src/proc_meminfo.c

   1 #include <inttypes.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "common.h"
   7 #include "log.h"
   8 #include "config.h"
   9 #include "procfile.h"
  10 #include "rrd.h"
  11 #include "plugin_proc.h"
  12
  13 #define MAX_PROC_MEMINFO_LINE 4096
  14 #define MAX_PROC_MEMINFO_NAME 1024
  15
  16 int do_proc_meminfo(int update_every, unsigned long long dt) {
  17         static procfile *ff = NULL;
  18
  19         static int do_ram = -1, do_swap = -1, do_hwcorrupt = -1, do_committed = -1, do_writeback = -1, do_kernel = -1, do_slab = -1;
  20
  21         if(do_ram == -1)                do_ram                  = config_get_boolean("plugin:proc:/proc/meminfo", "system ram", 1);
  22         if(do_swap == -1)               do_swap                 = config_get_boolean("plugin:proc:/proc/meminfo", "system swap", 1);
  23         if(do_hwcorrupt == -1)  do_hwcorrupt    = config_get_boolean("plugin:proc:/proc/meminfo", "hardware corrupted ECC", 1);
  24         if(do_committed == -1)  do_committed    = config_get_boolean("plugin:proc:/proc/meminfo", "committed memory", 1);
  25         if(do_writeback == -1)  do_writeback    = config_get_boolean("plugin:proc:/proc/meminfo", "writeback memory", 1);
  26         if(do_kernel == -1)             do_kernel               = config_get_boolean("plugin:proc:/proc/meminfo", "kernel memory", 1);
  27         if(do_slab == -1)               do_slab                 = config_get_boolean("plugin:proc:/proc/meminfo", "slab memory", 1);
  28
  29         if(dt) {};
  30
  31         if(!ff) {
  32                 char filename[FILENAME_MAX + 1];
  33                 snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/meminfo");
  34                 ff = procfile_open(config_get("plugin:proc:/proc/meminfo", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
  35         }
  36         if(!ff) return 1;
  37
  38         ff = procfile_readall(ff);
  39         if(!ff) return 0; // we return 0, so that we will retry to open it next time
  40
  41         uint32_t lines = procfile_lines(ff), l;
  42         uint32_t words;
  43
  44         int hwcorrupted = 0;
  45
  46         unsigned long long MemTotal = 0, MemFree = 0, Buffers = 0, Cached = 0, SwapCached = 0,
  47                 Active = 0, Inactive = 0, ActiveAnon = 0, InactiveAnon = 0, ActiveFile = 0, InactiveFile = 0,
  48                 Unevictable = 0, Mlocked = 0, SwapTotal = 0, SwapFree = 0, Dirty = 0, Writeback = 0, AnonPages = 0,
  49                 Mapped = 0, Shmem = 0, Slab = 0, SReclaimable = 0, SUnreclaim = 0, KernelStack = 0, PageTables = 0,
  50                 NFS_Unstable = 0, Bounce = 0, WritebackTmp = 0, CommitLimit = 0, Committed_AS = 0,
  51                 VmallocTotal = 0, VmallocUsed = 0, VmallocChunk = 0,
  52                 AnonHugePages = 0, HugePages_Total = 0, HugePages_Free = 0, HugePages_Rsvd = 0, HugePages_Surp = 0, Hugepagesize = 0,
  53                 DirectMap4k = 0, DirectMap2M = 0, HardwareCorrupted = 0;
  54
  55         for(l = 0; l < lines ;l++) {
  56                 words = procfile_linewords(ff, l);
  57                 if(words < 2) continue;
  58
  59                 char *name = procfile_lineword(ff, l, 0);
  60                 unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
  61
  62                      if(!MemTotal && strcmp(name, "MemTotal") == 0) MemTotal = value;
  63                 else if(!MemFree && strcmp(name, "MemFree") == 0) MemFree = value;
  64                 else if(!Buffers && strcmp(name, "Buffers") == 0) Buffers = value;
  65                 else if(!Cached && strcmp(name, "Cached") == 0) Cached = value;
  66                 else if(!SwapCached && strcmp(name, "SwapCached") == 0) SwapCached = value;
  67                 else if(!Active && strcmp(name, "Active") == 0) Active = value;
  68                 else if(!Inactive && strcmp(name, "Inactive") == 0) Inactive = value;
  69                 else if(!ActiveAnon && strcmp(name, "ActiveAnon") == 0) ActiveAnon = value;
  70                 else if(!InactiveAnon && strcmp(name, "InactiveAnon") == 0) InactiveAnon = value;
  71                 else if(!ActiveFile && strcmp(name, "ActiveFile") == 0) ActiveFile = value;
  72                 else if(!InactiveFile && strcmp(name, "InactiveFile") == 0) InactiveFile = value;
  73                 else if(!Unevictable && strcmp(name, "Unevictable") == 0) Unevictable = value;
  74                 else if(!Mlocked && strcmp(name, "Mlocked") == 0) Mlocked = value;
  75                 else if(!SwapTotal && strcmp(name, "SwapTotal") == 0) SwapTotal = value;
  76                 else if(!SwapFree && strcmp(name, "SwapFree") == 0) SwapFree = value;
  77                 else if(!Dirty && strcmp(name, "Dirty") == 0) Dirty = value;
  78                 else if(!Writeback && strcmp(name, "Writeback") == 0) Writeback = value;
