[Intel-gfx] Debugging verbosity with mouse pointer movement

Sat Nov 28 07:53:56 PST 2015

On Sat, Nov 28, 2015 at 02:57:17PM +0000, Greg Stark wrote:
> I set set the debugging flag as suggested by the online docs for
> reporting GPU hang bugs and I'm seeing the logs fill up with messages.
> I didn't think that was surprising but actually poking around it looks
> like they don't get lots of messages generally, all the messages are
> generated by the mouse pointer moving. IIs it expected that moving the
> mouse pointer would generate lots of debugging output? I'm guessing if
> that's the only output it's intended that the debugging logs only
> generate messages on less common events?

Use drm.debug=0xe unless you really want to debug the atomic code (which
is where all this spew comes from).

> 
> # cat /proc/cmdline
> BOOT_IMAGE=/vmlinuz-4.3.0-trunk-amd64 root=/dev/mapper/pixel-root ro
> quiet drm.debug=0x1e log_buf_len=1M
> 
> These debug logs get generated for every movement of the mouse pointer:
> 
> Nov 28 14:51:12 pixel kernel: [  234.942620]
> [drm:drm_atomic_state_init] Allocated atomic state ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942626]
> [drm:drm_atomic_get_plane_state] Added [PLANE:20] ffff88014892edc0
> state to ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942628]
> [drm:drm_atomic_get_crtc_state] Added [CRTC:21] ffff8800a6fb9c00 state
> to ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942630]
> [drm:drm_atomic_set_crtc_for_plane] Link plane state ffff88014892edc0
> to [CRTC:21]
> Nov 28 14:51:12 pixel kernel: [  234.942631]
> [drm:drm_atomic_set_fb_for_plane] Set [FB:47] for plane state
> ffff88014892edc0
> Nov 28 14:51:12 pixel kernel: [  234.942632]
> [drm:drm_atomic_check_only] checking ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942638]
> [drm:intel_plane_atomic_calc_changes] [CRTC:21] has [PLANE:20] with fb
> 47
> Nov 28 14:51:12 pixel kernel: [  234.942639]
> [drm:intel_plane_atomic_calc_changes] [PLANE:20] visible 0 -> 1, off
> 0, on 1, ms 0
> Nov 28 14:51:12 pixel kernel: [  234.942640] [drm:drm_atomic_commit]
> commiting ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942662]
> [drm:drm_atomic_state_default_clear] Clearing atomic state
> ffff8800a5fc2400
> Nov 28 14:51:12 pixel kernel: [  234.942663]
> [drm:drm_atomic_state_free] Freeing atomic state ffff8800a5fc2400
> 
> Nov 28 14:51:13 pixel kernel: [  235.217222]
> [drm:drm_atomic_state_init] Allocated atomic state ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217226]
> [drm:drm_atomic_get_plane_state] Added [PLANE:20] ffff88009671a280
> state to ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217228]
> [drm:drm_atomic_get_crtc_state] Added [CRTC:21] ffff880149d5c400 state
> to ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217229]
> [drm:drm_atomic_set_crtc_for_plane] Link plane state ffff88009671a280
> to [CRTC:21]
> Nov 28 14:51:13 pixel kernel: [  235.217231]
> [drm:drm_atomic_set_fb_for_plane] Set [FB:47] for plane state
> ffff88009671a280
> Nov 28 14:51:13 pixel kernel: [  235.217232]
> [drm:drm_atomic_check_only] checking ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217237]
> [drm:intel_plane_atomic_calc_changes] [CRTC:21] has [PLANE:20] with fb
> 47
> Nov 28 14:51:13 pixel kernel: [  235.217238]
> [drm:intel_plane_atomic_calc_changes] [PLANE:20] visible 1 -> 1, off
> 0, on 0, ms 0
> Nov 28 14:51:13 pixel kernel: [  235.217240] [drm:drm_atomic_commit]
> commiting ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217253]
> [drm:drm_atomic_state_default_clear] Clearing atomic state
> ffff880148b49200
> Nov 28 14:51:13 pixel kernel: [  235.217255]
> [drm:drm_atomic_state_free] Freeing atomic state ffff880148b49200
> 
> Nov 28 14:51:13 pixel kernel: [  235.250970]
> [drm:drm_atomic_state_init] Allocated atomic state ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250973]
> [drm:drm_atomic_get_plane_state] Added [PLANE:20] ffff8800a6ce9dc0
> state to ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250975]
> [drm:drm_atomic_get_crtc_state] Added [CRTC:21] ffff8800a6fb9c00 state
> to ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250976]
> [drm:drm_atomic_set_crtc_for_plane] Link plane state ffff8800a6ce9dc0
> to [CRTC:21]
> Nov 28 14:51:13 pixel kernel: [  235.250978]
> [drm:drm_atomic_set_fb_for_plane] Set [FB:47] for plane state
> ffff8800a6ce9dc0
> Nov 28 14:51:13 pixel kernel: [  235.250979]
> [drm:drm_atomic_check_only] checking ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250982]
> [drm:intel_plane_atomic_calc_changes] [CRTC:21] has [PLANE:20] with fb
> 47
> Nov 28 14:51:13 pixel kernel: [  235.250984]
> [drm:intel_plane_atomic_calc_changes] [PLANE:20] visible 1 -> 1, off
> 0, on 0, ms 0
> Nov 28 14:51:13 pixel kernel: [  235.250985] [drm:drm_atomic_commit]
> commiting ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250995]
> [drm:drm_atomic_state_default_clear] Clearing atomic state
> ffff880148b55000
> Nov 28 14:51:13 pixel kernel: [  235.250997]
> [drm:drm_atomic_state_free] Freeing atomic state ffff880148b55000
> 
> Nov 28 14:51:14 pixel kernel: [  236.676789]
> [drm:drm_atomic_state_init] Allocated atomic state ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676794]
> [drm:drm_atomic_get_plane_state] Added [PLANE:20] ffff88009671a280
> state to ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676797]
> [drm:drm_atomic_get_crtc_state] Added [CRTC:21] ffff88009de0a400 state
> to ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676799]
> [drm:drm_atomic_set_crtc_for_plane] Link plane state ffff88009671a280
> to [NOCRTC]
> Nov 28 14:51:14 pixel kernel: [  236.676800]
> [drm:drm_atomic_set_fb_for_plane] Set [NOFB] for plane state
> ffff88009671a280
> Nov 28 14:51:14 pixel kernel: [  236.676802]
> [drm:drm_atomic_check_only] checking ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676807]
> [drm:intel_plane_atomic_calc_changes] [CRTC:21] has [PLANE:20] with fb
> -1
> Nov 28 14:51:14 pixel kernel: [  236.676808]
> [drm:intel_plane_atomic_calc_changes] [PLANE:20] visible 1 -> 0, off
> 1, on 0, ms 0
> Nov 28 14:51:14 pixel kernel: [  236.676810] [drm:drm_atomic_commit]
> commiting ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676830]
> [drm:drm_atomic_state_default_clear] Clearing atomic state
> ffff8801494c0600
> Nov 28 14:51:14 pixel kernel: [  236.676831]
> [drm:drm_atomic_state_free] Freeing atomic state ffff8801494c0600
> 
> -- 
> greg
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> Intel-gfx at lists.freedesktop.org
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-- 
Ville Syrjälä
Intel OTC