Adjustments in AlpakaCore/prefixScan and its test + Add helper functions to handle workdiv#167

Merged

makortel merged 23 commits intocms-patatrack:masterfrom ghugo83:prefixscan_fix

Mar 30, 2021

+738-402

Commits on Feb 1, 2021

prefixScan: Keep same workload between CUDA and ALPAKA tests, to be able to perform comparisons. Also keep same workload between SERIAL, TBB and CUDA versions, to be able to do perf comparisons (pr…
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Remove unsupported #pragma unroll. Remove unused variables. Cannot use __restrict__ in warpPrefixScan and blockPrefixScan, as they are called with blockPrefixScan(acc, psum, psum, numBlocks, ws), i…
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Only calculate warpPrefixScan workDiv for GPU case
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Cleaner to directly call with cms::alpakatools::
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testPrefixScan: take into account dependency on number of elements in work division. + IMPORTANT: memory allocation should not include the sizeof(type), this is already taken into account internall…
ghugo83
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IMPORTANT: Should not have alpaka::wait::wait(queue); in between kernels. Strong effect on perf here.
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Comments
ghugo83
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clang-format
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Commits on Feb 3, 2021

[alpaka] Add CMS_UNROLL_LOOP macro written by fwyzard from cms-sw/cmssw#32499 (supported compilers: CUDA nvcc, gcc, clang).
ghugo83
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Commits on Mar 26, 2021

Pass function by value in helper functions
ghugo83
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