-#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 log2)
-{
- 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 %% | %-5s %% 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 (!log2)
- seq_printf(seq, "%u", i);
- else if (i < 10)
- seq_printf(seq, "%u", 1 << i);
- else if (i < 20)
- seq_printf(seq, "%uK", 1 << (i - 10));
- else
- seq_printf(seq, "%uM", 1 << (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;
- char title[24];
-
- /* 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);
-
- sprintf(title, "I/O time (1/%ds)", CFS_HZ);
- display_brw_stats(seq, title, "ios",
- &brw_stats->hist[BRW_R_IO_TIME],
- &brw_stats->hist[BRW_W_IO_TIME], 1);
-
- 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 ofd_brw_stats_seq_show(struct seq_file *seq, void *v)
-{
- struct obd_device *dev = seq->private;
- struct filter_obd *ofd = &dev->u.filter;
-
- brw_stats_show(seq, &ofd->fo_filter_stats);
-
- return 0;
-}
-
-static ssize_t ofd_brw_stats_seq_write(struct file *file, const char *buf,
- size_t len, loff_t *off)
-{
- struct seq_file *seq = file->private_data;
- struct obd_device *dev = seq->private;
- struct filter_obd *ofd = &dev->u.filter;
- int i;
-
- for (i = 0; i < BRW_LAST; i++)
- lprocfs_oh_clear(&ofd->fo_filter_stats.hist[i]);
-
- return len;
-}
-
-LPROC_SEQ_FOPS(ofd_brw_stats);
-
-int lproc_ofd_attach_seqstat(struct obd_device *dev)
-{
- return lprocfs_obd_seq_create(dev, "brw_stats", 0644,
- &ofd_brw_stats_fops, dev);
-}
-