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-rwxr-xr-xsrc/proc_diskstats.c470
1 files changed, 470 insertions, 0 deletions
diff --git a/src/proc_diskstats.c b/src/proc_diskstats.c
new file mode 100755
index 000000000..f404118fa
--- /dev/null
+++ b/src/proc_diskstats.c
@@ -0,0 +1,470 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+#include "log.h"
+#include "appconfig.h"
+#include "procfile.h"
+#include "rrd.h"
+#include "plugin_proc.h"
+
+#define RRD_TYPE_DISK "disk"
+
+int do_proc_diskstats(int update_every, unsigned long long dt) {
+ static procfile *ff = NULL;
+ static char path_to_get_hw_sector_size[FILENAME_MAX + 1] = "";
+ static int enable_new_disks = -1;
+ static int do_io = -1, do_ops = -1, do_mops = -1, do_iotime = -1, do_qops = -1, do_util = -1, do_backlog = -1;
+
+ if(enable_new_disks == -1) enable_new_disks = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "enable new disks detected at runtime", CONFIG_ONDEMAND_ONDEMAND);
+
+ if(do_io == -1) do_io = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "bandwidth for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_ops == -1) do_ops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_mops == -1) do_mops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "merged operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_iotime == -1) do_iotime = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "i/o time for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_qops == -1) do_qops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "queued operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_util == -1) do_util = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "utilization percentage for all disks", CONFIG_ONDEMAND_ONDEMAND);
+ if(do_backlog == -1)do_backlog = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "backlog for all disks", CONFIG_ONDEMAND_ONDEMAND);
+
+ if(!ff) {
+ char filename[FILENAME_MAX + 1];
+ snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/diskstats");
+ ff = procfile_open(config_get("plugin:proc:/proc/diskstats", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+ }
+ if(!ff) return 1;
+
+ if(!path_to_get_hw_sector_size[0]) {
+ char filename[FILENAME_MAX + 1];
+ snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/block/%s/queue/hw_sector_size");
+ snprintf(path_to_get_hw_sector_size, FILENAME_MAX, "%s%s", global_host_prefix, config_get("plugin:proc:/proc/diskstats", "path to get h/w sector size", filename));
+ }
+
+ ff = procfile_readall(ff);
+ if(!ff) return 0; // we return 0, so that we will retry to open it next time
+
+ uint32_t lines = procfile_lines(ff), l;
+ uint32_t words;
+
+ for(l = 0; l < lines ;l++) {
+ char *disk;
+ unsigned long long major = 0, minor = 0,
+ reads = 0, mreads = 0, readsectors = 0, readms = 0,
+ writes = 0, mwrites = 0, writesectors = 0, writems = 0,
+ queued_ios = 0, busy_ms = 0, backlog_ms = 0;
+
+ unsigned long long last_reads = 0, last_readsectors = 0, last_readms = 0,
+ last_writes = 0, last_writesectors = 0, last_writems = 0,
+ last_busy_ms = 0;
+
+ words = procfile_linewords(ff, l);
+ if(words < 14) continue;
+
+ major = strtoull(procfile_lineword(ff, l, 0), NULL, 10);
+ minor = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
+ disk = procfile_lineword(ff, l, 2);
+
+ // # of reads completed # of writes completed
+ // This is the total number of reads or writes completed successfully.
+ reads = strtoull(procfile_lineword(ff, l, 3), NULL, 10); // rd_ios
+ writes = strtoull(procfile_lineword(ff, l, 7), NULL, 10); // wr_ios
+
+ // # of reads merged # of writes merged
+ // Reads and writes which are adjacent to each other may be merged for
+ // efficiency. Thus two 4K reads may become one 8K read before it is
+ // ultimately handed to the disk, and so it will be counted (and queued)
+ mreads = strtoull(procfile_lineword(ff, l, 4), NULL, 10); // rd_merges_or_rd_sec
+ mwrites = strtoull(procfile_lineword(ff, l, 8), NULL, 10); // wr_merges
+
+ // # of sectors read # of sectors written
+ // This is the total number of sectors read or written successfully.
+ readsectors = strtoull(procfile_lineword(ff, l, 5), NULL, 10); // rd_sec_or_wr_ios
+ writesectors = strtoull(procfile_lineword(ff, l, 9), NULL, 10); // wr_sec
+
+ // # of milliseconds spent reading # of milliseconds spent writing
+ // This is the total number of milliseconds spent by all reads or writes (as
+ // measured from __make_request() to end_that_request_last()).
