protos/perfetto/config/perfetto_config.proto

// AUTOGENERATED - DO NOT EDIT
// ---------------------------
// This file has been generated by
// AOSP://external/perfetto/tools/gen_merged_protos
// merging the perfetto config protos.
// This fused proto is intended to be copied in:
//  - Android tree, for statsd.
//  - Google internal repos.

syntax = "proto2";

package perfetto.protos;

// Begin of protos/perfetto/common/android_log_constants.proto

// Values from NDK's android/log.h.
enum AndroidLogId {
  LID_DEFAULT = 0;  // MAIN.
  LID_RADIO = 1;
  LID_EVENTS = 2;
  LID_SYSTEM = 3;
  LID_CRASH = 4;
  LID_STATS = 5;
  LID_SECURITY = 6;
  LID_KERNEL = 7;
}

enum AndroidLogPriority {
  PRIO_UNSPECIFIED = 0;
  PRIO_UNUSED = 1;  // _DEFAULT, but should never be seen in logs.
  PRIO_VERBOSE = 2;
  PRIO_DEBUG = 3;
  PRIO_INFO = 4;
  PRIO_WARN = 5;
  PRIO_ERROR = 6;
  PRIO_FATAL = 7;
}

// End of protos/perfetto/common/android_log_constants.proto

// Begin of protos/perfetto/common/sys_stats_counters.proto

// When editing entries here remember also to update "sys_stats_counters.h" with
// the corresponding string definitions for the actual /proc files parser.

// Counter definitions for Linux's /proc/meminfo.
enum MeminfoCounters {
  MEMINFO_UNSPECIFIED = 0;
  MEMINFO_MEM_TOTAL = 1;
  MEMINFO_MEM_FREE = 2;
  MEMINFO_MEM_AVAILABLE = 3;
  MEMINFO_BUFFERS = 4;
  MEMINFO_CACHED = 5;
  MEMINFO_SWAP_CACHED = 6;
  MEMINFO_ACTIVE = 7;
  MEMINFO_INACTIVE = 8;
  MEMINFO_ACTIVE_ANON = 9;
  MEMINFO_INACTIVE_ANON = 10;
  MEMINFO_ACTIVE_FILE = 11;
  MEMINFO_INACTIVE_FILE = 12;
  MEMINFO_UNEVICTABLE = 13;
  MEMINFO_MLOCKED = 14;
  MEMINFO_SWAP_TOTAL = 15;
  MEMINFO_SWAP_FREE = 16;
  MEMINFO_DIRTY = 17;
  MEMINFO_WRITEBACK = 18;
  MEMINFO_ANON_PAGES = 19;
  MEMINFO_MAPPED = 20;
  MEMINFO_SHMEM = 21;
  MEMINFO_SLAB = 22;
  MEMINFO_SLAB_RECLAIMABLE = 23;
  MEMINFO_SLAB_UNRECLAIMABLE = 24;
  MEMINFO_KERNEL_STACK = 25;
  MEMINFO_PAGE_TABLES = 26;
  MEMINFO_COMMIT_LIMIT = 27;
  MEMINFO_COMMITED_AS = 28;
  MEMINFO_VMALLOC_TOTAL = 29;
  MEMINFO_VMALLOC_USED = 30;
  MEMINFO_VMALLOC_CHUNK = 31;
  MEMINFO_CMA_TOTAL = 32;
  MEMINFO_CMA_FREE = 33;
}

