Hi Rik, On 11/12/2017 04:23 PM, Rik van Riel wrote: > On Fri, 2017-11-03 at 16:30 -0400, nilal@xxxxxxxxxx wrote: >> The following patch-set proposes an efficient mechanism for handing >> freed memory between the guest and the host. It enables the guests >> with DAX (no page cache) to rapidly free and reclaim memory to and >> from the host respectively. > >> Performance: >> Test criteria: Kernel Build >> Command: make clean;make defconfig;time make >> With Hinting: >> real: 21m24.680s >> user: 16m3.362s >> sys : 2m19.027s >> Without Hinting: >> real: 21m18.062s >> user: 16m13.969s >> sys : 1m17.884s >> >> Test criteria: Stress Test >> Command: time stress --io 2 --cpu 2 --vm 2 --vm-bytes 1024M -- >> timeout 100s -v >> With Hinting: >> real: 1m40.726s >> user: 1m23.449s >> sys : 0m5.576s >> Without Hinting: >> real: 1m40.378s >> user: 1m21.292s >> sys : 0m4.972s > These numbers look really good, but these workloads are mostly in > user space. > > Could you also try with more kernel heavy workloads, like netperf > (sender and receiver on the same CPU, vs sender and receiver on > different CPUs) and hackbench? > Yeap, I can do that. Thanks for the suggestion. -- Regards Nitesh
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