// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
option java_package = "org.chromium.components.metrics";
option java_outer_classname = "PerfDataProtos";
package metrics;
// Stores information from a perf session generated via running:
// "perf record"
//
// See $kernel/tools/perf/design.txt for more details.
// This is a read-only copy of the upstream protobuf; "Next tag:" comments are
// absent.
message PerfDataProto {
// Perf event attribute. Stores the event description.
// This data structure is defined in the linux kernel:
// $kernel/include/uapi/linux/perf_event.h.
message PerfEventAttr {
// Type of the event. Type is an enumeration and can be one of the values
// described at: $kernel/include/linux/perf_event.h.
// Example types are:
// PERF_TYPE_HARDWARE
// PERF_TYPE_SOFTWARE, etc.
optional uint32 type = 1;
// Size of the event data in bytes.
optional uint32 size = 2;
// The config stores the CPU-specific counter information.
optional uint64 config = 3;
// Sample period of the event. Indicates how often the event is
// triggered in terms of # of events. After |sample_period| events, an event
// will be recorded and stored.
optional uint64 sample_period = 4;
// Sample frequency of the event. Indicates how often the event is
// triggered in terms of # per second. The kernel will try to record
// |sample_freq| events per second.
optional uint64 sample_freq = 5;
// Sample type is a bitfield that records attributes of the sample. Example,
// whether an entire callchain was recorded, etc.
optional uint64 sample_type = 6;
// Bitfield that indicates whether reads on the counter will return the
// total time enabled and total time running.
optional uint64 read_format = 7;
// Indicates whether the counter starts off disabled.
optional bool disabled = 8;
// Indicates whether child processes inherit the counter.
optional bool inherit = 9;
// Indicates whether the counter is pinned to a particular CPU.
optional bool pinned = 10;
// Indicates whether this counter's group has exclusive access to the CPU's
// counters.
optional bool exclusive = 11;
// The following bits restrict events to be counted when the CPU is in user,
// kernel, hypervisor or idle modes.
optional bool exclude_user = 12;
optional bool exclude_kernel = 13;
optional bool exclude_hv = 14;
optional bool exclude_idle = 15;
// Indicates whether mmap events should be recorded.
optional bool mmap = 16;
// Indicates whether process comm information should be recorded upon
// process creation.
optional bool comm = 17;
// Indicates that we are in frequency mode, not period mode.
optional bool freq = 18;
// Indicates whether we have per-task counts.
optional bool inherit_stat = 19;
// Indicates whether we enable perf events after an exec() function call.
optional bool enable_on_exec = 20;
// Indicates whether we trace fork/exit.
optional bool task = 21;
// Indicates whether we are using a watermark to wake up.
optional bool watermark = 22;
// CPUs often "skid" when recording events. That means the instruction
// pointer may not be the same as the one that caused the counter overflow.
// Indicates the capabilities of the CPU in terms of recording precise
// instruction pointer.
optional uint32 precise_ip = 23;
// Indicates whether we have non-exec mmap data.
optional bool mmap_data = 24;
// If set, all the event types will have the same sample_type.
optional bool sample_id_all = 25;
// Indicates whether we are counting events from the host (when running a
// VM).
optional bool exclude_host = 26;
// Exclude events that happen on a guest OS.
optional bool exclude_guest = 27;
// Contains the number of events after which we wake up.
optional uint32 wakeup_events = 28;
// Contains the number of bytes after which we wake up.
optional uint32 wakeup_watermark = 29;
// Information about the type of the breakpoint.
optional uint32 bp_type = 30;
// Contains the breakpoint address.
optional uint64 bp_addr = 31;
// This is an extension of config (see above).
optional uint64 config1 = 32;
// The length of the breakpoint data in bytes.
optional uint64 bp_len = 33;
// This is an extension of config (see above).
optional uint64 config2 = 34;
// Contains the type of branch, example: user, kernel, call, return, etc.
optional uint64 branch_sample_type = 35;
}
// Describes a perf.data file attribute.
message PerfFileAttr {
optional PerfEventAttr attr = 1;
// List of perf file attribute ids. Each id describes an event.
repeated uint64 ids = 2;
}
// Protobuf version of the perf_event_type struct found in perf/util/event.h.
// Contains the name of the event (such as "cycles" or "branch-misses") and
// the event id (which is not unique).
message PerfEventType {
// Event id. This is not unique across event types.
// The combination of the event id and the type field in PerfEventAttr is
// unique across event types.
optional uint64 id = 1;
// Event name's md5 prefix.
// The event name string was field 2 and has been intentionally left out.
optional uint64 name_md5_prefix = 3;
}
// This message contains information about a perf sample itself, as opposed to
// a perf event captured by a sample.
message SampleInfo {
// Process ID / thread ID from which this sample was taken.
optional uint32 pid = 1;
optional uint32 tid = 2;
// Time this sample was taken (NOT the same as an event time).