// Counter definitions for Linux's /proc/vmstat.
enum VmstatCounters {
  VMSTAT_UNSPECIFIED = 0;
  VMSTAT_NR_FREE_PAGES = 1;
  VMSTAT_NR_ALLOC_BATCH = 2;
  VMSTAT_NR_INACTIVE_ANON = 3;
  VMSTAT_NR_ACTIVE_ANON = 4;
  VMSTAT_NR_INACTIVE_FILE = 5;
  VMSTAT_NR_ACTIVE_FILE = 6;
  VMSTAT_NR_UNEVICTABLE = 7;
  VMSTAT_NR_MLOCK = 8;
  VMSTAT_NR_ANON_PAGES = 9;
  VMSTAT_NR_MAPPED = 10;
  VMSTAT_NR_FILE_PAGES = 11;
  VMSTAT_NR_DIRTY = 12;
  VMSTAT_NR_WRITEBACK = 13;
  VMSTAT_NR_SLAB_RECLAIMABLE = 14;
  VMSTAT_NR_SLAB_UNRECLAIMABLE = 15;
  VMSTAT_NR_PAGE_TABLE_PAGES = 16;
  VMSTAT_NR_KERNEL_STACK = 17;
  VMSTAT_NR_OVERHEAD = 18;
  VMSTAT_NR_UNSTABLE = 19;
  VMSTAT_NR_BOUNCE = 20;
  VMSTAT_NR_VMSCAN_WRITE = 21;
  VMSTAT_NR_VMSCAN_IMMEDIATE_RECLAIM = 22;
  VMSTAT_NR_WRITEBACK_TEMP = 23;
  VMSTAT_NR_ISOLATED_ANON = 24;
  VMSTAT_NR_ISOLATED_FILE = 25;
  VMSTAT_NR_SHMEM = 26;
  VMSTAT_NR_DIRTIED = 27;
  VMSTAT_NR_WRITTEN = 28;
  VMSTAT_NR_PAGES_SCANNED = 29;
  VMSTAT_WORKINGSET_REFAULT = 30;
  VMSTAT_WORKINGSET_ACTIVATE = 31;
  VMSTAT_WORKINGSET_NODERECLAIM = 32;
  VMSTAT_NR_ANON_TRANSPARENT_HUGEPAGES = 33;
  VMSTAT_NR_FREE_CMA = 34;
  VMSTAT_NR_SWAPCACHE = 35;
  VMSTAT_NR_DIRTY_THRESHOLD = 36;
  VMSTAT_NR_DIRTY_BACKGROUND_THRESHOLD = 37;
  VMSTAT_PGPGIN = 38;
  VMSTAT_PGPGOUT = 39;
  VMSTAT_PGPGOUTCLEAN = 40;
  VMSTAT_PSWPIN = 41;
  VMSTAT_PSWPOUT = 42;
  VMSTAT_PGALLOC_DMA = 43;
  VMSTAT_PGALLOC_NORMAL = 44;
  VMSTAT_PGALLOC_MOVABLE = 45;
  VMSTAT_PGFREE = 46;
  VMSTAT_PGACTIVATE = 47;
  VMSTAT_PGDEACTIVATE = 48;
  VMSTAT_PGFAULT = 49;
  VMSTAT_PGMAJFAULT = 50;
  VMSTAT_PGREFILL_DMA = 51;
  VMSTAT_PGREFILL_NORMAL = 52;
  VMSTAT_PGREFILL_MOVABLE = 53;
  VMSTAT_PGSTEAL_KSWAPD_DMA = 54;
  VMSTAT_PGSTEAL_KSWAPD_NORMAL = 55;
  VMSTAT_PGSTEAL_KSWAPD_MOVABLE = 56;
  VMSTAT_PGSTEAL_DIRECT_DMA = 57;
  VMSTAT_PGSTEAL_DIRECT_NORMAL = 58;
  VMSTAT_PGSTEAL_DIRECT_MOVABLE = 59;
  VMSTAT_PGSCAN_KSWAPD_DMA = 60;
  VMSTAT_PGSCAN_KSWAPD_NORMAL = 61;
  VMSTAT_PGSCAN_KSWAPD_MOVABLE = 62;
  VMSTAT_PGSCAN_DIRECT_DMA = 63;
  VMSTAT_PGSCAN_DIRECT_NORMAL = 64;
  VMSTAT_PGSCAN_DIRECT_MOVABLE = 65;
  VMSTAT_PGSCAN_DIRECT_THROTTLE = 66;
  VMSTAT_PGINODESTEAL = 67;
  VMSTAT_SLABS_SCANNED = 68;
  VMSTAT_KSWAPD_INODESTEAL = 69;
  VMSTAT_KSWAPD_LOW_WMARK_HIT_QUICKLY = 70;
  VMSTAT_KSWAPD_HIGH_WMARK_HIT_QUICKLY = 71;
  VMSTAT_PAGEOUTRUN = 72;
  VMSTAT_ALLOCSTALL = 73;
  VMSTAT_PGROTATED = 74;
  VMSTAT_DROP_PAGECACHE = 75;
  VMSTAT_DROP_SLAB = 76;
  VMSTAT_PGMIGRATE_SUCCESS = 77;
  VMSTAT_PGMIGRATE_FAIL = 78;
  VMSTAT_COMPACT_MIGRATE_SCANNED = 79;
  VMSTAT_COMPACT_FREE_SCANNED = 80;
  VMSTAT_COMPACT_ISOLATED = 81;
  VMSTAT_COMPACT_STALL = 82;
  VMSTAT_COMPACT_FAIL = 83;
  VMSTAT_COMPACT_SUCCESS = 84;
  VMSTAT_COMPACT_DAEMON_WAKE = 85;
  VMSTAT_UNEVICTABLE_PGS_CULLED = 86;
  VMSTAT_UNEVICTABLE_PGS_SCANNED = 87;
  VMSTAT_UNEVICTABLE_PGS_RESCUED = 88;
  VMSTAT_UNEVICTABLE_PGS_MLOCKED = 89;
  VMSTAT_UNEVICTABLE_PGS_MUNLOCKED = 90;
  VMSTAT_UNEVICTABLE_PGS_CLEARED = 91;
  VMSTAT_UNEVICTABLE_PGS_STRANDED = 92;
}
// End of protos/perfetto/common/sys_stats_counters.proto

