From 3b54411a4485c9f1d50f003810ecfceca82a09ae Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Wed, 14 Nov 2018 13:24:15 -0800 Subject: perf vendor events: Add stepping in CPUID string for x86 The perf tools cannot find the proper event list for the Cascadelake server. Because the Cascadelake server and the Skylake server have the same CPU model number, which are used by the perf tools to find the event list. The stepping for Skylake server is up to 4. The stepping for Cascadelake server starts from 5. The stepping can be used to distinguish between them. The stepping is added in get_cpuid_str(). The stepping information for Skylake server is updated in mapfile.csv. A x86 specific strcmp_cpuid_cmp() function is added to handle two CPUID formats in mapfile.csv, "vendor-family-model-stepping" and "vendor-family-model": - If a cpuid-regular-expression from the mapfile.csv using the new stepping format, a cpuid-string generated on the machine must include stepping. Otherwise, it is a mismatch. - If the cpuid-regular-expression using the old non-stepping format, the stepping in the cpuid-string will be ignored. The script, using environment string "PERF_CPUID" without stepping on Skylake server, will be broken. If so, users must fix their scripts. Committer notes: Fixed this build error on centos:6 and debian:7: arch/x86/util/header.c: In function 'is_full_cpuid': arch/x86/util/header.c:82:39: error: declaration of 'cpuid' shadows a global declaration [-Werror=shadow] arch/x86/util/header.c:12:1: error: shadowed declaration is here [-Werror=shadow] arch/x86/util/header.c: In function 'strcmp_cpuid_str': arch/x86/util/header.c:98:56: error: declaration of 'cpuid' shadows a global declaration [-Werror=shadow] arch/x86/util/header.c:12:1: error: shadowed declaration is here [-Werror=shadow] cc1: all warnings being treated as errors Signed-off-by: Kan Liang Reviewed-by: Jiri Olsa Cc: Andi Kleen Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20181114212416.15665-1-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/pmu-events/arch/x86/mapfile.csv | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf/pmu-events') diff --git a/tools/perf/pmu-events/arch/x86/mapfile.csv b/tools/perf/pmu-events/arch/x86/mapfile.csv index 7e3cce3bcf3b..183a42c99251 100644 --- a/tools/perf/pmu-events/arch/x86/mapfile.csv +++ b/tools/perf/pmu-events/arch/x86/mapfile.csv @@ -31,4 +31,4 @@ GenuineIntel-6-2A,v15,sandybridge,core GenuineIntel-6-2C,v2,westmereep-dp,core GenuineIntel-6-25,v2,westmereep-sp,core GenuineIntel-6-2F,v2,westmereex,core -GenuineIntel-6-55,v1,skylakex,core +GenuineIntel-6-55-[01234],v1,skylakex,core -- cgit