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proc_meminfo.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_proc.h"
#define PLUGIN_PROC_MODULE_MEMINFO_NAME "/proc/meminfo"
#define CONFIG_SECTION_PLUGIN_PROC_MEMINFO "plugin:" PLUGIN_PROC_CONFIG_NAME ":" PLUGIN_PROC_MODULE_MEMINFO_NAME
int do_proc_meminfo(int update_every, usec_t dt) {
(void)dt;
static procfile *ff = NULL;
static int do_ram = -1, do_swap = -1, do_hwcorrupt = -1, do_committed = -1, do_writeback = -1, do_kernel = -1, do_slab = -1, do_hugepages = -1, do_transparent_hugepages = -1;
static ARL_BASE *arl_base = NULL;
static ARL_ENTRY *arl_hwcorrupted = NULL, *arl_memavailable = NULL;
static unsigned long long
MemTotal = 0,
MemFree = 0,
MemAvailable = 0,
Buffers = 0,
Cached = 0,
//SwapCached = 0,
//Active = 0,
//Inactive = 0,
//ActiveAnon = 0,
//InactiveAnon = 0,
//ActiveFile = 0,
//InactiveFile = 0,
//Unevictable = 0,
//Mlocked = 0,
SwapTotal = 0,
SwapFree = 0,
Dirty = 0,
Writeback = 0,
//AnonPages = 0,
//Mapped = 0,
//Shmem = 0,
Slab = 0,
SReclaimable = 0,
SUnreclaim = 0,
KernelStack = 0,
PageTables = 0,
NFS_Unstable = 0,
Bounce = 0,
WritebackTmp = 0,
//CommitLimit = 0,
Committed_AS = 0,
//VmallocTotal = 0,
VmallocUsed = 0,
//VmallocChunk = 0,
AnonHugePages = 0,
ShmemHugePages = 0,
HugePages_Total = 0,
HugePages_Free = 0,
HugePages_Rsvd = 0,
HugePages_Surp = 0,
Hugepagesize = 0,
//DirectMap4k = 0,
//DirectMap2M = 0,
HardwareCorrupted = 0;
if(unlikely(!arl_base)) {
do_ram = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "system ram", 1);
do_swap = config_get_boolean_ondemand(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "system swap", CONFIG_BOOLEAN_AUTO);
do_hwcorrupt = config_get_boolean_ondemand(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "hardware corrupted ECC", CONFIG_BOOLEAN_AUTO);
do_committed = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "committed memory", 1);
do_writeback = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "writeback memory", 1);
do_kernel = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "kernel memory", 1);
do_slab = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "slab memory", 1);
do_hugepages = config_get_boolean_ondemand(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "hugepages", CONFIG_BOOLEAN_AUTO);
do_transparent_hugepages = config_get_boolean_ondemand(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "transparent hugepages", CONFIG_BOOLEAN_AUTO);
arl_base = arl_create("meminfo", NULL, 60);
arl_expect(arl_base, "MemTotal", &MemTotal);
arl_expect(arl_base, "MemFree", &MemFree);
arl_memavailable = arl_expect(arl_base, "MemAvailable", &MemAvailable);
arl_expect(arl_base, "Buffers", &Buffers);
arl_expect(arl_base, "Cached", &Cached);
//arl_expect(arl_base, "SwapCached", &SwapCached);
//arl_expect(arl_base, "Active", &Active);
//arl_expect(arl_base, "Inactive", &Inactive);
//arl_expect(arl_base, "ActiveAnon", &ActiveAnon);
//arl_expect(arl_base, "InactiveAnon", &InactiveAnon);
//arl_expect(arl_base, "ActiveFile", &ActiveFile);
//arl_expect(arl_base, "InactiveFile", &InactiveFile);
//arl_expect(arl_base, "Unevictable", &Unevictable);
//arl_expect(arl_base, "Mlocked", &Mlocked);
arl_expect(arl_base, "SwapTotal", &SwapTotal);
arl_expect(arl_base, "SwapFree", &SwapFree);
arl_expect(arl_base, "Dirty", &Dirty);
arl_expect(arl_base, "Writeback", &Writeback);
//arl_expect(arl_base, "AnonPages", &AnonPages);
//arl_expect(arl_base, "Mapped", &Mapped);
//arl_expect(arl_base, "Shmem", &Shmem);
arl_expect(arl_base, "Slab", &Slab);
arl_expect(arl_base, "SReclaimable", &SReclaimable);
arl_expect(arl_base, "SUnreclaim", &SUnreclaim);
arl_expect(arl_base, "KernelStack", &KernelStack);
arl_expect(arl_base, "PageTables", &PageTables);
arl_expect(arl_base, "NFS_Unstable", &NFS_Unstable);
arl_expect(arl_base, "Bounce", &Bounce);
arl_expect(arl_base, "WritebackTmp", &WritebackTmp);
//arl_expect(arl_base, "CommitLimit", &CommitLimit);
arl_expect(arl_base, "Committed_AS", &Committed_AS);
//arl_expect(arl_base, "VmallocTotal", &VmallocTotal);
