I'm not sure how far we want to get into optimizing fio for specific CPUs?
I've done some testing and found that when running the mmap ioengine
against an NVDIMM-N on a modern Intel CPU I can gain a few hundred MB/s
by optimizing the memory copy using avx/avx2 versus the system's memcpy
implementation.
Should I proceed with submitting a patch, or do we want to avoid getting
into these sort of optimizations?
--
Rebecca
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