| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| syntax = "proto2"; |
| |
| package perfetto.protos; |
| |
| message FtraceConfig { |
| repeated string ftrace_events = 1; |
| repeated string atrace_categories = 2; |
| repeated string atrace_apps = 3; |
| // *Per-CPU* buffer size. |
| optional uint32 buffer_size_kb = 10; |
| optional uint32 drain_period_ms = 11; |
| |
| // Configuration for compact encoding of scheduler events. When enabled (and |
| // recording the relevant ftrace events), specific high-volume events are |
| // encoded in a denser format than normal. |
| message CompactSchedConfig { |
| // If true, and sched_switch or sched_waking ftrace events are enabled, |
| // record those events in the compact format. |
| optional bool enabled = 1; |
| } |
| optional CompactSchedConfig compact_sched = 12; |
| |
| // Enables symbol name resolution against /proc/kallsyms. |
| // It requires that either traced_probes is running as root or that |
| // kptr_restrict has been manually lowered. |
| // It does not disclose KASLR, symbol addresses are mangled. |
| optional bool symbolize_ksyms = 13; |
| |
| // By default the kernel symbolizer is lazily initialized on a deferred task |
| // to reduce ftrace's time-to-start-recording. Unfortunately that makes |
| // ksyms integration tests hard. This flag forces the kernel symbolizer to be |
| // initialized synchronously on the data source start and hence avoiding |
| // timing races in tests. |
| optional bool initialize_ksyms_synchronously_for_testing = 14; |
| |
| // When this boolean is true AND the ftrace_events contains "kmem/rss_stat", |
| // this option causes traced_probes to enable the "kmem/rss_stat_throttled" |
| // event instad if present, and fall back to "kmem/rss_stat" if not present. |
| // The historical context for this is the following: |
| // - Up to Android S (12), the rss_stat was internally throttled in its |
| // kernel implementation. |
| // - A change introduced in the kernels after S has introduced a new |
| // "rss_stat_throttled" making the original "rss_stat" event unthrottled |
| // (hence very spammy). |
| // - Not all Android T/13 devices will receive a new kernel though, hence we |
| // need to deal with both cases. |
| // For more context: go/rss-stat-throttled. |
| // TODO(kaleshsingh): implement the logic behind this. Right now this flag |
| // does nothing. |
| optional bool throttle_rss_stat = 15; |
| |
| // If true, avoid enabling events that aren't statically known by |
| // traced_probes. Otherwise, the default is to emit such events as |
| // GenericFtraceEvent protos. |
| // Prefer to keep this flag at its default. This was added for Android |
| // tracing, where atrace categories and/or atrace HAL requested events can |
| // expand to events that aren't of interest to the tracing user. |
| // Introduced in: Android T. |
| optional bool disable_generic_events = 16; |
| } |