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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_proc.h"
#define PLUGIN_PROC_MODULE_VMSTAT_NAME "/proc/vmstat"
int do_proc_vmstat(int update_every, usec_t dt) {
(void)dt;
static procfile *ff = NULL;
static int do_swapio = -1, do_io = -1, do_pgfaults = -1, do_numa = -1;
static int has_numa = -1;
static ARL_BASE *arl_base = NULL;
static unsigned long long numa_foreign = 0ULL;
static unsigned long long numa_hint_faults = 0ULL;
static unsigned long long numa_hint_faults_local = 0ULL;
static unsigned long long numa_huge_pte_updates = 0ULL;
static unsigned long long numa_interleave = 0ULL;
static unsigned long long numa_local = 0ULL;
static unsigned long long numa_other = 0ULL;
static unsigned long long numa_pages_migrated = 0ULL;
static unsigned long long numa_pte_updates = 0ULL;
static unsigned long long pgfault = 0ULL;
static unsigned long long pgmajfault = 0ULL;
static unsigned long long pgpgin = 0ULL;
static unsigned long long pgpgout = 0ULL;
static unsigned long long pswpin = 0ULL;
static unsigned long long pswpout = 0ULL;
if(unlikely(!arl_base)) {
do_swapio = config_get_boolean_ondemand("plugin:proc:/proc/vmstat", "swap i/o", CONFIG_BOOLEAN_AUTO);
do_io = config_get_boolean("plugin:proc:/proc/vmstat", "disk i/o", 1);
do_pgfaults = config_get_boolean("plugin:proc:/proc/vmstat", "memory page faults", 1);
do_numa = config_get_boolean_ondemand("plugin:proc:/proc/vmstat", "system-wide numa metric summary", CONFIG_BOOLEAN_AUTO);
arl_base = arl_create("vmstat", NULL, 60);
arl_expect(arl_base, "pgfault", &pgfault);
arl_expect(arl_base, "pgmajfault", &pgmajfault);
arl_expect(arl_base, "pgpgin", &pgpgin);
arl_expect(arl_base, "pgpgout", &pgpgout);
arl_expect(arl_base, "pswpin", &pswpin);
arl_expect(arl_base, "pswpout", &pswpout);
if(do_numa == CONFIG_BOOLEAN_YES || (do_numa == CONFIG_BOOLEAN_AUTO &&
(get_numa_node_count() >= 2 ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
arl_expect(arl_base, "numa_foreign", &numa_foreign);
arl_expect(arl_base, "numa_hint_faults_local", &numa_hint_faults_local);
arl_expect(arl_base, "numa_hint_faults", &numa_hint_faults);
arl_expect(arl_base, "numa_huge_pte_updates", &numa_huge_pte_updates);
arl_expect(arl_base, "numa_interleave", &numa_interleave);
arl_expect(arl_base, "numa_local", &numa_local);
arl_expect(arl_base, "numa_other", &numa_other);
arl_expect(arl_base, "numa_pages_migrated", &numa_pages_migrated);
arl_expect(arl_base, "numa_pte_updates", &numa_pte_updates);
}
else {
// Do not expect numa metrics when they are not needed.
// By not adding them, the ARL will stop processing the file
// when all the expected metrics are collected.
// Also ARL will not parse their values.
has_numa = 0;
do_numa = CONFIG_BOOLEAN_NO;
}
}
if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/vmstat");
ff = procfile_open(config_get("plugin:proc:/proc/vmstat", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
if(unlikely(!ff)) return 1;
}
ff = procfile_readall(ff);
if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
size_t lines = procfile_lines(ff), l;
arl_begin(arl_base);
for(l = 0; l < lines ;l++) {
size_t words = procfile_linewords(ff, l);
if(unlikely(words < 2)) {
if(unlikely(words)) error("Cannot read /proc/vmstat line %zu. Expected 2 params, read %zu.", l, words);
continue;
}
if(unlikely(arl_check(arl_base,
procfile_lineword(ff, l, 0),
procfile_lineword(ff, l, 1)))) break;
}
// --------------------------------------------------------------------
if(do_swapio == CONFIG_BOOLEAN_YES || (do_swapio == CONFIG_BOOLEAN_AUTO &&
(pswpin || pswpout ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
do_swapio = CONFIG_BOOLEAN_YES;
static RRDSET *st_swapio = NULL;
static RRDDIM *rd_in = NULL, *rd_out = NULL;
if(unlikely(!st_swapio)) {
st_swapio = rrdset_create_localhost(
"system"
, "swapio"
, NULL
, "swap"
, NULL
, "Swap I/O"
, "KiB/s"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_VMSTAT_NAME
, NETDATA_CHART_PRIO_SYSTEM_SWAPIO
, update_every
, RRDSET_TYPE_AREA
);
rd_in = rrddim_add(st_swapio, "in", NULL, sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
rd_out = rrddim_add(st_swapio, "out", NULL, -sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
}
else rrdset_next(st_swapio);
rrddim_set_by_pointer(st_swapio, rd_in, pswpin);
rrddim_set_by_pointer(st_swapio, rd_out, pswpout);
rrdset_done(st_swapio);
}
// --------------------------------------------------------------------
if(do_io) {
