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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package perfetto.protos;
// A snapshot of clock readings to allow for trace alignment.
message ClockSnapshot {
message Clock {
enum BuiltinClocks {
UNKNOWN = 0;
REALTIME = 1;
REALTIME_COARSE = 2;
MONOTONIC = 3;
MONOTONIC_COARSE = 4;
MONOTONIC_RAW = 5;
BOOTTIME = 6;
PROCESS_CPUTIME = 7;
THREAD_CPUTIME = 8;
BUILTIN_CLOCK_MAX_ID = 63;
}
// Clock IDs have the following semantic:
// [1, 63]: Builtin types, see BuiltinClocks above.
// [64, 127]: User-defined clocks. These clocks are sequence-scoped. They
// are only valid within the same |trusted_packet_sequence_id|
// (i.e. only for TracePacket(s) emitted by the same TraceWriter
// that emitted the clock snapshot).
// [128, MAX]: Reserved for future use. The idea is to allow global clock
// IDs and setting this ID to hash(full_clock_name) & ~127.
optional uint32 clock_id = 1;
// Unit is ns unless specified otherwise by the resolution_* fields below.
optional uint64 timestamp = 2;
// TODO(eseckler): the fields below and sequence-scoped clock IDs are not
// supported yet by the trace processor.
// When true the timestamp should be interpreted as a delta from the last
// TracePacket's timestamp emitted by the same packet_sequence_id.
// The first packet timestamp after a ClockSnapshot is relative to the last
// ClockSnapshot seen on the packet sequence.
// optional bool is_incremental = 3;
// Allows to specify a custom unit different than the default (ns)
// for this clock domain. A multiplier of 1000 means that a timestamp = 3
// should be interpreted as 3000 ns = 3 us.
// optional uint64 unit_multiplier_ns = 4;
}
repeated Clock clocks = 1;
}
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