Add a few histograms to the disk cache.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@735 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 0 deletions

diff --git a/net/disk_cache/rankings.cc b/net/disk_cache/rankings.cc
index 81b5767..42667cc 100644
--- a/net/disk_cache/rankings.cc
+++ b/net/disk_cache/rankings.cc
@@ -29,6 +29,7 @@
 
 #include "net/disk_cache/rankings.h"
 
+#include "base/histogram.h"
 #include "net/disk_cache/backend_impl.h"
 #include "net/disk_cache/entry_impl.h"
 #include "net/disk_cache/errors.h"
@@ -203,6 +204,7 @@ void Rankings::Reset() {
 }
 
 bool Rankings::GetRanking(CacheRankingsBlock* rankings) {
+  Time start = Time::Now();
   if (!rankings->address().is_initialized())
     return false;
 
@@ -233,6 +235,7 @@ bool Rankings::GetRanking(CacheRankingsBlock* rankings) {
   EntryImpl* cache_entry =
       reinterpret_cast<EntryImpl*>(rankings->Data()->pointer);
   rankings->SetData(cache_entry->rankings()->Data());
+  UMA_HISTOGRAM_TIMES(L"DiskCache.GetRankings", Time::Now() - start);
   return true;
 }
 
@@ -380,8 +383,10 @@ void Rankings::Remove(CacheRankingsBlock* node) {
 // but the net effect is just an assert on debug when attempting to remove the
 // entry. Otherwise we'll need reentrant transactions, which is an overkill.
 void Rankings::UpdateRank(CacheRankingsBlock* node, bool modified) {
+  Time start = Time::Now();
   Remove(node);
   Insert(node, modified);
+  UMA_HISTOGRAM_TIMES(L"DiskCache.UpdateRank", Time::Now() - start);
 }
 
 void Rankings::CompleteTransaction() {