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authorFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
committerFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
commit9ce153ce7167c11adba8ac225edc7a707e97c6eb (patch)
tree9f6e849cce2dcc7e5b4e9e6252c843dc2d0787a2 /src/proc_interrupts.c
downloadnetdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.tar.xz
netdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.zip
Imported Upstream version 1.0.0upstream/1.0.0
Diffstat (limited to 'src/proc_interrupts.c')
-rwxr-xr-xsrc/proc_interrupts.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/src/proc_interrupts.c b/src/proc_interrupts.c
new file mode 100755
index 000000000..25482dfa7
--- /dev/null
+++ b/src/proc_interrupts.c
@@ -0,0 +1,164 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "common.h"
+#include "appconfig.h"
+#include "procfile.h"
+#include "rrd.h"
+#include "plugin_proc.h"
+#include "log.h"
+
+#define MAX_INTERRUPTS 256
+#define MAX_INTERRUPT_CPUS 256
+#define MAX_INTERRUPT_NAME 50
+
+struct interrupt {
+ int used;
+ char *id;
+ char name[MAX_INTERRUPT_NAME + 1];
+ unsigned long long value[MAX_INTERRUPT_CPUS];
+ unsigned long long total;
+};
+
+int do_proc_interrupts(int update_every, unsigned long long dt) {
+ static procfile *ff = NULL;
+ static int cpus = -1, do_per_core = -1;
+
+ if(dt) {};
+
+ if(do_per_core == -1) do_per_core = config_get_boolean("plugin:proc:/proc/interrupts", "interrupts per core", 1);
+
+ if(!ff) {
+ char filename[FILENAME_MAX + 1];
+ snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/interrupts");
+ ff = procfile_open(config_get("plugin:proc:/proc/interrupts", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+ }
+ if(!ff) return 1;
+
+ ff = procfile_readall(ff);
+ if(!ff) return 0; // we return 0, so that we will retry to open it next time
+
+ uint32_t lines = procfile_lines(ff), l;
+ uint32_t words = procfile_linewords(ff, 0), w;
+
+ // find how many CPUs are there
+ if(cpus == -1) {
+ cpus = 0;
+ for(w = 0; w < words ; w++) {
+ if(strncmp(procfile_lineword(ff, 0, w), "CPU", 3) == 0)
+ cpus++;
+ }
+
+ if(cpus > MAX_INTERRUPT_CPUS) cpus = MAX_INTERRUPT_CPUS;
+ }
+
+ if(!cpus) {
+ error("PLUGIN: PROC_INTERRUPTS: Cannot find the number of CPUs in /proc/interrupts");
+ return 1;
+ }
+
+ // allocate the size we need;
+ struct interrupt irrs[lines];
+ irrs[0].used = 0;
+
+ // loop through all lines
+ for(l = 1; l < lines ;l++) {
+ struct interrupt *irr = &irrs[l];
+ irr->used = 0;
+ irr->total = 0;
+
+ words = procfile_linewords(ff, l);
+ if(!words) continue;
+
+ irr->id = procfile_lineword(ff, l, 0);
+ if(!irr->id || !irr->id[0]) continue;
+
+ int idlen = strlen(irr->id);
+ if(irr->id[idlen - 1] == ':')
+ irr->id[idlen - 1] = '\0';
+
+ int c;
+ for(c = 0; c < cpus ;c++) {
+ if((c + 1) < (int)words)
+ irr->value[c] = strtoull(procfile_lineword(ff, l, (uint32_t)(c + 1)), NULL, 10);
+ else
+ irr->value[c] = 0;
+
+ irr->total += irr->value[c];
+ }
+
+ if(isdigit(irr->id[0]) && (uint32_t)(cpus + 2) < words) {
+ strncpy(irr->name, procfile_lineword(ff, l, words - 1), MAX_INTERRUPT_NAME);
+ irr->name[MAX_INTERRUPT_NAME] = '\0';
+ int nlen = strlen(irr->name);
+ if(nlen < (MAX_INTERRUPT_NAME-1)) {
+ irr->name[nlen] = '_';
+ strncpy(&irr->name[nlen + 1], irr->id, MAX_INTERRUPT_NAME - nlen);
+ irr->name[MAX_INTERRUPT_NAME] = '\0';
+ }
+ }
+ else {
+ strncpy(irr->name, irr->id, MAX_INTERRUPT_NAME);
+ irr->name[MAX_INTERRUPT_NAME] = '\0';
+ }
+
+ irr->used = 1;
+ }
+
+ RRDSET *st;
+
+ // --------------------------------------------------------------------
+
+ st = rrdset_find_bytype("system", "interrupts");
+ if(!st) {
+ st = rrdset_create("system", "interrupts", NULL, "interrupts", NULL, "System interrupts", "interrupts/s", 1000, update_every, RRDSET_TYPE_STACKED);
+
+ for(l = 0; l < lines ;l++) {
+ if(!irrs[l].used) continue;
+ rrddim_add(st, irrs[l].id, irrs[l].name, 1, 1, RRDDIM_INCREMENTAL);
+ }
+ }
+ else rrdset_next(st);
+
+ for(l = 0; l < lines ;l++) {
+ if(!irrs[l].used) continue;
+ rrddim_set(st, irrs[l].id, irrs[l].total);
+ }
+ rrdset_done(st);
+
+ if(do_per_core) {
+ int c;
+
+ for(c = 0; c < cpus ; c++) {
+ char id[256];
+ snprintf(id, 256, "cpu%d_interrupts", c);
+
+ st = rrdset_find_bytype("cpu", id);
+ if(!st) {
+ char name[256], title[256];
+ snprintf(name, 256, "cpu%d_interrupts", c);
+ snprintf(title, 256, "CPU%d Interrupts", c);
+ st = rrdset_create("cpu", id, name, "interrupts", "cpu.interrupts", title, "interrupts/s", 2000 + c, update_every, RRDSET_TYPE_STACKED);
+
+ for(l = 0; l < lines ;l++) {
+ if(!irrs[l].used) continue;
+ rrddim_add(st, irrs[l].id, irrs[l].name, 1, 1, RRDDIM_INCREMENTAL);
+ }
+ }
+ else rrdset_next(st);
+
+ for(l = 0; l < lines ;l++) {
+ if(!irrs[l].used) continue;
+ rrddim_set(st, irrs[l].id, irrs[l].value[c]);
+ }
+ rrdset_done(st);
+ }
+ }
+
+ return 0;
+}