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https://github.com/hrydgard/ppsspp.git
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Henrik RydgårdandClaude Opus 5.5
1d5e2689b5
The native IR JITs get the emulator thread's host PC sampled every 50 us (a signal on macOS and Linux, SuspendThread on Windows), mapped to blocks, the routines they call and host functions. The report has each hot block's MIPS, IR and host code with the samples per host instruction. The IR interpreter's block timing, previously behind IR_PROFILING, now runs on the same switch. Both cost nothing when off. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <cstdint>
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#include <string>
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#include <vector>
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// Samples the host PC of one thread at a fixed rate, to find where JIT code spends its time.
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// Costs nothing until started.
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namespace JitProfiler {
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struct Sample {
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uintptr_t pc;
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// The return address, if the PC is in a leaf routine (ARM: LR, x86-64: [rsp]). Only meaningful when
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// the PC is in a routine called from a block that saves nothing (like the dot product routine).
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uintptr_t caller;
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};
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// Whether this host can sample at all.
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bool Supported();
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// Starts sampling the calling thread, every periodMicros.
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bool Start(int periodMicros);
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void Stop();
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bool IsRunning();
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int PeriodMicros();
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// Appends the samples taken since the last drain. Call from the sampled thread, or after Stop().
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void Drain(std::vector<Sample> &out);
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// Samples lost to a full buffer.
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uint64_t Dropped();
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// The name of the host function containing pc, or "" if unknown. Slow.
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std::string DescribeHostAddress(uintptr_t pc, uintptr_t *symbolStart);
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} // namespace JitProfiler
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