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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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8
primitives/primproc/batchprimitiveprocessor.h
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@ -137,6 +137,11 @@ class BatchPrimitiveProcessor
fBusy = b;
}
size_t getWeight() const
{
return weight_;
}
uint16_t FilterCount() const
{
return filterCount;
@ -433,6 +438,9 @@ class BatchPrimitiveProcessor
uint ptMask;
bool firstInstance;
uint64_t valuesLBID;
uint32_t weight_;
static const uint64_t maxResultCount = 1048576; // 2^20
friend class Command;
friend class ColumnCommand;