Kenneth Graunke <kenn...@whitecape.org> writes: > Ironlake's counters are always enabled; userspace can simply send a > MI_REPROT_PERF_COUNT packet to take a snapshot of them. This makes it > easy to implement. > > The counters are documented in the source code for the intel-gpu-tools > intel_perf_counters utility. > > Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
> +/**
> + * Is a performance monitor result available?
> + */
> +static GLboolean
> +brw_is_perf_monitor_result_available(struct gl_perf_monitor_object *m)
> +{
> + struct brw_perf_monitor_object *monitor = brw_perf_monitor(m);
> + return !m->Active && monitor->gpu_facing_bo &&
> + !drm_intel_bo_busy(monitor->gpu_facing_bo);
> +}
This also needs to check for !drm_intel_bo_references by the batch --
otherwise if the batch hasn't flushed, we'll report result_available
when it isn't ready.
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