Imported Upstream version 1.0.0upstream/1.0.0

1 files changed, 160 insertions, 0 deletions

diff --git a/src/proc_softirqs.c b/src/proc_softirqs.c
new file mode 100755
index 000000000..9373baaec
--- /dev/null
+++ b/src/proc_softirqs.c
@@ -0,0 +1,160 @@
+#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_softirqs(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/softirqs", "interrupts per core", 1);
+
+	if(!ff) {
+		char filename[FILENAME_MAX + 1];
+		snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/softirqs");
+		ff = procfile_open(config_get("plugin:proc:/proc/softirqs", "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_SOFTIRQS: Cannot find the number of CPUs in /proc/softirqs");
+		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];
+		}
+
+		strncpy(irr->name, irr->id, MAX_INTERRUPT_NAME);
+		irr->name[MAX_INTERRUPT_NAME] = '\0';
+
+		irr->used = 1;
+	}
+
+	RRDSET *st;
+
+	// --------------------------------------------------------------------
+
+	st = rrdset_find_bytype("system", "softirqs");
+	if(!st) {
+		st = rrdset_create("system", "softirqs", NULL, "softirqs", NULL, "System softirqs", "softirqs/s", 950, 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_softirqs", c);
+
+			st = rrdset_find_bytype("cpu", id);
+			if(!st) {
+				// find if everything is zero
+				unsigned long long core_sum = 0 ;
+				for(l = 0; l < lines ;l++) {
+					if(!irrs[l].used) continue;
+					core_sum += irrs[l].value[c];
+				}
+				if(core_sum == 0) continue; // try next core
+
+				char name[256], title[256];
+				snprintf(name, 256, "cpu%d_softirqs", c);
+				snprintf(title, 256, "CPU%d softirqs", c);
+				st = rrdset_create("cpu", id, name, "softirqs", "cpu.softirqs", title, "softirqs/s", 3000 + 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;
+}