-#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 cpu_interrupt {
+ unsigned long long value;
+ RRDDIM *rd;
+};
+
struct interrupt {
- int used;
- char *id;
- char name[MAX_INTERRUPT_NAME + 1];
- unsigned long long value[MAX_INTERRUPT_CPUS];
- unsigned long long total;
+ int used;
+ char *id;
+ char name[MAX_INTERRUPT_NAME + 1];
+ RRDDIM *rd;
+ unsigned long long total;
+ struct cpu_interrupt cpu[];
};
-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, "system", "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 family[256];
- snprintf(family, 256, "cpu%d", 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, family, 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;
+// since each interrupt is variable in size
+// we use this to calculate its record size
+#define recordsize(cpus) (sizeof(struct interrupt) + (cpus * sizeof(struct cpu_interrupt)))
+
+// given a base, get a pointer to each record
+#define irrindex(base, line, cpus) ((struct interrupt *)&((char *)(base))[line * recordsize(cpus)])
+
+static inline struct interrupt *get_interrupts_array(size_t lines, int cpus) {
+ static struct interrupt *irrs = NULL;
+ static size_t allocated = 0;
+
+ if(unlikely(lines != allocated)) {
+ size_t l;
+ int c;
+
+ irrs = (struct interrupt *)reallocz(irrs, lines * recordsize(cpus));
+
+ // reset all interrupt RRDDIM pointers as any line could have shifted
+ for(l = 0; l < lines ;l++) {
+ struct interrupt *irr = irrindex(irrs, l, cpus);
+ irr->rd = NULL;
+ irr->name[0] = '\0';
+ for(c = 0; c < cpus ;c++)
+ irr->cpu[c].rd = NULL;
+ }
+
+ allocated = lines;
+ }
+
+ return irrs;
+}
+
+int do_proc_interrupts(int update_every, usec_t dt) {
+ (void)dt;
+ static procfile *ff = NULL;
+ static int cpus = -1, do_per_core = -1;
+ struct interrupt *irrs = NULL;
+
+ if(unlikely(do_per_core == -1))
+ do_per_core = config_get_boolean("plugin:proc:/proc/interrupts", "interrupts per core", 1);
+
+ if(unlikely(!ff)) {
+ char filename[FILENAME_MAX + 1];
+ snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/interrupts");
+ ff = procfile_open(config_get("plugin:proc:/proc/interrupts", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+ }
+ if(unlikely(!ff))
+ return 1;
+
+ ff = procfile_readall(ff);
+ if(unlikely(!ff))
+ return 0; // we return 0, so that we will retry to open it next time
+
+ size_t lines = procfile_lines(ff), l;
+ size_t words = procfile_linewords(ff, 0);
+
+ if(unlikely(!lines)) {
+ error("Cannot read /proc/interrupts, zero lines reported.");
+ return 1;
+ }
+
+ // find how many CPUs are there
+ if(unlikely(cpus == -1)) {
+ uint32_t w;
+ cpus = 0;
+ for(w = 0; w < words ; w++) {
+ if(likely(strncmp(procfile_lineword(ff, 0, w), "CPU", 3) == 0))
+ cpus++;
+ }
+ }
+
+ if(unlikely(!cpus)) {
+ error("PLUGIN: PROC_INTERRUPTS: Cannot find the number of CPUs in /proc/interrupts");
+ return 1;
+ }
+
+ // allocate the size we need;
+ irrs = get_interrupts_array(lines, cpus);
+ irrs[0].used = 0;
+
+ // loop through all lines
+ for(l = 1; l < lines ;l++) {
+ struct interrupt *irr = irrindex(irrs, l, cpus);
+ irr->used = 0;
+ irr->total = 0;
+
+ words = procfile_linewords(ff, l);
+ if(unlikely(!words)) continue;
