On Thu, Aug 2, 2018 at 1:25 PM, Conrad Meyer <c...@freebsd.org> wrote:
> Author: cem > Date: Thu Aug 2 19:25:43 2018 > New Revision: 337165 > URL: https://svnweb.freebsd.org/changeset/base/337165 > > Log: > FUSE: Bump maximum IO size to enable more performant operation > > Various components restrict size of IO passed up to the userspace > filesystem > based on the mount's f_iosize value. The previous default of PAGE_SIZE > is anemic, even for normal filesystems, but especially considering every > FUSE operation involves a kernel <-> userspace IPC upcall. > > Bump to DFLTPHYS (currently 64kB) to match other FUSE implementations. > > Anecdotally, Jakub reports IO read performance increased from 600 MB/s -> > 2700 MB/s with a basic RAM-backed FUSE filesystem. > > PR: 230260 > Reported by: Peter (MooseFS) <freebsd AT moosefs.com> > Tested by: Jakub Kruszona-Zawadzki <acid AT moosefs.com> > MFC after: 3 days > > Modified: > head/sys/fs/fuse/fuse_vfsops.c > > Modified: head/sys/fs/fuse/fuse_vfsops.c > ============================================================ > ================== > --- head/sys/fs/fuse/fuse_vfsops.c Thu Aug 2 19:19:53 2018 > (r337164) > +++ head/sys/fs/fuse/fuse_vfsops.c Thu Aug 2 19:25:43 2018 > (r337165) > @@ -341,7 +341,7 @@ fuse_vfsop_mount(struct mount *mp) > mp->mnt_kern_flag |= MNTK_USES_BCACHE; > MNT_IUNLOCK(mp); > /* We need this here as this slot is used by getnewvnode() */ > - mp->mnt_stat.f_iosize = PAGE_SIZE; > + mp->mnt_stat.f_iosize = DFLTPHYS; > Why DFLTPHYS instead of MAXPHYS? DFLTPHYS defaults to 64k, while MAXPHYS is 128k. Or do you expect people that want different behavior to raise both? Warner _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
