Re: [LKP] [lkp] [locking/mutexes] cb4bbc457b: -40.0% unixbench.score
On Mon, Jan 25, 2016 at 09:23:59AM +0800, Huang, Ying wrote: > Davidlohr Bueso writes: > > > On Fri, 22 Jan 2016, kernel test robot wrote: > > > >>FYI, we noticed the below changes on > >> > >>https://github.com/0day-ci/linux > >> Ding-Tianhong/locking-mutexes-don-t-spin-on-owner-when-wait-list-is-not-NULL/20160121-173317 > >>commit cb4bbc457bfed6194ffab1b10c7be73b3f16ca2d ("locking/mutexes: don't > >>spin on owner when wait list is not NULL.") > > > > I'm not sure why this would even be reported, as this patch has not been > > accepted > > or acked or nothin', by anyone. > > Sorry for bothering. The purpose is FYI as in the original report > email. We test patches posted to LKML, if we found some changes related > to the patch, we will send out a report. Hope the reviewer could > take that as information for his/her review if the report isn't totally > nonsense. For me, the 0day reports on LKML postings have been quite helpful. They give the submitter immediate feedback on a number of issues, thus reducing the number of rounds of review. Thanx, Paul
Re: [LKP] [lkp] [locking/mutexes] cb4bbc457b: -40.0% unixbench.score
Davidlohr Bueso writes: > On Fri, 22 Jan 2016, kernel test robot wrote: > >>FYI, we noticed the below changes on >> >>https://github.com/0day-ci/linux >> Ding-Tianhong/locking-mutexes-don-t-spin-on-owner-when-wait-list-is-not-NULL/20160121-173317 >>commit cb4bbc457bfed6194ffab1b10c7be73b3f16ca2d ("locking/mutexes: don't spin >>on owner when wait list is not NULL.") > > I'm not sure why this would even be reported, as this patch has not been > accepted > or acked or nothin', by anyone. Sorry for bothering. The purpose is FYI as in the original report email. We test patches posted to LKML, if we found some changes related to the patch, we will send out a report. Hope the reviewer could take that as information for his/her review if the report isn't totally nonsense. > In this particular case that raw performance drop > is because spinning is pretty much disabled by Ding's change. Totally > expected for > the kind of workload unixbench triggers. The report is just raw performance data, it still need people to explain it. Thanks a lot for your explanation. > All this does is hurt lkml-searchability. Sorry, I don't understand this. You could still search the original patch. Could you explain a little? Best Regards, Huang, Ying > Thanks, > Davidlohr > ___ > LKP mailing list > l...@lists.01.org > https://lists.01.org/mailman/listinfo/lkp
Re: [lkp] [locking/mutexes] cb4bbc457b: -40.0% unixbench.score
On Fri, 22 Jan 2016, kernel test robot wrote: FYI, we noticed the below changes on https://github.com/0day-ci/linux Ding-Tianhong/locking-mutexes-don-t-spin-on-owner-when-wait-list-is-not-NULL/20160121-173317 commit cb4bbc457bfed6194ffab1b10c7be73b3f16ca2d ("locking/mutexes: don't spin on owner when wait list is not NULL.") I'm not sure why this would even be reported, as this patch has not been accepted or acked or nothin', by anyone. In this particular case that raw performance drop is because spinning is pretty much disabled by Ding's change. Totally expected for the kind of workload unixbench triggers. All this does is hurt lkml-searchability. Thanks, Davidlohr