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/*
* Copyright (C) 2021 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.
*/
#include "src/trace_processor/importers/proto/perf_sample_tracker.h"
#include <stdio.h>
#include <cinttypes>
#include "perfetto/ext/base/string_utils.h"
#include "src/trace_processor/importers/common/track_tracker.h"
#include "src/trace_processor/storage/trace_storage.h"
#include "src/trace_processor/types/trace_processor_context.h"
#include "protos/perfetto/common/perf_events.pbzero.h"
#include "protos/perfetto/trace/profiling/profile_packet.pbzero.h"
#include "protos/perfetto/trace/trace_packet_defaults.pbzero.h"
namespace perfetto {
namespace trace_processor {
namespace {
// Follow perf tool naming convention.
const char* StringifyCounter(int32_t counter) {
using protos::pbzero::PerfEvents;
switch (counter) {
// software:
case PerfEvents::SW_CPU_CLOCK:
return "cpu-clock";
case PerfEvents::SW_PAGE_FAULTS:
return "page-faults";
case PerfEvents::SW_TASK_CLOCK:
return "task-clock";
case PerfEvents::SW_CONTEXT_SWITCHES:
return "context-switches";
case PerfEvents::SW_CPU_MIGRATIONS:
return "cpu-migrations";
case PerfEvents::SW_PAGE_FAULTS_MIN:
return "minor-faults";
case PerfEvents::SW_PAGE_FAULTS_MAJ:
return "major-faults";
case PerfEvents::SW_ALIGNMENT_FAULTS:
return "alignment-faults";
case PerfEvents::SW_EMULATION_FAULTS:
return "emulation-faults";
case PerfEvents::SW_DUMMY:
return "dummy";
// hardware:
case PerfEvents::HW_CPU_CYCLES:
return "cpu-cycles";
case PerfEvents::HW_INSTRUCTIONS:
return "instructions";
case PerfEvents::HW_CACHE_REFERENCES:
return "cache-references";
case PerfEvents::HW_CACHE_MISSES:
return "cache-misses";
case PerfEvents::HW_BRANCH_INSTRUCTIONS:
return "branch-instructions";
case PerfEvents::HW_BRANCH_MISSES:
return "branch-misses";
case PerfEvents::HW_BUS_CYCLES:
return "bus-cycles";
case PerfEvents::HW_STALLED_CYCLES_FRONTEND:
return "stalled-cycles-frontend";
case PerfEvents::HW_STALLED_CYCLES_BACKEND:
return "stalled-cycles-backend";
case PerfEvents::HW_REF_CPU_CYCLES:
return "ref-cycles";
default:
break;
}
PERFETTO_DLOG("Unknown PerfEvents::Counter enum value");
return "unknown";
}
StringId InternTimebaseCounterName(
protos::pbzero::TracePacketDefaults::Decoder* defaults,
TraceProcessorContext* context) {
using namespace protos::pbzero;
PerfSampleDefaults::Decoder perf_defaults(defaults->perf_sample_defaults());
PerfEvents::Timebase::Decoder timebase(perf_defaults.timebase());
auto config_given_name = timebase.name();
if (config_given_name.size > 0) {
return context->storage->InternString(config_given_name);
}
if (timebase.has_counter()) {
return context->storage->InternString(StringifyCounter(timebase.counter()));
}
if (timebase.has_tracepoint()) {
PerfEvents::Tracepoint::Decoder tracepoint(timebase.tracepoint());
return context->storage->InternString(tracepoint.name());
}
if (timebase.has_raw_event()) {
PerfEvents::RawEvent::Decoder raw(timebase.raw_event());
// This doesn't follow any pre-existing naming scheme, but aims to be a
// short-enough default that is distinguishable.
base::StackString<128> name(
"raw.0x%" PRIx32 ".0x%" PRIx64 ".0x%" PRIx64 ".0x%" PRIx64, raw.type(),
raw.config(), raw.config1(), raw.config2());
return context->storage->InternString(name.string_view());
}
PERFETTO_DLOG("Could not name the perf timebase counter");
return context->storage->InternString("unknown");
}
} // namespace
PerfSampleTracker::SamplingStreamInfo PerfSampleTracker::GetSamplingStreamInfo(
uint32_t seq_id,
uint32_t cpu,
protos::pbzero::TracePacketDefaults::Decoder* nullable_defaults) {
auto seq_it = seq_state_.find(seq_id);
if (seq_it == seq_state_.end()) {
seq_it = seq_state_.emplace(seq_id, next_perf_session_id_++).first;
}
SequenceState* seq_state = &seq_it->second;
uint32_t session_id = seq_state->perf_session_id;
auto cpu_it = seq_state->per_cpu.find(cpu);
if (cpu_it != seq_state->per_cpu.end())
return {seq_state->perf_session_id, cpu_it->second.timebase_track_id};
// No defaults means legacy producer implementation, assume default timebase
// of per-cpu timer. Always the case for Android R builds, and it isn't worth
// guaranteeing support for intermediate S builds in this aspect.
StringId name_id = kNullStringId;
if (!nullable_defaults || !nullable_defaults->has_perf_sample_defaults()) {
name_id = context_->storage->InternString(
StringifyCounter(protos::pbzero::PerfEvents::SW_CPU_CLOCK));
} else {
name_id = InternTimebaseCounterName(nullable_defaults, context_);
}
TrackId timebase_track_id = context_->track_tracker->CreatePerfCounterTrack(
name_id, session_id, cpu, /*is_timebase=*/true);
seq_state->per_cpu.emplace(cpu, timebase_track_id);
return {session_id, timebase_track_id};
}
} // namespace trace_processor
} // namespace perfetto
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