On 02/05/2018 16:17, Punit Agrawal wrote: > Hi Laurent, > > One query below - > > Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx> writes: > > [...] > >> >> Ebizzy: >> ------- >> The test is counting the number of records per second it can manage, the >> higher is the best. I run it like this 'ebizzy -mTRp'. To get consistent >> result I repeated the test 100 times and measure the average result. The >> number is the record processes per second, the higher is the best. >> >> BASE SPF delta >> 16 CPUs x86 VM 12405.52 91104.52 634.39% >> 80 CPUs P8 node 37880.01 76201.05 101.16% > > How do you measure the number of records processed? Is there a specific > version of ebizzy that reports this? I couldn't find a way to get this > information with the ebizzy that's included in ltp. I'm using the original one : http://ebizzy.sourceforge.net/ > >> >> Here are the performance counter read during a run on a 16 CPUs x86 VM: >> Performance counter stats for './ebizzy -mRTp': >> 860074 faults >> 856866 spf >> 285 pagefault:spf_pte_lock >> 1506 pagefault:spf_vma_changed >> 0 pagefault:spf_vma_noanon >> 73 pagefault:spf_vma_notsup >> 0 pagefault:spf_vma_access >> 0 pagefault:spf_pmd_changed >> >> And the ones captured during a run on a 80 CPUs Power node: >> Performance counter stats for './ebizzy -mRTp': >> 722695 faults >> 699402 spf >> 16048 pagefault:spf_pte_lock >> 6838 pagefault:spf_vma_changed >> 0 pagefault:spf_vma_noanon >> 277 pagefault:spf_vma_notsup >> 0 pagefault:spf_vma_access >> 0 pagefault:spf_pmd_changed >> >> In ebizzy's case most of the page fault were handled in a speculative way, >> leading the ebizzy performance boost. > > A trial run showed increased fault handling when SPF is enabled on an > 8-core ARM64 system running 4.17-rc3. I am using a port of your x86 > patch to enable spf on arm64. > > SPF > --- > > Performance counter stats for './ebizzy -vvvmTRp': > > 1,322,736 faults > 1,299,241 software/config=11/ > > 10.005348034 seconds time elapsed > > No SPF > ----- > > Performance counter stats for './ebizzy -vvvmTRp': > > 708,916 faults > 0 software/config=11/ > > 10.005807432 seconds time elapsed Thanks for sharing these good numbers ! > Thanks, > Punit > > [...] >
