search[new] - in_hlist_search[old])/interval,
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(out_hlist_search[new] - out_hlist_search[old])/interval);
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printf("\n");
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}
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int main(int argc, char **argv)
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{
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int c, i, interval = 2, hdr = 2;
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while ((c=getopt(argc, argv,"h?s:i:")) != EOF) {
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switch (c)
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{
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case '?':
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case 'h':
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usage(0);
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break;
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case 'i':
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sscanf(optarg, "%u", &interval);
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break;
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case 's':
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sscanf(optarg, "%u", &hdr);
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break;
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default:
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usage(1);
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}
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}
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if (interval < 1)
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interval = 1;
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fp = fopen("/proc/net/rt_cache_stat", "r");
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if (!fp) {
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perror("fopen");
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exit(-1);
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}
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/* Read llen */
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scan_line(0);
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rewind(fp);
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if (hdr > 0)
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print_hdr_line();
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for(i = 0;;i++) {
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if(hdr > 1 && i != 0 && (i % 20) == 0)
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print_hdr_line();
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scan_line(i);
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rewind(fp);
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if (i != 0)
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print(i, interval);
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sleep(interval);
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}
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return 1;
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}
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