Previously i was recording number of RTT's vs Kilobytes of data downloaded per...

Previously i was recording number of RTT's vs Kilobytes of data downloaded per http transaction. This was generating lots of histograms.
Removing them for efficiency.

Review URL: http://codereview.chromium.org/7714020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98562 0039d316-1c4b-4281-b951-d872f2087c98

net/http/http_basic_stream.cc

@@ -127,43 +127,7 @@ bool HttpBasicStream::IsSpdyHttpStream() const {
 }
 
 void HttpBasicStream::LogNumRttVsBytesMetrics() const {
-  int socket_reuse_policy = GetSocketReusePolicy();
-  if (socket_reuse_policy > 2 || socket_reuse_policy < 0) {
-    return;
-  }
-
-  int64 total_bytes_read = connection_->socket()->NumBytesRead();
-  int64 bytes_received = total_bytes_read - bytes_read_offset_;
-  int64 num_kb = bytes_received / 1024;
-  double rtt = connection_->socket()->GetConnectTimeMicros().ToInternalValue();
-  rtt /= 1000.0;
-
-  if (num_kb < 1024 && rtt > 0) {  // Ignore responses > 1MB
-    base::TimeDelta duration = base::Time::Now() -
-                               response_->request_time;
-    double num_rtt = static_cast<double>(duration.InMilliseconds()) / rtt;
-    int64 num_rtt_scaled = (4 * num_rtt);
-
-    static const char* const kGroups[] = {
-      "warmest_socket", "warm_socket", "last_accessed_socket"
-    };
-    int bucket = (num_kb / 5) * 5;
-    const std::string histogram(StringPrintf("Net.Num_RTT_vs_KB_%s_%dKB",
-                                             kGroups[socket_reuse_policy],
-                                             bucket));
-    base::Histogram* counter = base::Histogram::FactoryGet(
-        histogram, 0, 1000, 2, base::Histogram::kUmaTargetedHistogramFlag);
-    DCHECK_EQ(histogram, counter->histogram_name());
-    counter->Add(num_rtt_scaled);
-
-    VLOG(2) << StringPrintf("%s\nrtt = %f\tnum_rtt = %f\t"
-                            "num_kb = %" PRId64 "\t"
-                            "total bytes = %" PRId64 "\t"
-                            "histogram = %s",
-                            request_line_.data(),
-                            rtt, num_rtt, num_kb, total_bytes_read,
-                            histogram.data());
-  }
+  // Log rtt metrics here.
 }
 
 }  // namespace net

net/http/http_network_transaction_unittest.cc

@@ -333,34 +333,6 @@ static const char kExpectedNPNString[] = "\x08http/1.1\x06spdy/2";
 static const char kAlternateProtocolHttpHeader[] =
     "Alternate-Protocol: 443:npn-spdy/2\r\n\r\n";
 
-TEST_F(HttpNetworkTransactionTest, LogNumRttVsBytesMetrics_WarmestSocket) {
-  MockRead data_reads[1000];
-  data_reads[0] = MockRead("HTTP/1.0 200 OK\r\n\r\n");
-  for (int i = 1; i < 999; i++) {
-    data_reads[i] = MockRead("Gagan is a good boy!");
-  }
-  data_reads[999] = MockRead(false, OK);
-
-  net::SetSocketReusePolicy(0);
-  SimpleGetHelperResult out = SimpleGetHelper(data_reads,
-                                              arraysize(data_reads));
-
-  base::Histogram* histogram = NULL;
-  base::StatisticsRecorder::FindHistogram(
-      "Net.Num_RTT_vs_KB_warmest_socket_15KB", &histogram);
-  CHECK(histogram);
-
-  base::Histogram::SampleSet sample_set;
-  histogram->SnapshotSample(&sample_set);
-  EXPECT_EQ(1, sample_set.TotalCount());
-
-  EXPECT_EQ(OK, out.rv);
-  EXPECT_EQ("HTTP/1.0 200 OK", out.status_line);
-}
-
-// TODO(gagansingh): Add test for LogNumRttVsBytesMetrics_LastAccessSocket once
-// it is possible to clear histograms from previous tests.
-
 TEST_F(HttpNetworkTransactionTest, Basic) {
   SessionDependencies session_deps;
   scoped_ptr<HttpTransaction> trans(