Added tiny tool to measure CAN busload.
Oliver Hartkopp
parent
0df736ca51
commit
789a021bb9
3
Makefile
3
Makefile
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@ -46,7 +46,7 @@ CFLAGS = -O2 -Wall -Wno-parentheses -I../kernel/2.6/include \
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-DAF_CAN=PF_CAN
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PROGRAMS = candump cansniffer cansend canplayer canlogserver cangen\
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log2long log2asc asc2log slcan_attach vcan
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canbusload log2long log2asc asc2log slcan_attach vcan
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all: $(PROGRAMS)
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@ -64,6 +64,7 @@ cangen.o: lib.h
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candump.o: lib.h
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canplayer.o: lib.h
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canlogserver.o: lib.h
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canbusload.o: lib.h
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log2long.o: lib.h
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log2asc.o: lib.h
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asc2log.o: lib.h
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@ -0,0 +1,380 @@
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/*
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* $Id$
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*/
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/*
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* canbusload.c
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*
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* Copyright (c) 2002-2008 Volkswagen Group Electronic Research
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Volkswagen nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* Send feedback to <socketcan-users@lists.berlios.de>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include <ctype.h>
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#include <libgen.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <net/if.h>
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#include <linux/can.h>
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#include <linux/can/raw.h>
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#include "terminal.h"
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#define MAXSOCK 16 /* max. number of CAN interfaces given on the cmdline */
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#define PERCENTRES 5 /* resolution in percent for bargraph */
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#define NUMBAR (100/PERCENTRES) /* number of bargraph elements */
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extern int optind, opterr, optopt;
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static struct {
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char devname[IFNAMSIZ+1];
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unsigned int bitrate;
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unsigned int recv_frames;
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unsigned int recv_bits_total;
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unsigned int recv_bits_payload;
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} stat[MAXSOCK+1];
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static int max_devname_len; /* to prevent frazzled device name output */
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static int max_bitrate_len;
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static int currmax;
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static unsigned char redraw;
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static unsigned char timestamp;
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static unsigned char color;
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static unsigned char bargraph;
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static char *prg;
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void print_usage(char *prg)
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{
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fprintf(stderr, "\nUsage: %s [options] <CAN interface>+\n", prg);
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fprintf(stderr, " (use CTRL-C to terminate %s)\n\n", prg);
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fprintf(stderr, "Options: -t (show current time on the first line)\n");
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fprintf(stderr, " -c (colorize lines)\n");
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fprintf(stderr, " -b (show bargraph in %d%% resolution)\n", PERCENTRES);
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fprintf(stderr, " -r (redraw the terminal - similar to top)\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Up to %d CAN interfaces with mandatory bitrate can be specified on the \n", MAXSOCK);
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fprintf(stderr, "commandline in the form: <ifname>@<bitrate>\n\n");
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fprintf(stderr, "The bitrate is mandatory as it is needed to know the CAN bus bitrate to\n");
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fprintf(stderr, "calcultate the bus load percentage based on the received CAN frames.\n");
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fprintf(stderr, "For each given interface the data is presented in one line which contains:\n\n");
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fprintf(stderr, "(interface) (received CAN frames) (used bits total) (used bits for payload)\n");
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fprintf(stderr, "\nExample:\n");
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fprintf(stderr, "\nuser$> canbusload can0@100000 can1@500000 can2@500000 can3@500000 -r -t -b -c\n\n");
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fprintf(stderr, "%s 2008-05-27 15:18:49\n", prg);
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fprintf(stderr, " can0@100000 805 74491 36656 74%% |XXXXXXXXXXXXXX......|\n");
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fprintf(stderr, " can1@500000 796 75140 37728 15%% |XXX.................|\n");
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fprintf(stderr, " can2@500000 0 0 0 0%% |....................|\n");
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fprintf(stderr, " can3@500000 47 4633 2424 0%% |....................|\n");
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fprintf(stderr, "\n");
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}
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void sigterm(int signo)
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{
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exit(0);
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}
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void printstats(int signo)
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{
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int i, j, percent;
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if (redraw)
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printf("%s", CSR_HOME);
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if (timestamp) {
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time_t currtime;
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struct tm now;
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if (time(&currtime) == (time_t)-1) {
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perror("time");
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exit(1);
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}
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localtime_r(&currtime, &now);
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printf("%s %04d-%02d-%02d %02d:%02d:%02d\n",
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prg,
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now.tm_year + 1900,
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now.tm_mon + 1,
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now.tm_mday,
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now.tm_hour,
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now.tm_min,
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now.tm_sec);
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}
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for (i=0; i<currmax; i++) {
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if (color)
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if (i%2)
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printf("%s", FGRED);
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else
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printf("%s", FGBLUE);
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if (stat[i].bitrate)
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percent = (stat[i].recv_bits_total*100)/stat[i].bitrate;
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else
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percent = 0;
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printf(" %*s@%-*d %4d %6d %6d %3d%%",
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max_devname_len, stat[i].devname,
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max_bitrate_len, stat[i].bitrate,
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stat[i].recv_frames,
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stat[i].recv_bits_total,
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stat[i].recv_bits_payload,
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percent);
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if (bargraph) {
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printf(" |");
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for (j=0; j < NUMBAR; j++){
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if (j < percent/PERCENTRES)
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printf("X");
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else
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printf(".");
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}
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printf("|");
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}
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if (color)
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printf("%s", ATTRESET);
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printf("\n");
