Messages in this thread | | | Date | Wed, 9 Dec 2015 09:15:04 -0800 | Subject | Re: [Questions] perf c2c: What's the current status of perf c2c? | From | Stephane Eranian <> |
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Hi,
On Wed, Dec 9, 2015 at 8:58 AM, Andi Kleen <andi@firstfloor.org> wrote: >> > the plan for me is to to use it some more to prove it's useful >> > and kick it to be merged with perf at some point >> >> So I never really liked the c2c tool because it was so narrowly >> focussed, it only works on NUMA thingies IIRC. > > It should work on all systems with an Intel Core (not Atom) > > However it was never clear to me if the tool was any better > than simply sampling for > > mem_load_uops_l3_hit_retired.xsnp_hitm:pp (local socket) > mem_load_uops_l3_miss_retired.remote_hitm:pp (remote socket) > > which gives you instructions that reference bouncing cache lines. > If I recall the c2c tool is giving you more than the bouncing line. It shows you the offset inside the line and the participating CPUs.
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