Thanks for your info, but your message leaves open exactly the two questions that I was asking: On Wed, 2009-08-26 at 12:15 -0700, Rick Stevens wrote: > Jonathan Ryshpan wrote: > > Configuring the kernel I came across a choice between generic-x86_64 > > processors, and the Opteron/Athlon/Hammer/K8 processors. My system has > > a 4-core Phenom processor. Questions: > > > > 1. Is the Phenom compatible with the Opteron/etc? I.e. if I > > configure for the Opteron, will my kernel be reliable? (This is > > not as easy to find out as I thought.) > > To my knowledge, yes. It's certainly compatible with the Athlon. I run > a Phenom quad-core as well, but I just use the off-the-shelf x86_64 > kernel. Works fine. I run the same kernel myself, built for the generic-x86_64 CPU. The question is are there enhancements for the Athlon above the generic, which are not compatible with the Phenom. I think not, but I haven't been able to get any firm info yet. > > 2. How much of a performance advantage is there to configuring for > > the Opteron as against the generic? > > I don't know that you'd notice any significant difference with a normal > work load. If you were doing heavy I/O or number crunching, then you > might see some difference, but not enough to really bother making a > custom kernel. Again, I suspect you're right about both things. I have to build another kernel to chenge the preemption rule from VOLUNTARY_PREEMPT to PREEMPT, so this looked like a natural change to add (if it works). Thanks - jon -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
