mirror of
https://github.com/munin-monitoring/contrib.git
synced 2018-11-08 00:59:34 +01:00
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "common.h"
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int interrupts(int argc, char **argv) {
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FILE *f;
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char buff[256];
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if(argc > 1) {
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if(!strcmp(argv[1], "config")) {
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puts("graph_title Interrupts & context switches\n"
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"graph_args --base 1000 -l 0\n"
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"graph_vlabel interrupts & ctx switches / ${graph_period}\n"
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"graph_category system\n"
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"graph_info This graph shows the number of interrupts and context switches on the system. These are typically high on a busy system.\n"
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"intr.info Interrupts are events that alter sequence of instructions executed by a processor. They can come from either hardware (exceptions, NMI, IRQ) or software.");
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puts("ctx.info A context switch occurs when a multitasking operatings system suspends the currently running process, and starts executing another.\n"
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"intr.label interrupts\n"
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"ctx.label context switches\n"
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"intr.type DERIVE\n"
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"ctx.type DERIVE\n"
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"intr.max 100000\n"
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"ctx.max 100000\n"
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"intr.min 0\n"
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"ctx.min 0");
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print_warncrit("intr");
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print_warncrit("ctx");
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return 0;
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}
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if(!strcmp(argv[1], "autoconf")) {
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if(0 == access(PROC_STAT, R_OK))
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return writeyes();
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else
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return writeno(PROC_STAT " not readable");
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}
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}
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if(!(f=fopen(PROC_STAT, "r"))) {
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fputs("cannot open " PROC_STAT "\n", stderr);
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return 1;
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}
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while(fgets(buff, 256, f)) {
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if(!strncmp(buff, "intr ", 5)) {
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buff[5 + strcspn(buff + 5, " \t\n")] = '\0';
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printf("intr.value %s\n", buff+5);
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} else if(!strncmp(buff, "ctxt ", 5)) {
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buff[5 + strcspn(buff + 5, " \t\n")] = '\0';
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printf("ctx.value %s\n", buff+5);
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}
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}
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fclose(f);
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return 0;
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}
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