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MCOL-5044 This patch replaces PriorityThreadPool with FairThreadPool that uses a simple

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operations + morsel size weight model to equally allocate CPU b/w parallel query morsels.
This patch delivers better parallel query timings distribution(timings graph resembles normal
distribution with a bigger left side thus more queries runs faster comparing with PrioThreadPool-based
single-node installation).
See changes in batchprimitiveprocessor-jl.h and comments in fair_threadpool.h for
important implementation details
This commit is contained in:
Roman Nozdrin
2022-05-24 17:57:40 +00:00
committed by Roman Nozdrin
parent 0f0b3a2bed
commit fd8ba33f21
12 changed files with 173 additions and 254 deletions
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4
dbcon/joblist/batchprimitiveprocessor-jl.cpp
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@ -1274,6 +1274,10 @@ void BatchPrimitiveProcessorJL::runBPP(ByteStream& bs, uint32_t pmNum)
bs << uniqueID;
bs << _priority;
// The weight is used by PrimProc thread pool algo
uint32_t weight = calculateBPPWeight();
bs << weight;
bs << dbRoot;
bs << count;