+ readms = strtoull(procfile_lineword(ff, l, 6), NULL, 10); // rd_ticks_or_wr_sec
+ writems = strtoull(procfile_lineword(ff, l, 10), NULL, 10); // wr_ticks
+
+ // # of I/Os currently in progress
+ // The only field that should go to zero. Incremented as requests are
+ // given to appropriate struct request_queue and decremented as they finish.
+ queued_ios = strtoull(procfile_lineword(ff, l, 11), NULL, 10); // ios_pgr
+
+ // # of milliseconds spent doing I/Os
+ // This field increases so long as field queued_ios is nonzero.
+ busy_ms = strtoull(procfile_lineword(ff, l, 12), NULL, 10); // tot_ticks
+
+ // weighted # of milliseconds spent doing I/Os
+ // This field is incremented at each I/O start, I/O completion, I/O
+ // merge, or read of these stats by the number of I/Os in progress
+ // (field queued_ios) times the number of milliseconds spent doing I/O since the
+ // last update of this field. This can provide an easy measure of both
+ // I/O completion time and the backlog that may be accumulating.
+ backlog_ms = strtoull(procfile_lineword(ff, l, 13), NULL, 10); // rq_ticks
+
+
+ int def_enabled = 0;
+
+ // remove slashes from disk names
+ char *s;
+ for(s = disk; *s ;s++) if(*s == '/') *s = '_';
+
+ switch(major) {
+ case 9: // MDs
+ case 43: // network block
+ case 144: // nfs
+ case 145: // nfs
+ case 146: // nfs
+ case 199: // veritas
+ case 201: // veritas
+ case 251: // dm
+ def_enabled = enable_new_disks;
+ break;
+
+ case 48: // RAID
+ case 49: // RAID
+ case 50: // RAID
+ case 51: // RAID
+ case 52: // RAID
+ case 53: // RAID
+ case 54: // RAID
+ case 55: // RAID
+ case 112: // RAID
+ case 136: // RAID
+ case 137: // RAID
+ case 138: // RAID
+ case 139: // RAID
+ case 140: // RAID
+ case 141: // RAID
+ case 142: // RAID
+ case 143: // RAID
+ case 179: // MMC
+ case 180: // USB
+ if(minor % 8) def_enabled = 0; // partitions
+ else def_enabled = enable_new_disks;
+ break;
+
+ case 8: // scsi disks
+ case 65: // scsi disks
+ case 66: // scsi disks
+ case 67: // scsi disks
+ case 68: // scsi disks
+ case 69: // scsi disks
+ case 70: // scsi disks
+ case 71: // scsi disks
+ case 72: // scsi disks
+ case 73: // scsi disks
+ case 74: // scsi disks
+ case 75: // scsi disks
+ case 76: // scsi disks
+ case 77: // scsi disks
+ case 78: // scsi disks
+ case 79: // scsi disks
+ case 80: // i2o
+ case 81: // i2o
+ case 82: // i2o
+ case 83: // i2o
+ case 84: // i2o
+ case 85: // i2o
+ case 86: // i2o
+ case 87: // i2o
+ case 101: // hyperdisk
+ case 102: // compressed
+ case 104: // scsi
+ case 105: // scsi
+ case 106: // scsi
+ case 107: // scsi
+ case 108: // scsi
+ case 109: // scsi
+ case 110: // scsi
+ case 111: // scsi
+ case 114: // bios raid
+ case 116: // ram board
+ case 128: // scsi
+ case 129: // scsi
+ case 130: // scsi
+ case 131: // scsi
+ case 132: // scsi
+ case 133: // scsi
+ case 134: // scsi
+ case 135: // scsi
+ case 153: // raid
+ case 202: // xen
+ case 256: // flash
+ case 257: // flash
+ if(minor % 16) def_enabled = 0; // partitions
+ else def_enabled = enable_new_disks;
+ break;
+
+ case 160: // raid
+ case 161: // raid
+ if(minor % 32) def_enabled = 0; // partitions
+ else def_enabled = enable_new_disks;
+ break;
+
+ case 3: // ide
+ case 13: // 8bit ide
+ case 22: // ide
+ case 33: // ide
+ case 34: // ide
+ case 56: // ide
+ case 57: // ide
+ case 88: // ide
+ case 89: // ide
+ case 90: // ide
+ case 91: // ide
+ if(minor % 64) def_enabled = 0; // partitions
+ else def_enabled = enable_new_disks;
+ break;
+
+ case 252: // zram
+ def_enabled = 0;
+ break;
+
+ default:
+ def_enabled = 0;
+ break;
+ }
+
+ int ddo_io = do_io, ddo_ops = do_ops, ddo_mops = do_mops, ddo_iotime = do_iotime, ddo_qops = do_qops, ddo_util = do_util, ddo_backlog = do_backlog;
+
+ // check which charts are enabled for this disk
+ {
+ char var_name[4096 + 1];
+ snprintf(var_name, 4096, "plugin:proc:/proc/diskstats:%s", disk);
