Add meminfo UMA collection.

metrics_daemon.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef METRICS_DAEMON_H_
 #define METRICS_DAEMON_H_
 
 #include <dbus/dbus.h>
 #include <glib.h>
 #include <map>
@@ skipping 31 matching lines @@
   FRIEND_TEST(MetricsDaemonTest, ComputeEpochNoCurrent);
   FRIEND_TEST(MetricsDaemonTest, ComputeEpochNoLast);
   FRIEND_TEST(MetricsDaemonTest, GetHistogramPath);
   FRIEND_TEST(MetricsDaemonTest, IsNewEpoch);
   FRIEND_TEST(MetricsDaemonTest, LookupPowerState);
   FRIEND_TEST(MetricsDaemonTest, LookupScreenSaverState);
   FRIEND_TEST(MetricsDaemonTest, LookupSessionState);
   FRIEND_TEST(MetricsDaemonTest, MessageFilter);
   FRIEND_TEST(MetricsDaemonTest, PowerStateChanged);
   FRIEND_TEST(MetricsDaemonTest, ProcessKernelCrash);
+  FRIEND_TEST(MetricsDaemonTest, ProcessMeminfo);
+  FRIEND_TEST(MetricsDaemonTest, ProcessMeminfo2);
   FRIEND_TEST(MetricsDaemonTest, ProcessUncleanShutdown);
   FRIEND_TEST(MetricsDaemonTest, ProcessUserCrash);
   FRIEND_TEST(MetricsDaemonTest, ReportCrashesDailyFrequency);
   FRIEND_TEST(MetricsDaemonTest, ReportDailyUse);
   FRIEND_TEST(MetricsDaemonTest, ReportDiskStats);
   FRIEND_TEST(MetricsDaemonTest, ReportKernelCrashInterval);
   FRIEND_TEST(MetricsDaemonTest, ReportUncleanShutdownInterval);
   FRIEND_TEST(MetricsDaemonTest, ReportUserCrashInterval);
   FRIEND_TEST(MetricsDaemonTest, ScreenSaverStateChanged);
   FRIEND_TEST(MetricsDaemonTest, SendMetric);
@@ skipping 56 matching lines @@
   static const char kMetricUncleanShutdownsWeeklyName[];
   static const char kMetricUserCrashesDailyName[];
   static const char kMetricUserCrashesWeeklyName[];
   static const char kMetricUserCrashIntervalName[];
   static const char kMetricReadSectorsLongName[];
   static const char kMetricReadSectorsShortName[];
   static const char kMetricWriteSectorsLongName[];
   static const char kMetricWriteSectorsShortName[];
   static const int kMetricDiskStatsShortInterval;
   static const int kMetricDiskStatsLongInterval;
+  static const int kMetricMeminfoInterval;
   static const int kMetricSectorsIOMax;
   static const int kMetricSectorsBuckets;
   static const char kMetricsDiskStatsPath[];
 
   // D-Bus message match strings.
   static const char* kDBusMatches_[];
 
   // Array of power states.
   static const char* kPowerStates_[kNumberPowerStates];
 
@@ skipping 89 matching lines @@
 
   // Report daily use through UMA.
   static void ReportDailyUse(void* handle, int tag, int count);
 
   // Sends a regular (exponential) histogram sample to Chrome for
   // transport to UMA. See MetricsLibrary::SendToUMA in
   // metrics_library.h for a description of the arguments.
   void SendMetric(const std::string& name, int sample,
                   int min, int max, int nbuckets);
 
+  // Sends a linear histogram sample to Chrome for transport to UMA. See
+  // MetricsLibrary::SendToUMA in metrics_library.h for a description of the
+  // arguments.
+  void SendLinearMetric(const std::string& name, int sample,
+                        int max, int nbuckets);
+
   // Initializes disk stats reporting.
   void DiskStatsReporterInit();
 
   // Schedules a callback for the next disk stats collection.
   void ScheduleDiskStatsCallback(int wait);
 
   // Reads cumulative disk statistics from sysfs.
   void DiskStatsReadStats(long int* read_sectors, long int* write_sectors);
 
   // Reports disk statistics (static version for glib).  Arguments are a glib
   // artifact.
   static gboolean DiskStatsCallbackStatic(void* handle);
 
   // Reports disk statistics.
   void DiskStatsCallback();
 
+  // Schedules meminfo collection callback.
+  void ScheduleMeminfoCallback(int wait);
+
+  // Reports memory statistics (static version for glib).  Argument is a glib
+  // artifact.
+  static gboolean MeminfoCallbackStatic(void* handle);
+
+  // Reports memory statistics.  Returns false on failure.
+  gboolean MeminfoCallback();
+
+  // Parses content of /proc/meminfo and sends fields of interest to UMA.
+  // Returns false on errors.
+  gboolean ProcessMeminfo(std::string meminfo);
+
   // Test mode.
   bool testing_;
 
   // The metrics library handle.
   MetricsLibraryInterface* metrics_lib_;
 
   // Timestamps last network state update.  This timestamp is used to
   // sample the time from the network going online to going offline so
   // TimeTicks ensures a monotonically increasing TimeDelta.
   base::TimeTicks network_state_last_;
@@ skipping 38 matching lines @@
 
   // Contains the most recent disk stats.
   long int read_sectors_;
   long int write_sectors_;
 
   DiskStatsState diskstats_state_;
   std::string diskstats_path_;
 };
 
 #endif  // METRICS_DAEMON_H_