BitContradiction GPU performance improvements. Local variables partially optimized to limit registry pressure.
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mlemanczyk committed
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@@ -109,11 +109,13 @@ public struct MersenneNumberDivisorByDivisorCpuTesterWithTemplate() : IMersenneN
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int[] found = new int[maxThreadCount];
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ulong[] batchIndexWords = new ulong[inputCapacity];
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int debugWordsPerSlot = BitContradictionKernels.DebugWordCountPerSlot;
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using MemoryBuffer1D<ulong, Stride1D.Dense> debugBuffer = gpu.Accelerator.Allocate1D<ulong>(maxThreadCount * debugWordsPerSlot);
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using MemoryBuffer1D<int, Stride1D.Dense> delta8Keys = gpu.Accelerator.Allocate1D<int>(maxThreadCount * BitContradictionKernels.DeltaCacheSlots);
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using MemoryBuffer1D<int, Stride1D.Dense> delta8Cache = gpu.Accelerator.Allocate1D<int>(maxThreadCount * BitContradictionKernels.DeltaCacheSlots * 4194304);
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ArrayView1D<ulong, Stride1D.Dense> debugView = debugBuffer.View;
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#if DETAILED_LOG
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int debugWordsPerSlot = BitContradictionKernels.DebugWordCountPerSlot;
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using MemoryBuffer1D<ulong, Stride1D.Dense> debugBuffer = gpu.Accelerator.Allocate1D<ulong>(maxThreadCount * debugWordsPerSlot);
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ArrayView1D<ulong, Stride1D.Dense> debugView = debugBuffer.View;
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#endif
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BigInteger currentBatch = (currentK - BigInteger.One) / batchSizeBig;
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currentK = (currentBatch * batchSizeBig) + BigInteger.One;
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@@ -161,7 +163,11 @@ public struct MersenneNumberDivisorByDivisorCpuTesterWithTemplate() : IMersenneN
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}
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gpu.InputView.CopyFromCPU(stream, batchIndexWords.AsSpan(0, threadCount * wordCount));
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kernel(stream, threadCount, prime, gpu.InputView, countQ, gpu.OutputIntView, debugView, delta8Keys.View, delta8Cache.View);
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kernel(stream, threadCount, prime, gpu.InputView, countQ, gpu.OutputIntView,
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#if DETAILED_LOG
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debugView,
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#endif
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delta8Keys.View, delta8Cache.View);
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stream.Synchronize();
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gpu.OutputIntView.CopyToCPU(stream, found.AsSpan(0, threadCount));
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@@ -211,47 +217,49 @@ public struct MersenneNumberDivisorByDivisorCpuTesterWithTemplate() : IMersenneN
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// if (!dividesExact)
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// {
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// throw new InvalidOperationException($"BitContradiction CPU/GPU false positive for p={prime}, q={candidateQ}, k={candidateK}, batch={batchIndex}");
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if (prime == 138000001UL && candidateQ == new BigInteger(276000003))
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{
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ulong[] debugWords = new ulong[debugWordsPerSlot];
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debugView.SubView(i * debugWordsPerSlot, debugWordsPerSlot).CopyToCPU(stream, debugWords);
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BigInteger gpuQ = ReadBigIntegerFromWords(debugWords.AsSpan(0, 16));
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BigInteger gpuInv = ReadBigIntegerFromWords(debugWords.AsSpan(16, 16));
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BigInteger gpuALow = ReadBigIntegerFromWords(debugWords.AsSpan(32, 16));
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ulong gpuQBits = debugWords[48];
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ulong gpuQWordCount = debugWords[49];
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ulong gpuQMask0 = debugWords[50];
