3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 only,
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License version 2 for more details (a copy is included
13 * in the LICENSE file that accompanied this code).
15 * You should have received a copy of the GNU General Public License
16 * version 2 along with this program; If not, see
17 * http://www.gnu.org/licenses/gpl-2.0.html
22 * Copyright (c) 2012, 2016, Intel Corporation.
23 * Use is subject to license terms.
25 * Author: Niu Yawei <niu@whamcloud.com>
28 * lustre/obdclass/lprocfs_jobstats.c
31 #define DEBUG_SUBSYSTEM S_CLASS
33 #include <obd_class.h>
34 #include <lprocfs_status.h>
39 * JobID formats & JobID environment variable names for supported
43 * JobID format: 32 bit integer.
44 * JobID env var: SLURM_JOB_ID.
46 * JobID format: Decimal integer range to 99999.
47 * JobID env var: JOB_ID.
49 * JobID format: 6 digit integer by default (up to 999999), can be
50 * increased to 10 digit (up to 2147483646).
51 * JobID env var: LSB_JOBID.
53 * JobID format: String of machine_name.cluster_id.process_id, for
54 * example: fr2n02.32.0
55 * JobID env var: LOADL_STEP_ID.
57 * JobID format: String of sequence_number[.server_name][@server].
58 * JobID env var: PBS_JOBID.
60 * JobID format: Same as PBS.
61 * JobID env var: Same as PBS.
65 struct hlist_node js_hash; /* hash struct for this jobid */
66 struct list_head js_list; /* on ojs_list, with ojs_lock */
67 atomic_t js_refcount; /* num users of this struct */
68 char js_jobid[LUSTRE_JOBID_SIZE]; /* job name + NUL*/
69 ktime_t js_time_init; /* time of initial stat*/
70 ktime_t js_time_latest; /* time of most recent stat*/
71 struct lprocfs_stats *js_stats; /* per-job statistics */
72 struct obd_job_stats *js_jobstats; /* for accessing ojs_lock */
76 job_stat_hash(struct cfs_hash *hs, const void *key, unsigned mask)
78 return cfs_hash_djb2_hash(key, strlen(key), mask);
81 static void *job_stat_key(struct hlist_node *hnode)
84 job = hlist_entry(hnode, struct job_stat, js_hash);
88 static int job_stat_keycmp(const void *key, struct hlist_node *hnode)
91 job = hlist_entry(hnode, struct job_stat, js_hash);
92 return (strlen(job->js_jobid) == strlen(key)) &&
93 !strncmp(job->js_jobid, key, strlen(key));
96 static void *job_stat_object(struct hlist_node *hnode)
98 return hlist_entry(hnode, struct job_stat, js_hash);
101 static void job_stat_get(struct cfs_hash *hs, struct hlist_node *hnode)
103 struct job_stat *job;
104 job = hlist_entry(hnode, struct job_stat, js_hash);
105 atomic_inc(&job->js_refcount);
108 static void job_free(struct job_stat *job)
110 LASSERT(atomic_read(&job->js_refcount) == 0);
111 LASSERT(job->js_jobstats != NULL);
113 write_lock(&job->js_jobstats->ojs_lock);
114 list_del_init(&job->js_list);
115 write_unlock(&job->js_jobstats->ojs_lock);
117 lprocfs_free_stats(&job->js_stats);
121 static void job_putref(struct job_stat *job)
123 LASSERT(atomic_read(&job->js_refcount) > 0);
124 if (atomic_dec_and_test(&job->js_refcount))
128 static void job_stat_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
130 struct job_stat *job;
131 job = hlist_entry(hnode, struct job_stat, js_hash);
135 static void job_stat_exit(struct cfs_hash *hs, struct hlist_node *hnode)
137 CERROR("should not have any items\n");
140 static struct cfs_hash_ops job_stats_hash_ops = {
141 .hs_hash = job_stat_hash,
142 .hs_key = job_stat_key,
143 .hs_keycmp = job_stat_keycmp,
144 .hs_object = job_stat_object,
145 .hs_get = job_stat_get,
146 .hs_put_locked = job_stat_put_locked,
147 .hs_exit = job_stat_exit,
151 * Jobstats expiry iterator to clean up old jobids
153 * Called for each job_stat structure on this device, it should delete stats
154 * older than the specified \a oldest_time in seconds. If \a oldest_time is
155 * in the future then this will delete all statistics (e.g. during shutdown).
