On Thu, Sep 24, 2015 at 11:28:36AM -0700, Jaegeuk Kim <jaeg...@kernel.org> wrote: > > The log starts after only 20GB had been written. Here is the status output > > at 25GB: > > > > http://ue.tst.eu/734f7883107ee4dabff77602db92310b.txt > > It seems about 700MB were moved by background GC.
And to quantify "slower", copying 2.1TiB took 18h, at 35.6MB/s. "sync" was routinely taking minutes to execute. As a sidenote, a "du" on cold cache pulled in data from the drive at ~26MB/s, which is quite impressive. At the number of files, that means it is pulling in ~4.4kb/stat. It also means it stat's at 5869 files/s, which is very good! I hadn't expected this from a flash file system on rotational media. > > Any idea why 4.2.1 performs so much worse than 3.8.21? > > One thing that we can try is to run the latest f2fs source in v3.18. > This branch supports f2fs for v3.18. Will do! > And, if possible, could you share the status output of both of v3.18 and v4.2? Will do, this is the output for 4.2.1, after copying and having it sit idle for a few hours. http://ue.tst.eu/90522477a480ae7a3b71647269b31ff7.txt -- The choice of a Deliantra, the free code+content MORPG -----==- _GNU_ http://www.deliantra.net ----==-- _ generation ---==---(_)__ __ ____ __ Marc Lehmann --==---/ / _ \/ // /\ \/ / schm...@schmorp.de -=====/_/_//_/\_,_/ /_/\_\ ------------------------------------------------------------------------------ _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