arl_expect(arl_base, "VmallocUsed", &VmallocUsed);
//arl_expect(arl_base, "VmallocChunk", &VmallocChunk);
arl_hwcorrupted = arl_expect(arl_base, "HardwareCorrupted", &HardwareCorrupted);
arl_expect(arl_base, "AnonHugePages", &AnonHugePages);
arl_expect(arl_base, "ShmemHugePages", &ShmemHugePages);
arl_expect(arl_base, "HugePages_Total", &HugePages_Total);
arl_expect(arl_base, "HugePages_Free", &HugePages_Free);
arl_expect(arl_base, "HugePages_Rsvd", &HugePages_Rsvd);
arl_expect(arl_base, "HugePages_Surp", &HugePages_Surp);
arl_expect(arl_base, "Hugepagesize", &Hugepagesize);
//arl_expect(arl_base, "DirectMap4k", &DirectMap4k);
//arl_expect(arl_base, "DirectMap2M", &DirectMap2M);
}
if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/meminfo");
ff = procfile_open(config_get(CONFIG_SECTION_PLUGIN_PROC_MEMINFO, "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)) continue;
if(unlikely(arl_check(arl_base,
procfile_lineword(ff, l, 0),
procfile_lineword(ff, l, 1)))) break;
}
// --------------------------------------------------------------------
// http://stackoverflow.com/questions/3019748/how-to-reliably-measure-available-memory-in-linux
unsigned long long MemCached = Cached + SReclaimable;
unsigned long long MemUsed = MemTotal - MemFree - MemCached - Buffers;
if(do_ram) {
{
static RRDSET *st_system_ram = NULL;
static RRDDIM *rd_free = NULL, *rd_used = NULL, *rd_cached = NULL, *rd_buffers = NULL;
if(unlikely(!st_system_ram)) {
st_system_ram = rrdset_create_localhost(
"system"
, "ram"
, NULL
, "ram"
, NULL
, "System RAM"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_SYSTEM_RAM
, update_every
, RRDSET_TYPE_STACKED
);
rd_free = rrddim_add(st_system_ram, "free", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_used = rrddim_add(st_system_ram, "used", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_cached = rrddim_add(st_system_ram, "cached", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_buffers = rrddim_add(st_system_ram, "buffers", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_system_ram);
rrddim_set_by_pointer(st_system_ram, rd_free, MemFree);
rrddim_set_by_pointer(st_system_ram, rd_used, MemUsed);
rrddim_set_by_pointer(st_system_ram, rd_cached, MemCached);
rrddim_set_by_pointer(st_system_ram, rd_buffers, Buffers);
rrdset_done(st_system_ram);
}
if(arl_memavailable->flags & ARL_ENTRY_FLAG_FOUND) {
static RRDSET *st_mem_available = NULL;
static RRDDIM *rd_avail = NULL;
if(unlikely(!st_mem_available)) {
st_mem_available = rrdset_create_localhost(
"mem"
, "available"
, NULL
, "system"
, NULL
, "Available RAM for applications"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_SYSTEM_AVAILABLE
, update_every
, RRDSET_TYPE_AREA
);
rd_avail = rrddim_add(st_mem_available, "MemAvailable", "avail", 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_available);
rrddim_set_by_pointer(st_mem_available, rd_avail, MemAvailable);
rrdset_done(st_mem_available);
}
}
// --------------------------------------------------------------------
unsigned long long SwapUsed = SwapTotal - SwapFree;
if(do_swap == CONFIG_BOOLEAN_YES || (do_swap == CONFIG_BOOLEAN_AUTO &&
(SwapTotal || SwapUsed || SwapFree ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
do_swap = CONFIG_BOOLEAN_YES;
static RRDSET *st_system_swap = NULL;
static RRDDIM *rd_free = NULL, *rd_used = NULL;
if(unlikely(!st_system_swap)) {
st_system_swap = rrdset_create_localhost(
"system"
, "swap"
, NULL
, "swap"
, NULL
, "System Swap"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_SYSTEM_SWAP
, update_every
, RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_system_swap, RRDSET_FLAG_DETAIL);
rd_free = rrddim_add(st_system_swap, "free", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_used = rrddim_add(st_system_swap, "used", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_system_swap);
rrddim_set_by_pointer(st_system_swap, rd_used, SwapUsed);
rrddim_set_by_pointer(st_system_swap, rd_free, SwapFree);
rrdset_done(st_system_swap);
}
