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Date: Sat, 20 Mar 2010 14:41:41 +0100
From: Karl Vogel <karl.vogel@...il.com>
To: linux-kernel@...r.kernel.org
Subject: i915 lockup / extreme delay
I have been experiencing a very sluggish X server right after starting
my laptop. The effect goes away after a few minutes, so it was rather
hard to track down.
Recently after updating WINE to a newer release, I've been able to
trigger the effect by running a certain game under wine on a remote
computer and using VirtualGL to transport the GL display to my laptop.
As I first thought the issue was somewhere with wine/virtualgl, I posted
the question to the virtualgl mailing list. The thread is here:
http://thread.gmane.org/gmane.comp.video.opengl.virtualgl.user/170
But after some further investigation, it seems the issue is with the
i915 driver.
The 'effect' is that only the mouse pointer works in the X server. The
cpu usage on the laptop during the sluggishness is minimal. When I
suspend the game with winedbg, the X server slowly becomes responsive again.
The output from latencytop seems to point to i915 being the culprit:
Cause Maximum Percentage
[i915_gem_sw_finish_ioctl] 3880.2 msec 51.0 %
Throttling GPU while waiting for commands 1337.6 msec 12.1 %
[i915_gem_set_domain_ioctl] 739.6 msec 10.3 %
mmaping memory 275.0 msec 0.9 %
Scheduler: waiting for cpu 106.1 msec 3.8 %
Executing raw SCSI command 105.4 msec 0.8 %
fsync() on a file (type 'F' for details) 84.5 msec 0.5 %
[i915_gem_do_execbuffer] 19.7 msec 0.4 %
[i915_gem_pwrite_ioctl] 19.7 msec 0.4 %
--
Cause Maximum Percentage
[i915_gem_sw_finish_ioctl] 4181.0 msec 57.5 %
[i915_gem_set_domain_ioctl] 3395.2 msec 35.0 %
Throttling GPU while waiting for commands 742.0 msec 2.7 %
[i915_gem_create_ioctl] 19.7 msec 0.1 %
[i915_gem_busy_ioctl] 19.7 msec 0.4 %
[i915_gem_pwrite_ioctl] 19.6 msec 0.3 %
[i915_gem_madvise_ioctl] 19.6 msec 1.4 %
[i915_gem_do_execbuffer] 19.4 msec 0.1 %
[i915_do_wait_request] 5.0 msec 0.2 %
--
Cause Maximum Percentage
[i915_gem_set_domain_ioctl] 4609.5 msec 32.8 %
[i915_gem_sw_finish_ioctl] 3316.7 msec 52.0 %
[i915_gem_create_ioctl] 744.1 msec 3.0 %
synchronous write 345.9 msec 1.3 %
Executing a program 109.7 msec 0.4 %
fsync() on a file (type 'F' for details) 87.6 msec 1.0 %
Page fault 86.1 msec 0.8 %
Writing a page to disk 20.1 msec 0.4 %
[i915_gem_madvise_ioctl] 19.7 msec 3.4 %
These were taken on a Fedora 12 kernel v2.6.32.9-70
I also tried to reproduce it with the latest kernel v2.6.34-rc2, but
it's much worse with that one, since it causes the laptop to completely
lockup when I start the game!
I've tried to enable some extra kernel debug options and also setup
netconsole to see if there is anything reported before the lockup, but
unfortunately there's no output.
--
Some hardware details:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series
Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA
controller])
Subsystem: Dell Device 024f
Flags: bus master, fast devsel, latency 0, IRQ 31
Memory at f6c00000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at ef98 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)
Subsystem: Dell Device 024f
Flags: bus master, fast devsel, latency 0
Memory at f6b00000 (64-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
X.Org X Server 1.7.5.902 (1.7.6 RC 2)
Release Date: 2010-03-12
X Protocol Version 11, Revision 0
(--) PCI:*(0:0:2:0) 8086:2a42:1028:024f Intel Corporation Mobile 4
Series Chipset Integrated Graphics Controller rev 7, Mem @
0xf6c00000/4194304, 0xe0000000/268435456, I/O @ 0x0000ef98/8, BIOS @
0x????????/131072
(--) PCI: (0:0:2:1) 8086:2a43:1028:024f Intel Corporation Mobile 4
Series Chipset Integrated Graphics Controller rev 7, Mem @
0xf6b00000/1048576, BIOS @ 0x????????/65536
(II) LoadModule: "intel"
(II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so
(II) Module intel: vendor="X.Org Foundation"
compiled for 1.7.0, module version = 2.9.1
Module class: X.Org Video Driver
ABI class: X.Org Video Driver, version 6.0
(II) intel: Driver for Intel Integrated Graphics Chipsets: i810,
i810-dc100, i810e, i815, i830M, 845G, 852GM/855GM, 865G, 915G,
E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G,
965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45,
4 Series, G45/G43, Q45/Q43, G41, B43, Clarkdale, Arrandale
(II) Primary Device is: PCI 00@00:02:0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 9, (OK)
drmOpenByBusid: Searching for BusID pci:0000:00:02.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 9, (OK)
drmOpenByBusid: drmOpenMinor returns 9
drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0
(**) intel(0): Depth 24, (--) framebuffer bpp 32
(==) intel(0): RGB weight 888
(==) intel(0): Default visual is TrueColor
(II) intel(0): Integrated Graphics Chipset: Intel(R) GM45
(--) intel(0): Chipset: "GM45"
(II) intel(0): Output LVDS1 has no monitor section
(II) intel(0): found backlight control interface
/sys/class/backlight/acpi_video0
(II) intel(0): Output VGA1 has no monitor section
(II) intel(0): Output HDMI1 has no monitor section
(II) intel(0): Output DP1 has no monitor section
(II) intel(0): Output HDMI2 has no monitor section
(II) intel(0): Output DP2 has no monitor section
(II) intel(0): Output DP3 has no monitor section
(II) intel(0): Output TV1 has no monitor section
(II) intel(0): EDID for output LVDS1
(II) intel(0): Manufacturer: SEC Model: 5443 Serial#: 0
(II) intel(0): Year: 2008 Week: 0
(II) intel(0): EDID Version: 1.3
(II) intel(0): Digital Display Input
(II) intel(0): Max Image Size [cm]: horiz.: 33 vert.: 21
(II) intel(0): Gamma: 2.20
(II) intel(0): No DPMS capabilities specified
(II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
(II) intel(0): First detailed timing is preferred mode
(II) intel(0): redX: 0.580 redY: 0.340 greenX: 0.310 greenY: 0.550
(II) intel(0): blueX: 0.155 blueY: 0.155 whiteX: 0.313 whiteY: 0.329
(II) intel(0): Manufacturer's mask: 0
(II) intel(0): Supported detailed timing:
(II) intel(0): clock: 164.2 MHz Image Size: 331 x 207 mm
(II) intel(0): h_active: 1920 h_sync: 2020 h_sync_end 2052 h_blank_end
2216 h_border: 0
(II) intel(0): v_active: 1200 v_sync: 1202 v_sync_end 1208 v_blanking:
1235 v_border: 0
(II) intel(0): Supported detailed timing:
(II) intel(0): clock: 109.5 MHz Image Size: 331 x 207 mm
(II) intel(0): h_active: 1920 h_sync: 2020 h_sync_end 2052 h_blank_end
2216 h_border: 0
(II) intel(0): v_active: 1200 v_sync: 1202 v_sync_end 1208 v_blanking:
1235 v_border: 0
(II) intel(0): RX392<80>154CT
(II) intel(0):
--
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