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The open source OpenXR runtime
u/pacing: Add minimum wake period
Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2293>
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-1
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-1
src/xrt/auxiliary/util/u_pacing_app.c
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-1
src/xrt/auxiliary/util/u_pacing_app.c
···
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DEBUG_GET_ONCE_FLOAT_OPTION(min_app_time_ms, "U_PACING_APP_MIN_TIME_MS", 1.0f)
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DEBUG_GET_ONCE_FLOAT_OPTION(min_margin_ms, "U_PACING_APP_MIN_MARGIN_MS", 2.0f)
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DEBUG_GET_ONCE_BOOL_OPTION(use_min_frame_period, "U_PACING_APP_USE_MIN_FRAME_PERIOD", false)
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DEBUG_GET_ONCE_BOOL_OPTION(immediate_wait_frame_return, "U_PACING_APP_IMMEDIATE_WAIT_FRAME_RETURN", false)
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#define UPA_LOG_T(...) U_LOG_IFL_T(debug_get_log_option_log_level(), __VA_ARGS__)
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#define UPA_LOG_D(...) U_LOG_IFL_D(debug_get_log_option_log_level(), __VA_ARGS__)
···
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// How long we think the frame should take.
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int64_t frame_time_ns = total_app_time_ns(pa);
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// When should the client wake up.
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int64_t wake_up_time_ns = predict_ns - total_app_and_compositor_time_ns(pa);
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int64_t wake_up_time_ns;
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/*
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* We can either wake the app to render as fast as possible or at the
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* predicted time period minus some app and compositor time.
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* The former uses substantially more power but is sometimes useful in debugging
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*.or as a workaround.
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*/
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if (debug_get_bool_option_immediate_wait_frame_return()) {
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wake_up_time_ns = now_ns;
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} else {
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wake_up_time_ns = predict_ns - total_app_and_compositor_time_ns(pa);
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}
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// When the client's GPU work should have completed.
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int64_t gpu_done_time_ns = predict_ns - total_compositor_time_ns(pa);
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