Roland Dreier writes: > FWIW, Nehalem EX actually goes to 8 cores/16 threads per socket. But > worrying about 32-bit performance on Nehalem is a little silly -- this > simplest solution is simply to run a 64-bit kernel.
I'm not worried about ANY x86 processor, 32-bit or 64-bit, in fact, since x86 already has an atomic64_t implementation for both 32-bit and 64-bit. It is interesting, though, that arch/x86/include/asm/atomic_32.h unconditionally uses cmpxchg8b to implement atomic64_t, but I thought that cmpxchg8b didn't exist in processors prior to the Pentium. Presumably you can't use perf_counters on a 386 or 486. Paul. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
