/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifdef LPROCFS
-static const char *osd_counter_names[LPROC_OSD_NR] = {
+void osd_brw_stats_update(struct osd_device *osd, struct osd_iobuf *iobuf)
+{
+ struct brw_stats *s = &osd->od_brw_stats;
+ unsigned long *last_block = NULL;
+ struct page **pages = iobuf->dr_pages;
+ struct page *last_page = NULL;
+ unsigned long discont_pages = 0;
+ unsigned long discont_blocks = 0;
+ unsigned long *blocks = iobuf->dr_blocks;
+ int i, nr_pages = iobuf->dr_npages;
+ int blocks_per_page;
+ int rw = iobuf->dr_rw;
+
+ if (unlikely(nr_pages == 0))
+ return;
+
+ blocks_per_page = CFS_PAGE_SIZE >> osd_sb(osd)->s_blocksize_bits;
+
+ lprocfs_oh_tally_log2(&s->hist[BRW_R_PAGES+rw], nr_pages);
+
+ while (nr_pages-- > 0) {
+ if (last_page && (*pages)->index != (last_page->index + 1))
+ discont_pages++;
+ last_page = *pages;
+ pages++;
+ for (i = 0; i < blocks_per_page; i++) {
+ if (last_block && *blocks != (*last_block + 1))
+ discont_blocks++;
+ last_block = blocks++;
+ }
+ }
+
+ lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_PAGES+rw], discont_pages);
+ lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_BLOCKS+rw], discont_blocks);
+}
+
+#define pct(a, b) (b ? a * 100 / b : 0)
+
+static void display_brw_stats(struct seq_file *seq, char *name, char *units,
+ struct obd_histogram *read, struct obd_histogram *write, int scale)
+{
+ unsigned long read_tot, write_tot, r, w, read_cum = 0, write_cum = 0;
+ int i;
+
+ seq_printf(seq, "\n%26s read | write\n", " ");
+ seq_printf(seq, "%-22s %-5s %% cum %% | %-11s %% cum %%\n",
+ name, units, units);
+
+ read_tot = lprocfs_oh_sum(read);
+ write_tot = lprocfs_oh_sum(write);
+ for (i = 0; i < OBD_HIST_MAX; i++) {
+ r = read->oh_buckets[i];
+ w = write->oh_buckets[i];
+ read_cum += r;
+ write_cum += w;
+ if (read_cum == 0 && write_cum == 0)
+ continue;
+
+ if (!scale)
+ seq_printf(seq, "%u", i);
+ else if (i < 10)
+ seq_printf(seq, "%u", scale << i);
+ else if (i < 20)
+ seq_printf(seq, "%uK", scale << (i-10));
+ else
+ seq_printf(seq, "%uM", scale << (i-20));
+
+ seq_printf(seq, ":\t\t%10lu %3lu %3lu | %4lu %3lu %3lu\n",
+ r, pct(r, read_tot), pct(read_cum, read_tot),
+ w, pct(w, write_tot), pct(write_cum, write_tot));
+
+ if (read_cum == read_tot && write_cum == write_tot)
+ break;
+ }
+}
+
+static void brw_stats_show(struct seq_file *seq, struct brw_stats *brw_stats)
+{
+ struct timeval now;
+
+ /* this sampling races with updates */
+ cfs_gettimeofday(&now);
+ seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
+ now.tv_sec, now.tv_usec);
+
+ display_brw_stats(seq, "pages per bulk r/w", "rpcs",
+ &brw_stats->hist[BRW_R_PAGES],
+ &brw_stats->hist[BRW_W_PAGES], 1);
+
+ display_brw_stats(seq, "discontiguous pages", "rpcs",
+ &brw_stats->hist[BRW_R_DISCONT_PAGES],
+ &brw_stats->hist[BRW_W_DISCONT_PAGES], 0);
+
+ display_brw_stats(seq, "discontiguous blocks", "rpcs",
+ &brw_stats->hist[BRW_R_DISCONT_BLOCKS],
