Date: Sun, 14 Feb 2021 13:32:36 -0800 (PST) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Shawn Webb <shawn.webb@hardenedbsd.org> Cc: Simon Connah <scopensource@gmail.com>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Subject: Re: Any plans to increase the maximum number of virtual CPUs above 16? Message-ID: <202102142132.11ELWaLe078598@gndrsh.dnsmgr.net> In-Reply-To: <20210214160337.6vn3xpxj6c6eryvt@mutt-hbsd>
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-- Start of PGP signed section. > On Tue, Nov 27, 2018 at 10:06:52PM +0000, Simon Connah wrote: > > I was reading the bhyve man page and noticed that it said the maximum number > > of virtual CPUs is limited to 16. With AMD Epyc being out with 32 cores and > > 64 threads per CPU and being able to have 2 of them in one system this > > number seems rather low by modern standards. > > > > Are there any plans to increase this number to something like 32 virtual > > CPUs? > > I'm running into this. I have a server that can handle way more than > 16 vCPUs. I know this topic has been talked about several times, and > theoretical discussions keep taking place. > > A bit more than two years later, and this is still a topic of > discussion. I'm curious if anyone has a patch to punish me with. I'm > very happy to be a guinea pig. Several in phab, probably need rebased, its my WIP to eliminate the compile time constant. If you need more vCPU's it is just a recompile of the kernel, libvmm, and bhyve(8) iirc. Up the value of MAX_VCPU. https://reviews.freebsd.org/D10070 https://reviews.freebsd.org/D18816 https://reviews.freebsd.org/D18846 I believe all the fixes that allow you to increase VM_MAXCPU up to something like 240 have all been committed. > Thanks, > > -- > Shawn Webb > Cofounder / Security Engineer > HardenedBSD > > GPG Key ID: 0xFF2E67A277F8E1FA > GPG Key Fingerprint: D206 BB45 15E0 9C49 0CF9 3633 C85B 0AF8 AB23 0FB2 > https://git-01.md.hardenedbsd.org/HardenedBSD/pubkeys/src/branch/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc -- End of PGP section, PGP failed! -- Rod Grimes rgrimes@freebsd.org
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