f5d56a3124
Add a `--profile-gpu` launch argument. When set, it generates a profile in the Trace Event Format with CPU and GPU metrics based on GPU debug scopes. https://profilerpedia.markhansen.co.nz/formats/trace-event-format/ The profiles are best viewed at https://ui.perfetto.dev/ Notes: - The profiler captures everything form app start to exit. - Being JSON based the profiles can become relatively large, but they compress very well. - Only OpenGL profiling is supported for now, but the report formatting code can be shared across backends. Pull Request: https://projects.blender.org/blender/blender/pulls/133557
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/* SPDX-FileCopyrightText: 2025 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "BLI_map.hh"
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#include "BLI_string_ref.hh"
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#include <fmt/format.h>
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#include <fstream>
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#include <iostream>
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#include <mutex>
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#include <sstream>
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#include <thread>
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namespace blender::gpu {
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class ProfileReport {
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private:
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std::fstream _report;
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std::mutex _mutex;
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Map<size_t, int> _thread_ids;
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ProfileReport()
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{
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_report.open("profile.json", std::ios::out);
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_report << R"([{"name":"process_name","ph":"M","pid":1,"args":{"name":"GPU"}})"
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",\n";
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_report << R"({"name":"process_name","ph":"M","pid":2,"args":{"name":"CPU"}})";
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}
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~ProfileReport()
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{
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_report << "\n]\n";
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_report.close();
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}
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public:
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static ProfileReport &get()
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{
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static ProfileReport singleton;
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return singleton;
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}
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void add_group(StringRefNull name,
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uint64_t gpu_start,
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uint64_t gpu_end,
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uint64_t cpu_start,
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uint64_t cpu_end)
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{
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std::scoped_lock lock(_mutex);
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size_t thread_hash = std::hash<std::thread::id>()(std::this_thread::get_id());
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int thread_id = _thread_ids.lookup_or_add(thread_hash, _thread_ids.size());
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_report << fmt::format(
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",\n"
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R"({{"name":"{}","ph":"X","ts":{},"dur":{},"pid":1,"tid":{}}})",
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name.c_str(),
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gpu_start / uint64_t(1000),
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(gpu_end - gpu_start) / uint64_t(1000),
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thread_id);
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_report << fmt::format(
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",\n"
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R"({{"name":"{}","ph":"X","ts":{},"dur":{},"pid":2,"tid":{}}})",
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name.c_str(),
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cpu_start / uint64_t(1000),
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(cpu_end - cpu_start) / uint64_t(1000),
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thread_id);
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}
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};
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} // namespace blender::gpu
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