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a871eabced
Perfetto is allowed to choose it's own default clock, and before this we just assumed the presentation times reported by the compositor are the same as perfetto's internal clock, which is not always the case. I got a nasty trace where all the wayland presents were in the wrong location. This fixes that by asking the compositor which clock it uses, then passing that along to perfetto.
A workaround for my compositor was setting use_monotonic_clock=true in the perfetto config, as my compositor (and I suspect most others) use the monotonic clock for presentation timestamps. However, asking the compositor is definitely the most correct solution.
I added a clock param to `MESA_TRACE_TIMESTAMP_{BEGIN,END}`, as it's only use that I could see was in wsi_common_wayland, and in general it seems good to be careful about which clock tracing timestamps come from.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31779>
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.