tip-bot for Peter Zijlstra <[email protected]> writes: > + > + at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base; > + top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index; > > ds->pebs_index = ds->pebs_buffer_base; > > + n = (top - at) / x86_pmu.pebs_record_size;
This adds a full slow division to the PEBS hot path. Does not seem like a improvement to me. -Andi -- [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