static RRDSET *st_io = NULL;
static RRDDIM *rd_in = NULL, *rd_out = NULL;
if(unlikely(!st_io)) {
st_io = rrdset_create_localhost(
"system"
, "pgpgio"
, NULL
, "disk"
, NULL
, "Memory Paged from/to disk"
, "KiB/s"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_VMSTAT_NAME
, NETDATA_CHART_PRIO_SYSTEM_PGPGIO
, update_every
, RRDSET_TYPE_AREA
);
rd_in = rrddim_add(st_io, "in", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_out = rrddim_add(st_io, "out", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
}
else rrdset_next(st_io);
rrddim_set_by_pointer(st_io, rd_in, pgpgin);
rrddim_set_by_pointer(st_io, rd_out, pgpgout);
rrdset_done(st_io);
}
// --------------------------------------------------------------------
if(do_pgfaults) {
static RRDSET *st_pgfaults = NULL;
static RRDDIM *rd_minor = NULL, *rd_major = NULL;
if(unlikely(!st_pgfaults)) {
st_pgfaults = rrdset_create_localhost(
"mem"
, "pgfaults"
, NULL
, "system"
, NULL
, "Memory Page Faults"
, "faults/s"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_VMSTAT_NAME
, NETDATA_CHART_PRIO_MEM_SYSTEM_PGFAULTS
, update_every
, RRDSET_TYPE_LINE
);
rrdset_flag_set(st_pgfaults, RRDSET_FLAG_DETAIL);
rd_minor = rrddim_add(st_pgfaults, "minor", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_major = rrddim_add(st_pgfaults, "major", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
}
else rrdset_next(st_pgfaults);
rrddim_set_by_pointer(st_pgfaults, rd_minor, pgfault);
rrddim_set_by_pointer(st_pgfaults, rd_major, pgmajfault);
rrdset_done(st_pgfaults);
}
// --------------------------------------------------------------------
// Ondemand criteria for NUMA. Since this won't change at run time, we
// check it only once. We check whether the node count is >= 2 because
// single-node systems have uninteresting statistics (since all accesses
// are local).
if(unlikely(has_numa == -1))
has_numa = (numa_local || numa_foreign || numa_interleave || numa_other || numa_pte_updates ||
numa_huge_pte_updates || numa_hint_faults || numa_hint_faults_local || numa_pages_migrated) ? 1 : 0;
if(do_numa == CONFIG_BOOLEAN_YES || (do_numa == CONFIG_BOOLEAN_AUTO && has_numa)) {
do_numa = CONFIG_BOOLEAN_YES;
static RRDSET *st_numa = NULL;
static RRDDIM *rd_local = NULL, *rd_foreign = NULL, *rd_interleave = NULL, *rd_other = NULL, *rd_pte_updates = NULL, *rd_huge_pte_updates = NULL, *rd_hint_faults = NULL, *rd_hint_faults_local = NULL, *rd_pages_migrated = NULL;
if(unlikely(!st_numa)) {
st_numa = rrdset_create_localhost(
"mem"
, "numa"
, NULL
, "numa"
, NULL
, "NUMA events"
, "events/s"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_VMSTAT_NAME
, NETDATA_CHART_PRIO_MEM_NUMA
, update_every
, RRDSET_TYPE_LINE
);
rrdset_flag_set(st_numa, RRDSET_FLAG_DETAIL);
// These depend on CONFIG_NUMA in the kernel.
rd_local = rrddim_add(st_numa, "local", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_foreign = rrddim_add(st_numa, "foreign", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_interleave = rrddim_add(st_numa, "interleave", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_other = rrddim_add(st_numa, "other", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
// The following stats depend on CONFIG_NUMA_BALANCING in the
// kernel.
rd_pte_updates = rrddim_add(st_numa, "pte_updates", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_huge_pte_updates = rrddim_add(st_numa, "huge_pte_updates", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_hint_faults = rrddim_add(st_numa, "hint_faults", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_hint_faults_local = rrddim_add(st_numa, "hint_faults_local", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
rd_pages_migrated = rrddim_add(st_numa, "pages_migrated", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
}
else rrdset_next(st_numa);
rrddim_set_by_pointer(st_numa, rd_local, numa_local);
rrddim_set_by_pointer(st_numa, rd_foreign, numa_foreign);
rrddim_set_by_pointer(st_numa, rd_interleave, numa_interleave);
rrddim_set_by_pointer(st_numa, rd_other, numa_other);
rrddim_set_by_pointer(st_numa, rd_pte_updates, numa_pte_updates);
rrddim_set_by_pointer(st_numa, rd_huge_pte_updates, numa_huge_pte_updates);
rrddim_set_by_pointer(st_numa, rd_hint_faults, numa_hint_faults);
rrddim_set_by_pointer(st_numa, rd_hint_faults_local, numa_hint_faults_local);
rrddim_set_by_pointer(st_numa, rd_pages_migrated, numa_pages_migrated);
rrdset_done(st_numa);
}
return 0;
}
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