--- /dev/null
+# check for common /proc/net/softnet_stat errors
+
+ alarm: 1hour_netdev_backlog_exceeded
+ on: system.softnet_stat
+ lookup: sum -1h unaligned absolute of dropped
+ units: packets
+ every: 5m
+ warn: $this > 0
+ delay: down 30m multiplier 1.5 max 1h
+ info: number of packets dropped because sysctl net.core.netdev_max_backlog was exceeded
+ to: sysadmin
+
+ alarm: 1hour_netdev_budget_ran_outs
+ on: system.softnet_stat
+ lookup: sum -1h unaligned absolute of squeezed
+ units: events
+ every: 5m
+ warn: $this > 0
+ delay: down 30m multiplier 1.5 max 1h
+ info: number of times ksoftirq ran out of sysctl net.core.netdev_budget or time slice, with work remaining
+ to: sysadmin
+
+ alarm: 1hour_cpu_lock_collisions
+ on: system.softnet_stat
+ lookup: sum -1h unaligned absolute of collisions
+ units: collisions
+ every: 5m
+ warn: $this > 0
+ delay: down 30m multiplier 1.5 max 1h
+ info: number of times two cpus collided trying to get a network device queue lock
+ to: sysadmin
int vdo_proc_sys_kernel_random_entropy_avail = !config_get_boolean("plugin:proc", "/proc/sys/kernel/random/entropy_avail", 1);
int vdo_proc_interrupts = !config_get_boolean("plugin:proc", "/proc/interrupts", 1);
int vdo_proc_softirqs = !config_get_boolean("plugin:proc", "/proc/softirqs", 1);
+ int vdo_proc_net_softnet_stat = !config_get_boolean("plugin:proc", "/proc/net/softnet_stat", 1);
int vdo_proc_loadavg = !config_get_boolean("plugin:proc", "/proc/loadavg", 1);
int vdo_sys_kernel_mm_ksm = !config_get_boolean("plugin:proc", "/sys/kernel/mm/ksm", 1);
int vdo_cpu_netdata = !config_get_boolean("plugin:proc", "netdata server resources", 1);
unsigned long long sutime_proc_sys_kernel_random_entropy_avail = 0ULL;
unsigned long long sutime_proc_interrupts = 0ULL;
unsigned long long sutime_proc_softirqs = 0ULL;
+ unsigned long long sutime_proc_net_softnet_stat = 0ULL;
unsigned long long sutime_proc_loadavg = 0ULL;
unsigned long long sutime_sys_kernel_mm_ksm = 0ULL;
}
if(unlikely(netdata_exit)) break;
+ if(!vdo_proc_net_softnet_stat) {
+ debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_proc_net_softnet_stat().");
+ sunow = time_usec();
+ vdo_proc_net_softnet_stat = do_proc_net_softnet_stat(rrd_update_every, (sutime_proc_net_softnet_stat > 0)?sunow - sutime_proc_net_softnet_stat:0ULL);
+ sutime_proc_net_softnet_stat = sunow;
+ }
+ if(unlikely(netdata_exit)) break;
+
if(!vdo_proc_sys_kernel_random_entropy_avail) {
debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_proc_sys_kernel_random_entropy_avail().");
sunow = time_usec();
--- /dev/null
+#include "common.h"
+
+static inline char *softnet_column_name(uint32_t column) {
+ static char buf[4] = "c00";
+ char *s;
+
+ switch(column) {
+ case 0: s = "total"; break;
+ case 1: s = "dropped"; break;
+ case 2: s = "squeezed"; break;
+ case 8: s = "collisions"; break;
+ default: {
+ uint32_t c = column + 1;
+ buf[1] = '0' + ( c / 10); c = c % 10;
+ buf[2] = '0' + c;
+ s = buf;
+ break;
+ }
+ }
+
+ return s;
+}
+
+int do_proc_net_softnet_stat(int update_every, unsigned long long dt) {
+ (void)dt;
+
+ static procfile *ff = NULL;
+ static int do_per_core = -1;
+ static uint32_t allocated_lines = 0, allocated_columns = 0, *data = NULL;
+
+ if(do_per_core == -1) do_per_core = config_get_boolean("plugin:proc:/proc/net/softnet_stat", "softnet_stat per core", 1);
+
+ if(!ff) {
+ char filename[FILENAME_MAX + 1];
+ snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/softnet_stat");
+ ff = procfile_open(config_get("plugin:proc:/proc/net/softnet_stat", "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;
+
+ if(!lines || !words) {
+ error("Cannot read /proc/net/softnet_stat, %u lines and %u columns reported.", lines, words);
+ return 1;
+ }
+
+ if(lines > 200) lines = 200;
+ if(words > 50) words = 50;
+
+ if(unlikely(!data || lines > allocated_lines || words > allocated_columns)) {
+ freez(data);
+ data = mallocz((lines + 1) * words * sizeof(uint32_t));
+ allocated_lines = lines;
+ allocated_columns = words;
+ }
+
+ // initialize to zero
+ bzero(data, allocated_lines * allocated_columns * sizeof(uint32_t));
+
+ // parse the values
+ for(l = 0; l < lines ;l++) {
+ words = procfile_linewords(ff, l);
+ if(!words) continue;
+
+ if(words > allocated_columns) words = allocated_columns;
+
+ for(w = 0; w < words ; w++) {
+ uint32_t t = strtoul(procfile_lineword(ff, l, w), NULL, 16);
+ data[w] += t;
+ data[((l + 1) * allocated_columns) + w] = t;
+ }
+ }
+
+ if(data[(lines * allocated_columns)] == 0)
+ lines--;
+
+ RRDSET *st;
+
+ // --------------------------------------------------------------------
+
+ st = rrdset_find_bytype("system", "softnet_stat");
+ if(!st) {
+ st = rrdset_create("system", "softnet_stat", NULL, "softnet_stat", NULL, "System softnet_stat", "events/s", 955, update_every, RRDSET_TYPE_LINE);
+ for(w = 0; w < allocated_columns ;w++)
+ rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next(st);
+
+ for(w = 0; w < allocated_columns ;w++)
+ rrddim_set(st, softnet_column_name(w), data[w]);
+
+ rrdset_done(st);
+
+ if(do_per_core) {
+ for(l = 0; l < lines ;l++) {
+ char id[50+1];
+ snprintfz(id, 50, "cpu%d_softnet_stat", l);
+
+ st = rrdset_find_bytype("cpu", id);
+ if(!st) {
+ char title[100+1];
+ snprintfz(title, 100, "CPU%d softnet_stat", l);
+
+ st = rrdset_create("cpu", id, NULL, "softnet_stat", NULL, title, "events/s", 4101 + l, update_every, RRDSET_TYPE_LINE);
+ for(w = 0; w < allocated_columns ;w++)
+ rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next(st);
+
+ for(w = 0; w < allocated_columns ;w++)
+ rrddim_set(st, softnet_column_name(w), data[((l + 1) * allocated_columns) + w]);
+
+ rrdset_done(st);
+ }
+ }
+
+ return 0;
+}
projects / netdata.git / commitdiff