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stat[i].recv_frames = 0;
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stat[i].recv_bits_total = 0;
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stat[i].recv_bits_payload = 0;
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}
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printf("\n");
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alarm(1);
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}
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int main(int argc, char **argv)
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{
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fd_set rdfs;
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int s[MAXSOCK];
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int opt;
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char *ptr, *nptr;
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struct sockaddr_can addr;
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struct can_frame frame;
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int nbytes, i;
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struct ifreq ifr;
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sigset_t sigmask, savesigmask;
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signal(SIGTERM, sigterm);
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signal(SIGHUP, sigterm);
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signal(SIGINT, sigterm);
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signal(SIGALRM, printstats);
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prg = basename(argv[0]);
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while ((opt = getopt(argc, argv, "rtbch?")) != -1) {
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switch (opt) {
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case 'r':
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redraw = 1;
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break;
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case 't':
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timestamp = 1;
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break;
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case 'b':
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bargraph = 1;
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break;
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case 'c':
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color = 1;
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break;
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default:
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print_usage(prg);
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exit(1);
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break;
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}
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}
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if (optind == argc) {
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print_usage(prg);
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exit(0);
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}
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currmax = argc - optind; /* find real number of CAN devices */
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if (currmax > MAXSOCK) {
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printf("More than %d CAN devices given on commandline!\n", MAXSOCK);
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return 1;
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}
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for (i=0; i < currmax; i++) {
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ptr = argv[optind+i];
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nbytes = strlen(ptr);
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if (nbytes >= IFNAMSIZ+sizeof("@1000000")+1) {
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printf("name of CAN device '%s' is too long!\n", ptr);
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return 1;
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}
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#ifdef DEBUG
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printf("open %d '%s'.\n", i, ptr);
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#endif
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s[i] = socket(PF_CAN, SOCK_RAW, CAN_RAW);
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if (s[i] < 0) {
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perror("socket");
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return 1;
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}
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nptr = strchr(ptr, '@');
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if (!nptr) {
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print_usage(prg);
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return 1;
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}
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nbytes = nptr - ptr; /* interface name is up the first '@' */
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if (nbytes >= IFNAMSIZ) {
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printf("name of CAN device '%s' is too long!\n", ptr);
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return 1;
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}
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strncpy(stat[i].devname, ptr, nbytes);
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memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name));
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strncpy(ifr.ifr_name, ptr, nbytes);
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if (nbytes > max_devname_len)
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max_devname_len = nbytes; /* for nice printing */
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stat[i].bitrate = atoi(nptr+1); /* bitrate is placed behind the '@' */
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if (!stat[i].bitrate || stat[i].bitrate > 1000000) {
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printf("invalid bitrate for CAN device '%s'!\n", ptr);
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return 1;
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}
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nbytes = strlen(nptr+1);
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if (nbytes > max_bitrate_len)
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max_bitrate_len = nbytes; /* for nice printing */
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#ifdef DEBUG
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printf("using interface name '%s'.\n", ifr.ifr_name);
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#endif
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if (ioctl(s[i], SIOCGIFINDEX, &ifr) < 0) {
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perror("SIOCGIFINDEX");
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exit(1);
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}
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addr.can_family = AF_CAN;
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addr.can_ifindex = ifr.ifr_ifindex;
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if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
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perror("bind");
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return 1;
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}
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}
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alarm(1);
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if (redraw)
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printf("%s", CLR_SCREEN);
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while (1) {
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FD_ZERO(&rdfs);
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for (i=0; i<currmax; i++)
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FD_SET(s[i], &rdfs);
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savesigmask = sigmask;
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if (pselect(s[currmax-1]+1, &rdfs, NULL, NULL, NULL, &sigmask) < 0) {
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//perror("pselect");
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sigmask = savesigmask;
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continue;
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}
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for (i=0; i<currmax; i++) { /* check all CAN RAW sockets */
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if (FD_ISSET(s[i], &rdfs)) {
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nbytes = read(s[i], &frame, sizeof(struct can_frame));
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if (nbytes < 0) {
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perror("read");
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return 1;
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}
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if (nbytes < sizeof(struct can_frame)) {
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fprintf(stderr, "read: incomplete CAN frame\n");
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return 1;
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}
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stat[i].recv_frames++;
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stat[i].recv_bits_payload += frame.can_dlc*8;
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stat[i].recv_bits_total += frame.can_dlc*8;
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if (frame.can_id & CAN_EFF_FLAG)
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stat[i].recv_bits_total += 67;
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else
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stat[i].recv_bits_total += 47;
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}
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}
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}
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for (i=0; i<currmax; i++)
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close(s[i]);
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return 0;
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}
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