Hi Peter, Thank you so much for working on this. On 2/18/23 4:10 AM, Peter Xu wrote: > Hi, Muhammad, > > On Fri, Feb 17, 2023 at 05:31:19PM +0500, Muhammad Usama Anjum wrote: >> I've just ran my single threaded selftest [1] over an over again to get >> some numbers. >> >> Without zeropage >> qemu has 6 cores: 26.0355 > > Did you count in the time of read prefault? Or did you not prefault at > all? No, pre-faulting is not being done in both of the runs. Without zeropage, I'm checking pte_none() to decide if page is dirty. With zeropage, I'm just checking if WP flag isn't set to decide if page is dirty. > >> With zeropage >> qemu has 6 cores: 39.203 >> >> 33% worse performance with zero pages >> >> Definitely, there can be better benchmark application. Please let me know >> if I should write better benchmarks on my end. >> >> [1] >> https://lore.kernel.org/all/20230202112915.867409-7-usama.anjum@xxxxxxxxxxxxx > > I'll have a closer look too next week. > > Thanks, > -- BR, Muhammad Usama Anjum
