Date: Sat, 1 May 2021 18:41:23 +0200 From: Crest <crest@rlwinm.de> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD 13.0 terrible performance in KVM Message-ID: <a303337e-ad6e-84b7-666c-f59649b050f7@rlwinm.de> In-Reply-To: <rmaV76VD-3j_2df_4ioUT68NZJRqvFgJb3Mkix36DZvkwKJczIzs8eWkHXtSTpXAlY3EoyZVascux-sm4WTcssmwbavJzEJGmdoCpzySVSA=@protonmail.ch> References: <AKYOQu-q6fYoMOt_DBnDKFsHwIX2WYQiAsy0IqDO39auUExYH6L8mVG0mrSKW9G-XRSPjeuB9NxrZsYPira8Gv4NodyIx7z4w_iqxjJwS-Y=@protonmail.ch> <1699dc93-7070-e5f0-8fc1-2ca4f77db3ac@burgh.net> <rmaV76VD-3j_2df_4ioUT68NZJRqvFgJb3Mkix36DZvkwKJczIzs8eWkHXtSTpXAlY3EoyZVascux-sm4WTcssmwbavJzEJGmdoCpzySVSA=@protonmail.ch>
next in thread | previous in thread | raw e-mail | index | archive | help
On 25.04.21 11:15, dashdruid via freebsd-stable wrote: > Hello, > > I have reinstalled it with GPT/ZFS and your right it's much better. Same search taking 3-6 seconds so I have deleted now all my old UFS based FreeBSD images. If the partitioning alone changed something it was probably an alignment problem. These are things you can try: * Create a VM with two virtual disks. * Install a UFS system on the first disk. * Create and mount a UFS on the unpartitioned second disk. * Copy the whole system with tar to the second disk. * Reboot the VM. * Compare performance on both file disks. Maybe your virtual disk backend is is just terrible with unaligned accesses.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?a303337e-ad6e-84b7-666c-f59649b050f7>