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1/*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17syntax = "proto2";
18option optimize_for = LITE_RUNTIME;
19
20package perfetto.protos;
21
22import "perfetto/common/sys_stats_counters.proto";
23
24// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
25// to reflect changes in the corresponding C++ headers.
26
27// This file defines the configuration for the Linux /proc poller data source,
28// which injects counters in the trace.
29// Counters that are needed in the trace must be explicitly listed in the
30// *_counters fields. This is to avoid spamming the trace with all counters
31// at all times.
32// The sampling rate is configurable. All polling rates (*_period_ms) need
33// to be integer multiples of each other.
34// OK:     [10ms, 10ms, 10ms],  [10ms, 20ms, 10ms],  [10ms, 20ms, 60ms]
35// Not OK: [10ms, 10ms, 11ms],  [10ms, 15ms, 20ms]
36message SysStatsConfig {
37  // Polls /proc/meminfo every X ms, if non-zero.
38  // This is required to be > 10ms to avoid excessive CPU usage.
39  // Cost: 0.3 ms [read] + 0.07 ms [parse + trace injection]
40  optional uint32 meminfo_period_ms = 1;
41
42  // Only the counters specified below are reported.
43  repeated MeminfoCounters meminfo_counters = 2;
44
45  // Polls /proc/vmstat every X ms, if non-zero.
46  // This is required to be > 10ms to avoid excessive CPU usage.
47  // Cost: 0.2 ms [read] + 0.3 ms [parse + trace injection]
48  optional uint32 vmstat_period_ms = 3;
49  repeated VmstatCounters vmstat_counters = 4;
50
51  // Pols /proc/stat every X ms, if non-zero.
52  // This is required to be > 10ms to avoid excessive CPU usage.
53  // Cost: 4.1 ms [read] + 1.9 ms [parse + trace injection]
54  optional uint32 stat_period_ms = 5;
55  enum StatCounters {
56    STAT_UNSPECIFIED = 0;
57    STAT_CPU_TIMES = 1;
58    STAT_IRQ_COUNTS = 2;
59    STAT_SOFTIRQ_COUNTS = 3;
60    STAT_FORK_COUNT = 4;
61  }
62  repeated StatCounters stat_counters = 6;
63}
64