+ def_enabled = config_get_boolean_ondemand(var_name, "enabled", def_enabled);
+ if(def_enabled == CONFIG_ONDEMAND_NO) continue;
+ if(def_enabled == CONFIG_ONDEMAND_ONDEMAND && !reads && !writes) continue;
+
+
+ ddo_io = config_get_boolean_ondemand(var_name, "bandwidth", ddo_io);
+ ddo_ops = config_get_boolean_ondemand(var_name, "operations", ddo_ops);
+ ddo_mops = config_get_boolean_ondemand(var_name, "merged operations", ddo_mops);
+ ddo_iotime = config_get_boolean_ondemand(var_name, "i/o time", ddo_iotime);
+ ddo_qops = config_get_boolean_ondemand(var_name, "queued operations", ddo_qops);
+ ddo_util = config_get_boolean_ondemand(var_name, "utilization percentage", ddo_util);
+ ddo_backlog = config_get_boolean_ondemand(var_name, "backlog", ddo_backlog);
+
+ // by default, do not add charts that do not have values
+ if(ddo_io == CONFIG_ONDEMAND_ONDEMAND && !reads && !writes) ddo_io = 0;
+ if(ddo_mops == CONFIG_ONDEMAND_ONDEMAND && mreads == 0 && mwrites == 0) ddo_mops = 0;
+ if(ddo_iotime == CONFIG_ONDEMAND_ONDEMAND && readms == 0 && writems == 0) ddo_iotime = 0;
+ if(ddo_util == CONFIG_ONDEMAND_ONDEMAND && busy_ms == 0) ddo_util = 0;
+ if(ddo_backlog == CONFIG_ONDEMAND_ONDEMAND && backlog_ms == 0) ddo_backlog = 0;
+ if(ddo_qops == CONFIG_ONDEMAND_ONDEMAND && backlog_ms == 0) ddo_qops = 0;
+
+ // for absolute values, we need to switch the setting to 'yes'
+ // to allow it refresh from now on
+ if(ddo_qops == CONFIG_ONDEMAND_ONDEMAND) config_set(var_name, "queued operations", "yes");
+ }
+
+ RRDSET *st;
+
+ // --------------------------------------------------------------------
+
+ int sector_size = 512;
+ if(ddo_io) {
+ st = rrdset_find_bytype(RRD_TYPE_DISK, disk);
+ if(!st) {
+ char tf[FILENAME_MAX + 1], *t;
+ char ssfilename[FILENAME_MAX + 1];
+
+ strncpy(tf, disk, FILENAME_MAX);
+ tf[FILENAME_MAX] = '\0';
+
+ // replace all / with !
+ while((t = strchr(tf, '/'))) *t = '!';
+
+ snprintf(ssfilename, FILENAME_MAX, path_to_get_hw_sector_size, tf);
+ FILE *fpss = fopen(ssfilename, "r");
+ if(fpss) {
+ char ssbuffer[1025];
+ char *tmp = fgets(ssbuffer, 1024, fpss);
+
+ if(tmp) {
+ sector_size = atoi(tmp);
+ if(sector_size <= 0) {
+ error("Invalid sector size %d for device %s in %s. Assuming 512.", sector_size, disk, ssfilename);
+ sector_size = 512;
+ }
+ }
+ else error("Cannot read data for sector size for device %s from %s. Assuming 512.", disk, ssfilename);
+
+ fclose(fpss);
+ }
+ else error("Cannot read sector size for device %s from %s. Assuming 512.", disk, ssfilename);
+
+ st = rrdset_create(RRD_TYPE_DISK, disk, NULL, disk, "disk.io", "Disk I/O Bandwidth", "kilobytes/s", 2000, update_every, RRDSET_TYPE_AREA);
+
+ rrddim_add(st, "reads", NULL, sector_size, 1024, RRDDIM_INCREMENTAL);
+ rrddim_add(st, "writes", NULL, sector_size * -1, 1024, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ last_readsectors = rrddim_set(st, "reads", readsectors);
+ last_writesectors = rrddim_set(st, "writes", writesectors);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_ops) {
+ st = rrdset_find_bytype("disk_ops", disk);
+ if(!st) {
+ st = rrdset_create("disk_ops", disk, NULL, disk, "disk.ops", "Disk Completed I/O Operations", "operations/s", 2001, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
+ rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ last_reads = rrddim_set(st, "reads", reads);
+ last_writes = rrddim_set(st, "writes", writes);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_qops) {
+ st = rrdset_find_bytype("disk_qops", disk);
+ if(!st) {
+ st = rrdset_create("disk_qops", disk, NULL, disk, "disk.qops", "Disk Current I/O Operations", "operations", 2002, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "operations", NULL, 1, 1, RRDDIM_ABSOLUTE);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "operations", queued_ios);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_backlog) {
