static struct interrupt *irrs = NULL;
static int allocated = 0;
- if(lines > allocated) {
+ if(unlikely(lines > allocated)) {
irrs = (struct interrupt *)reallocz(irrs, lines * recordsize(cpus));
allocated = lines;
}
}
int do_proc_softirqs(int update_every, unsigned long long dt) {
+ (void)dt;
+
static procfile *ff = NULL;
static int cpus = -1, do_per_core = -1;
struct interrupt *irrs = NULL;
- if(dt) {};
-
- if(do_per_core == -1) do_per_core = config_get_boolean("plugin:proc:/proc/softirqs", "interrupts per core", 1);
+ if(unlikely(do_per_core == -1)) do_per_core = config_get_boolean("plugin:proc:/proc/softirqs", "interrupts per core", 1);
- if(!ff) {
+ if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(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(unlikely(!ff)) return 1;
}
- 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
+ if(unlikely(!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;
- if(!lines) {
+ if(unlikely(!lines)) {
error("Cannot read /proc/softirqs, zero lines reported.");
return 1;
}
// find how many CPUs are there
- if(cpus == -1) {
+ if(unlikely(cpus == -1)) {
cpus = 0;
for(w = 0; w < words ; w++) {
- if(strncmp(procfile_lineword(ff, 0, w), "CPU", 3) == 0)
+ if(unlikely(strncmp(procfile_lineword(ff, 0, w), "CPU", 3) == 0))
cpus++;
}
}
- if(!cpus) {
+ if(unlikely(!cpus)) {
error("PLUGIN: PROC_SOFTIRQS: Cannot find the number of CPUs in /proc/softirqs");
return 1;
}
irr->total = 0;
words = procfile_linewords(ff, l);
- if(!words) continue;
+ if(unlikely(!words)) continue;
irr->id = procfile_lineword(ff, l, 0);
- if(!irr->id || !irr->id[0]) continue;
+ if(unlikely(!irr->id || !irr->id[0])) continue;
int idlen = strlen(irr->id);
- if(irr->id[idlen - 1] == ':')
+ if(unlikely(irr->id[idlen - 1] == ':'))
irr->id[idlen - 1] = '\0';
int c;
for(c = 0; c < cpus ;c++) {
- if((c + 1) < (int)words)
+ if(unlikely((c + 1) < (int)words))
irr->value[c] = strtoull(procfile_lineword(ff, l, (uint32_t)(c + 1)), NULL, 10);
else
irr->value[c] = 0;
// --------------------------------------------------------------------
st = rrdset_find_bytype("system", "softirqs");
- if(!st) {
+ if(unlikely(!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++) {
struct interrupt *irr = irrindex(irrs, l, cpus);
- if(!irr->used) continue;
+ if(unlikely(!irr->used)) continue;
rrddim_add(st, irr->id, irr->name, 1, 1, RRDDIM_INCREMENTAL);
}
}
for(l = 0; l < lines ;l++) {
struct interrupt *irr = irrindex(irrs, l, cpus);
- if(!irr->used) continue;
+ if(unlikely(!irr->used)) continue;
rrddim_set(st, irr->id, irr->total);
}
rrdset_done(st);
snprintfz(id, 50, "cpu%d_softirqs", c);
st = rrdset_find_bytype("cpu", id);
- if(!st) {
+ if(unlikely(!st)) {
// find if everything is zero
unsigned long long core_sum = 0 ;
for(l = 0; l < lines ;l++) {
struct interrupt *irr = irrindex(irrs, l, cpus);
- if(!irr->used) continue;
+ if(unlikely(!irr->used)) continue;
core_sum += irr->value[c];
}
- if(core_sum == 0) continue; // try next core
+ if(unlikely(core_sum == 0)) continue; // try next core
char title[100+1];
snprintfz(title, 100, "CPU%d softirqs", c);
for(l = 0; l < lines ;l++) {
struct interrupt *irr = irrindex(irrs, l, cpus);
- if(!irr->used) continue;
+ if(unlikely(!irr->used)) continue;
rrddim_add(st, irr->id, irr->name, 1, 1, RRDDIM_INCREMENTAL);
}
}
for(l = 0; l < lines ;l++) {
struct interrupt *irr = irrindex(irrs, l, cpus);
- if(!irr->used) continue;
+ if(unlikely(!irr->used)) continue;
rrddim_set(st, irr->id, irr->value[c]);
}
rrdset_done(st);