Add more UMA to record whether parallel download is completed/interrupted/cancelled

content/browser/download/download_stats.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 "content/browser/download/download_stats.h"
 
 #include "base/macros.h"
 #include "base/metrics/histogram_functions.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
@@ skipping 371 matching lines @@
   download_len /= 1024;  // In Kilobytes
   UMA_HISTOGRAM_CUSTOM_COUNTS("Download.DownloadSize",
                               download_len,
                               1,
                               max,
                               256);
 }
 
 void RecordDownloadInterrupted(DownloadInterruptReason reason,
                                int64_t received,
-                               int64_t total) {
-  RecordDownloadCount(INTERRUPTED_COUNT);
+                               int64_t total,
+                               bool uses_parallel_requests) {
+  if (uses_parallel_requests)
+    RecordParallelDownloadCount(PARALLEL_DOWNLOAD_INTERRUPTED_COUNT);
+  else
+    RecordDownloadCount(INTERRUPTED_COUNT);
+
+  std::string histogram_name = uses_parallel_requests ?
+      "Download.ParallelDownloadInterruptedReason" :
+      "Download.InterruptedReason";
+
   UMA_HISTOGRAM_CUSTOM_ENUMERATION(
-      "Download.InterruptedReason",
+      histogram_name,
       reason,
       base::CustomHistogram::ArrayToCustomRanges(
           kAllInterruptReasonCodes, arraysize(kAllInterruptReasonCodes)));
 
   // The maximum should be 2^kBuckets, to have the logarithmic bucket
   // boundaries fall on powers of 2.
   static const int kBuckets = 30;
   static const int64_t kMaxKb = 1 << kBuckets;  // One Terabyte, in Kilobytes.
   int64_t delta_bytes = total - received;
   bool unknown_size = total <= 0;
   int64_t received_kb = received / 1024;
   int64_t total_kb = total / 1024;
-  UMA_HISTOGRAM_CUSTOM_COUNTS("Download.InterruptedReceivedSizeK",
+  histogram_name = uses_parallel_requests ?
+      "Download.ParallelDownloadInterruptedReceivedSizeK" :
+      "Download.InterruptedReceivedSizeK";
+
+  UMA_HISTOGRAM_CUSTOM_COUNTS(histogram_name,
                               received_kb,
                               1,
                               kMaxKb,
                               kBuckets);
   if (!unknown_size) {
-    UMA_HISTOGRAM_CUSTOM_COUNTS("Download.InterruptedTotalSizeK",
+    histogram_name = uses_parallel_requests ?
+        "Download.ParallelDownloadInterruptedTotalSizeK" :
+        "Download.InterruptedTotalSizeK";
+    UMA_HISTOGRAM_CUSTOM_COUNTS(histogram_name,
                                 total_kb,
                                 1,
                                 kMaxKb,
                                 kBuckets);
     if (delta_bytes == 0) {
-      RecordDownloadCount(INTERRUPTED_AT_END_COUNT);
+      if (uses_parallel_requests)
+        RecordParallelDownloadCount(PARALLEL_DOWNLOAD_INTERRUPTED_AT_END_COUNT);
+      else
+        RecordDownloadCount(INTERRUPTED_AT_END_COUNT);
+      histogram_name = uses_parallel_requests ?
+          "Download.ParallelDownloadInterruptedAtEndReason" :
+          "Download.InterruptedAtEndReason";
       UMA_HISTOGRAM_CUSTOM_ENUMERATION(
-          "Download.InterruptedAtEndReason",
+          histogram_name,
           reason,
           base::CustomHistogram::ArrayToCustomRanges(
               kAllInterruptReasonCodes,
               arraysize(kAllInterruptReasonCodes)));
     } else if (delta_bytes > 0) {
-      UMA_HISTOGRAM_CUSTOM_COUNTS("Download.InterruptedOverrunBytes",
+      histogram_name = uses_parallel_requests ?
+          "Download.ParallelDownloadInterruptedOverrunBytes" :
+          "Download.InterruptedOverrunBytes";
+      UMA_HISTOGRAM_CUSTOM_COUNTS(histogram_name,
                                   delta_bytes,
                                   1,
                                   kMaxKb,
                                   kBuckets);
     } else {
-      UMA_HISTOGRAM_CUSTOM_COUNTS("Download.InterruptedUnderrunBytes",
+      histogram_name = uses_parallel_requests ?
+          "Download.ParallelDownloadInterruptedUnderrunBytes" :
+          "Download.InterruptedUnderrunBytes";
+      UMA_HISTOGRAM_CUSTOM_COUNTS(histogram_name,
                                   -delta_bytes,
                                   1,
                                   kMaxKb,
                                   kBuckets);
     }
   }
 
   UMA_HISTOGRAM_BOOLEAN("Download.InterruptedUnknownSize", unknown_size);
 }
 
@@ skipping 274 matching lines @@
 void RecordFileBandwidth(size_t length,
                          base::TimeDelta disk_write_time,
                          base::TimeDelta elapsed_time) {
   RecordBandwidthMetric("Download.BandwidthOverallBytesPerSecond",
                         CalculateBandwidthBytesPerSecond(length, elapsed_time));
   RecordBandwidthMetric(
       "Download.BandwidthDiskBytesPerSecond",
       CalculateBandwidthBytesPerSecond(length, disk_write_time));
 }
 
+void RecordParallelDownloadCount(ParallelDownloadCountTypes type) {
+  UMA_HISTOGRAM_ENUMERATION(
+      "Download.ParallelDownloadCounts", type,
+      PARALLEL_DOWNLOAD_COUNT_TYPES_LAST_ENTRY);
+}
+
 void RecordParallelDownloadStats(
     size_t bytes_downloaded_with_parallel_streams,
     base::TimeDelta time_with_parallel_streams,
     size_t bytes_downloaded_without_parallel_streams,
     base::TimeDelta time_without_parallel_streams) {
   int bandwidth_without_parallel_streams = CalculateBandwidthBytesPerSecond(
       bytes_downloaded_without_parallel_streams, time_without_parallel_streams);
   RecordBandwidthMetric(
       "Download.BandwidthWithoutParallelStreamsBytesPerSecond",
       bandwidth_without_parallel_streams);
@@ skipping 99 matching lines @@
   if (!page_transition)
     return;
 
   UMA_HISTOGRAM_ENUMERATION(
       "Download.PageTransition",
       ui::PageTransitionStripQualifier(page_transition.value()),
       ui::PAGE_TRANSITION_LAST_CORE + 1);
 }
 
 }  // namespace content