A new optional parameter "-d msecs" allows to specify a delay before the surface attach/damage/commit to shift the point in time when a surface update is committed.
This allows to test how different client timings interact with the compositors repaint timing. Suggested by Pekka Paalanen. Signed-off-by: Mario Kleiner <[email protected]> --- clients/presentation-shm.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/clients/presentation-shm.c b/clients/presentation-shm.c index cf4517c..cafea40 100644 --- a/clients/presentation-shm.c +++ b/clients/presentation-shm.c @@ -101,6 +101,7 @@ struct window { int num_buffers; int next; int refresh_nsec; + int commit_delay_msecs; struct wl_callback *callback; struct wl_list feedback_list; @@ -201,19 +202,21 @@ static const struct wl_shell_surface_listener shell_surface_listener = { static struct window * create_window(struct display *display, int width, int height, - enum run_mode mode) + enum run_mode mode, int commit_delay_msecs) { struct window *window; char title[128]; int ret; snprintf(title, sizeof(title), - "presentation-shm: %s", run_mode_name[mode]); + "presentation-shm: %s [Delay %i msecs]", run_mode_name[mode], + commit_delay_msecs); window = calloc(1, sizeof *window); if (!window) return NULL; + window->commit_delay_msecs = commit_delay_msecs; window->mode = mode; window->callback = NULL; wl_list_init(&window->feedback_list); @@ -490,6 +493,13 @@ window_create_feedback(struct window *window, uint32_t frame_stamp) &feedback_listener, feedback); feedback->frame_no = seq; + + /* Delay by given msecs to test effects of compositor scheduling */ + if (window->commit_delay_msecs > 0) { + struct timespec delay = { 0, window->commit_delay_msecs * 1e6 }; + clock_nanosleep(window->display->clk_id, 0, &delay, NULL); + } + clock_gettime(window->display->clk_id, &feedback->commit); feedback->frame_stamp = frame_stamp; feedback->target = feedback->commit; @@ -810,7 +820,8 @@ usage(const char *prog, int exit_code) " -f\trun in feedback mode (default)\n" " -i\trun in feedback-idle mode; sleep 1s between frames\n" " -p\trun in low-latency presentation mode\n" - "and 'options' may include\n", + "and 'options' may include\n" + " -d msecs\tdelay by given milliseconds before commit\n\n", prog); fprintf(stderr, "Printed timing statistics, depending on mode:\n" @@ -835,6 +846,7 @@ main(int argc, char **argv) int ret = 0; enum run_mode mode = RUN_MODE_FEEDBACK; int i; + int commit_delay_msecs = 0; for (i = 1; i < argc; i++) { if (strcmp("-f", argv[i]) == 0) @@ -843,12 +855,16 @@ main(int argc, char **argv) mode = RUN_MODE_FEEDBACK_IDLE; else if (strcmp("-p", argv[i]) == 0) mode = RUN_MODE_PRESENT; + else if ((strcmp("-d", argv[i]) == 0) && (i + 1 < argc)) { + i++; + commit_delay_msecs = atoi(argv[i]); + } else usage(argv[0], EXIT_FAILURE); } display = create_display(); - window = create_window(display, 250, 250, mode); + window = create_window(display, 250, 250, mode, commit_delay_msecs); if (!window) return 1; -- 1.9.1 _______________________________________________ wayland-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/wayland-devel
