| /* rtstat.c: A program for route cache monitoring |
| * |
| * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se> |
| * Uppsala University, Sweden |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * Additional credits: |
| * Martin Josefsson <gandalf@wlug.westbo.se> 010828 bug fix |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <getopt.h> |
| |
| #define VERSION "0.33 010829" |
| |
| extern char *optarg; |
| extern int optind, opterr, optopt; |
| |
| FILE *fp; |
| unsigned rt_size, in_hit[2], in_slow_tot[2], in_slow_mc[2], |
| in_no_rt[2], in_brd[2], in_martian_dst[2], in_martian_src[2], |
| out_hit[2], out_slow_tot[2], out_slow_mc[2]; |
| |
| |
| /* Read (and summarize for SMP) the different stats vars. */ |
| |
| void scan_line(int i) |
| { |
| unsigned temp[10]; |
| |
| in_hit[i] = 0; |
| in_slow_tot[i] = 0; |
| in_slow_mc[i] = 0; |
| in_no_rt[i] = 0; |
| in_brd[i] = 0; |
| in_martian_dst[i] = 0; |
| in_martian_src[i] = 0; |
| out_hit[i] = 0; |
| out_slow_tot[i] = 0; |
| out_slow_mc[i] = 0; |
| |
| while(!feof(fp)) { |
| fscanf(fp, "%x %x %x %x %x %x %x %x %x %x %x\n", |
| &rt_size, |
| &temp[0], /* in_hit */ |
| &temp[1], /* in_slow_tot */ |
| &temp[2], /* in_slow_mc */ |
| &temp[3], /* in_no_rt */ |
| &temp[4], /* in_brd */ |
| &temp[5], /* in_martian_dst */ |
| &temp[6], /* in_martian_src */ |
| &temp[7], /* out_hit */ |
| &temp[8], /* out_slow_tot */ |
| &temp[9] /* out_slow_mc */ |
| ); |
| |
| in_hit[i] += temp[0]; |
| in_slow_tot[i] += temp[1]; |
| in_slow_mc[i] += temp[2]; |
| in_no_rt[i] += temp[3]; |
| in_brd[i] += temp[4]; |
| in_martian_dst[i] += temp[5]; |
| in_martian_src[i] += temp[6]; |
| out_hit[i] += temp[7]; |
| out_slow_tot[i] += temp[8]; |
| out_slow_mc[i] += temp[9]; |
| } |
| return; |
| } |
| |
| void print_hdr_line(void) |
| { |
| printf(" size IN: hit tot mc no_rt bcast madst masrc OUT: hit tot mc\n"); |
| } |
| |
| int usage(int exit_code) |
| { |
| fprintf(stderr, "rtstat Version %s\n", VERSION); |
| fprintf(stderr, " -help\n"); |
| fprintf(stderr, " -i interval\n"); |
| fprintf(stderr, " -s subject [0-2]\n"); |
| fprintf(stderr, "\n"); |
| print_hdr_line(); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, "size == route cache size\n"); |
| fprintf(stderr, "hit == IN: total number of cache hits per sec\n"); |
| fprintf(stderr, "tot == IN: total number of cache misses per sec\n"); |
| fprintf(stderr, "mc == IN: mulicast cache misses per sec\n"); |
| fprintf(stderr, "no_rt == IN: route table misses per sec\n"); |
| fprintf(stderr, "bcast == IN: broadcast cache misses per sec\n"); |
| fprintf(stderr, "madst == IN: dst martians per sec\n"); |
| fprintf(stderr, "masrc == IN: src martians per sec\n"); |
| |
| fprintf(stderr, "hit == OUT: total number of cache hits per sec\n"); |
| fprintf(stderr, "tot == OUT: total number of cache misses per sec\n"); |
| fprintf(stderr, "mc == OUT: mulicast cache misses per sec\n"); |
| |
| exit(exit_code); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int c, i=1, interval=2, hdr=2; |
| |
| while ((c=getopt(argc, argv,"h?s:i:")) != EOF) |
| switch (c) |
| { |
| |
| case '?': |
| case 'h': usage(0); |
| |
| case 'i': sscanf(optarg, "%u", &interval); |
| break; |
| |
| case 's': sscanf(optarg, "%u", &hdr); |
| break; |
| |
| default: usage(1); |
| } |
| |
| if(interval < 1 ) interval=1; |
| |
| if ((fp = fopen("/proc/net/rt_cache_stat", "r"))); |
| else |
| { |
| perror("fopen"); |
| exit(-1); |
| } |
| |
| if(hdr > 0) print_hdr_line(); |
| |
| for(;1;i++) { |
| |
| if(hdr > 1 && (! (i % 20))) print_hdr_line(); |
| |
| scan_line(0); |
| sleep(interval); |
| rewind(fp); |
| scan_line(1); |
| rewind(fp); |
| |
| printf("%5u %9u %7u %5u %5u %5u %5u %5u %9u %7u %6u\n", |
| rt_size, |
| (in_hit[1] - in_hit[0])/interval, |
| (in_slow_tot[1] - in_slow_tot[0])/interval, |
| (in_slow_mc[1] - in_slow_mc[0])/interval, |
| (in_no_rt[1] - in_no_rt[0])/interval, |
| (in_brd[1] - in_brd[0])/interval, |
| (in_martian_dst[1] - in_martian_dst[0])/interval, |
| (in_martian_src[1] - in_martian_src[0])/interval, |
| |
| (out_hit[1] - out_hit[0])/interval, |
| (out_slow_tot[1] - out_slow_tot[0])/interval, |
| (out_slow_mc[1] - out_slow_mc[0])/interval |
| ); |
| } |
| return 1; |
| } |
| |
| /* |
| * Compile: |
| gcc -g -O2 -Wall -o rtstat rtstat.c |
| */ |
| |
| |
| |