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Inconsistency for Num threads calculation if they don't specified #217
Description
We have few places in code with code like:
_threads = Math.Max(1, args.Threads ?? (Environment.ProcessorCount / 2));
in some places it's Math.Max(2, Environment.ProcessorCount - 1)
in others it'sArgs.NumThreads ?? Environment.ProcessorCount;
which is a bit strange. It's either half of cores, all cores, or we left one core to be free.
KMeans, SdcaRegression, LinearClassifier , and BinaryLoader use half of available cores which leads to 50% CPU utilization.
@TomFinley, @GalOshri , @glebuk
Activity
shmoradims commentedon Nov 28, 2018
@Ivanidzo4ka i think this issue still needs discussion to define what the fix should be. I added need-info tag for now (feel free to revert)
@eerhardt @TomFinley @Zruty0 could you please discuss a concrete action path for this issue so it can be fixed? Thanks.
Seal API classes (and make EnableCaching internal) (dotnet#217)
code migration from machinelearning-automl to machinelearning repo fe…
Seal API classes (and make EnableCaching internal) (dotnet#217)
Added onnx export functionality for LpNormNormalizingTransformer (#4161)
Added Onnx export functionality to PCATransformer (#4188)
rosebyte commentedon Sep 9, 2026
triage: we will investigate if there is a reason to have the same thread counts everywhere