// Begin of protos/perfetto/config/android/android_log_config.proto

message AndroidLogConfig {
  repeated AndroidLogId log_ids = 1;

  reserved 2;  // Was |poll_ms|, deprecated.

  // If set ignores all log messages whose prio is < the given value.
  optional AndroidLogPriority min_prio = 3;

  // If non-empty ignores all log messages whose tag doesn't match one of the
  // specified values.
  repeated string filter_tags = 4;
}

// End of protos/perfetto/config/android/android_log_config.proto

// Begin of protos/perfetto/config/chrome/chrome_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

message ChromeConfig {
  optional string trace_config = 1;

  // When enabled, the data source should only fill in fields in the output that
  // are not potentially privacy sensitive.
  optional bool privacy_filtering_enabled = 2;
}

// End of protos/perfetto/config/chrome/chrome_config.proto

// Begin of protos/perfetto/config/data_source_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

// The configuration that is passed to each data source when starting tracing.
message DataSourceConfig {
  // Data source unique name, e.g., "linux.ftrace". This must match
  // the name passed by the data source when it registers (see
  // RegisterDataSource()).
  optional string name = 1;

  // The index of the logging buffer where TracePacket(s) will be stored.
  // This field doesn't make a major difference for the Producer(s). The final
  // logging buffers, in fact, are completely owned by the Service. We just ask
  // the Producer to copy this number into the chunk headers it emits, so that
  // the Service can quickly identify the buffer where to move the chunks into
  // without expensive lookups on its fastpath.
  optional uint32 target_buffer = 2;

  // Set by the service to indicate the duration of the trace.
  // DO NOT SET in consumer as this will be overridden by the service.
  optional uint32 trace_duration_ms = 3;

  // Set by the service to indicate whether this tracing session has extra
  // guardrails.
  // DO NOT SET in consumer as this will be overridden by the service.
  optional bool enable_extra_guardrails = 6;

  // Set by the service to indicate which tracing session the data source
  // belongs to. The intended use case for this is checking if two data sources,
  // one of which produces metadata for the other one, belong to the same trace
  // session and hence should be linked together.
  // This field was introduced in Aug 2018 after Android P.
  optional uint64 tracing_session_id = 4;

  // Keeep the lower IDs (up to 99) for fields that are *not* specific to
  // data-sources and needs to be processed by the traced daemon.

  optional FtraceConfig ftrace_config = 100;
  optional ChromeConfig chrome_config = 101;
  optional InodeFileConfig inode_file_config = 102;
  optional ProcessStatsConfig process_stats_config = 103;
  optional SysStatsConfig sys_stats_config = 104;
  optional HeapprofdConfig heapprofd_config = 105;
  optional AndroidPowerConfig android_power_config = 106;
  optional AndroidLogConfig android_log_config = 107;

  // This is a fallback mechanism to send a free-form text config to the
  // producer. In theory this should never be needed. All the code that
  // is part of the platform (i.e. traced service) is supposed to *not* truncate
  // the trace config proto and propagate unknown fields. However, if anything
  // in the pipeline (client or backend) ends up breaking this forward compat
  // plan, this field will become the escape hatch to allow future data sources
  // to get some meaningful configuration.
  optional string legacy_config = 1000;

