Add DiskIo to Statsd
Adds diskio information to statsd. The puller queries the
proc/uid_io/stats file to get cumulative counts since boot.
Bug: b/116331466
Test: unit test
Test: manually verified that the puller and "cat /proc/uid_io/stats"
returned almost identical output when executed at the same time
Change-Id: Iac446f8dd879ab6bf859eed6e779cc16fdee6c5b
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 30d8bfc..988ffc4 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -178,6 +178,7 @@
BatteryVoltage battery_voltage = 10030;
NumFingerprints num_fingerprints = 10031;
ProcStats proc_stats = 10029;
+ DiskIo disk_io = 10032;
}
// DO NOT USE field numbers above 100,000 in AOSP.
@@ -2622,6 +2623,30 @@
}
/**
+ * Pulls per uid I/O stats. The stats are cumulative since boot.
+ *
+ * Read/write bytes are I/O events from a storage device
+ * Read/write chars are data requested by read/write syscalls, and can be
+ * satisfied by caching.
+ *
+ * Pulled from StatsCompanionService, which reads proc/uid_io/stats.
+ */
+message DiskIo {
+ optional int32 uid = 1 [(is_uid) = true];
+ optional int64 fg_chars_read = 2;
+ optional int64 fg_chars_write = 3;
+ optional int64 fg_bytes_read = 4;
+ optional int64 fg_bytes_write = 5;
+ optional int64 bg_chars_read = 6;
+ optional int64 bg_chars_write = 7;
+ optional int64 bg_bytes_read = 8;
+ optional int64 bg_bytes_write = 9;
+ optional int64 fg_fsync = 10;
+ optional int64 bg_fsync= 11;
+}
+
+
+/**
* Pulls the number of fingerprints for each user.
*
* Pulled from StatsCompanionService, which queries FingerprintManager.