// --------------------------------------------------------------------
if(arl_hwcorrupted->flags & ARL_ENTRY_FLAG_FOUND &&
(do_hwcorrupt == CONFIG_BOOLEAN_YES || (do_hwcorrupt == CONFIG_BOOLEAN_AUTO &&
(HardwareCorrupted > 0 ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES)))) {
do_hwcorrupt = CONFIG_BOOLEAN_YES;
static RRDSET *st_mem_hwcorrupt = NULL;
static RRDDIM *rd_corrupted = NULL;
if(unlikely(!st_mem_hwcorrupt)) {
st_mem_hwcorrupt = rrdset_create_localhost(
"mem"
, "hwcorrupt"
, NULL
, "ecc"
, NULL
, "Corrupted Memory, detected by ECC"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_HW
, update_every
, RRDSET_TYPE_LINE
);
rrdset_flag_set(st_mem_hwcorrupt, RRDSET_FLAG_DETAIL);
rd_corrupted = rrddim_add(st_mem_hwcorrupt, "HardwareCorrupted", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_hwcorrupt);
rrddim_set_by_pointer(st_mem_hwcorrupt, rd_corrupted, HardwareCorrupted);
rrdset_done(st_mem_hwcorrupt);
}
// --------------------------------------------------------------------
if(do_committed) {
static RRDSET *st_mem_committed = NULL;
static RRDDIM *rd_committed = NULL;
if(unlikely(!st_mem_committed)) {
st_mem_committed = rrdset_create_localhost(
"mem"
, "committed"
, NULL
, "system"
, NULL
, "Committed (Allocated) Memory"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_SYSTEM_COMMITTED
, update_every
, RRDSET_TYPE_AREA
);
rrdset_flag_set(st_mem_committed, RRDSET_FLAG_DETAIL);
rd_committed = rrddim_add(st_mem_committed, "Committed_AS", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_committed);
rrddim_set_by_pointer(st_mem_committed, rd_committed, Committed_AS);
rrdset_done(st_mem_committed);
}
// --------------------------------------------------------------------
if(do_writeback) {
static RRDSET *st_mem_writeback = NULL;
static RRDDIM *rd_dirty = NULL, *rd_writeback = NULL, *rd_fusewriteback = NULL, *rd_nfs_writeback = NULL, *rd_bounce = NULL;
if(unlikely(!st_mem_writeback)) {
st_mem_writeback = rrdset_create_localhost(
"mem"
, "writeback"
, NULL
, "kernel"
, NULL
, "Writeback Memory"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_KERNEL
, update_every
, RRDSET_TYPE_LINE
);
rrdset_flag_set(st_mem_writeback, RRDSET_FLAG_DETAIL);
rd_dirty = rrddim_add(st_mem_writeback, "Dirty", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_writeback = rrddim_add(st_mem_writeback, "Writeback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_fusewriteback = rrddim_add(st_mem_writeback, "FuseWriteback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_nfs_writeback = rrddim_add(st_mem_writeback, "NfsWriteback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_bounce = rrddim_add(st_mem_writeback, "Bounce", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_writeback);
rrddim_set_by_pointer(st_mem_writeback, rd_dirty, Dirty);
rrddim_set_by_pointer(st_mem_writeback, rd_writeback, Writeback);
rrddim_set_by_pointer(st_mem_writeback, rd_fusewriteback, WritebackTmp);
rrddim_set_by_pointer(st_mem_writeback, rd_nfs_writeback, NFS_Unstable);
rrddim_set_by_pointer(st_mem_writeback, rd_bounce, Bounce);
rrdset_done(st_mem_writeback);
}
// --------------------------------------------------------------------
if(do_kernel) {
static RRDSET *st_mem_kernel = NULL;
static RRDDIM *rd_slab = NULL, *rd_kernelstack = NULL, *rd_pagetables = NULL, *rd_vmallocused = NULL;
if(unlikely(!st_mem_kernel)) {
st_mem_kernel = rrdset_create_localhost(
"mem"
, "kernel"
, NULL
, "kernel"
, NULL
, "Memory Used by Kernel"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_KERNEL + 1
, update_every
, RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_mem_kernel, RRDSET_FLAG_DETAIL);
rd_slab = rrddim_add(st_mem_kernel, "Slab", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_kernelstack = rrddim_add(st_mem_kernel, "KernelStack", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_pagetables = rrddim_add(st_mem_kernel, "PageTables", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_vmallocused = rrddim_add(st_mem_kernel, "VmallocUsed", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_kernel);
