3 static inline char *softnet_column_name(size_t column) {
5 // https://github.com/torvalds/linux/blob/a7fd20d1c476af4563e66865213474a2f9f473a4/net/core/net-procfs.c#L161-L166
6 case 0: return "processed";
7 case 1: return "dropped";
8 case 2: return "squeezed";
9 case 9: return "received_rps";
10 case 10: return "flow_limit_count";
15 int do_proc_net_softnet_stat(int update_every, usec_t dt) {
18 static procfile *ff = NULL;
19 static int do_per_core = -1;
20 static size_t allocated_lines = 0, allocated_columns = 0;
21 static uint32_t *data = NULL;
23 if(unlikely(do_per_core == -1)) do_per_core = config_get_boolean("plugin:proc:/proc/net/softnet_stat", "softnet_stat per core", 1);
26 char filename[FILENAME_MAX + 1];
27 snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/softnet_stat");
28 ff = procfile_open(config_get("plugin:proc:/proc/net/softnet_stat", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
29 if(unlikely(!ff)) return 1;
32 ff = procfile_readall(ff);
33 if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
35 size_t lines = procfile_lines(ff), l;
36 size_t words = procfile_linewords(ff, 0), w;
38 if(unlikely(!lines || !words)) {
39 error("Cannot read /proc/net/softnet_stat, %zu lines and %zu columns reported.", lines, words);
43 if(unlikely(lines > 200)) lines = 200;
44 if(unlikely(words > 50)) words = 50;
46 if(unlikely(!data || lines > allocated_lines || words > allocated_columns)) {
48 allocated_lines = lines;
49 allocated_columns = words;
50 data = mallocz((allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
54 memset(data, 0, (allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
57 for(l = 0; l < lines ;l++) {
58 words = procfile_linewords(ff, l);
59 if(unlikely(!words)) continue;
61 if(unlikely(words > allocated_columns))
62 words = allocated_columns;
64 for(w = 0; w < words ; w++) {
65 if(unlikely(softnet_column_name(w))) {
66 uint32_t t = (uint32_t)strtoul(procfile_lineword(ff, l, w), NULL, 16);
68 data[((l + 1) * allocated_columns) + w] = t;
73 if(unlikely(data[(lines * allocated_columns)] == 0))
78 // --------------------------------------------------------------------
80 st = rrdset_find_bytype("system", "softnet_stat");
82 st = rrdset_create("system", "softnet_stat", NULL, "softnet_stat", NULL, "System softnet_stat", "events/s", 955, update_every, RRDSET_TYPE_LINE);
83 for(w = 0; w < allocated_columns ;w++)
84 if(unlikely(softnet_column_name(w)))
85 rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
89 for(w = 0; w < allocated_columns ;w++)
90 if(unlikely(softnet_column_name(w)))
91 rrddim_set(st, softnet_column_name(w), data[w]);
96 for(l = 0; l < lines ;l++) {
98 snprintfz(id, 50, "cpu%zu_softnet_stat", l);
100 st = rrdset_find_bytype("cpu", id);
103 snprintfz(title, 100, "CPU%zu softnet_stat", l);
105 st = rrdset_create("cpu", id, NULL, "softnet_stat", NULL, title, "events/s", 4101 + l, update_every, RRDSET_TYPE_LINE);
106 for(w = 0; w < allocated_columns ;w++)
107 if(unlikely(softnet_column_name(w)))
108 rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
110 else rrdset_next(st);
112 for(w = 0; w < allocated_columns ;w++)
113 if(unlikely(softnet_column_name(w)))
114 rrddim_set(st, softnet_column_name(w), data[((l + 1) * allocated_columns) + w]);