// It is the number of nanoseconds since bootup.
optional uint64 sample_time_ns = 3;
// The ID of the sample's event type (cycles, instructions, etc).
// The event type IDs are defined in PerfFileAttr.
optional uint64 id = 4;
// The CPU on which this sample was taken.
optional uint32 cpu = 5;
}
message CommEvent {
// Process id.
optional uint32 pid = 1;
// Thread id.
optional uint32 tid = 2;
// Comm string's md5 prefix.
// The comm string was field 3 and has been intentionally left out.
optional uint64 comm_md5_prefix = 4;
// Time the sample was taken.
// Deprecated, use |sample_info| instead.
optional uint64 sample_time = 5 [deprecated = true];
// Info about the perf sample containing this event.
optional SampleInfo sample_info = 6;
}
message MMapEvent {
// Process id.
optional uint32 pid = 1;
// Thread id.
optional uint32 tid = 2;
// Start address.
optional uint64 start = 3;
// Length.
optional uint64 len = 4;
// PG Offset.
optional uint64 pgoff = 5;
// Not added from original: fields 9-14.
// Filename's md5 prefix.
// The filename was field 6 and has been intentionally left out.
optional uint64 filename_md5_prefix = 7;
// Root path's md5 prefix. It helps to categorize filenames we could not
// recover by the filename_md5_prefix.
// The root_path was field 15 and has been intentionally left out.
optional uint64 root_path_md5_prefix = 16;
// Info about the perf sample containing this event.
optional SampleInfo sample_info = 8;
}
// The kernel collects the number of events it couldn't send in a stretch and
// when possible sends this number in a PERF_RECORD_LOST event, which is
// stored in LostEvent.
message LostEvent {
// ID of the event which has been lost. This should be an id found in a
// PerfFileAttr.
optional uint64 id = 1;
// Number of events that were lost.
optional uint64 lost = 2;
// Info about the perf sample containing this event.
optional SampleInfo sample_info = 3;
}
message ThrottleEvent {
// Time of throttle event, in nanoseconds since system startup.
optional uint64 time_ns = 1;
// Event ID.
optional uint64 id = 2;
// Stream ID.
optional uint64 stream_id = 3;
// Info about the perf sample containing this event.
optional SampleInfo sample_info = 4;
}
message BranchStackEntry {
// Branch source address.
optional uint64 from_ip = 1;
// Branch destination address.
optional uint64 to_ip = 2;
// Indicates a mispredicted branch.
optional bool mispredicted = 3;
// Indicates a predicted branch.
optional bool predicted = 4;
// Indicates running in a hardware transaction
optional bool in_transaction = 5;
// Indicates aborting a hardware transaction
optional bool abort = 6;
// Cycle count to last branch
optional uint32 cycles = 7;
}
message SampleEvent {
// Instruction pointer.
optional uint64 ip = 1;
// Process id.
optional uint32 pid = 2;
// Thread id.
optional uint32 tid = 3;
// The time after boot when the sample was recorded, in nanoseconds.
optional uint64 sample_time_ns = 4;
// The address of the sample.
optional uint64 addr = 5;
// The id of the sample.
optional uint64 id = 6;
// The stream id of the sample.
optional uint64 stream_id = 7;
// The period of the sample.
optional uint64 period = 8;
// The CPU where the event was recorded.
optional uint32 cpu = 9;
// The raw size of the event in bytes.
optional uint32 raw_size = 10;
// Not added from original: field 18.
// Sample callchain info.
repeated uint64 callchain = 11;
// Branch stack info.
repeated BranchStackEntry branch_stack = 12;
// Not added from original: fields 13 and 14.
// Sample weight for special events.
optional uint64 weight = 15;
// Sample data source flags.
// Possible flag values:
// http://lxr.free-electrons.com/source/include/uapi/linux/perf_event.h#L849
optional uint64 data_src = 16;
// Sample transaction flags for special events.
// Flag fields:
// http://lxr.free-electrons.com/source/include/uapi/linux/perf_event.h#L209
optional uint64 transaction = 17;
// Not added from original: fields 19-25.
}
// ForkEvent is used for both FORK and EXIT events, which have the same data
// format. We don't want to call this "ForkOrExitEvent", in case a separate
// exit event is introduced in the future.
message ForkEvent {
// Forked process ID.
optional uint32 pid = 1;
// Parent process ID.
optional uint32 ppid = 2;
// Forked process thread ID.
optional uint32 tid = 3;
// Parent process thread ID.
optional uint32 ptid = 4;
// Time of fork event in nanoseconds since bootup.
optional uint64 fork_time_ns = 5;
// Info about the perf sample containing this event.
optional SampleInfo sample_info = 11;
}
message EventHeader {
// Type of event.
optional uint32 type = 1;
optional uint32 misc = 2;
// Size of event.
optional uint32 size = 3;
}
message PerfEvent {
optional EventHeader header = 1;
oneof event_type {
MMapEvent mmap_event = 2;
SampleEvent sample_event = 3;
CommEvent comm_event = 4;
// FORK and EXIT events are structurally identical. They only differ by
// the event type. But using two distinct fields allows us to
// differentiate between them without having to check the event type under
// |header|.
