metrics: reduce perf periodic collection interval to 3 hours from 24

chrome/browser/metrics/perf_provider_chromeos.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 <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 10 matching lines @@
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "chrome/common/chrome_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/debug_daemon_client.h"
 #include "content/public/browser/notification_service.h"
 
 namespace {
 
 // Partition time since login into successive intervals of this size. In each
 // interval, pick a random time to collect a profile.
-// This interval is twenty-four hours.
-const size_t kPerfProfilingIntervalMs = 24 * 60 * 60 * 1000;
+const size_t kPerfProfilingIntervalMs = 3 * 60 * 60 * 1000;
 
 // Default time in seconds perf is run for.
 const size_t kPerfCommandDurationDefaultSeconds = 2;
 
 // Limit the total size of protobufs that can be cached, so they don't take up
 // too much memory. If the size of cached protobufs exceeds this value, stop
 // collecting further perf data. The current value is 4 MB.
 const size_t kCachedPerfDataProtobufSizeThreshold = 4 * 1024 * 1024;
 
 // There may be too many suspends to collect a profile each time there is a
@@ skipping 353 matching lines @@
   DCHECK(!login_time_.is_null());
   collection_data.
       set_ms_after_login((base::TimeTicks::Now() - login_time_)
           .InMilliseconds());
 
   // Finally, store the perf data itself.
   collection_data.mutable_perf_data()->Swap(&perf_data_proto);
 }
 
 }  // namespace metrics