Date: Sun, 3 Nov 2024 18:11:35 +0100 From: Stephan Althaus <Stephan.Althaus@Duedinghausen.eu> To: virtualization@freebsd.org Subject: Re: CPU count and slow Windows VM Message-ID: <9ac8a62b-8630-45a9-984f-d6f53913934b@Duedinghausen.eu> In-Reply-To: <fc813e0d-5c71-450e-a3d8-3d6aa28b1b96@app.fastmail.com> References: <fc813e0d-5c71-450e-a3d8-3d6aa28b1b96@app.fastmail.com>
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This is a multi-part message in MIME format. --------------nlyEUxqc7cJXlztHYnhOHnno Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 11/3/24 16:45, Chuck Tuffli wrote: > I'm helping someone trouble-shoot a sluggish Windows 11 VM running > under bhyve (FreeBSD 14.1) related to the number of vCPUs. With 1-2 > vCPUs, the VM's performance is reasonable, but adding 8 or more vCPUs > makes the VM nearly unusable because even moving the mouse takes minutes. > > Before I dig into this, do these symptoms sound familiar? I did find a > mention on the wiki (1): > > Only one or two VCPUs should be used during installation but this > number > can be increased once Windows is installed > > Is there something missing from bhyve's emulation that causes this? > TIA > > --chuck > > (1) https://wiki.freebsd.org/bhyve/Windows Hi! I am using Win10 on bhyve (FreeBSD 14.1-RELEASE-p5) with 20 vCPU and no problem here.. I would suggest first going back zu 2 vCPUs and updating all related drivers (bhyve-virtio*...) and let windows doing its internal things like searching for updates... How are you accessing the vm, via VNC or RDP ? Maybe theres some network problem.. just my 2 cents.. Regards, Stephan --------------nlyEUxqc7cJXlztHYnhOHnno Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <div class="moz-cite-prefix">On 11/3/24 16:45, Chuck Tuffli wrote:<br> </div> <blockquote type="cite" cite="mid:fc813e0d-5c71-450e-a3d8-3d6aa28b1b96@app.fastmail.com"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title></title> <style type="text/css">p.MsoNormal,p.MsoNoSpacing{margin:0}</style> <div>I'm helping someone trouble-shoot a sluggish Windows 11 VM running under bhyve (FreeBSD 14.1) related to the number of vCPUs. With 1-2 vCPUs, the VM's performance is reasonable, but adding 8 or more vCPUs makes the VM nearly unusable because even moving the mouse takes minutes.<br> </div> <div><br> </div> <div>Before I dig into this, do these symptoms sound familiar? I did find a mention on the wiki (1):<br> </div> <div><br> </div> <div> Only one or two VCPUs should be used during installation but this number<br> </div> <div> can be increased once Windows is installed<br> </div> <div><br> </div> <div>Is there something missing from bhyve's emulation that causes this?<br> </div> <div>TIA<br> </div> <div><br> </div> <div>--chuck<br> </div> <div><br> </div> <div>(1) <a href="https://wiki.freebsd.org/bhyve/Windows" moz-do-not-send="true" class="moz-txt-link-freetext">https://wiki.freebsd.org/bhyve/Windows</a><br>; </div> </blockquote> <p>Hi!</p> <p>I am using Win10 on bhyve (FreeBSD 14.1-RELEASE-p5) with 20 vCPU and no problem here..</p> <p>I would suggest first going back zu 2 vCPUs and updating all related drivers (bhyve-virtio*...) and let windows doing its internal things like searching for updates...</p> <p>How are you accessing the vm, via VNC or RDP ? Maybe theres some network problem..</p> <p>just my 2 cents..</p> <p>Regards,<br> Stephan</p> <p><br> </p> </body> </html> --------------nlyEUxqc7cJXlztHYnhOHnno--
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