On 09/05/2017 05:33 PM, Pranith Kumar wrote: >> This significantly degrades performance of alpha-softmmu. >> It spends about 25% of all cpu time in memset. > > What workload does it degrade for? I will try to reproduce and see > which memset is causing this.
emerge --update --ask @world which is a lot of python, iirc. It is the tlb flush memset that is causing this. The tlb has grown from a few kB to 300kB with your patch. r~