157 * \param[in] hs hash of all jobids on this device
158 * \param[in] bd hash bucket containing this jobid
159 * \param[in] hnode hash structure for this jobid
160 * \param[in] data pointer to stats expiry time in seconds
162 static int job_cleanup_iter_callback(struct cfs_hash *hs,
163 struct cfs_hash_bd *bd,
164 struct hlist_node *hnode, void *data)
166 ktime_t oldest_time = *((ktime_t *)data);
167 struct job_stat *job;
169 job = hlist_entry(hnode, struct job_stat, js_hash);
170 if (ktime_before(job->js_time_latest, oldest_time))
171 cfs_hash_bd_del_locked(hs, bd, hnode);
177 * Clean up jobstats that were updated more than \a before seconds ago.
179 * Since this function may be called frequently, do not scan all of the
180 * jobstats on each call, only twice per cleanup interval. That means stats
181 * may be on average around cleanup_interval / 4 older than the cleanup
182 * interval, but that is not considered harmful.
184 * The value stored in ojs_cleanup_interval is how often to perform a cleanup
185 * scan, and 1/2 of the maximum age of the individual statistics. This is
186 * done rather than dividing the interval by two each time, because it is
187 * much easier to do the division when the value is initially set (in seconds)
188 * rather than after it has been converted to ktime_t, and maybe a bit faster.
190 * If \a clear is true then this will force clean up all jobstats
191 * (e.g. at shutdown).
193 * If there is already another thread doing jobstats cleanup, don't try to
194 * do this again in the current thread unless this is a force cleanup.
196 * \param[in] stats stucture tracking all job stats for this device
197 * \param[in] clear clear all job stats if true
199 static void lprocfs_job_cleanup(struct obd_job_stats *stats, bool clear)
201 ktime_t cleanup_interval = stats->ojs_cleanup_interval;
202 ktime_t now = ktime_get_real();
205 if (likely(!clear)) {
206 /* ojs_cleanup_interval of zero means never clean up stats */
207 if (ktime_to_ns(cleanup_interval) == 0)
210 if (ktime_before(now, ktime_add(stats->ojs_cleanup_last,
214 if (stats->ojs_cleaning)
218 write_lock(&stats->ojs_lock);
219 if (!clear && stats->ojs_cleaning) {
220 write_unlock(&stats->ojs_lock);
224 stats->ojs_cleaning = true;
225 write_unlock(&stats->ojs_lock);
227 /* Can't hold ojs_lock over hash iteration, since it is grabbed by
228 * job_cleanup_iter_callback()
229 * ->cfs_hash_bd_del_locked()
233 * Holding ojs_lock isn't necessary for safety of the hash iteration,
234 * since locking of the hash is handled internally, but there isn't
235 * any benefit to having multiple threads doing cleanup at one time.
237 * Subtract twice the cleanup_interval, since it is 1/2 the maximum age.
239 oldest = ktime_sub(now, ktime_add(cleanup_interval, cleanup_interval));
240 cfs_hash_for_each_safe(stats->ojs_hash, job_cleanup_iter_callback,
243 write_lock(&stats->ojs_lock);
244 stats->ojs_cleaning = false;
245 stats->ojs_cleanup_last = ktime_get_real();
246 write_unlock(&stats->ojs_lock);
249 static struct job_stat *job_alloc(char *jobid, struct obd_job_stats *jobs)
251 struct job_stat *job;
257 job->js_stats = lprocfs_alloc_stats(jobs->ojs_cntr_num, 0);
258 if (job->js_stats == NULL) {
263 jobs->ojs_cntr_init_fn(job->js_stats, 0);
265 memcpy(job->js_jobid, jobid, sizeof(job->js_jobid));
266 job->js_time_latest = job->js_stats->ls_init;
267 job->js_jobstats = jobs;
268 INIT_HLIST_NODE(&job->js_hash);
269 INIT_LIST_HEAD(&job->js_list);
270 atomic_set(&job->js_refcount, 1);
275 int lprocfs_job_stats_log(struct obd_device *obd, char *jobid,
276 int event, long amount)
278 struct obd_job_stats *stats = &obd->u.obt.obt_jobstats;
279 struct job_stat *job, *job2;
282 LASSERT(stats != NULL);
283 LASSERT(stats->ojs_hash != NULL);
285 if (event >= stats->ojs_cntr_num)
288 if (jobid == NULL || strlen(jobid) == 0)
291 if (strlen(jobid) >= LUSTRE_JOBID_SIZE) {
292 CERROR("Invalid jobid size (%lu), expect(%d)\n",
293 (unsigned long)strlen(jobid) + 1, LUSTRE_JOBID_SIZE);
297 job = cfs_hash_lookup(stats->ojs_hash, jobid);
301 lprocfs_job_cleanup(stats, false);
303 job = job_alloc(jobid, stats);
307 job2 = cfs_hash_findadd_unique(stats->ojs_hash, job->js_jobid,
312 /* We cannot LASSERT(!list_empty(&job->js_list)) here,
313 * since we just lost the race for inserting "job" into the
314 * ojs_list, and some other thread is doing it _right_now_.
