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// SPDX-License-Identifier: GPL-3.0-or-later
#include "debugfs_plugin.h"
#define NETDATA_ORDER_FRAGMENTATION 11
static char *orders[NETDATA_ORDER_FRAGMENTATION] = { "order0", "order1", "order2", "order3", "order4",
"order5", "order6", "order7", "order8", "order9",
"order10"
};
static struct netdata_extrafrag {
char *node_zone;
uint32_t hash;
char *id;
collected_number orders[NETDATA_ORDER_FRAGMENTATION];
struct netdata_extrafrag *next;
} *netdata_extrafrags_root = NULL;
static struct netdata_extrafrag *find_or_create_extrafrag(const char *name)
{
struct netdata_extrafrag *extrafrag;
uint32_t hash = simple_hash(name);
// search it, from beginning to the end
for (extrafrag = netdata_extrafrags_root ; extrafrag ; extrafrag = extrafrag->next) {
if (unlikely(hash == extrafrag->hash && !strcmp(name, extrafrag->node_zone))) {
return extrafrag;
}
}
extrafrag = callocz(1, sizeof(struct netdata_extrafrag));
extrafrag->node_zone = strdupz(name);
extrafrag->hash = hash;
if (netdata_extrafrags_root) {
struct netdata_extrafrag *last_node;
for (last_node = netdata_extrafrags_root; last_node->next ; last_node = last_node->next);
last_node->next = extrafrag;
} else
netdata_extrafrags_root = extrafrag;
return extrafrag;
}
static void extfrag_send_chart(char *chart_id, collected_number *values)
{
int i;
fprintf(stdout, "BEGIN mem.fragmentation_index_%s\n", chart_id);
for (i = 0; i < NETDATA_ORDER_FRAGMENTATION; i++) {
fprintf(stdout, "SET %s = %lld\n", orders[i], values[i]);
}
fprintf(stdout, "END\n");
fflush(stdout);
}
int do_debugfs_extfrag(int update_every, const char *name) {
static procfile *ff = NULL;;
if (unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/debug/extfrag/extfrag_index");
ff = procfile_open(filename, " \t,", PROCFILE_FLAG_DEFAULT);
if (unlikely(!ff))
return 1;
}
ff = procfile_readall(ff);
if (unlikely(!ff))
return 1;
size_t l, i, j, lines = procfile_lines(ff);
for (l = 0; l < lines; l++) {
char chart_id[64];
char zone_lowercase[32];
if (unlikely(procfile_linewords(ff, l) < 15)) continue;
char *zone = procfile_lineword(ff, l, 3);
strncpyz(zone_lowercase, zone, 31);
debugfs2lower(zone_lowercase);
char *id = procfile_lineword(ff, l, 1);
snprintfz(chart_id, 63, "node_%s_%s", id, zone_lowercase);
debugfs2lower(chart_id);
struct netdata_extrafrag *extrafrag = find_or_create_extrafrag(chart_id);
collected_number *line_orders = extrafrag->orders;
for (i = 4, j = 0 ; i < 15; i++, j++) {
NETDATA_DOUBLE value = str2ndd(procfile_lineword(ff, l, i), NULL);
line_orders[j] = (collected_number) (value * 1000.0);
}
if (unlikely(!extrafrag->id)) {
extrafrag->id = extrafrag->node_zone;
fprintf(
stdout,
"CHART mem.fragmentation_index_%s '' 'Memory fragmentation index for each order' 'index' 'fragmentation' 'mem.numa_node_zone_fragmentation_index' 'line' %d %d '' 'debugfs.plugin' '%s'\n",
extrafrag->node_zone,
NETDATA_CHART_PRIO_MEM_FRAGMENTATION,
update_every,
name);
for (i = 0; i < NETDATA_ORDER_FRAGMENTATION; i++) {
fprintf(stdout, "DIMENSION '%s' '%s' absolute 1 1000 ''\n", orders[i], orders[i]);
}
fprintf(
stdout,
"CLABEL 'numa_node' 'node%s' 1\n"
"CLABEL 'zone' '%s' 1\n"
"CLABEL_COMMIT\n",
id,
zone);
}
extfrag_send_chart(chart_id, line_orders);
}
return 0;
}
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