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authorHelmut Grohne <helmut@subdivi.de>2008-06-21 11:33:06 +0000
committerHelmut Grohne <helmut@subdivi.de>2008-06-21 11:33:06 +0000
commitf481beb2dc4e6db37ea79f32960cbfa4a148eb90 (patch)
tree9c1f37c19b727d34fd8ab23e6e10b8866d46bb43 /cpu.c
downloadmunin-plugins-busybox-f481beb2dc4e6db37ea79f32960cbfa4a148eb90.tar.gz
initial tree
Diffstat (limited to 'cpu.c')
-rw-r--r--cpu.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/cpu.c b/cpu.c
new file mode 100644
index 0000000..120293d
--- /dev/null
+++ b/cpu.c
@@ -0,0 +1,157 @@
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include "common.h"
+
+#define SYSWARNING 30
+#define SYSCRITICAL 50
+#define USRWARNING 80
+
+int cpu(int argc, char **argv) {
+ FILE *f;
+ char buff[256], *s;
+ int ncpu=0, extinfo=0, scaleto100=0;
+ if(argc > 1) {
+ if(!strcmp(argv[1], "config")) {
+ s = getenv("scaleto100");
+ if(s && !strcmp(s, "yes"))
+ scaleto100=1;
+
+ if(!(f=fopen("/proc/stat", "r"))) {
+ fputs("cannot open /proc/stat\n", stderr);
+ return 1;
+ }
+ while(fgets(buff, 256, f)) {
+ if(!strncmp(buff, "cpu", 3)) {
+ if(isdigit(buff[3]))
+ ncpu++;
+ if(buff[3] == ' ') {
+ s = strtok(buff+4, " \t");
+ for(extinfo=0;strtok(NULL, " \t");extinfo++)
+ ;
+ }
+ }
+ }
+ fclose(f);
+
+ if(ncpu < 1 || extinfo < 4) {
+ fputs("cannot parse /proc/stat\n", stderr);
+ return 1;
+ }
+
+ puts("graph_title CPU usage");
+ if(extinfo == 7)
+ puts("graph_order system user nice idle iowait irq softirq");
+ else
+ puts("graph_order system user nice idle");
+ if(scaleto100)
+ puts("graph_args --base 1000 -r --lower-limit 0 --upper-limit 100");
+ else
+ printf("graph_args --base 1000 -r --lower-limit 0 --upper-limit %d\n", 100 * ncpu);
+ puts("graph_vlabel %\n"
+ "graph_scale no\n"
+ "graph_info This graph shows how CPU time is spent.\n"
+ "graph_category system\n"
+ "graph_period second\n"
+ "system.label system\n"
+ "system.draw AREA");
+ printf("system.max %d\n", 100 * ncpu);
+ puts("system.min 0\n"
+ "system.type DERIVE");
+ printf("system.warning %d\n", SYSWARNING * ncpu);
+ printf("system.critical %d\n", SYSCRITICAL * ncpu);
+ puts("system.info CPU time spent by the kernel in system activities\n"
+ "user.label user\n"
+ "user.draw STACK\n"
+ "user.min 0");
+ printf("user.max %d\n", 100 * ncpu);
+ printf("user.warning %d\n", USRWARNING * ncpu);
+ puts("user.type DERIVE\n"
+ "user.info CPU time spent by normal programs and daemons\n"
+ "nice.label nice\n"
+ "nice.draw STACK\n"
+ "nice.min 0");
+ printf("nice.max %d\n", 100 * ncpu);
+ puts("nice.type DERIVE\n"
+ "nice.info CPU time spent by nice(1)d programs\n"
+ "idle.label idle\n"
+ "idle.draw STACK\n"
+ "idle.min 0");
+ printf("idle.max %d\n", 100 * ncpu);
+ puts("idle.type DERIVE\n"
+ "idle.info Idle CPU time");
+ if(scaleto100)
+ printf("system.cdef system,%d,/\n"
+ "user.cdef user,%d,/\n"
+ "nice.cdef nice,%d,/\n"
+ "idle.cdef idle,%d,/\n", ncpu, ncpu, ncpu, ncpu);
+ if(extinfo == 7) {
+ puts("iowait.label iowait\n"
+ "iowait.draw STACK\n"
+ "iowait.min 0");
+ printf("iowait.max %d\n", 100 * ncpu);
+ puts("iowait.type DERIVE\n"
+ "iowait.info CPU time spent waiting for I/O operations to finish\n"
+ "irq.label irq\n"
+ "irq.draw STACK\n"
+ "irq.min 0");
+ printf("irq.max %d\n", 100 * ncpu);
+ puts("irq.type DERIVE\n"
+ "irq.info CPU time spent handling interrupts\n"
+ "softirq.label softirq\n"
+ "softirq.draw STACK\n"
+ "softirq.min 0");
+ printf("softirq.max %d\n", 100 * ncpu);
+ puts("softirq.type DERIVE\n"
+ "softirq.info CPU time spent handling \"batched\" interrupts");
+ if(scaleto100)
+ printf("iowait.cdef iowait,%d,/\n"
+ "irq.cdef irq,%d,/\n"
+ "softirq.cdef softirq,%d,/\n", ncpu, ncpu, ncpu);
+ }
+ return 0;
+ }
+ if(!strcmp(argv[1], "autoconf")) {
+ if(0 == access("/proc/stat", R_OK))
+ return writeyes();
+ else
+ return writeno("/proc/stat not readable");
+ }
+ }
+ if(!(f=fopen("/proc/stat", "r"))) {
+ fputs("cannot open /proc/stat\n", stderr);
+ return 1;
+ }
+ while(fgets(buff, 256, f)) {
+ if(!strncmp(buff, "cpu ", 4)) {
+ fclose(f);
+ if(!(s = strtok(buff+4, " \t")))
+ break;
+ printf("user.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ break;
+ printf("nice.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ break;
+ printf("system.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ break;
+ printf("idle.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ return 0;
+ printf("iowait.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ return 0;
+ printf("irq.value %s\n", s);
+ if(!(s = strtok(NULL, " \t")))
+ return 0;
+ printf("softirq.value %s\n", s);
+ return 0;
+ }
+ }
+ fclose(f);
+ fputs("no cpu line found in /proc/stat\n", stderr);
+ return 1;
+}