  // This field is only used for testing.
  optional TestConfig for_testing =
      268435455;  // 2^28 - 1, max field id for protos supported by Java.
}

// End of protos/perfetto/config/data_source_config.proto

// Begin of protos/perfetto/config/ftrace/ftrace_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

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;
}

// End of protos/perfetto/config/ftrace/ftrace_config.proto

// Begin of protos/perfetto/config/inode_file/inode_file_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

message InodeFileConfig {
  message MountPointMappingEntry {
    optional string mountpoint = 1;
    repeated string scan_roots = 2;
  }

  // How long to pause between batches.
  optional uint32 scan_interval_ms = 1;

  // How long to wait before the first scan in order to accumulate inodes.
  optional uint32 scan_delay_ms = 2;

  // How many inodes to scan in one batch.
  optional uint32 scan_batch_size = 3;

  // Do not scan for inodes not found in the static map.
  optional bool do_not_scan = 4;

  // If non-empty, only scan inodes corresponding to block devices named in
  // this list.
  repeated string scan_mount_points = 5;

  // When encountering an inode belonging to a block device corresponding
  // to one of the mount points in this map, scan its scan_roots instead.
  repeated MountPointMappingEntry mount_point_mapping = 6;
}

// End of protos/perfetto/config/inode_file/inode_file_config.proto

// Begin of protos/perfetto/config/power/android_power_config.proto

message AndroidPowerConfig {
  enum BatteryCounters {
    BATTERY_COUNTER_UNSPECIFIED = 0;
    BATTERY_COUNTER_CHARGE = 1;            // Coulomb counter.
    BATTERY_COUNTER_CAPACITY_PERCENT = 2;  // Charge (%).
    BATTERY_COUNTER_CURRENT = 3;           // Instantaneous current.
    BATTERY_COUNTER_CURRENT_AVG = 4;       // Avg current.
  }
  optional uint32 battery_poll_ms = 1;
  repeated BatteryCounters battery_counters = 2;

  // Where available enables per-power-rail measurements.
  optional bool collect_power_rails = 3;
}

// End of protos/perfetto/config/power/android_power_config.proto

// Begin of protos/perfetto/config/process_stats/process_stats_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

message ProcessStatsConfig {
  enum Quirks {
    QUIRKS_UNSPECIFIED = 0;

    // This has been deprecated and ignored as per 2018-05-01. Full scan at
    // startup is now disabled by default and can be re-enabled using the
    // |scan_all_processes_on_start| arg.
    DISABLE_INITIAL_DUMP = 1 [deprecated = true];

    DISABLE_ON_DEMAND = 2;
  }

  repeated Quirks quirks = 1;

  // If enabled all processes will be scanned and dumped when the trace starts.
  optional bool scan_all_processes_on_start = 2;

  // If enabled thread names are also recoded (this is redundant if sched_switch
  // is enabled).
  optional bool record_thread_names = 3;

  // If > 0 samples counters (see process_stats.proto) from
  // /proc/pid/status and oom_score_adj every X ms.
  // This is required to be > 100ms to avoid excessive CPU usage.
  // TODO(primiano): add CPU cost for change this value.
  optional uint32 proc_stats_poll_ms = 4;

  // If empty samples stats for all processes. If non empty samples stats only
  // for processes matching the given string in their argv0 (i.e. the first
  // entry of /proc/pid/cmdline).
  // TODO(primiano): implement this feature.
  // repeated string proc_stats_filter = 5;

  // This is required to be either = 0 or a multiple of |proc_stats_poll_ms|
  // (default: |proc_stats_poll_ms|). If = 0, will be set to
  // |proc_stats_poll_ms|. Non-multiples will be rounded down to the nearest
  // multiple.
  optional uint32 proc_stats_cache_ttl_ms = 6;
}

// End of protos/perfetto/config/process_stats/process_stats_config.proto

// Begin of protos/perfetto/config/sys_stats/sys_stats_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

