On Thu, Jun 30, 2016 at 2:53 PM, Jan Kratochvil <jan.kratochvil@xxxxxxxxxx> wrote: > On Thu, 30 Jun 2016 12:12:37 +0200, Dan Horák wrote: >> For ppc64 (the big endian POWER) the base is set by the toolchain >> default which is Power4/ppc970. When Power7 came we were asked what are >> the options to take the advantage of these CPUs, 3 generations newer >> than the base. The solution was the introduction of ppc64p7 subarch > > But now there is ppc64le for >=Power8. So <=Power7 can use ppc64 but newer >>=Power8 hardware does use ppc64le which is already Power8 optimized. > So isn't this problem (somehow temporarily) solved for now? > > Or are really the Power7 (and not yet Power8) machines the real problem? No your confusing endian with CPU features. We support both Big Endian (ppc64) and Little Endian (ppc64le) options for the Power64 architecture. Both can run on Power8 hardware, in fact the builder VMs run like with with both BE and LE VMs running on the same physical Power8 host side by. There's shortly going to also be Power9 [1] with options that need optimisation to make the most of new architectural enhancements which will be primarily focused towards ppc64le (but will also work on ppc64) but we don't want to exclude Power8 from ppc64le. Peter [1] http://www.nextplatform.com/2016/04/18/power9-will-bring-competition-datacenter-compute/ -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://lists.fedoraproject.org/admin/lists/devel@xxxxxxxxxxxxxxxxxxxxxxx
