LU-15564 osd: add allocation time histogram

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_io.c

diff --git a/lustre/osd-ldiskfs/osd_io.c b/lustre/osd-ldiskfs/osd_io.c
index 2ee7b41..0447fee 100644 (file)
--- a/lustre/osd-ldiskfs/osd_io.c
+++ b/lustre/osd-ldiskfs/osd_io.c
@@ -1126,6 +1126,7 @@ static int osd_ldiskfs_map_inode_pages(struct inode *inode,
        while (i < pages) {
                long blen, total = 0, previous_total = 0;
                struct ldiskfs_map_blocks map = { 0 };
+               ktime_t time;
 
                if (fp == NULL) { /* start new extent */
                        fp = *page++;
@@ -1219,9 +1220,19 @@ cont_map:
                        else
                                oh->oh_declared_ext--;
                }
+
+               time = ktime_get();
                rc = ldiskfs_map_blocks(handle, inode, &map, create);
+               time = ktime_sub(ktime_get(), time);
+
                if (rc >= 0) {
-                       int c = 0;
+                       struct brw_stats *h = &osd->od_brw_stats;
+                       int idx, c = 0;
+
+                       idx = map.m_flags & LDISKFS_MAP_NEW ?
+                               BRW_ALLOC_TIME : BRW_MAP_TIME;
+                       lprocfs_oh_tally_log2_pcpu(&h->bs_hist[idx],
+                                                  ktime_to_ms(time));
 
                        for (; total < blen && c < map.m_len; c++, total++) {
                                if (rc == 0) {