On Tue, Nov 10, 2020 at 3:04 PM 172060045 <172060...@hdu.edu.cn> wrote: > > Hi, > > Recently, I was interested in GCC AutoFDO optimization, which works by > sampling specific PMU event on production machines and using those profiles > to guide optimization. In this way, information such as cache miss can also > be obtained through sampling, so can we implement feedback-directed cache > optimization according to this idea? IIUC, the original AutoFDO doesn't do icache optimization based on icache-miss perf data, but I think this is possible to do. One point is linker needs to be involved in order to reorder functions, not only GCC itself. Also TLB-miss might be handled too.
Thanks, bin > > ARMv8.2 provides SPE features, which can obtain accurate LLC miss, TLB miss, > branch miss and remote access information through perf, it may be helpful to > the idea. > > > Is any one doing relevant work?It would be grateful if someone could offer > any advices, thx!
