Hi Huang, On Thu, Aug 04, 2016 at 10:00:41AM -0700, Huang, Ying wrote: > Hi, Jaegeuk, > > "Huang, Ying" <[email protected]> writes: > > Hi, > > > > I checked the comparison result below and found this is a regression for > > fsmark.files_per_sec, not fsmark.app_overhead. > > > > Best Regards, > > Huang, Ying > > > > kernel test robot <[email protected]> writes: > > > >> FYI, we noticed a -36.3% regression of fsmark.files_per_sec due to commit: > >> > >> commit ec795418c41850056feb956534edf059dc1155d4 ("f2fs: use > >> percpu_rw_semaphore") > >> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test > > I found this has been merged by upstream. Do you have some plan to fix > it? Or you think the test itself has some problem?
Sorry, too busy to take a look at this. The patch implements percpu_rw_semaphore which is intended to enhance FS scalability. Since I couldn't see any big regression in my test cases, could you check any debugging options which may give some overheads? Let me recheck this with whole my tests. Thanks, > > We have another 2 regressions > > - [lkp] [f2fs] 3bdad3c7ee: aim7.jobs-per-min -25.3% regression > - [lkp] [f2fs] b93f771286: aim7.jobs-per-min -81.2% regression > > they are merged by upstream now too. So same questions for them too. > > Best Regards, > Huang, Ying > > >> in testcase: fsmark > >> on test machine: 72 threads Haswell-EP with 128G memory > >> with following parameters: > > cpufreq_governor=performance/disk=1SSD/filesize=8K/fs=f2fs/iterations=8/nr_directories=16d/nr_files_per_directory=256fpd/nr_threads=4/sync_method=fsyncBeforeClose/test_size=72G > >> > >> > >> > >> Disclaimer: > >> Results have been estimated based on internal Intel analysis and are > >> provided > >> for informational purposes only. Any difference in system hardware or > >> software > >> design or configuration may affect actual performance. > >> ------------------------------------------------------------------------------ _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