rrddim_set_by_pointer(st_mem_kernel, rd_slab, Slab);
rrddim_set_by_pointer(st_mem_kernel, rd_kernelstack, KernelStack);
rrddim_set_by_pointer(st_mem_kernel, rd_pagetables, PageTables);
rrddim_set_by_pointer(st_mem_kernel, rd_vmallocused, VmallocUsed);
rrdset_done(st_mem_kernel);
}
// --------------------------------------------------------------------
if(do_slab) {
static RRDSET *st_mem_slab = NULL;
static RRDDIM *rd_reclaimable = NULL, *rd_unreclaimable = NULL;
if(unlikely(!st_mem_slab)) {
st_mem_slab = rrdset_create_localhost(
"mem"
, "slab"
, NULL
, "slab"
, NULL
, "Reclaimable Kernel Memory"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_SLAB
, update_every
, RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_mem_slab, RRDSET_FLAG_DETAIL);
rd_reclaimable = rrddim_add(st_mem_slab, "reclaimable", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_unreclaimable = rrddim_add(st_mem_slab, "unreclaimable", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_slab);
rrddim_set_by_pointer(st_mem_slab, rd_reclaimable, SReclaimable);
rrddim_set_by_pointer(st_mem_slab, rd_unreclaimable, SUnreclaim);
rrdset_done(st_mem_slab);
}
// --------------------------------------------------------------------
if(do_hugepages == CONFIG_BOOLEAN_YES || (do_hugepages == CONFIG_BOOLEAN_AUTO &&
((Hugepagesize && HugePages_Total) ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
do_hugepages = CONFIG_BOOLEAN_YES;
static RRDSET *st_mem_hugepages = NULL;
static RRDDIM *rd_used = NULL, *rd_free = NULL, *rd_rsvd = NULL, *rd_surp = NULL;
if(unlikely(!st_mem_hugepages)) {
st_mem_hugepages = rrdset_create_localhost(
"mem"
, "hugepages"
, NULL
, "hugepages"
, NULL
, "Dedicated HugePages Memory"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_HUGEPAGES + 1
, update_every
, RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_mem_hugepages, RRDSET_FLAG_DETAIL);
rd_free = rrddim_add(st_mem_hugepages, "free", NULL, Hugepagesize, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_used = rrddim_add(st_mem_hugepages, "used", NULL, Hugepagesize, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_surp = rrddim_add(st_mem_hugepages, "surplus", NULL, Hugepagesize, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_rsvd = rrddim_add(st_mem_hugepages, "reserved", NULL, Hugepagesize, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_hugepages);
rrddim_set_by_pointer(st_mem_hugepages, rd_used, HugePages_Total - HugePages_Free - HugePages_Rsvd);
rrddim_set_by_pointer(st_mem_hugepages, rd_free, HugePages_Free);
rrddim_set_by_pointer(st_mem_hugepages, rd_rsvd, HugePages_Rsvd);
rrddim_set_by_pointer(st_mem_hugepages, rd_surp, HugePages_Surp);
rrdset_done(st_mem_hugepages);
}
// --------------------------------------------------------------------
if(do_transparent_hugepages == CONFIG_BOOLEAN_YES || (do_transparent_hugepages == CONFIG_BOOLEAN_AUTO &&
(AnonHugePages ||
ShmemHugePages ||
netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
do_transparent_hugepages = CONFIG_BOOLEAN_YES;
static RRDSET *st_mem_transparent_hugepages = NULL;
static RRDDIM *rd_anonymous = NULL, *rd_shared = NULL;
if(unlikely(!st_mem_transparent_hugepages)) {
st_mem_transparent_hugepages = rrdset_create_localhost(
"mem"
, "transparent_hugepages"
, NULL
, "hugepages"
, NULL
, "Transparent HugePages Memory"
, "MiB"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_MEMINFO_NAME
, NETDATA_CHART_PRIO_MEM_HUGEPAGES
, update_every
, RRDSET_TYPE_STACKED
);
rrdset_flag_set(st_mem_transparent_hugepages, RRDSET_FLAG_DETAIL);
rd_anonymous = rrddim_add(st_mem_transparent_hugepages, "anonymous", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
rd_shared = rrddim_add(st_mem_transparent_hugepages, "shmem", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(st_mem_transparent_hugepages);
rrddim_set_by_pointer(st_mem_transparent_hugepages, rd_anonymous, AnonHugePages);
rrddim_set_by_pointer(st_mem_transparent_hugepages, rd_shared, ShmemHugePages);
rrdset_done(st_mem_transparent_hugepages);
}
return 0;
}