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91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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JPH_NAMESPACE_BEGIN
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//////////////////////////////////////////////////////////////////////////////////////////
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// ProfileThread
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//////////////////////////////////////////////////////////////////////////////////////////
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ProfileThread::ProfileThread(const string_view &inThreadName) :
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mThreadName(inThreadName)
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{
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Profiler::sInstance->AddThread(this);
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}
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ProfileThread::~ProfileThread()
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{
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Profiler::sInstance->RemoveThread(this);
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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// ProfileMeasurement
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//////////////////////////////////////////////////////////////////////////////////////////
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JPH_TSAN_NO_SANITIZE // TSAN reports a race on sOutOfSamplesReported, however the worst case is that we report the out of samples message multiple times
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ProfileMeasurement::ProfileMeasurement(const char *inName, uint32 inColor)
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{
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ProfileThread *current_thread = ProfileThread::sGetInstance();
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if (current_thread == nullptr)
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{
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// Thread not instrumented
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mSample = nullptr;
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}
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else if (current_thread->mCurrentSample < ProfileThread::cMaxSamples)
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{
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// Get pointer to write data to
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mSample = ¤t_thread->mSamples[current_thread->mCurrentSample++];
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// Start constructing sample (will end up on stack)
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mTemp.mName = inName;
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mTemp.mColor = inColor;
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// Collect start sample last
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mTemp.mStartCycle = GetProcessorTickCount();
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}
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else
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{
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// Out of samples
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if (!sOutOfSamplesReported)
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{
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sOutOfSamplesReported = true;
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Trace("ProfileMeasurement: Too many samples, some data will be lost!");
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}
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mSample = nullptr;
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}
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}
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ProfileMeasurement::~ProfileMeasurement()
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{
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if (mSample != nullptr)
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{
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// Finalize sample
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mTemp.mEndCycle = GetProcessorTickCount();
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// Write it to the memory buffer bypassing the cache
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static_assert(sizeof(ProfileSample) == 32, "Assume 32 bytes");
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static_assert(alignof(ProfileSample) == 16, "Assume 16 byte alignment");
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#if defined(JPH_USE_SSE)
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const __m128i *src = reinterpret_cast<const __m128i *>(&mTemp);
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__m128i *dst = reinterpret_cast<__m128i *>(mSample);
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__m128i val = _mm_loadu_si128(src);
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_mm_stream_si128(dst, val);
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val = _mm_loadu_si128(src + 1);
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_mm_stream_si128(dst + 1, val);
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#elif defined(JPH_USE_NEON)
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const int *src = reinterpret_cast<const int *>(&mTemp);
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int *dst = reinterpret_cast<int *>(mSample);
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int32x4_t val = vld1q_s32(src);
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vst1q_s32(dst, val);
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val = vld1q_s32(src + 4);
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vst1q_s32(dst + 4, val);
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#else
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memcpy(mSample, &mTemp, sizeof(ProfileSample));
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#endif
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mSample = nullptr;
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}
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}
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JPH_NAMESPACE_END
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