Yes, but the very nature of the discussion concerns VMs, where the point is to multiplex the physical CPUs into multiple VMs in user-controllable chunks. A VM with one vCPU is perfectly reasonable and normal.
I've found that having multiple cores available can speed up a desktop, and certain classes of cpu-bound server applications, and not much else. Those applications are not many; databases (sometimes), web servers (sometimes), application servers (often). The fact my router has 8 cores available doesn't really help it very much. (Maybe BGP converges a little bit faster?) Ditto for my DNS servers, my mail server, my proxy server, etc. So, I would like to know what application Giancarlo has where he actually notices the lack of multiple cores. -Adam On April 17, 2014 12:23:44 PM CDT, Otto Moerbeek <[email protected]> wrote: >On Thu, Apr 17, 2014 at 12:22:44PM -0500, Adam Thompson wrote: > >> Given the single-threaded nature of much of the kernel, what >applications do you run where multiple CPUs makes much of a difference >to OpenBSD? > > >Come on, a machine runs multiple processes... > >> >> Also, switching from IDE to any of the supported SCSI, SAS or SATA >disk types also produces a noticeable improvement. I'm not sure if >those are available in every KVM implementation or just the >Proxmox-integrated version... IIRC they're available in RHEV too, so >most likely they're standard. > >> >> -Adam >> >> On April 17, 2014 11:34:19 AM CDT, Giancarlo Razzolini ><[email protected]> wrote: >> >Em 17-04-2014 07:34, Abel Abraham Camarillo Ojeda escreveu: >> >> On Thu, Apr 17, 2014 at 5:31 AM, Brandon Mercer >> >> <[email protected]> wrote: >> >>> It will take me about that long to newfs the 10 kvm's I plan on >> >using ;) >> >>> >> >>> On Thu, Apr 17, 2014 at 5:09 AM, Otto Moerbeek <[email protected]> >> >wrote: >> >>>> On Wed, Apr 16, 2014 at 11:16:00PM -0700, Philip Guenther wrote: >> >>>> >> >>>>> On Thursday, April 17, 2014, Otto Moerbeek <[email protected]> >wrote: >> >>>>> ... >> >>>>> >> >>>>>> But bear in mind that ffs2 has more overhead in terms of >> >metadata. >> >>>>>> IMO, making it the default is not a good idea. >> >>>>>> >> >>>>> You have fewer than 24 years left to enjoy FFS v1... >> >>>> and I plan to enjoy every minute of that period! >> >>>> >> >>>> -Otto >> >>>> >> >>>> >> >> I found it really fast to work with kvm/openbsd if you use -drive >> >> ...,if=virtio ... >> >> like 4x-5x times faster than if=ide -the default- >> >> >> >I use everything virtio and the performance difference is quite >> >notable. >> >The only complain is that openbsd won't see more than one processor, >no >> >matter what you do. >> > >> >-- >> >Giancarlo Razzolini >> >GPG: 4096R/77B981BC >> >> -- >> Sent from my Android device with K-9 Mail. Please excuse my brevity. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