315 * Instead, be content the other thread is doing this, since
316 * "job2" was initialized in job_alloc() already. LU-2163 */
318 LASSERT(list_empty(&job->js_list));
319 write_lock(&stats->ojs_lock);
320 list_add_tail(&job->js_list, &stats->ojs_list);
321 write_unlock(&stats->ojs_lock);
325 LASSERT(stats == job->js_jobstats);
326 job->js_time_latest = ktime_get_real();
327 lprocfs_counter_add(job->js_stats, event, amount);
333 EXPORT_SYMBOL(lprocfs_job_stats_log);
335 void lprocfs_job_stats_fini(struct obd_device *obd)
337 struct obd_job_stats *stats = &obd->u.obt.obt_jobstats;
339 if (stats->ojs_hash == NULL)
342 lprocfs_job_cleanup(stats, true);
343 cfs_hash_putref(stats->ojs_hash);
344 stats->ojs_hash = NULL;
345 LASSERT(list_empty(&stats->ojs_list));
347 EXPORT_SYMBOL(lprocfs_job_stats_fini);
349 static void *lprocfs_jobstats_seq_start(struct seq_file *p, loff_t *pos)
351 struct obd_job_stats *stats = p->private;
353 struct job_stat *job;
355 read_lock(&stats->ojs_lock);
357 return SEQ_START_TOKEN;
359 list_for_each_entry(job, &stats->ojs_list, js_list) {
366 static void lprocfs_jobstats_seq_stop(struct seq_file *p, void *v)
368 struct obd_job_stats *stats = p->private;
370 read_unlock(&stats->ojs_lock);
373 static void *lprocfs_jobstats_seq_next(struct seq_file *p, void *v, loff_t *pos)
375 struct obd_job_stats *stats = p->private;
376 struct job_stat *job;
377 struct list_head *next;
380 if (v == SEQ_START_TOKEN) {
381 next = stats->ojs_list.next;
383 job = (struct job_stat *)v;
384 next = job->js_list.next;
387 return next == &stats->ojs_list ? NULL :
388 list_entry(next, struct job_stat, js_list);
392 * Example of output on MDT:
396 * snapshot_time: 1322494486.123456789
397 * start_time: 1322494476.012345678
398 * elapsed_time: 10.111111111
399 * open: { samples: 1, unit: reqs }
400 * close: { samples: 1, unit: reqs }
401 * mknod: { samples: 0, unit: reqs }
402 * link: { samples: 0, unit: reqs }
403 * unlink: { samples: 0, unit: reqs }
404 * mkdir: { samples: 0, unit: reqs }
405 * rmdir: { samples: 0, unit: reqs }
406 * rename: { samples: 0, unit: reqs }
407 * getattr: { samples: 1, unit: reqs }
408 * setattr: { samples: 0, unit: reqs }
409 * getxattr: { samples: 0, unit: reqs }
410 * setxattr: { samples: 0, unit: reqs }
411 * statfs: { samples: 0, unit: reqs }
412 * sync: { samples: 0, unit: reqs }
414 * Example of output on OST:
418 * snapshot_time: 1322494602.123456789
419 * start_time: 1322494592.987654321
420 * elapsed_time: 9.135802468
421 * read: { samples: 0, unit: bytes, min: 0, max: 0, sum: 0 }
422 * write: { samples: 1, unit: bytes, min: 4096, max: 4096, sum: 4096 }
423 * setattr: { samples: 0, unit: reqs }
424 * punch: { samples: 0, unit: reqs }
425 * sync: { samples: 0, unit: reqs }
428 static const char spaces[] = " ";
430 static int inline width(const char *str, int len)
432 return len - min((int)strlen(str), 15);
435 static int lprocfs_jobstats_seq_show(struct seq_file *p, void *v)
437 struct job_stat *job = v;
438 struct lprocfs_stats *s;
439 struct lprocfs_counter ret;
440 struct lprocfs_counter_header *cntr_header;
441 char escaped[LUSTRE_JOBID_SIZE * 4] = "";
442 char *quote = "", *c, *end;
445 if (v == SEQ_START_TOKEN) {
446 seq_printf(p, "job_stats:\n");
450 /* Quote and escape jobid characters to escape hex codes "\xHH" if
451 * it contains any non-standard characters (space, newline, etc),
452 * so it will be confined to single line and not break parsing.
