Messages in this thread Patch in this message | | | Date | Tue, 5 Aug 2014 17:17:55 -0700 | From | Sukadev Bhattiprolu <> | Subject | [PATCH] powerpc/perf: Implement get_cpu_str() |
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powerpc/perf: Implement get_cpu_str()
With a file like ~/.cache/pmu-events/004d0100-core.json describing Power8 PMU events, we would need to run:
perf stat \ --events-file ~/.cache/pmu-events/004d0100-core.json \ -e PM_CYC sleep 1
With this get_cpu_str(), on Powerpc, we can skip the --events-file option and run:
perf stat -e PM_CYC sleep 1
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> --- Note: This patch is based on Andi Kleen's recent patchset
https://lkml.org/lkml/2014/7/30/693
Changelog[v2]: [Michael Ellerman]: Use PVR instead of AUXV variables
tools/perf/arch/powerpc/util/header.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c index 6c1b8a7..1bb400e8 100644 --- a/tools/perf/arch/powerpc/util/header.c +++ b/tools/perf/arch/powerpc/util/header.c @@ -6,6 +6,7 @@ #include "../../util/header.h" #include "../../util/util.h" +#include "../../util/jevents.h" #define mfspr(rn) ({unsigned long rval; \ asm volatile("mfspr %0," __stringify(rn) \ @@ -32,3 +33,14 @@ get_cpuid(char *buffer, size_t sz) } return -1; } + +char * +get_cpu_str(void) +{ Changelog[v2]: [Michael Ellerman]: Use PVR instead of AUXV variables + char *bufp; + + if (asprintf(&bufp, "%.8lx-core", mfspr(SPRN_PVR)) < 0) + bufp = NULL; + + return bufp; +} -- 1.8.3.1
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