diff options
Diffstat (limited to 'src/proc_softirqs.c')
| -rwxr-xr-x | src/proc_softirqs.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/proc_softirqs.c b/src/proc_softirqs.c new file mode 100755 index 00000000..9373baae --- /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; +} |