diff options
Diffstat (limited to 'src/proc_net_softnet_stat.c')
-rw-r--r-- | src/proc_net_softnet_stat.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/proc_net_softnet_stat.c b/src/proc_net_softnet_stat.c new file mode 100644 index 000000000..b01315863 --- /dev/null +++ b/src/proc_net_softnet_stat.c @@ -0,0 +1,119 @@ +#include "common.h" + +static inline char *softnet_column_name(uint32_t column) { + switch(column) { + // https://github.com/torvalds/linux/blob/a7fd20d1c476af4563e66865213474a2f9f473a4/net/core/net-procfs.c#L161-L166 + case 0: return "processed"; + case 1: return "dropped"; + case 2: return "squeezed"; + case 9: return "received_rps"; + case 10: return "flow_limit_count"; + default: return NULL; + } +} + +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); + allocated_lines = lines; + allocated_columns = words; + data = mallocz((allocated_lines + 1) * allocated_columns * sizeof(uint32_t)); + } + + // initialize to zero + memset(data, 0, (allocated_lines + 1) * 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++) { + if(unlikely(softnet_column_name(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++) + if(unlikely(softnet_column_name(w))) + rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL); + } + else rrdset_next(st); + + for(w = 0; w < allocated_columns ;w++) + if(unlikely(softnet_column_name(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%u_softnet_stat", l); + + st = rrdset_find_bytype("cpu", id); + if(!st) { + char title[100+1]; + snprintfz(title, 100, "CPU%u 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++) + if(unlikely(softnet_column_name(w))) + rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL); + } + else rrdset_next(st); + + for(w = 0; w < allocated_columns ;w++) + if(unlikely(softnet_column_name(w))) + rrddim_set(st, softnet_column_name(w), data[((l + 1) * allocated_columns) + w]); + + rrdset_done(st); + } + } + + return 0; +} |