On Mon, Mar 03, 2014 at 06:23:16PM +0100, Andi Kleen wrote: > > Hmm, so based on Andi's reply, I am assuming you are running on a Westmere > > (or Nehalem) due to the lack of mem-stores. > > > > If you don't have mem-stores, this tool isn't going to work. The tool can > > only detect contention when sampling reads _and_ writes to the same > > addresses. > > On these CPUs you could simply sample on HITM. You won't get addresses, > but at least IPs and call stacks.
Heh. I never thought about that. And sure enough a quick test with mem-stores commented out produced the same results (minus the stores). One would just have to 'figure' out what cacheline offsets are causing the HITMs. Cheers, Don -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