  79                 else if(!AnonPages && strcmp(name, "AnonPages") == 0) AnonPages = value;
  80                 else if(!Mapped && strcmp(name, "Mapped") == 0) Mapped = value;
  81                 else if(!Shmem && strcmp(name, "Shmem") == 0) Shmem = value;
  82                 else if(!Slab && strcmp(name, "Slab") == 0) Slab = value;
  83                 else if(!SReclaimable && strcmp(name, "SReclaimable") == 0) SReclaimable = value;
  84                 else if(!SUnreclaim && strcmp(name, "SUnreclaim") == 0) SUnreclaim = value;
  85                 else if(!KernelStack && strcmp(name, "KernelStack") == 0) KernelStack = value;
  86                 else if(!PageTables && strcmp(name, "PageTables") == 0) PageTables = value;
  87                 else if(!NFS_Unstable && strcmp(name, "NFS_Unstable") == 0) NFS_Unstable = value;
  88                 else if(!Bounce && strcmp(name, "Bounce") == 0) Bounce = value;
  89                 else if(!WritebackTmp && strcmp(name, "WritebackTmp") == 0) WritebackTmp = value;
  90                 else if(!CommitLimit && strcmp(name, "CommitLimit") == 0) CommitLimit = value;
  91                 else if(!Committed_AS && strcmp(name, "Committed_AS") == 0) Committed_AS = value;
  92                 else if(!VmallocTotal && strcmp(name, "VmallocTotal") == 0) VmallocTotal = value;
  93                 else if(!VmallocUsed && strcmp(name, "VmallocUsed") == 0) VmallocUsed = value;
  94                 else if(!VmallocChunk && strcmp(name, "VmallocChunk") == 0) VmallocChunk = value;
  95                 else if(!HardwareCorrupted && strcmp(name, "HardwareCorrupted") == 0) { HardwareCorrupted = value; hwcorrupted = 1; }
  96                 else if(!AnonHugePages && strcmp(name, "AnonHugePages") == 0) AnonHugePages = value;
  97                 else if(!HugePages_Total && strcmp(name, "HugePages_Total") == 0) HugePages_Total = value;
  98                 else if(!HugePages_Free && strcmp(name, "HugePages_Free") == 0) HugePages_Free = value;
  99                 else if(!HugePages_Rsvd && strcmp(name, "HugePages_Rsvd") == 0) HugePages_Rsvd = value;
 100                 else if(!HugePages_Surp && strcmp(name, "HugePages_Surp") == 0) HugePages_Surp = value;
 101                 else if(!Hugepagesize && strcmp(name, "Hugepagesize") == 0) Hugepagesize = value;
 102                 else if(!DirectMap4k && strcmp(name, "DirectMap4k") == 0) DirectMap4k = value;
 103                 else if(!DirectMap2M && strcmp(name, "DirectMap2M") == 0) DirectMap2M = value;
 104         }
 105
 106         RRDSET *st;
 107
 108         // --------------------------------------------------------------------
 109
 110         // http://stackoverflow.com/questions/3019748/how-to-reliably-measure-available-memory-in-linux
 111         unsigned long long MemUsed = MemTotal - MemFree - Cached - Buffers;
 112
 113         if(do_ram) {
 114                 st = rrdset_find("system.ram");
 115                 if(!st) {
 116                         st = rrdset_create("system", "ram", NULL, "mem", "System RAM", "MB", 200, update_every, RRDSET_TYPE_STACKED);
 117
 118                         rrddim_add(st, "buffers", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 119                         rrddim_add(st, "used",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
 120                         rrddim_add(st, "cached",  NULL, 1, 1024, RRDDIM_ABSOLUTE);
 121                         rrddim_add(st, "free",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
 122                 }
 123                 else rrdset_next(st);
 124
 125                 rrddim_set(st, "used", MemUsed);
 126                 rrddim_set(st, "free", MemFree);
 127                 rrddim_set(st, "cached", Cached);
 128                 rrddim_set(st, "buffers", Buffers);
 129                 rrdset_done(st);
 130         }
 131
 132         // --------------------------------------------------------------------
 133
 134         unsigned long long SwapUsed = SwapTotal - SwapFree;
 135
 136         if(do_swap) {
 137                 st = rrdset_find("system.swap");
 138                 if(!st) {
 139                         st = rrdset_create("system", "swap", NULL, "mem", "System Swap", "MB", 201, update_every, RRDSET_TYPE_STACKED);
 140                         st->isdetail = 1;
 141
 142                         rrddim_add(st, "free",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
 143                         rrddim_add(st, "used",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
 144                 }
 145                 else rrdset_next(st);
 146
 147                 rrddim_set(st, "used", SwapUsed);
 148                 rrddim_set(st, "free", SwapFree);
 149                 rrdset_done(st);
 150         }
 151
 152         // --------------------------------------------------------------------
 153
