From: Mykola Golub <mgolub@mirantis.com>
Date: Wed, 4 Nov 2015 10:18:52 +0000 (+0200)
Subject: librbd: perf counter for cache invalidates
X-Git-Tag: v10.0.1~111^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=39503f5841d84d7dc6fbacc4df5ff6349a808540;p=ceph.git

librbd: perf counter for cache invalidates

Signed-off-by: Mykola Golub <mgolub@mirantis.com>
---

diff --git a/src/librbd/ImageCtx.cc b/src/librbd/ImageCtx.cc
index 031893c6e36..ecb246ca39a 100644
--- a/src/librbd/ImageCtx.cc
+++ b/src/librbd/ImageCtx.cc
@@ -294,6 +294,7 @@ public:
     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");
+    plb.add_u64_counter(l_librbd_invalidate_cache, "invalidate_cache", "Cache invalidates");
 
     perfcounter = plb.create_perf_counters();
     cct->get_perfcounters_collection()->add(perfcounter);
diff --git a/src/librbd/internal.cc b/src/librbd/internal.cc
index 812ef459373..da0c9bcf0d0 100644
--- a/src/librbd/internal.cc
+++ b/src/librbd/internal.cc
@@ -3617,6 +3617,7 @@ reprotect_and_return_err:
     RWLock::RLocker owner_locker(ictx->owner_lock);
     RWLock::WLocker md_locker(ictx->md_lock);
     r = ictx->invalidate_cache();
+    ictx->perfcounter->inc(l_librbd_invalidate_cache);
     return r;
   }
 
diff --git a/src/librbd/internal.h b/src/librbd/internal.h
index 3d35ee0bc29..4245b43f810 100644
--- a/src/librbd/internal.h
+++ b/src/librbd/internal.h
@@ -42,6 +42,8 @@ enum {
   l_librbd_readahead,
   l_librbd_readahead_bytes,
 
+  l_librbd_invalidate_cache,
+
   l_librbd_last,
 };