https://bugs.freedesktop.org/show_bug.cgi?id=38800 --- Comment #12 from Simon Farnsworth <simon.farnsworth@xxxxxxxxxxxx> 2011-07-05 05:18:12 PDT --- I can't persuade the tracepoints Michel recommended to do anything - no data gets recorded by perf when I run my test programs. I've attempted to record the data with: perf script record -a -e radeon:radeon_bo_create -e radeon:radeon_fence_emit -e radeon:radeon_fence_retire -e radeon:radeon_fence_wait_begin -e radeon:radeon_fence_wait_end -e drm:drm_vblank_event -e drm:drm_vblank_event_queued -e drm:drm_vblank_event_delivered I looked at perf record/perf report output, to find the biggest non-idle CPU user, and got to r600_fence_finish being 50% of the overall CPU usage, while still not using more than 10% CPU total at any time; despite having frame pointers, I can't get perf to give me a call trace telling me where it's being called from (I did remember the -g option to perf). Checking dmesg when drm.debug is set to 0xf shows me that I'm calling the radeon_crtc_page_flip function through ioctl every 30 milliseconds or so. Looking in detail (I'll attach the snippet I'm analyzing), I appear to call the flip ioctl, then wait until after the flip has completed before I continue on to waiting for the next vblank. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