454 for (c = job->js_jobid, end = job->js_jobid + sizeof(job->js_jobid);
455 c < end && *c != '\0';
458 *c != '.' && *c != '@' && *c != '-' && *c != '_') {
460 snprintf(escaped + joblen, sizeof(escaped), "\\x%02X",
464 escaped[joblen] = *c;
468 seq_printf(p, "- %-16s %s%*s%s\n",
469 "job_id:", quote, joblen, escaped, quote);
470 lprocfs_stats_header(p, job->js_time_latest, job->js_stats->ls_init,
474 for (i = 0; i < s->ls_num; i++) {
475 cntr_header = &s->ls_cnt_header[i];
476 lprocfs_stats_collect(s, i, &ret);
478 seq_printf(p, " %s:%.*s { samples: %11llu",
479 cntr_header->lc_name,
480 width(cntr_header->lc_name, 15), spaces,
482 if (cntr_header->lc_units[0] != '\0')
483 seq_printf(p, ", unit: %5s", cntr_header->lc_units);
485 if (cntr_header->lc_config & LPROCFS_CNTR_AVGMINMAX) {
486 seq_printf(p, ", min: %8llu, max: %8llu, sum: %16llu",
487 ret.lc_count ? ret.lc_min : 0,
488 ret.lc_count ? ret.lc_max : 0,
489 ret.lc_count ? ret.lc_sum : 0);
491 if (cntr_header->lc_config & LPROCFS_CNTR_STDDEV) {
492 seq_printf(p, ", sumsq: %18llu",
493 ret.lc_count ? ret.lc_sumsquare : 0);
496 seq_printf(p, " }\n");
503 static const struct seq_operations lprocfs_jobstats_seq_sops = {
504 .start = lprocfs_jobstats_seq_start,
505 .stop = lprocfs_jobstats_seq_stop,
506 .next = lprocfs_jobstats_seq_next,
507 .show = lprocfs_jobstats_seq_show,
510 static int lprocfs_jobstats_seq_open(struct inode *inode, struct file *file)
512 struct seq_file *seq;
515 rc = seq_open(file, &lprocfs_jobstats_seq_sops);
518 seq = file->private_data;
519 seq->private = PDE_DATA(inode);
523 static ssize_t lprocfs_jobstats_seq_write(struct file *file,
524 const char __user *buf,
525 size_t len, loff_t *off)
527 struct seq_file *seq = file->private_data;
528 struct obd_job_stats *stats = seq->private;
529 char jobid[LUSTRE_JOBID_SIZE];
530 struct job_stat *job;
532 if (len == 0 || len >= LUSTRE_JOBID_SIZE)
535 if (stats->ojs_hash == NULL)
538 if (copy_from_user(jobid, buf, len))
542 /* Trim '\n' if any */
543 if (jobid[len - 1] == '\n')
546 if (strcmp(jobid, "clear") == 0) {
547 lprocfs_job_cleanup(stats, true);
552 if (strlen(jobid) == 0)
555 job = cfs_hash_lookup(stats->ojs_hash, jobid);
559 cfs_hash_del_key(stats->ojs_hash, jobid);
566 * Clean up the seq file state when the /proc file is closed.