// This file defines the configuration for the Linux /proc poller data source,
// which injects counters in the trace.
// Counters that are needed in the trace must be explicitly listed in the
// *_counters fields. This is to avoid spamming the trace with all counters
// at all times.
// The sampling rate is configurable. All polling rates (*_period_ms) need
// to be integer multiples of each other.
// OK:     [10ms, 10ms, 10ms],  [10ms, 20ms, 10ms],  [10ms, 20ms, 60ms]
// Not OK: [10ms, 10ms, 11ms],  [10ms, 15ms, 20ms]
message SysStatsConfig {
  // Polls /proc/meminfo every X ms, if non-zero.
  // This is required to be > 10ms to avoid excessive CPU usage.
  // Cost: 0.3 ms [read] + 0.07 ms [parse + trace injection]
  optional uint32 meminfo_period_ms = 1;

  // Only the counters specified below are reported.
  repeated MeminfoCounters meminfo_counters = 2;

  // Polls /proc/vmstat every X ms, if non-zero.
  // This is required to be > 10ms to avoid excessive CPU usage.
  // Cost: 0.2 ms [read] + 0.3 ms [parse + trace injection]
  optional uint32 vmstat_period_ms = 3;
  repeated VmstatCounters vmstat_counters = 4;

  // Pols /proc/stat every X ms, if non-zero.
  // This is required to be > 10ms to avoid excessive CPU usage.
  // Cost: 4.1 ms [read] + 1.9 ms [parse + trace injection]
  optional uint32 stat_period_ms = 5;
  enum StatCounters {
    STAT_UNSPECIFIED = 0;
    STAT_CPU_TIMES = 1;
    STAT_IRQ_COUNTS = 2;
    STAT_SOFTIRQ_COUNTS = 3;
    STAT_FORK_COUNT = 4;
  }
  repeated StatCounters stat_counters = 6;
}

// End of protos/perfetto/config/sys_stats/sys_stats_config.proto

// Begin of protos/perfetto/config/test_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

// The configuration for a fake producer used in tests.
message TestConfig {
  message DummyFields {
    optional uint32 field_uint32 = 1;
    optional int32 field_int32 = 2;
    optional uint64 field_uint64 = 3;
    optional int64 field_int64 = 4;
    optional fixed64 field_fixed64 = 5;
    optional sfixed64 field_sfixed64 = 6;
    optional fixed32 field_fixed32 = 7;
    optional sfixed32 field_sfixed32 = 8;
    optional double field_double = 9;
    optional float field_float = 10;
    optional sint64 field_sint64 = 11;
    optional sint32 field_sint32 = 12;
    optional string field_string = 13;
    optional bytes field_bytes = 14;
  }

  // The number of messages the fake producer should send.
  optional uint32 message_count = 1;

  // The maximum number of messages which should be sent each second.
  // The actual obserced speed may be lower if the producer is unable to
  // work fast enough.
  // If this is zero or unset, the producer will send as fast as possible.
  optional uint32 max_messages_per_second = 2;

  // The seed value for a simple multiplicative congruential pseudo-random
  // number sequence.
  optional uint32 seed = 3;

  // The size of each message in bytes. Should be greater than or equal 5 to
  // account for the number of bytes needed to encode the random number and a
  // null byte for the string.
  optional uint32 message_size = 4;

  // Whether the producer should send a event batch when the data source is
  // is initially registered.
  optional bool send_batch_on_register = 5;

  optional DummyFields dummy_fields = 6;
}

// End of protos/perfetto/config/test_config.proto

// Begin of protos/perfetto/config/trace_config.proto

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

// The overall config that is used when starting a new tracing session through
// ProducerPort::StartTracing().
// It contains the general config for the logging buffer(s) and the configs for
// all the data source being enabled.
//
// Next id: 18.
message TraceConfig {
  message BufferConfig {
    optional uint32 size_kb = 1;

    reserved 2;  // |page_size|, now deprecated.
    reserved 3;  // |optimize_for|, now deprecated.

    enum FillPolicy {
      UNSPECIFIED = 0;

      // Default behavior. The buffer operates as a conventional ring buffer.
      // If the writer is faster than the reader (or if the reader reads only
      // after tracing is stopped) newly written packets will overwrite old
      // packets.
      RING_BUFFER = 1;

      // Behaves like RING_BUFFER as long as there is space in the buffer or
      // the reader catches up with the writer. As soon as the writer hits
      // an unread chunk, it stops accepting new data in the buffer.
      DISCARD = 2;
    }
    optional FillPolicy fill_policy = 4;
  }
  repeated BufferConfig buffers = 1;

  message DataSource {
    // Filters and data-source specific config. It contains also the unique name
    // of the data source, the one passed in the  DataSourceDescriptor when they
    // register on the service.
    optional protos.DataSourceConfig config = 1;