+ st = rrdset_find_bytype("disk_backlog", disk);
+ if(!st) {
+ st = rrdset_create("disk_backlog", disk, NULL, disk, "disk.backlog", "Disk Backlog", "backlog (ms)", 2003, update_every, RRDSET_TYPE_AREA);
+ st->isdetail = 1;
+
+ rrddim_add(st, "backlog", NULL, 1, 10, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "backlog", backlog_ms);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_util) {
+ st = rrdset_find_bytype("disk_util", disk);
+ if(!st) {
+ st = rrdset_create("disk_util", disk, NULL, disk, "disk.util", "Disk Utilization Time", "% of time working", 2004, update_every, RRDSET_TYPE_AREA);
+ st->isdetail = 1;
+
+ rrddim_add(st, "utilization", NULL, 1, 10, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ last_busy_ms = rrddim_set(st, "utilization", busy_ms);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_mops) {
+ st = rrdset_find_bytype("disk_mops", disk);
+ if(!st) {
+ st = rrdset_create("disk_mops", disk, NULL, disk, "disk.mops", "Disk Merged Operations", "merged operations/s", 2021, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
+ rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "reads", mreads);
+ rrddim_set(st, "writes", mwrites);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+
+ if(ddo_iotime) {
+ st = rrdset_find_bytype("disk_iotime", disk);
+ if(!st) {
+ st = rrdset_create("disk_iotime", disk, NULL, disk, "disk.iotime", "Disk Total I/O Time", "milliseconds/s", 2022, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
+ rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
+ }
+ else rrdset_next_usec(st, dt);
+
+ last_readms = rrddim_set(st, "reads", readms);
+ last_writems = rrddim_set(st, "writes", writems);
+ rrdset_done(st);
+ }
+
+ // --------------------------------------------------------------------
+ // calculate differential charts
+ // only if this is not the first time we run
+
+ if(dt) {
+ if(ddo_iotime && ddo_ops) {
+ st = rrdset_find_bytype("disk_await", disk);
+ if(!st) {
+ st = rrdset_create("disk_await", disk, NULL, disk, "disk.await", "Average Completed I/O Operation Time", "ms per operation", 2005, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_ABSOLUTE);
+ rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_ABSOLUTE);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "reads", (reads - last_reads) ? (readms - last_readms) / (reads - last_reads) : 0);
+ rrddim_set(st, "writes", (writes - last_writes) ? (writems - last_writems) / (writes - last_writes) : 0);
+ rrdset_done(st);
+ }
+
+ if(ddo_io && ddo_ops) {
+ st = rrdset_find_bytype("disk_avgsz", disk);
+ if(!st) {
+ st = rrdset_create("disk_avgsz", disk, NULL, disk, "disk.avgsz", "Average Completed I/O Operation Bandwidth", "kilobytes per operation", 2006, update_every, RRDSET_TYPE_AREA);
+ st->isdetail = 1;
+
+ rrddim_add(st, "reads", NULL, sector_size, 1024, RRDDIM_ABSOLUTE);
+ rrddim_add(st, "writes", NULL, -sector_size, 1024, RRDDIM_ABSOLUTE);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "reads", (reads - last_reads) ? (readsectors - last_readsectors) / (reads - last_reads) : 0);
+ rrddim_set(st, "writes", (writes - last_writes) ? (writesectors - last_writesectors) / (writes - last_writes) : 0);
+ rrdset_done(st);
+ }
+
+ if(ddo_util && ddo_ops) {
+ st = rrdset_find_bytype("disk_svctm", disk);
+ if(!st) {
+ st = rrdset_create("disk_svctm", disk, NULL, disk, "disk.svctm", "Average Service Time", "ms per operation", 2007, update_every, RRDSET_TYPE_LINE);
+ st->isdetail = 1;
+
+ rrddim_add(st, "svctm", NULL, 1, 1, RRDDIM_ABSOLUTE);
+ }
+ else rrdset_next_usec(st, dt);
+
+ rrddim_set(st, "svctm", ((reads - last_reads) + (writes - last_writes)) ? (busy_ms - last_busy_ms) / ((reads - last_reads) + (writes - last_writes)) : 0);
+ rrdset_done(st);
+ }
+ }
+ }
+
+ return 0;
+}
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