On Mon, Jul 27, 2020 at 02:54:25PM +0100, Stuart Henderson wrote: > Replying back on-list, I don't do support-type mails off-list, and other > people know more about sparc64 hardware than me. > > On 2020/07/26 22:38, Kihaguru Gathura wrote: > > Hi Stuart, > > > > For legacy, single-core CPU's such as Sparc64 V. > > Would OpenBSD cope well with more number of CPU's or less as in previous > > case? > > > > Example. > > > > 2 CPU's (primepower 250) -> 4 CPU's (PrimePower 450) -> 8 CPU's(PrimePower > > 650) -> 16 CPU's > > (PrimePower 850) -> 32 CPU's (Primepower 1500) > > It depends on the workload. I'd have thought for most things the max > really usable at the moment is probably somewhere in the region of 4-8 > cpu cores before kernel locking gets in the way too much. > > FWIW sparc64 ports builds are now done on T4 and they're really fast. > I think (but am not 100% sure) that this is carved into ldoms so the > number of cores visible to each OpenBSD instance is limited (so > contention between cores in the kernel is also limited).
The primepower 250 are decent and IIRC you can get dual core SPARC64-VI CPUs for those. They use a fair amount of power. The bigger irons are fun but honestly the weight and power consumption is just not worth it. A primepower 250 is compareable with a fast v215. At least that is my experience. Better to look for an M3000 or M4000 or as suggested for a T4-1. Also make sure you get good CPUs in them (esp. the M4000 comes with a few options). -- :wq Claudio
