On Wed, Nov 14, 2018 at 01:24:15PM -0800, kan.li...@linux.intel.com wrote: > From: Kan Liang <kan.li...@linux.intel.com> > > Perf tools cannot find the proper event list for Cascadelake server. > Because Cascadelake server and Skylake server have the same CPU model > number, which are used by 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, which using environment string "PERF_CPUID" without stepping > on Skylake server, will be broken. If so, users must fix their scripts. > > Signed-off-by: Kan Liang <kan.li...@linux.intel.com>
Reviewed-by: Jiri Olsa <jo...@kernel.org> thanks, jirka
