Reports Prerender and Profile Total Bytes

chrome/browser/prerender/prerender_histograms.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_histograms.h"
 
 #include <string>
 
 #include "base/format_macros.h"
 #include "base/metrics/histogram.h"
@@ skipping 391 matching lines @@
 
 void PrerenderHistograms::RecordPrerenderPageVisitedStatus(
     Origin origin,
     uint8 experiment_id,
     bool visited_before) const {
   PREFIXED_HISTOGRAM_ORIGIN_EXPERIMENT(
       "PageVisitedStatus", origin, experiment_id,
       UMA_HISTOGRAM_BOOLEAN(name, visited_before));
 }
 
+void PrerenderHistograms::RecordNetworkBytes(bool used,
+                                             int64 prerender_bytes,
+                                             int64 profile_bytes) {
+  if (used)
+    UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.Used", prerender_bytes);

[Alexei Svitkine (slow), 2014/02/13 16:28:44]

The default UMA_HISTOGRAM_COUNTS() macro defines a max of 1000000, which is
probably too low when you're logging bytes (i.e. I would expect you might get
enough records above that, that it's worth using a higher max).

Probably, 100M is a good max to use (by reasoning of 10M still possibly being
too low for some pages, so next magnitude).

Change these to:

const int kHistogramMin = 1;
const int kHistogramMax = 100000000;  // 100M.
const int kBucketCount = 50;

UMA_HISTOGRAM_CUSTOM_COUNTS("Prerender.NetworkBytes.Used", prerender_bytes,
                            kHistogramMin, kHistogramMax, kBucketCount)

[jkarlin, 2014/02/13 17:27:52]

Done.  Thanks!

On 2014/02/13 16:28:44, Alexei Svitkine wrote:

+  else
+    UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.Wasted", prerender_bytes);
+
+  UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.TotalForProfile", profile_bytes);
+}
+
 uint8 PrerenderHistograms::GetCurrentExperimentId() const {
   if (!WithinWindow())
     return kNoExperiment;
   return last_experiment_id_;
 }
 
 bool PrerenderHistograms::IsOriginExperimentWash() const {
   if (!WithinWindow())
     return false;
   return origin_experiment_wash_;
 }
 
 }  // namespace prerender