ForkEvent fork_event = 5;
ForkEvent exit_event = 9;
LostEvent lost_event = 6;
ThrottleEvent throttle_event = 7;
// Not added from original: fields 8, 11-24.
}
// Time after boot in nanoseconds corresponding to the event.
optional uint64 timestamp = 10;
}
message PerfEventStats {
// Total number of events read from perf data.
optional uint32 num_events_read = 1;
// Total number of various types of events.
optional uint32 num_sample_events = 2;
optional uint32 num_mmap_events = 3;
optional uint32 num_fork_events = 4;
optional uint32 num_exit_events = 5;
// Number of sample events that were successfully mapped by the address
// mapper, a quipper module that is used to obscure addresses and convert
// them to DSO name + offset. Sometimes it fails to process sample events.
// This field allows us to track the success rate of the address mapper.
optional uint32 num_sample_events_mapped = 6;
// Whether address remapping was enabled.
optional bool did_remap = 7;
}
message PerfBuildID {
// Misc field in perf_event_header.
// Indicates whether the file is mapped in kernel mode or user mode.
optional uint32 misc = 1;
// Process ID.
optional uint32 pid = 2;
// Build id. Should always contain kBuildIDArraySize bytes of data.
// perf_reader.h defines kBuildIDArraySize = 20.
optional bytes build_id_hash = 3;
// Filename Md5sum prefix.
// The filename was field 4 and has been intentionally left out.
optional uint64 filename_md5_prefix = 5;
// Not added from original: field 6.
}
message PerfPMUMappingsMetadata {
// Mapping type.
// It is a number the kernel uses to map to PMU devices when initializing
// them. It is used to reconstruct the event type across different machines.
optional uint32 type = 1;
// The mapping name, field 2, has been intentionally left out.
// Mapping name's md5 prefix.
optional uint64 name_md5_prefix = 3;
}
message PerfHybridTopologyMetadata {
// The pmu name, field 1, has been intentionally left out.
// The 16 most significant bytes of the pmu name's md5 prefix.
optional uint64 pmu_name_md5_prefix = 2;
// The string version of cpus, field 3, has been intentionally left out.
// A range of cpu numbers for this pmu.
repeated uint32 cpu_list = 4 [packed = true];
}
repeated PerfFileAttr file_attrs = 1;
repeated PerfEvent events = 2;
repeated PerfEventType event_types = 10;
// Time when quipper generated this perf data / protobuf, given as seconds
// since the epoch.
optional uint64 timestamp_sec = 3;
// Records some stats about the serialized perf events.
optional PerfEventStats stats = 4;
// Not added from original: repeated uint64 metadata_mask = 5;
// Not added from original: optional PerfTracingMetadata tracing_data = 14;
// Build ID metadata.
repeated PerfBuildID build_ids = 7;
// Not added from original: repeated PerfUint32Metadata uint32_metadata = 8;
// Not added from original: repeated PerfUint64Metadata uint64_metadata = 9;
// Not added from original:
// optional PerfCPUTopologyMetadata cpu_topology = 11;
// Not added from original:
// repeated PerfNodeTopologyMetadata numa_topology = 12;
repeated PerfPMUMappingsMetadata pmu_mappings = 15;
// Not added from original: repeated PerfGroupDescMetadata group_desc = 16;
repeated PerfHybridTopologyMetadata hybrid_topology = 17;
message StringMetadata {
message StringAndMd5sumPrefix {
// The string value was field 1 and has been intentionally left out.
// The string value's md5sum prefix.
optional uint64 value_md5_prefix = 2;
}
// Not added from original: optional StringAndMd5sumPrefix hostname = 1;
// Not added from original:
// optional StringAndMd5sumPrefix kernel_version =2;
// Not added from original: optional StringAndMd5sumPrefix perf_version = 3;
// Not added from original: optional StringAndMd5sumPrefix architecture = 4;
// Not added from original:
// optional StringAndMd5sumPrefix cpu_description = 5;
// Not added from original: optional StringAndMd5sumPrefix cpu_id = 6;
// Not added from original:
// repeated StringAndMd5sumPrefix perf_command_line_token = 7;
// The command line stored as a single string.
optional StringAndMd5sumPrefix perf_command_line_whole = 8;
}
// All the string metadata from the perf data file.
optional StringMetadata string_metadata = 13;
}
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