 154         if(hwcorrupted && do_hwcorrupt) {
 155                 st = rrdset_find("mem.hwcorrupt");
 156                 if(!st) {
 157                         st = rrdset_create("mem", "hwcorrupt", NULL, "mem", "Hardware Corrupted ECC", "MB", 9000, update_every, RRDSET_TYPE_LINE);
 158                         st->isdetail = 1;
 159
 160                         rrddim_add(st, "HardwareCorrupted", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 161                 }
 162                 else rrdset_next(st);
 163
 164                 rrddim_set(st, "HardwareCorrupted", HardwareCorrupted);
 165                 rrdset_done(st);
 166         }
 167
 168         // --------------------------------------------------------------------
 169
 170         if(do_committed) {
 171                 st = rrdset_find("mem.committed");
 172                 if(!st) {
 173                         st = rrdset_create("mem", "committed", NULL, "mem", "Committed (Allocated) Memory", "MB", 5000, update_every, RRDSET_TYPE_AREA);
 174                         st->isdetail = 1;
 175
 176                         rrddim_add(st, "Committed_AS", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 177                 }
 178                 else rrdset_next(st);
 179
 180                 rrddim_set(st, "Committed_AS", Committed_AS);
 181                 rrdset_done(st);
 182         }
 183
 184         // --------------------------------------------------------------------
 185
 186         if(do_writeback) {
 187                 st = rrdset_find("mem.writeback");
 188                 if(!st) {
 189                         st = rrdset_create("mem", "writeback", NULL, "mem", "Writeback Memory", "MB", 4000, update_every, RRDSET_TYPE_LINE);
 190                         st->isdetail = 1;
 191
 192                         rrddim_add(st, "Dirty", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 193                         rrddim_add(st, "Writeback", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 194                         rrddim_add(st, "FuseWriteback", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 195                         rrddim_add(st, "NfsWriteback", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 196                         rrddim_add(st, "Bounce", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 197                 }
 198                 else rrdset_next(st);
 199
 200                 rrddim_set(st, "Dirty", Dirty);
 201                 rrddim_set(st, "Writeback", Writeback);
 202                 rrddim_set(st, "FuseWriteback", WritebackTmp);
 203                 rrddim_set(st, "NfsWriteback", NFS_Unstable);
 204                 rrddim_set(st, "Bounce", Bounce);
 205                 rrdset_done(st);
 206         }
 207
 208         // --------------------------------------------------------------------
 209
 210         if(do_kernel) {
 211                 st = rrdset_find("mem.kernel");
 212                 if(!st) {
 213                         st = rrdset_create("mem", "kernel", NULL, "mem", "Memory Used by Kernel", "MB", 6000, update_every, RRDSET_TYPE_STACKED);
 214                         st->isdetail = 1;
 215
 216                         rrddim_add(st, "Slab", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 217                         rrddim_add(st, "KernelStack", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 218                         rrddim_add(st, "PageTables", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 219                         rrddim_add(st, "VmallocUsed", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 220                 }
 221                 else rrdset_next(st);
 222
 223                 rrddim_set(st, "KernelStack", KernelStack);
 224                 rrddim_set(st, "Slab", Slab);
 225                 rrddim_set(st, "PageTables", PageTables);
 226                 rrddim_set(st, "VmallocUsed", VmallocUsed);
 227                 rrdset_done(st);
 228         }
 229
 230         // --------------------------------------------------------------------
 231
 232         if(do_slab) {
 233                 st = rrdset_find("mem.slab");
 234                 if(!st) {
 235                         st = rrdset_create("mem", "slab", NULL, "mem", "Reclaimable Kernel Memory", "MB", 6500, update_every, RRDSET_TYPE_STACKED);
 236                         st->isdetail = 1;
 237
 238                         rrddim_add(st, "reclaimable", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 239                         rrddim_add(st, "unreclaimable", NULL, 1, 1024, RRDDIM_ABSOLUTE);
 240                 }
 241                 else rrdset_next(st);
 242
 243                 rrddim_set(st, "reclaimable", SReclaimable);
 244                 rrddim_set(st, "unreclaimable", SUnreclaim);
 245                 rrdset_done(st);
 246         }
 247
 248         return 0;
 249 }
 250