While the Sandybridge PRM doesn't have any documentation on the GPU's
performance counters, a lot of information can be gleaned from the older
Ironlake PRM. Oddly, none of the information documented there actually
appears to apply to Ironlake. However, it apparently works just great
on Sandybridge.
Since this information has all been publicly available on the internet
for around three years, we can use it.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
We want to support this tool on more platforms. This lays the
groundwork for making that possible.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This reads the GPU's performance counters via MI_REPORT_PERF_COUNT and
prints them in a top-style interface. While it can be useful in and of
itself, it also documents the performance counters and lets us verify
that they're working.
Currently, it only supports Ironlake.
v2 [Ken]: Rebase on master and fix compilation failures; make it abort
on non-Ironlake platforms to avoid GPU hangs; rename from 'chaps' to
intel_perf_counters since that acronym isn't used any longer; write the
above commit message.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