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ulong gpuQMask1 = debugWords[51];
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ulong gpuKnownOne0 = debugWords[52];
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ulong gpuKnownZero0 = debugWords[53];
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ulong gpuAOneWin0 = debugWords[54];
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ulong gpuAZeroWin0 = debugWords[55];
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long gpuCarryMin = unchecked((long)debugWords[56]);
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long gpuCarryMax = unchecked((long)debugWords[57]);
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long gpuMaxAllowedA = unchecked((long)debugWords[58]);
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long gpuMaxFixed = unchecked((long)debugWords[59]);
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long gpuWindowSize = unchecked((long)debugWords[60]);
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long gpuAWordCount = unchecked((long)debugWords[61]);
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long gpuMaxKnownA = unchecked((long)debugWords[62]);
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long gpuMaxFixedPrefilter = unchecked((long)debugWords[63]);
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ulong preKnownOne0 = debugWords[64];
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ulong preKnownZero0 = debugWords[65];
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ulong preAOneWin0 = debugWords[66];
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ulong preAZeroWin0 = debugWords[67];
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long preCarryMin = unchecked((long)debugWords[68]);
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long preCarryMax = unchecked((long)debugWords[69]);
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long preSegmentBase = unchecked((long)debugWords[70]);
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long preWindowColumn = unchecked((long)debugWords[71]);
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long gpuOffsetCount = unchecked((long)debugWords[72]);
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long gpuMaxOffset = unchecked((long)debugWords[73]);
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long gpuFirstForced = unchecked((long)debugWords[74]);
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long gpuFirstRemaining = unchecked((long)debugWords[75]);
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long gpuFirstQWordsEff = unchecked((long)debugWords[76]);
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ulong gpuFirstQLastEff = debugWords[77];
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long gpuFirstCarryMin = unchecked((long)debugWords[78]);
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long gpuFirstCarryMax = unchecked((long)debugWords[79]);
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throw new InvalidOperationException($"BitContradiction GPU debug for p={prime}, q={candidateQ}, k={candidateK}, qBits={gpuQBits}, qWordCount={gpuQWordCount}, qMask0=0x{gpuQMask0:X16}, qMask1=0x{gpuQMask1:X16}, knownOne0=0x{gpuKnownOne0:X16}, knownZero0=0x{gpuKnownZero0:X16}, aOneWin0=0x{gpuAOneWin0:X16}, aZeroWin0=0x{gpuAZeroWin0:X16}, carryMin={gpuCarryMin}, carryMax={gpuCarryMax}, maxAllowedA={gpuMaxAllowedA}, maxFixed={gpuMaxFixed}, windowSize={gpuWindowSize}, aWordCount={gpuAWordCount}, maxKnownA={gpuMaxKnownA}, maxFixedPrefilter={gpuMaxFixedPrefilter}, preKnownOne0=0x{preKnownOne0:X16}, preKnownZero0=0x{preKnownZero0:X16}, preAOneWin0=0x{preAOneWin0:X16}, preAZeroWin0=0x{preAZeroWin0:X16}, preCarryMin={preCarryMin}, preCarryMax={preCarryMax}, preSegmentBase={preSegmentBase}, preWindowColumn={preWindowColumn}, offsetCount={gpuOffsetCount}, maxOffset={gpuMaxOffset}, firstForced={gpuFirstForced}, firstRemaining={gpuFirstRemaining}, firstQWordsEff={gpuFirstQWordsEff}, firstQLastEff=0x{gpuFirstQLastEff:X16}, firstCarryMin={gpuFirstCarryMin}, firstCarryMax={gpuFirstCarryMax}, gpuQ={gpuQ}, gpuInv={gpuInv}, gpuALow={gpuALow}");
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}
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#if DETAILED_LOG
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if (prime == 138000001UL)
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{
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ulong[] debugWords = new ulong[debugWordsPerSlot];
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debugView.SubView(i * debugWordsPerSlot, debugWordsPerSlot).CopyToCPU(stream, debugWords);
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BigInteger gpuQ = ReadBigIntegerFromWords(debugWords.AsSpan(0, 16));
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BigInteger gpuInv = ReadBigIntegerFromWords(debugWords.AsSpan(16, 16));
