[Mesa-dev] [PATCH 08/11] i965: perf: snapshot RPSTAT1 register

[Chris Wilson]

Quoting Lionel Landwerlin (2018-03-08 15:42:53)
> +static void
> +read_gt_frequency(struct brw_context *brw,
> +                  struct brw_perf_query_object *obj)
> +{
> +   const struct gen_device_info *devinfo = &brw->screen->devinfo;
> +   uint32_t *start_reg = obj->oa.map + MI_FREQ_START_OFFSET_BYTES,
> +      *end_reg = obj->oa.map + MI_FREQ_END_OFFSET_BYTES;
> +
> +   switch (devinfo->gen) {
> +   case 7:
> +   case 8:
> +      obj->oa.gt_frequency[0] =
> +         ((start_reg[0] & GEN6_RPSTAT1_CURR_GT_FREQ_MASK) >>
> +          GEN6_RPSTAT1_CURR_GT_FREQ_SHIFT) * 50ULL;
> +      obj->oa.gt_frequency[1] =
> +         ((end_reg[0] & GEN6_RPSTAT1_CURR_GT_FREQ_MASK) >>
> +          GEN6_RPSTAT1_CURR_GT_FREQ_SHIFT) * 50ULL;

I was just thinking this was the wrong frequency conversion for byt/bsw,
but then they don't have RPSTAT1 either. Is the OA only for big core?
-Chris