Date: Sat, 24 Apr 2021 09:03:22 -0400 From: Jeff Love <jl@burgh.net> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD 13.0 terrible performance in KVM Message-ID: <1699dc93-7070-e5f0-8fc1-2ca4f77db3ac@burgh.net> In-Reply-To: <AKYOQu-q6fYoMOt_DBnDKFsHwIX2WYQiAsy0IqDO39auUExYH6L8mVG0mrSKW9G-XRSPjeuB9NxrZsYPira8Gv4NodyIx7z4w_iqxjJwS-Y=@protonmail.ch> References: <AKYOQu-q6fYoMOt_DBnDKFsHwIX2WYQiAsy0IqDO39auUExYH6L8mVG0mrSKW9G-XRSPjeuB9NxrZsYPira8Gv4NodyIx7z4w_iqxjJwS-Y=@protonmail.ch>
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I'm running 12.2 and 13.0 on KVM using virtio and zfs. I am not having disk I/O issues. Jeff Love On 4/24/21 5:25 AM, dashdruid via freebsd-stable wrote: > Hello List, > > I hope some other folks out there running FreeBSD on KVM as well. I set up a base VM while doing so I noticed that the disk operations are very slow. Many times I edit a file in vim or try to run a command there is a huge lag. > > I use UFS as the root filesystem. To have something to compare it with I have tested it against an OpenBSD 6.6 VM on the same host, same hardware. both have 1 vCPU and 1GB of ram, 20GB virtual disk (they are exactly on the same physical disk no raid or anything to have a fair comparison). > > Here is an example simple file search time for a non-existent file: > > FreeBSD 13 > > time find / -name cacert.pem > > real 0m30.656s > user 0m0.516s > sys 0m3.938s > > Second run even worse > > real 2m38.618s > user 0m0.711s > sys 0m6.882s > > While on the OpenBSD VM I get > > time find / -name cacert.pem > > real 0m2.258s > user 0m0.290s > sys 0m1.970s > > The amount of data is about the same on both systems but I would not consider this a "slight" performance degradation. If the base system is so slow then imagine putting Apache and other servers on top of it. Did anyone run into this? > > Unless there is a definitive solution I will opt out to using other BSD variants. > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
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