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Date: Fri, 25 Jul 2014 12:55:41 +1000 From: Michael Ellerman <mpe@...erman.id.au> To: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com> Cc: andi@...stfloor.org, Arnaldo Carvalho de Melo <acme@...nel.org>, Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH 2/2] powerpc/perf: Implement get_cpu_str() On Thu, 2014-07-24 at 00:47 -0700, Sukadev Bhattiprolu wrote: > [RFC PATCH 2/2] powerpc/perf: Implement get_cpu_str() > > get_cpu_str() returns a string identifying the CPU type on the system. > This string is then used to locate a cached JSON file which defines > the list of PMU events supported by the CPU. > > Eg: if get_cpu_str() returns "power8", the perf tool would refer to the > PMU events defined in ~/.cache/pmu-events/power8.json. Hi Suka, I know we talked internally a while ago about using AT_BASE_PLATFORM, but that was before I looked closely at Andi's patches last week. I think we're better off using the PVR directly, it's less magic, it gives us more flexibility and it's easier to get at. So get_cpu_str() would just return eg. "004b0201-core". We would handle the mapping of that name to an event file either in the download script via the mapfile, or just by using symlinks. cheers -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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