568 * This also expires old job stats from the cache after they have been
569 * printed in case the system is idle and not generating new jobstats.
571 * \param[in] inode struct inode for seq file being closed
572 * \param[in] file struct file for seq file being closed
574 * \retval 0 on success
575 * \retval negative errno on failure
577 static int lprocfs_jobstats_seq_release(struct inode *inode, struct file *file)
579 struct seq_file *seq = file->private_data;
580 struct obd_job_stats *stats = seq->private;
582 lprocfs_job_cleanup(stats, false);
584 return lprocfs_seq_release(inode, file);
587 static const struct proc_ops lprocfs_jobstats_seq_fops = {
588 PROC_OWNER(THIS_MODULE)
589 .proc_open = lprocfs_jobstats_seq_open,
590 .proc_read = seq_read,
591 .proc_write = lprocfs_jobstats_seq_write,
592 .proc_lseek = seq_lseek,
593 .proc_release = lprocfs_jobstats_seq_release,
596 int lprocfs_job_stats_init(struct obd_device *obd, int cntr_num,
597 cntr_init_callback init_fn)
599 struct proc_dir_entry *entry;
600 struct obd_job_stats *stats;
603 LASSERT(obd->obd_proc_entry != NULL);
604 LASSERT(obd->obd_type->typ_name);
612 /* Currently needs to be a target due to the use of obt_jobstats. */
613 if (strcmp(obd->obd_type->typ_name, LUSTRE_MDT_NAME) != 0 &&
614 strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME) != 0) {
615 CERROR("%s: invalid device type %s for job stats: rc = %d\n",
616 obd->obd_name, obd->obd_type->typ_name, -EINVAL);
619 stats = &obd->u.obt.obt_jobstats;
621 LASSERT(stats->ojs_hash == NULL);
622 stats->ojs_hash = cfs_hash_create("JOB_STATS",
623 HASH_JOB_STATS_CUR_BITS,
624 HASH_JOB_STATS_MAX_BITS,
625 HASH_JOB_STATS_BKT_BITS, 0,
630 if (stats->ojs_hash == NULL)
633 INIT_LIST_HEAD(&stats->ojs_list);
634 rwlock_init(&stats->ojs_lock);
635 stats->ojs_cntr_num = cntr_num;
636 stats->ojs_cntr_init_fn = init_fn;
637 /* Store 1/2 the actual interval, since we use that the most, and
638 * it is easier to work with.
640 stats->ojs_cleanup_interval = ktime_set(600 / 2, 0); /* default 10 min*/
641 stats->ojs_cleanup_last = ktime_get_real();
643 entry = lprocfs_add_simple(obd->obd_proc_entry, "job_stats", stats,
644 &lprocfs_jobstats_seq_fops);
646 lprocfs_job_stats_fini(obd);
651 EXPORT_SYMBOL(lprocfs_job_stats_init);
652 #endif /* CONFIG_PROC_FS*/
654 ssize_t job_cleanup_interval_show(struct kobject *kobj, struct attribute *attr,
657 struct obd_device *obd = container_of(kobj, struct obd_device,
659 struct obd_job_stats *stats;
660 struct timespec64 ts;
662 stats = &obd->u.obt.obt_jobstats;
663 ts = ktime_to_timespec64(stats->ojs_cleanup_interval);
665 return scnprintf(buf, PAGE_SIZE, "%lld\n", (long long)ts.tv_sec * 2);
667 EXPORT_SYMBOL(job_cleanup_interval_show);
669 ssize_t job_cleanup_interval_store(struct kobject *kobj,
670 struct attribute *attr,
671 const char *buffer, size_t count)
673 struct obd_device *obd = container_of(kobj, struct obd_device,
675 struct obd_job_stats *stats;
679 stats = &obd->u.obt.obt_jobstats;
681 rc = kstrtouint(buffer, 0, &val);
685 stats->ojs_cleanup_interval = ktime_set(val / 2, 0);
686 lprocfs_job_cleanup(stats, false);
690 EXPORT_SYMBOL(job_cleanup_interval_store);