    // Optional. If multiple producers (~processes) expose the same data source
    // and |producer_name_filter| != "", the data source is enabled only for
    // producers whose names match any of the producer_name_filter below.
    // The |producer_name_filter| has to be an exact match. (TODO(primiano):
    // support wildcards or regex).
    // This allows to enable a data source only for specific processes.
    // The "repeated" field has OR sematics: specifying a filter ["foo", "bar"]
    // will enable data source on both "foo" and "bar" (if existent).
    repeated string producer_name_filter = 2;
  }
  repeated DataSource data_sources = 2;

  // If specified, the trace will be stopped |duration_ms| after starting.
  // However in case of traces with triggers, see
  // TriggerConfig.trigger_timeout_ms instead.
  optional uint32 duration_ms = 3;

  // This is set when --dropbox is passed to the Perfetto command line client
  // and enables guardrails that limit resource usage for traces requested
  // by statsd.
  optional bool enable_extra_guardrails = 4;

  enum LockdownModeOperation {
    LOCKDOWN_UNCHANGED = 0;
    LOCKDOWN_CLEAR = 1;
    LOCKDOWN_SET = 2;
  }
  // Reject producers that are not running under the same UID as the tracing
  // service.
  optional LockdownModeOperation lockdown_mode = 5;

  message ProducerConfig {
    // Identifies the producer for which this config is for.
    optional string producer_name = 1;

    // Specifies the preferred size of the shared memory buffer. If the size is
    // larger than the max size, the max will be used. If it is smaller than
    // the page size or doesn't fit pages evenly into it, it will fall back to
    // the size specified by the producer or finally the default shared memory
    // size.
    optional uint32 shm_size_kb = 2;

    // Specifies the preferred size of each page in the shared memory buffer.
    // Must be an integer multiple of 4K.
    optional uint32 page_size_kb = 3;
  }

  repeated ProducerConfig producers = 6;

  // Contains statsd-specific metadata about an alert associated with the trace.
  message StatsdMetadata {
    // The identifier of the alert which triggered this trace.
    optional int64 triggering_alert_id = 1;
    // The uid which registered the triggering configuration with statsd.
    optional int32 triggering_config_uid = 2;
    // The identifier of the config which triggered the alert.
    optional int64 triggering_config_id = 3;
    // The identifier of the subscription which triggered this trace.
    optional int64 triggering_subscription_id = 4;
  }

  // Statsd-specific metadata.
  optional StatsdMetadata statsd_metadata = 7;

  // When true, the EnableTracing() request must also provide a file descriptor.
  // The service will then periodically read packets out of the trace buffer and
  // store it into the passed file.
  optional bool write_into_file = 8;

  // Optional. If non-zero tunes the write period. A min value of 100ms is
  // enforced (i.e. smaller values are ignored).
  optional uint32 file_write_period_ms = 9;

  // Optional. When non zero the periodic write stops once at most X bytes
  // have been written into the file. Tracing is disabled when this limit is
  // reached, even if |duration_ms| has not been reached yet.
  optional uint64 max_file_size_bytes = 10;

  // Contains flags which override the default values of the guardrails inside
  // Perfetto. These values are only affect userdebug builds.
  message GuardrailOverrides {
    // Override the default limit (in bytes) for uploading data to server within
    // a 24 hour period.
    optional uint64 max_upload_per_day_bytes = 1;
  }

  optional GuardrailOverrides guardrail_overrides = 11;

  // When true, data sources are not started until an explicit call to
  // StartTracing() on the consumer port. This is to support early
  // initialization and fast trace triggering. This can be used only when the
  // Consumer explicitly triggers the StartTracing() method.
  // This should not be used in a remote trace config via statsd, doing so will
  // result in a hung trace session.
  optional bool deferred_start = 12;

  // When set, it periodically issues a Flush() to all data source, forcing them
  // to commit their data into the tracing service. This can be used for
  // quasi-real-time streaming mode and to guarantee some partial ordering of
  // events in the trace in windows of X ms.
  optional uint32 flush_period_ms = 13;

  // Wait for this long for producers to acknowledge flush requests.
  // Default 5s.
  optional uint32 flush_timeout_ms = 14;

