1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
7 option optimize_for = LITE_RUNTIME;
11 import "perf_data.proto";
13 // Protocol buffer for collected sample-based profiling data.
14 // Contains the parameters and data from a single profile collection event.
17 message SampledProfile {
18 // Indicates the event that triggered this collection.
20 UNKNOWN_TRIGGER_EVENT = 0;
22 // The profile was triggered by periodic sampling. Periodically sampled
23 // profiles are collected once per uniformly sized period interval. Within
24 // each interval, the sampled data is collected at a random time. For
25 // example, if the interval is 60 s, then data would be collected at a
26 // random point in each of the intervals [0, 60 s), [60 s, 120 s), etc.
27 PERIODIC_COLLECTION = 1;
29 // The profile was collected upon resume from suspend.
30 RESUME_FROM_SUSPEND = 2;
32 // The profile was collected upon restoring a previous session.
35 optional TriggerEvent trigger_event = 1;
37 // Fields 2-3: Time durations are given in ticks, and represent system uptime
38 // rather than wall time.
40 // Time after system boot when the collection took place, in milliseconds.
41 optional int64 ms_after_boot = 2;
43 // Time after last login when the collection took place, in milliseconds.
44 optional int64 ms_after_login = 3;
46 // The duration for which the machine was suspended prior to collecting the
47 // sampled profile. Only set when |trigger_event| is RESUME_FROM_SUSPEND.
48 optional int64 suspend_duration_ms = 5;
50 // Number of milliseconds after a resume that profile was collected. Only set
51 // when |trigger_event| is RESUME_FROM_SUSPEND.
52 optional int64 ms_after_resume = 6;
54 // Number of tabs restored during a session restore. Only set when
55 // |trigger_event| is RESTORE_SESSION.
56 optional int32 num_tabs_restored = 7;
58 // Number of milliseconds after a session restore that a profile was
59 // collected. Only set when |trigger_event| is RESTORE_SESSION.
60 optional int64 ms_after_restore = 8;
62 // The actual perf data that was collected.
63 optional PerfDataProto perf_data = 4;