librdb: add perf counters descriptions

Sign-off-by: Alyona Kiseleva <akiselyova@mirantis.com>

diff --git a/src/librbd/ImageCtx.cc b/src/librbd/ImageCtx.cc
index 323964ae08a268fc86bcacf42138215a1e0c93e1..7b239d6c3004493d399344faf46580d1202dcf56 100644 (file)
--- a/src/librbd/ImageCtx.cc
+++ b/src/librbd/ImageCtx.cc
@@ -237,34 +237,34 @@ namespace librbd {
   void ImageCtx::perf_start(string name) {
     PerfCountersBuilder plb(cct, name, l_librbd_first, l_librbd_last);
 
-    plb.add_u64_counter(l_librbd_rd, "rd");
-    plb.add_u64_counter(l_librbd_rd_bytes, "rd_bytes");
-    plb.add_time_avg(l_librbd_rd_latency, "rd_latency");
-    plb.add_u64_counter(l_librbd_wr, "wr");
-    plb.add_u64_counter(l_librbd_wr_bytes, "wr_bytes");
-    plb.add_time_avg(l_librbd_wr_latency, "wr_latency");
-    plb.add_u64_counter(l_librbd_discard, "discard");
-    plb.add_u64_counter(l_librbd_discard_bytes, "discard_bytes");
-    plb.add_time_avg(l_librbd_discard_latency, "discard_latency");
-    plb.add_u64_counter(l_librbd_flush, "flush");
-    plb.add_u64_counter(l_librbd_aio_rd, "aio_rd");
-    plb.add_u64_counter(l_librbd_aio_rd_bytes, "aio_rd_bytes");
-    plb.add_time_avg(l_librbd_aio_rd_latency, "aio_rd_latency");
-    plb.add_u64_counter(l_librbd_aio_wr, "aio_wr");
-    plb.add_u64_counter(l_librbd_aio_wr_bytes, "aio_wr_bytes");
-    plb.add_time_avg(l_librbd_aio_wr_latency, "aio_wr_latency");
-    plb.add_u64_counter(l_librbd_aio_discard, "aio_discard");
-    plb.add_u64_counter(l_librbd_aio_discard_bytes, "aio_discard_bytes");
-    plb.add_time_avg(l_librbd_aio_discard_latency, "aio_discard_latency");
-    plb.add_u64_counter(l_librbd_aio_flush, "aio_flush");
-    plb.add_time_avg(l_librbd_aio_flush_latency, "aio_flush_latency");
-    plb.add_u64_counter(l_librbd_snap_create, "snap_create");
-    plb.add_u64_counter(l_librbd_snap_remove, "snap_remove");
-    plb.add_u64_counter(l_librbd_snap_rollback, "snap_rollback");
-    plb.add_u64_counter(l_librbd_notify, "notify");
-    plb.add_u64_counter(l_librbd_resize, "resize");
-    plb.add_u64_counter(l_librbd_readahead, "readahead");
-    plb.add_u64_counter(l_librbd_readahead_bytes, "readahead_bytes");
+    plb.add_u64_counter(l_librbd_rd, "rd", "Reads");
+    plb.add_u64_counter(l_librbd_rd_bytes, "rd_bytes", "Data size in reads");
+    plb.add_time_avg(l_librbd_rd_latency, "rd_latency", "Latency of reads");
+    plb.add_u64_counter(l_librbd_wr, "wr", "Writes");
+    plb.add_u64_counter(l_librbd_wr_bytes, "wr_bytes", "Written data");
+    plb.add_time_avg(l_librbd_wr_latency, "wr_latency", "Write latency");
+    plb.add_u64_counter(l_librbd_discard, "discard", "Discards");
+    plb.add_u64_counter(l_librbd_discard_bytes, "discard_bytes", "Discarded data");
+    plb.add_time_avg(l_librbd_discard_latency, "discard_latency", "Discard latency");
+    plb.add_u64_counter(l_librbd_flush, "flush", "Flushes");
+    plb.add_u64_counter(l_librbd_aio_rd, "aio_rd", "Async reads");
+    plb.add_u64_counter(l_librbd_aio_rd_bytes, "aio_rd_bytes", "Data size in async reads");
+    plb.add_time_avg(l_librbd_aio_rd_latency, "aio_rd_latency", "Latency of async reads");
+    plb.add_u64_counter(l_librbd_aio_wr, "aio_wr", "Async writes");
+    plb.add_u64_counter(l_librbd_aio_wr_bytes, "aio_wr_bytes", "Data size in async writes");
+    plb.add_time_avg(l_librbd_aio_wr_latency, "aio_wr_latency", "Latency of async writes");
+    plb.add_u64_counter(l_librbd_aio_discard, "aio_discard", "Async discards");
+    plb.add_u64_counter(l_librbd_aio_discard_bytes, "aio_discard_bytes", "Data size in async discards");
+    plb.add_time_avg(l_librbd_aio_discard_latency, "aio_discard_latency", "Latency of async discards");
+    plb.add_u64_counter(l_librbd_aio_flush, "aio_flush", "Async flushes");
+    plb.add_time_avg(l_librbd_aio_flush_latency, "aio_flush_latency", "Latency of async flushes");
+    plb.add_u64_counter(l_librbd_snap_create, "snap_create", "Snap creations");
+    plb.add_u64_counter(l_librbd_snap_remove, "snap_remove", "Snap removals");
+    plb.add_u64_counter(l_librbd_snap_rollback, "snap_rollback", "Snap rollbacks");
+    plb.add_u64_counter(l_librbd_notify, "notify", "Updated header notifications");
+    plb.add_u64_counter(l_librbd_resize, "resize", "Resizes");
+    plb.add_u64_counter(l_librbd_readahead, "readahead", "Read ahead");
+    plb.add_u64_counter(l_librbd_readahead_bytes, "readahead_bytes", "Data size in read ahead");
 
     perfcounter = plb.create_perf_counters();
     cct->get_perfcounters_collection()->add(perfcounter);