On Mon, Dec 07, 2015 at 02:28:18PM -0800, Harish Chegondi wrote: > Knights Landing core is based on Silvermont core with several differences. > Like Silvermont, Knights Landing has 8 pairs of LBR MSRs. However, the > LBR MSRs addresses match those of the Xeon cores' first 8 pairs of LBR MSRs
> +/* Knights Landing */ > +void intel_pmu_lbr_init_knl(void) > +{ > + x86_pmu.lbr_nr = 8; > + x86_pmu.lbr_tos = MSR_LBR_TOS; > + x86_pmu.lbr_from = MSR_LBR_NHM_FROM; > + x86_pmu.lbr_to = MSR_LBR_NHM_TO; > + > + x86_pmu.lbr_sel_mask = LBR_SEL_MASK; > + x86_pmu.lbr_sel_map = snb_lbr_sel_map; Also, unlike Silvermont, this thing seems to have hardware LBR filters. So would it not be more accurate to say the KNL has a big core LBR instead? (Note that this LBR setup isn't specific to Xeon's, all of the Core chips have this, including the client parts). > + pr_cont("8-deep LBR, "); > +} -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/