+
+ irr->id = procfile_lineword(ff, l, 0);
+ if(unlikely(!irr->id || !irr->id[0])) continue;
+
+ size_t idlen = strlen(irr->id);
+ if(unlikely(idlen && irr->id[idlen - 1] == ':'))
+ irr->id[idlen - 1] = '\0';
+
+ int c;
+ for(c = 0; c < cpus ;c++) {
+ if(likely((c + 1) < (int)words))
+ irr->cpu[c].value = str2ull(procfile_lineword(ff, l, (uint32_t)(c + 1)));
+ else
+ irr->cpu[c].value = 0;
+
+ irr->total += irr->cpu[c].value;
+ }
+
+ if(unlikely(isdigit(irr->id[0]) && (uint32_t)(cpus + 2) < words)) {
+ strncpyz(irr->name, procfile_lineword(ff, l, words - 1), MAX_INTERRUPT_NAME);
+ size_t nlen = strlen(irr->name);
+ idlen = strlen(irr->id);
+ if(likely(nlen + 1 + idlen <= MAX_INTERRUPT_NAME)) {
+ irr->name[nlen] = '_';
+ strncpyz(&irr->name[nlen + 1], irr->id, MAX_INTERRUPT_NAME - nlen - 1);
+ }
+ else {
+ irr->name[MAX_INTERRUPT_NAME - idlen - 1] = '_';
+ strncpyz(&irr->name[MAX_INTERRUPT_NAME - idlen], irr->id, idlen);
+ }
+ }
+ else {
+ strncpyz(irr->name, irr->id, MAX_INTERRUPT_NAME);
+ }
+
+ irr->used = 1;
+ }
+
+ RRDSET *st;
+
+ // --------------------------------------------------------------------
+
+ st = rrdset_find_bytype_localhost("system", "interrupts");
+ if(unlikely(!st)) st = rrdset_create_localhost("system", "interrupts", NULL, "interrupts", NULL, "System interrupts"
+ , "interrupts/s", 1000, update_every, RRDSET_TYPE_STACKED);
+ else rrdset_next(st);
+
+ for(l = 0; l < lines ;l++) {
+ struct interrupt *irr = irrindex(irrs, l, cpus);
+ if(unlikely(!irr->used)) continue;
+ // some interrupt may have changed without changing the total number of lines
+ // if the same number of interrupts have been added and removed between two
+ // calls of this function.
+ if(unlikely(!irr->rd || strncmp(irr->rd->name, irr->name, MAX_INTERRUPT_NAME) != 0)) {
+ irr->rd = rrddim_find(st, irr->id);
+ if(unlikely(!irr->rd))
+ irr->rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+ else
+ rrddim_set_name(st, irr->rd, irr->name);
+
+ // also reset per cpu RRDDIMs to avoid repeating strncmp() in the per core loop
+ if(likely(do_per_core)) {
+ int c;
+ for (c = 0; c < cpus ;c++)
+ irr->cpu[c].rd = NULL;
+ }
+ }
+ rrddim_set_by_pointer(st, irr->rd, irr->total);
+ }
+ rrdset_done(st);
+
+ if(likely(do_per_core)) {
+ int c;
+
+ for(c = 0; c < cpus ;c++) {
+ char id[50+1];
+ snprintfz(id, 50, "cpu%d_interrupts", c);
+
+ st = rrdset_find_bytype_localhost("cpu", id);
+ if(unlikely(!st)) {
+ char title[100+1];
+ snprintfz(title, 100, "CPU%d Interrupts", c);
+ st = rrdset_create_localhost("cpu", id, NULL, "interrupts", "cpu.interrupts", title, "interrupts/s",
+ 1100 + c, update_every, RRDSET_TYPE_STACKED);
+ }
+ else rrdset_next(st);
+
+ for(l = 0; l < lines ;l++) {
+ struct interrupt *irr = irrindex(irrs, l, cpus);
+ if(unlikely(!irr->used)) continue;
+ if(unlikely(!irr->cpu[c].rd)) {
+ irr->cpu[c].rd = rrddim_find(st, irr->id);
+ if(unlikely(!irr->cpu[c].rd))
+ irr->cpu[c].rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+ else
+ rrddim_set_name(st, irr->cpu[c].rd, irr->name);
+ }
+ rrddim_set_by_pointer(st, irr->cpu[c].rd, irr->cpu[c].value);
+ }
+ rrdset_done(st);
+ }
+ }
+
+ return 0;
}
projects / netdata.git / blobdiff