[Intel-gfx] Debugging verbosity with mouse pointer movement

Sat Nov 28 06:57:17 PST 2015

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?

# 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