From 9ce153ce7167c11adba8ac225edc7a707e97c6eb Mon Sep 17 00:00:00 2001 From: Federico Ceratto Date: Wed, 30 Mar 2016 22:40:42 +0100 Subject: Imported Upstream version 1.0.0 --- src/proc_diskstats.c | 470 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 470 insertions(+) create mode 100755 src/proc_diskstats.c (limited to 'src/proc_diskstats.c') 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 +#endif +#include +#include +#include + +#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; +} -- cgit v1.2.3