src/proc_meminfo.c

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