Date: Mon, 2 Nov 2015 12:29:54 -0500 From: Richard Kuhns <rjk@wintek.com> To: Christer Solskogen <christer.solskogen@gmail.com>, <freebsd-emulation@freebsd.org> Subject: Re: Slowness with Virtualbox Message-ID: <56379D92.40501@wintek.com> In-Reply-To: <n0lpc3$9dh$1@ger.gmane.org> References: <n0lpc3$9dh$1@ger.gmane.org>
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How many cores on your physical box? I have a 6 core Dell precision 7810. If hyperthreading is enabled (so FreeBSD apparently thinks I have 12 cores), and VMs running under VirtualBox are so slow as to be totally unusable. If I disable hyperthreading, VMs are still extremely slow but usable in case of emergency. My previous desktop only had 2 cores, but I had no issues with VMs. Someone else (ohartman@zedat.fu-berlin.de, I think) mentioned that he'd seen the same issue. - Richard On 10/26/15 13:54, Christer Solskogen wrote: > Hi! > > I wrote this yesterday without any response so far: > https://forums.freebsd.org/threads/poor-performance-with-virtualbox-ose.53722/ > > > Short story. My "pretty" fast FreeBSD server (host) runs Virtualbox > guests (Linux/CentOS) very slowly. Much slower than I anticipated. I've > had Linux on that box before with Virtualbox without the same slowness. > Where should I begin to look? > > And by slow, I mean /slow/. I have a PXE boot system where I can boot > and install via kickstart a CentOS system in just about 4 min on a > Windows machine with VirtualBox. On my FreeBSD host it takes about > 10-15min. Network is slow, but disk seems to be OK. > > If I put some load on the guest, the guest locks up and I loose network > connection to it, while the console (from VirtualBox GUI) is not > responding (but the GUI for VirtualBox is working properly) > > Help, please! > > FreeBSD friend 10.2-RELEASE-p4 FreeBSD 10.2-RELEASE-p4 #0 r288404: Thu > Oct 22 22:58:13 CEST 2015 root@friend:/usr/obj/usr/src/sys/FRIEND > amd64 > > virtualbox-ose-4.3.32 (I have also tried the unofficial 5.x port, but > with the same result) > -- Richard Kuhns <rjk@wintek.com> Main Number: 765-742-8428 Wintek Corporation Direct: 765-269-8541 427 N 6th Street Internet Support: 765-269-8503 Lafayette, IN 47901-2211 Consulting: 765-269-8504
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