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BigInteger gpuALow = ReadBigIntegerFromWords(debugWords.AsSpan(32, 16));
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ulong gpuQBits = debugWords[48];
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ulong gpuQWordCount = debugWords[49];
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ulong gpuQMask0 = debugWords[50];
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ulong gpuQMask1 = debugWords[51];
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ulong gpuKnownOne0 = debugWords[52];
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ulong gpuKnownZero0 = debugWords[53];
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ulong gpuAOneWin0 = debugWords[54];
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ulong gpuAZeroWin0 = debugWords[55];
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long gpuCarryMin = unchecked((long)debugWords[56]);
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long gpuCarryMax = unchecked((long)debugWords[57]);
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long gpuMaxAllowedA = unchecked((long)debugWords[58]);
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long gpuMaxFixed = unchecked((long)debugWords[59]);
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long gpuWindowSize = unchecked((long)debugWords[60]);
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long gpuAWordCount = unchecked((long)debugWords[61]);
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long gpuMaxKnownA = unchecked((long)debugWords[62]);
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long gpuMaxFixedPrefilter = unchecked((long)debugWords[63]);
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ulong preKnownOne0 = debugWords[64];
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ulong preKnownZero0 = debugWords[65];
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ulong preAOneWin0 = debugWords[66];
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ulong preAZeroWin0 = debugWords[67];
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long preCarryMin = unchecked((long)debugWords[68]);
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long preCarryMax = unchecked((long)debugWords[69]);
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long preSegmentBase = unchecked((long)debugWords[70]);
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long preWindowColumn = unchecked((long)debugWords[71]);
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long gpuOffsetCount = unchecked((long)debugWords[72]);
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long gpuMaxOffset = unchecked((long)debugWords[73]);
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long gpuFirstForced = unchecked((long)debugWords[74]);
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long gpuFirstRemaining = unchecked((long)debugWords[75]);
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long gpuFirstQWordsEff = unchecked((long)debugWords[76]);
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ulong gpuFirstQLastEff = debugWords[77];
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long gpuFirstCarryMin = unchecked((long)debugWords[78]);
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long gpuFirstCarryMax = unchecked((long)debugWords[79]);
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throw new InvalidOperationException($"BitContradiction GPU debug for p={prime}, q={candidateQ}, k={candidateK}, qBits={gpuQBits}, qWordCount={gpuQWordCount}, qMask0=0x{gpuQMask0:X16}, qMask1=0x{gpuQMask1:X16}, knownOne0=0x{gpuKnownOne0:X16}, knownZero0=0x{gpuKnownZero0:X16}, aOneWin0=0x{gpuAOneWin0:X16}, aZeroWin0=0x{gpuAZeroWin0:X16}, carryMin={gpuCarryMin}, carryMax={gpuCarryMax}, maxAllowedA={gpuMaxAllowedA}, maxFixed={gpuMaxFixed}, windowSize={gpuWindowSize}, aWordCount={gpuAWordCount}, maxKnownA={gpuMaxKnownA}, maxFixedPrefilter={gpuMaxFixedPrefilter}, preKnownOne0=0x{preKnownOne0:X16}, preKnownZero0=0x{preKnownZero0:X16}, preAOneWin0=0x{preAOneWin0:X16}, preAZeroWin0=0x{preAZeroWin0:X16}, preCarryMin={preCarryMin}, preCarryMax={preCarryMax}, preSegmentBase={preSegmentBase}, preWindowColumn={preWindowColumn}, offsetCount={gpuOffsetCount}, maxOffset={gpuMaxOffset}, firstForced={gpuFirstForced}, firstRemaining={gpuFirstRemaining}, firstQWordsEff={gpuFirstQWordsEff}, firstQLastEff=0x{gpuFirstQLastEff:X16}, firstCarryMin={gpuFirstCarryMin}, firstCarryMax={gpuFirstCarryMax}, gpuQ={gpuQ}, gpuInv={gpuInv}, gpuALow={gpuALow}");
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}
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#endif
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foundDivisor = candidateQ;
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AcceleratorStreamPool.Return(gpu.AcceleratorIndex, stream);
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