  // Disable emitting clock timestamps into the trace.
  optional bool disable_clock_snapshotting = 15;

  // Android-only. If set, sends an intent to the Traceur system app when the
  // trace ends to notify it about the trace readiness.
  optional bool notify_traceur = 16;

  // Triggers allow producers to start or stop the tracing session when an event
  // occurs.
  //
  // For example if we are tracing probabilistically, most traces will be
  // uninteresting. Triggers allow us to keep only the interesting ones such as
  // those traces during which the device temperature reached a certain
  // threshold. In this case the producer can activate a trigger to keep
  // (STOP_TRACING) the trace, otherwise it can also begin a trace
  // (START_TRACING) because it knows something is about to happen.
  message TriggerConfig {
    enum TriggerMode {
      UNSPECIFIED = 0;

      // When this mode is chosen, data sources are not started until one of the
      // |triggers| are received. This supports early initialization and fast
      // starting of the tracing system. On triggering, the session will then
      // record for |stop_delay_ms|. However if no trigger is seen
      // after |trigger_timeout_ms| the session will be stopped and no data will
      // be returned.
      START_TRACING = 1;

      // When this mode is chosen, the session will be started via the normal
      // EnableTracing() & StartTracing(). If no trigger is ever seen
      // the session will be stopped after |trigger_timeout_ms| and no data will
      // be returned. However if triggered the trace will stop after
      // |stop_delay_ms| and any data in the buffer will be returned to the
      // consumer.
      STOP_TRACING = 2;
    }
    optional TriggerMode trigger_mode = 1;

    message Trigger {
      // The producer must specify this name to activate the trigger.
      optional string name = 1;

      // The a std::regex that will match the producer that can activate this
      // trigger. This is optional. If unset any producers can activate this
      // trigger.
      optional string producer_name_regex = 2;

      // After a trigger is received either in START_TRACING or STOP_TRACING
      // mode then the trace will end |stop_delay_ms| after triggering.
      optional uint32 stop_delay_ms = 3;
    }
    // A list of triggers which are related to this configuration. If ANY
    // trigger is seen then an action will be performed based on |trigger_mode|.
    repeated Trigger triggers = 2;

    // Required and must be positive if a TriggerConfig is specified. This is
    // how long this TraceConfig should wait for a trigger to arrive. After this
    // period of time if no trigger is seen the TracingSession will be cleaned
    // up.
    optional uint32 trigger_timeout_ms = 3;
  }
  optional TriggerConfig trigger_config = 17;
}

// End of protos/perfetto/config/trace_config.proto

// Begin of protos/perfetto/config/profiling/heapprofd_config.proto

// Configuration for go/heapprofd.
message HeapprofdConfig {
  message ContinuousDumpConfig {
    // ms to wait before first dump.
    optional uint32 dump_phase_ms = 5;
    // ms to wait between following dumps.
    optional uint32 dump_interval_ms = 6;
  };

  // Set to 1 for perfect accuracy.
  // Otherwise, sample every sample_interval_bytes on average.
  // TODO(fmayer): Add link to docs elaborating on this.
  optional uint64 sampling_interval_bytes = 1;

  // E.g. surfaceflinger, com.android.phone
  // This input is normalized in the following way: if it contains slashes,
  // everything up to the last slash is discarded. If it contains "@",
  // everything after the first @ is discared.
  // E.g. /system/bin/surfaceflinger@1.0 normalizes to surfaceflinger.
  // This transformation is also applied to the processes' command lines when
  // matching.
  repeated string process_cmdline = 2;

  // For watermark based triggering or local debugging.
  repeated uint64 pid = 4;
  optional bool all = 5;
  // Do not emit function names for mappings starting with this prefix.
  // E.g. /system to not emit symbols for any system libraries.
  repeated string skip_symbol_prefix = 7;

  // Dump once at the end of the trace, emitting the heap dump at maximum
  // memory usage.
  // optional bool retain_max = 5;  // TODO(fmayer): Implement

  // Dump at a predefined interval.
  optional ContinuousDumpConfig continuous_dump_config = 6;

  // Size of the shared memory buffer between the profiled processes and
  // heapprofd. Defaults to 8 MiB. If larger than 500 MiB, truncated to 500
  // MiB.
  optional uint64 shmem_size_bytes = 8;
}

// End of protos/perfetto/config/profiling/heapprofd_config.proto