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e4b77237ac
1sec between clock snapshots is too much of a gap in time for perfetto to reasonably interpolate between clock timelines. Signed-off-by: Rob Clark <rob.clark@oss.qualcomm.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41315>
70 lines
2 KiB
C++
70 lines
2 KiB
C++
/*
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* Copyright © 2019-2021 Collabora, Ltd.
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* Author: Antonio Caggiano <antonio.caggiano@collabora.com>
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* Author: Robert Beckett <bob.beckett@collabora.com>
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* Author: Corentin Noël <corentin.noel@collabora.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include "pps.h"
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#include "pps_driver.h"
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namespace pps
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{
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struct GpuIncrementalState {
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bool was_cleared = true;
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std::unordered_map<uint32_t, double> last_counter_vals;
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};
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struct GpuDataSourceTraits : public perfetto::DefaultDataSourceTraits {
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using IncrementalStateType = GpuIncrementalState;
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};
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class Driver;
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/// @brief This datasource samples performance counters at a specified rate.
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/// Once the data is available, it sends a protobuf packet to the perfetto service.
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/// At the very beginning, it sends a description of the counters.
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/// After that, it sends counter values using the IDs set in the description.
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class GpuDataSource : public perfetto::DataSource<GpuDataSource, GpuDataSourceTraits>
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{
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public:
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void OnSetup(const SetupArgs &args) override;
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void OnStart(const StartArgs &args) override;
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void OnStop(const StopArgs &args) override;
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/// Blocks until the data source starts
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static void wait_started();
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/// @brief Perfetto trace callback
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static void trace_callback(TraceContext ctx);
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static void register_data_source(const std::string &driver_name);
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void trace(TraceContext &ctx);
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private:
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State state = State::Stop;
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/// Time between trace callbacks
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std::chrono::nanoseconds time_to_sleep = std::chrono::nanoseconds(1000000);
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/// Used to check whether the datasource is quick enough
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std::chrono::nanoseconds time_to_trace;
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/// Last CPU timestamp at which we correlated CPU/GPU timestamps
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unsigned samples_since_correlation = 0;
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/// CPU timestamp of packet sent with counter descriptors
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uint64_t descriptor_timestamp = 0;
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/// GPU timestamp of packet sent with counter descriptors
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uint64_t descriptor_gpu_timestamp = 0;
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/// Used to track the first available counters
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bool got_first_counters = false;
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};
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} // namespace pps
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