+ &brw_stats->hist[BRW_W_DISCONT_BLOCKS], 0);
+
+ display_brw_stats(seq, "disk fragmented I/Os", "ios",
+ &brw_stats->hist[BRW_R_DIO_FRAGS],
+ &brw_stats->hist[BRW_W_DIO_FRAGS], 0);
+
+ display_brw_stats(seq, "disk I/Os in flight", "ios",
+ &brw_stats->hist[BRW_R_RPC_HIST],
+ &brw_stats->hist[BRW_W_RPC_HIST], 0);
+
+ display_brw_stats(seq, "I/O time (1/1000s)", "ios",
+ &brw_stats->hist[BRW_R_IO_TIME],
+ &brw_stats->hist[BRW_W_IO_TIME], 1000 / CFS_HZ);
+
+ display_brw_stats(seq, "disk I/O size", "ios",
+ &brw_stats->hist[BRW_R_DISK_IOSIZE],
+ &brw_stats->hist[BRW_W_DISK_IOSIZE], 1);
+}
+
+#undef pct
+
+static int osd_brw_stats_seq_show(struct seq_file *seq, void *v)
+{
+ struct osd_device *osd = seq->private;
+
+ brw_stats_show(seq, &osd->od_brw_stats);
+
+ return 0;
+}
+
+static ssize_t osd_brw_stats_seq_write(struct file *file, const char *buf,
+ size_t len, loff_t *off)
+{
+ struct seq_file *seq = file->private_data;
+ struct osd_device *osd = seq->private;
+ int i;
+
+ for (i = 0; i < BRW_LAST; i++)
+ lprocfs_oh_clear(&osd->od_brw_stats.hist[i]);
+
+ return len;
+}
+
+LPROC_SEQ_FOPS(osd_brw_stats);
+
+static int osd_stats_init(struct osd_device *osd)
+{
+ int i, result;
+ ENTRY;
+
+ for (i = 0; i < BRW_LAST; i++)
+ cfs_spin_lock_init(&osd->od_brw_stats.hist[i].oh_lock);
+
+ osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
+ if (osd->od_stats != NULL) {
+ result = lprocfs_register_stats(osd->od_proc_entry, "stats",
+ osd->od_stats);
+ if (result)
+ GOTO(out, result);
+
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
+ LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
+ "get_page", "usec");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
+ LPROCFS_CNTR_AVGMINMAX,
+ "get_page_failures", "num");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
+ LPROCFS_CNTR_AVGMINMAX,
+ "cache_access", "pages");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
+ LPROCFS_CNTR_AVGMINMAX,
+ "cache_hit", "pages");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
+ LPROCFS_CNTR_AVGMINMAX,
+ "cache_miss", "pages");
+#if OSD_THANDLE_STATS
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
+ LPROCFS_CNTR_AVGMINMAX,
+ "thandle starting", "usec");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
+ LPROCFS_CNTR_AVGMINMAX,
+ "thandle open", "usec");
+ lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
+ LPROCFS_CNTR_AVGMINMAX,
+ "thandle closing", "usec");
+#endif
+ lprocfs_seq_create(osd->od_proc_entry, "brw_stats",
+ 0444, &osd_brw_stats_fops, osd);
+ } else
+ result = -ENOMEM;
+
+out:
+ RETURN(result);
+}
+
+static const char *osd_counter_names[] = {
#if OSD_THANDLE_STATS
[LPROC_OSD_THANDLE_STARTING] = "thandle starting",
[LPROC_OSD_THANDLE_OPEN] = "thandle open",
rc = lu_time_init(&osd->od_stats,
osd->od_proc_entry,
osd_counter_names, ARRAY_SIZE(osd_counter_names));
+
+ rc = osd_stats_init(osd);
+
EXIT;
out:
if (rc)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff