path: root/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/gpu_counter_descriptor.proto

// Description of GPU counters.
// This message is sent by a GPU counter producer to specify the counters
// available in the hardware.
message GpuCounterDescriptor {
  // Logical groups for a counter.  This is used in the UI to present the
  // related counters together.
  enum GpuCounterGroup {
    UNCLASSIFIED = 0;
    SYSTEM = 1;
    VERTICES = 2;
    FRAGMENTS = 3;
    PRIMITIVES = 4;
    MEMORY = 5;  // Includes counters relating to caching and bandwidth.
    COMPUTE = 6;
  }

  message GpuCounterSpec {
    optional uint32 counter_id = 1;
    optional string name = 2;
    optional string description = 3;
    reserved 4;  // MeasureUnit unit (deprecated)
    oneof peak_value {
      int64 int_peak_value = 5;
      double double_peak_value = 6;
    }
    repeated MeasureUnit numerator_units = 7;
    repeated MeasureUnit denominator_units = 8;
    optional bool select_by_default = 9;
    repeated GpuCounterGroup groups = 10;
  }
  repeated GpuCounterSpec specs = 1;

  // Allow producer to group counters into block to represent counter islands.
  // A capacity may be specified to indicate the number of counters that can be
  // enable simultaneously in that block.
  message GpuCounterBlock {
    // required. Unique ID for the counter group.
    optional uint32 block_id = 1;
    // optional. Number of counters supported by the block. No limit if unset.
    optional uint32 block_capacity = 2;
    // optional. Name of block.
    optional string name = 3;
    // optional. Description for the block.
    optional string description = 4;
    // list of counters that are part of the block.
    repeated uint32 counter_ids = 5;
  }
  repeated GpuCounterBlock blocks = 2;

  // optional.  Minimum sampling period supported by the producer in
  // nanoseconds.
  optional uint64 min_sampling_period_ns = 3;

  // optional.  Maximum sampling period supported by the producer in
  // nanoseconds.
  optional uint64 max_sampling_period_ns = 4;

  // optional.  The producer supports counter sampling by instrumenting the
  // command buffer.
  optional bool supports_instrumented_sampling = 5;

  // next id: 41
  enum MeasureUnit {
    NONE = 0;

    BIT = 1;
    KILOBIT = 2;
    MEGABIT = 3;
    GIGABIT = 4;
    TERABIT = 5;
    PETABIT = 6;

    BYTE = 7;
    KILOBYTE = 8;
    MEGABYTE = 9;
    GIGABYTE = 10;
    TERABYTE = 11;
    PETABYTE = 12;

    HERTZ = 13;
    KILOHERTZ = 14;
    MEGAHERTZ = 15;
    GIGAHERTZ = 16;
    TERAHERTZ = 17;
    PETAHERTZ = 18;

    NANOSECOND = 19;
    MICROSECOND = 20;
    MILLISECOND = 21;
    SECOND = 22;
    MINUTE = 23;
    HOUR = 24;

    VERTEX = 25;
    PIXEL = 26;
    TRIANGLE = 27;
    PRIMITIVE = 38;
    FRAGMENT = 39;

    MILLIWATT = 28;
    WATT = 29;
    KILOWATT = 30;

    JOULE = 31;
    VOLT = 32;
    AMPERE = 33;

    CELSIUS = 34;
    FAHRENHEIT = 35;
    KELVIN = 36;

    // Values should be out of 100.
    PERCENT = 37;

    INSTRUCTION = 40;
  }
}

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

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

message TrackEventCategory {
  optional string name = 1;
  optional string description = 2;
  repeated string tags = 3;
}

message TrackEventDescriptor {
  repeated TrackEventCategory available_categories = 1;
}

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

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

// This message is sent from Producer(s) to the tracing Service when registering
// to advertise their capabilities. It describes the structure of tracing
// protos that will be produced by the data source and the supported filters.
message DataSourceDescriptor {
  optional string name = 1;  // e.g., "linux.ftrace", "chromium.tracing"

  // When true the data source is expected to ack the stop request through the
  // NotifyDataSourceStopped() IPC. This field has been introduced after
  // Android P in Jul 2018 and is not supported on older versions.
  optional bool will_notify_on_stop = 2;

  // When true the data source is expected to ack the start request through the
  // NotifyDataSourceStarted() IPC. This field has been introduced after
  // Android P in March 2019 and is not supported on older versions.
  optional bool will_notify_on_start = 3;

  // If true, opt into receiving the ClearIncrementalState() IPC. This should be
  // set if the data source writes packets that refer to previous trace
  // contents, and knows how to stop referring to the already-emitted data.
  optional bool handles_incremental_state_clear = 4;

  // Optional specification about available GPU counters.
  optional GpuCounterDescriptor gpu_counter_descriptor = 5 [lazy = true];

  optional TrackEventDescriptor track_event_descriptor = 6 [lazy = true];
}

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

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

// Reports the state of the tracing service. Used to gather details about the
// data sources connected.
// See ConsumerPort::QueryServiceState().
message TracingServiceState {
  // Describes a producer process.
  message Producer {
    optional int32 id = 1;     // Unique ID of the producer (monotonic counter).
    optional string name = 2;  // Typically matches the process name.
    optional int32 uid = 3;    // Unix uid of the remote process.
  }

  // Describes a data source registered by a producer. Data sources are listed
  // regardless of the fact that they are being used or not.
  message DataSource {
    // Descriptor passed by the data source when calling RegisterDataSource().
    optional DataSourceDescriptor ds_descriptor = 1;

    // ID of the producer, as per Producer.id.
    optional int32 producer_id = 2;
  }

  // Lists all the producers connected.
  repeated Producer producers = 1;

  // Lists the data sources available.
  repeated DataSource data_sources = 2;

  // Total number of tracing sessions.
  optional int32 num_sessions = 3;

  // Number of tracing sessions in the started state. Always <= num_sessions.
  optional int32 num_sessions_started = 4;
}

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

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

enum BuiltinClock {
  BUILTIN_CLOCK_UNKNOWN = 0;
  BUILTIN_CLOCK_REALTIME = 1;
  BUILTIN_CLOCK_REALTIME_COARSE = 2;
  BUILTIN_CLOCK_MONOTONIC = 3;
  BUILTIN_CLOCK_MONOTONIC_COARSE = 4;
  BUILTIN_CLOCK_MONOTONIC_RAW = 5;
  BUILTIN_CLOCK_BOOTTIME = 6;
  BUILTIN_CLOCK_MAX_ID = 63;

  reserved 7, 8;
}

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

// 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/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/android/android_polled_state_config.proto

// Data source that polls for display state.
message AndroidPolledStateConfig {
  // Frequency of polling. If absent the state will be recorded once, at the
  // start of the trace.
  // This is required to be > 100ms to avoid excessive CPU usage.
  optional uint32 poll_ms = 1;
}

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

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

// Data source that lists details (such as version code) about packages on an
// Android device.
message PackagesListConfig {
  // If not empty, emit info about only the following list of package names
  // (exact match, no regex). Otherwise, emit info about all packages.
  repeated string package_name_filter = 1;
}

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

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

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/ftrace/ftrace_config.proto

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;
}

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

// Begin of protos/perfetto/config/gpu/gpu_counter_config.proto

message GpuCounterConfig {
  // Desired sampling interval for counters.
  optional uint64 counter_period_ns = 1;

  // List of counters to be sampled. Counter IDs correspond to the ones
  // described in GpuCounterSpec in the data source descriptor.
  repeated uint32 counter_ids = 2;

  // Sample counters by instrumenting command buffers.
  optional bool instrumented_sampling = 3;

  // Fix gpu clock rate during trace session.
  optional bool fix_gpu_clock = 4;
}

// End of protos/perfetto/config/gpu/gpu_counter_config.proto

// Begin of protos/perfetto/config/gpu/vulkan_memory_config.proto

message VulkanMemoryConfig {
  // Tracking driver memory usage events
  optional bool track_driver_memory_usage = 1;

  // Tracking device memory usage events
  optional bool track_device_memory_usage = 2;
}

// End of protos/perfetto/config/gpu/vulkan_memory_config.proto

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

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

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;

  // Whether to record /proc/tid/time_in_state.
  optional bool record_thread_time_in_state = 7;

  // Size of the cache for thread time_in_state cpu freq values.
  // If not specificed, the default is used.
  optional uint32 thread_time_in_state_cache_size = 8;
}

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

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

// Configuration for go/heapprofd.
// Next id: 19
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.
  //
  // See https://docs.perfetto.dev/#/heapprofd?id=sampling-interval for more
  // details.
  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;

  // Profile all processes eligible for profiling on the system.
  // See https://docs.perfetto.dev/#/heapprofd?id=target-processes for which
  // processes are eligible.
  //
  // On unmodified userdebug builds, this will lead to system crashes. Zygote
  // will crash when trying to launch a new process as it will have an
  // unexpected open socket to heapprofd.
  //
  // heapprofd will likely be overloaded by the amount of data for low
  // sampling intervals.
  optional bool all = 5;

  // Do not profile processes whose anon RSS + swap < given value.
  // Introduced in Android 11.
  optional uint32 min_anonymous_memory_kb = 15;

  // Stop profile if heapprofd memory usage goes beyond the given value.
  // Introduced in Android 11.
  optional uint32 max_heapprofd_memory_kb = 16;

  // Stop profile if heapprofd CPU time since start of this data-source
  // goes beyond given value.
  // Introduced in Android 11.
  optional uint64 max_heapprofd_cpu_secs = 17;

  // 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 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.
  //
  // Needs to be:
  // * at least 8192,
  // * a power of two,
  // * a multiple of 4096.
  optional uint64 shmem_size_bytes = 8;

  // When the shmem buffer is full, block the client instead of ending the
  // trace. Use with caution as this will significantly slow down the target
  // process.
  optional bool block_client = 9;

  // If set, stop the trace session after blocking the client for this
  // timeout. Needs to be larger than 100 us, otherwise no retries are done.
  // Introduced in Android 11.
  optional uint32 block_client_timeout_us = 14;

  // Do not profile processes from startup, only match already running
  // processes.
  //
  // Can not be set at the same time as no_running.
  // Introduced in Android 11.
  optional bool no_startup = 10;

  // Do not profile running processes. Only match processes on startup.
  //
  // Can not be set at the same time as no_startup.
  // Introduced in Android 11.
  optional bool no_running = 11;

  // Gather information on how many bytes of allocations are on non-referenced
  // pages. The way to use this generally is:
  // 1. Start profile of app.
  // 2. Start app.
  // 3. Trigger a dump by sending SIGUSR1 to heapprofd.
  // 4. Do operations.
  // 5. End profile.
  //
  // You can then find the allocations that were not used for the operations you
  // did in step 4.
  optional bool idle_allocations = 12;

  // Cause heapprofd to emit a single dump at the end, showing the memory usage
  // at the point in time when the sampled heap usage of the process was at its
  // maximum. This causes ProfilePacket.HeapSample.self_max to be set, and
  // self_allocated and self_freed to not be set.
  // Introduced in Android 11.
  optional bool dump_at_max = 13;

  // FEATURE FLAGS. THERE BE DRAGONS.

  // Escape hatch if the session is being torn down because of a forked child
  // that shares memory space, but is not correctly identified as a vforked
  // child.
  // Introduced in Android 11.
  optional bool disable_fork_teardown = 18;

  // We try to automatically detect when a target applicatation vforks but then
  // does a memory allocation (or free). This auto-detection can be disabled
  // with this.
  // Introduced in Android 11.
  optional bool disable_vfork_detection = 19;
}

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

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

// Configuration for go/heapprofd.
message JavaHprofConfig {
  // If dump_interval_ms != 0, the following configuration is used.
  message ContinuousDumpConfig {
    // ms to wait before first continuous dump.
    // A dump is always created at the beginning of the trace.
    optional uint32 dump_phase_ms = 1;
    // ms to wait between following dumps.
    optional uint32 dump_interval_ms = 2;
  }

  // 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 = 1;

  // For watermark based triggering or local debugging.
  repeated uint64 pid = 2;

  // Dump at a predefined interval.
  optional ContinuousDumpConfig continuous_dump_config = 3;

  // Do not profile processes whose anon RSS + swap < given value.
  optional uint32 min_anonymous_memory_kb = 4;

  // Include the process' /proc/self/smaps.
  // This only shows maps that:
  // * start with /system
  // * start with /vendor
  // * start with /data/app
  // * contain "extracted in memory from Y", where Y matches any of the above
  optional bool dump_smaps = 5;
}

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

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

// Configuration for the traced_perf profiler.
//
// At the time of writing, the config options are restricted to the periodic
// system-wide stack sampling use-case (|all_cpus| must be true).
message PerfEventConfig {
  // If true, sample events on all CPUs.
  optional bool all_cpus = 1;

  // Per-cpu sampling frequency (requested from the kernel). Not guaranteed to
  // be honored as the kernel can throttle the sampling rate if it's too high.
  // If unset, an implementation-defined default is used.
  optional uint32 sampling_frequency = 2;

  // How often the per-cpu ring buffers are read by the producer.
  // If unset, an implementation-defined default is used.
  optional uint32 ring_buffer_read_period_ms = 8;

  // Size (in 4k pages) of each per-cpu ring buffer that is filled by the
  // kernel. If set, must be a power of two.
  // If unset, an implementation-defined default is used.
  optional uint32 ring_buffer_pages = 3;

  // Process ID (TGID) whitelist. If this list is not empty, only matching
  // samples will be retained. If multiple whitelists and blacklists are
  // specified by the config, then all of them are evaluated for each sampled
  // process.
  repeated int32 target_pid = 4;

  // Command line whitelist, matched against the
  // /proc/<pid>/cmdline (not the comm string), with both sides being
  // "normalized". Normalization is as follows: (1) trim everything beyond the
  // first null or "@" byte; (2) if the string contains forward slashes, trim
  // everything up to and including the last one.
  repeated string target_cmdline = 5;

  // PID blacklist.
  repeated int32 exclude_pid = 6;

  // Command line blacklist. Normalized in the same way as |target_cmdline|.
  repeated string exclude_cmdline = 7;

  ////////////////////
  // Uncommon options:

  // Timeout for the remote /proc/<pid>/{maps,mem} file descriptors for a
  // sampled process. This is primarily for Android, where this lookup is
  // asynchronous. As long as the producer is waiting, the associated samples
  // will be kept enqueued (putting pressure on the capacity of the shared
  // unwinding queue). Once a lookup for a process expires, all associated
  // samples are discarded. However, if the lookup still succeeds after the
  // timeout, future samples will be handled normally.
  // If unset, an implementation-defined default is used.
  optional uint32 remote_descriptor_timeout_ms = 9;

  // Optional period for clearing state cached by the unwinder. This is a heavy
  // operation that is only necessary for traces that target a wide set of
  // processes, and require the memory footprint to be reset periodically.
  // If unset, the cached state will not be cleared.
  optional uint32 unwind_state_clear_period_ms = 10;
}

// End of protos/perfetto/config/profiling/perf_event_config.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;
  VMSTAT_NR_ZSPAGES = 93;
  VMSTAT_NR_ION_HEAP = 94;
  VMSTAT_NR_GPU_HEAP = 95;
}
// End of protos/perfetto/common/sys_stats_counters.proto

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

// 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;

  // If empty all known counters are reported. Otherwise, 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

// 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/track_event/track_event_config.proto

message TrackEventConfig {
  // The following fields define the set of enabled trace categories. Each list
  // item is a glob.
  //
  // To determine if category is enabled, it is checked against the filters in
  // the following order:
  //
  //   1. Exact matches in enabled categories.
  //   2. Exact matches in enabled tags.
  //   3. Exact matches in disabled categories.
  //   4. Exact matches in disabled tags.
  //   5. Pattern matches in enabled categories.
  //   6. Pattern matches in enabled tags.
  //   7. Pattern matches in disabled categories.
  //   8. Pattern matches in disabled tags.
  //
  // If none of the steps produced a match, the category is enabled by default.
  //
  // Examples:
  //
  //  - To enable all non-slow/debug categories:
  //
  //       No configuration needed, happens by default.
  //
  //  - To enable a specific category:
  //
  //       disabled_categories = ["*"]
  //       enabled_categories = ["my_category"]
  //
  //  - To enable only categories with a specific tag:
  //
  //       disabled_tags = ["*"]
  //       enabled_tags = ["my_tag"]
  //
  repeated string disabled_categories = 1;  // Default: []
  repeated string enabled_categories = 2;   // Default: []
  repeated string disabled_tags = 3;  // Default: [“slow”, “debug”]
  repeated string enabled_tags = 4;   // Default: []
}

// End of protos/perfetto/config/track_event/track_event_config.proto

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

// 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 how long it waits after StopDataSource.
  // DO NOT SET in consumer as this will be overridden by the service.
  optional uint32 stop_timeout_ms = 7;

  // 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.

  // All data source config fields must be marked as [lazy=true]. This prevents
  // the proto-to-cpp generator from recursing into those when generating the
  // cpp classes and polluting tracing/core with data-source-specific classes.
  // Instead they are treated as opaque strings containing raw proto bytes.

  // Data source name: linux.ftrace
  optional FtraceConfig ftrace_config = 100 [lazy = true];
  // Data source name: linux.inode_file_map
  optional InodeFileConfig inode_file_config = 102 [lazy = true];
  // Data source name: linux.process_stats
  optional ProcessStatsConfig process_stats_config = 103 [lazy = true];
  // Data source name: linux.sys_stats
  optional SysStatsConfig sys_stats_config = 104 [lazy = true];
  // Data source name: android.heapprofd
  // Introduced in Android 10.
  optional HeapprofdConfig heapprofd_config = 105 [lazy = true];
  // Data source name: android.java_hprof
  // Introduced in Android 11.
  optional JavaHprofConfig java_hprof_config = 110 [lazy = true];
  // Data source name: android.power
  optional AndroidPowerConfig android_power_config = 106 [lazy = true];
  // Data source name: android.log
  optional AndroidLogConfig android_log_config = 107 [lazy = true];
  // TODO(fmayer): Add data source name for this.
  optional GpuCounterConfig gpu_counter_config = 108 [lazy = true];
  // Data source name: android.packages_list
  optional PackagesListConfig packages_list_config = 109 [lazy = true];
  // Data source name: linux.perf
  optional PerfEventConfig perf_event_config = 111 [lazy = true];
  // Data source name: vulkan.memory_tracker
  optional VulkanMemoryConfig vulkan_memory_config = 112 [lazy = true];
  // Data source name: track_event
  optional TrackEventConfig track_event_config = 113 [lazy = true];
  // Data source name: android.polled_state
  optional AndroidPolledStateConfig android_polled_state_config = 114
      [lazy = true];

  // Chrome is special as it doesn't use the perfetto IPC layer. We want to
  // avoid proto serialization and de-serialization there because that would
  // just add extra hops on top of the Mojo ser/des. Instead we auto-generate a
  // C++ class for it so it can pass around plain C++ objets.
  optional ChromeConfig chrome_config = 101;

  // 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 = 1001;

  reserved 268435455;  // Was |for_testing|. Caused more problems then found.
}

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

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

// 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: 30.
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 either |producer_name_filter| or |producer_name_regex_filter| is set,
    // the data source is enabled only for producers whose names match any of
    // the filters.
    // |producer_name_filter| has to be an exact match, while
    // |producer_name_regex_filter| is a regular expression.
    // This allows to enable a data source only for specific processes.
    // The "repeated" fields have OR semantics: specifying a filter ["foo",
    // "bar"] will enable data sources on both "foo" and "bar" (if they exist).
    repeated string producer_name_filter = 2;
    repeated string producer_name_regex_filter = 3;
  }
  repeated DataSource data_sources = 2;

  // Config for disabling builtin data sources in the tracing service.
  message BuiltinDataSource {
    // Disable emitting clock timestamps into the trace.
    optional bool disable_clock_snapshotting = 1;

    // Disable echoing the original trace config in the trace.
    optional bool disable_trace_config = 2;

    // Disable emitting system info (build fingerprint, cpuinfo, etc).
    optional bool disable_system_info = 3;

    // Disable emitting events for data-source state changes (e.g. the marker
    // for all data sources having ACKed the start of the trace).
    optional bool disable_service_events = 4;

    // The authoritative clock domain for the trace. Defaults to BOOTTIME. See
    // also ClockSnapshot's primary_trace_clock. The configured value is written
    // into the trace as part of the ClockSnapshots emitted by the service.
    // Trace processor will attempt to translate packet/event timestamps from
    // various data sources (and their chosen clock domains) to this domain
    // during import. Added in Android R.
    optional BuiltinClock primary_trace_clock = 5;

    // Time interval in between snapshotting of sync markers, clock snapshots,
    // stats, and other periodic service-emitted events. Note that the service
    // only keeps track of the first and the most recent snapshot until
    // ReadBuffers() is called.
    optional uint32 snapshot_interval_ms = 6;
  }
  optional BuiltinDataSource builtin_data_sources = 20;

  // If specified, the trace will be stopped |duration_ms| after starting.
  // This does *not* count the time the system is suspended, so we will run
  // for duration_ms of system activity, not wall time.
  //
  // 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 && |output_path| is empty, the EnableTracing() request must
  // provide a file descriptor. The service will then periodically read packets
  // out of the trace buffer and store it into the passed file.
  // If |output_path| is not empty no fd should be passed, the service
  // will create a new file and write into that (see comment below).
  optional bool write_into_file = 8;

  // This must point to a non-existing file. If the file exists the service
  // will NOT overwrite and will fail instead as a security precaution.
  // On Android, when this is used with the system traced, the path must be
  // within /data/misc/perfetto-traces/ or the trace will fail.
  // This option has been introduced in Android R. Before R write_into_file
  // can be used only with the "pass a file descriptor over IPC" mode.
  optional string output_path = 29;

  // 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;

  // Wait for this long for producers to acknowledge stop requests.
  // Default 5s.
  optional uint32 data_source_stop_timeout_ms = 23;

  reserved 15;  // |disable_clock_snapshotting| moved.

  // 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;

  // When this is non-empty the perfetto command line tool will ignore the rest
  // of this TraceConfig and instead connect to the perfetto service as a
  // producer and send these triggers, potentially stopping or starting traces
  // that were previous configured to use a TriggerConfig.
  repeated string activate_triggers = 18;

  // Configuration for trace contents that reference earlier trace data. For
  // example, a data source might intern strings, and emit packets containing
  // {interned id : string} pairs. Future packets from that data source can then
  // use the interned ids instead of duplicating the raw string contents. The
  // trace parser will then need to use that interning table to fully interpret
  // the rest of the trace.
  message IncrementalStateConfig {
    // If nonzero, notify eligible data sources to clear their incremental state
    // periodically, with the given period. The notification is sent only to
    // data sources that have |handles_incremental_state_clear| set in their
    // DataSourceDescriptor. The notification requests that the data source
    // stops referring to past trace contents. This is particularly useful when
    // tracing in ring buffer mode, where it is not exceptional to overwrite old
    // trace data.
    //
    // Warning: this time-based global clearing is likely to be removed in the
    // future, to be replaced with a smarter way of sending the notifications
    // only when necessary.
    optional uint32 clear_period_ms = 1;
  }
  optional IncrementalStateConfig incremental_state_config = 21;

  // Additional guardrail used by the Perfetto command line client.
  // On user builds when --dropbox is set perfetto will refuse to trace unless
  // this is also set.
  // Added in Q.
  optional bool allow_user_build_tracing = 19;

  // If set the tracing service will ensure there is at most one tracing session
  // with this key.
  optional string unique_session_name = 22;

  // Compress trace with the given method. Best effort.
  enum CompressionType {
    COMPRESSION_TYPE_UNSPECIFIED = 0;
    COMPRESSION_TYPE_DEFLATE = 1;
  }
  optional CompressionType compression_type = 24;

  // Android-only. Debug builds only. Not for general use. If set, saves a
  // Dropbox trace into an incident. This field is read by perfetto_cmd, rather
  // than the tracing service. All fields are mandatory.
  message IncidentReportConfig {
    optional string destination_package = 1;
    optional string destination_class = 2;
    // Level of filtering in the requested incident. See |Destination| in
    // frameworks/base/core/proto/android/privacy.proto.
    optional int32 privacy_level = 3;
    // If true, do not write the trace into dropbox (i.e. incident only).
    // Otherwise, write to both dropbox and incident.
    optional bool skip_dropbox = 4;
  }
  optional IncidentReportConfig incident_report_config = 25;

  // DEPRECATED. Was trace_uuid, use trace_uuid_msb and trace_uuid_lsb instead.
  reserved 26;
  // An identifier clients can use to tie this trace to other logging.
  // Alternative encoding of trace_uuid as two int64s.
  optional int64 trace_uuid_msb = 27;
  optional int64 trace_uuid_lsb = 28;
}

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