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2 instances of omxplayer using mpeg2 causes gpu lockup #386

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jmeiners opened this issue Oct 29, 2015 · 21 comments
Closed

2 instances of omxplayer using mpeg2 causes gpu lockup #386

jmeiners opened this issue Oct 29, 2015 · 21 comments

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@jmeiners
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If you play 2 instances of omxplayer (windowed display) and both are using mpeg2 sources the gpu both videos will freeze and the gpu will stop responding to any vc commands till rebooted. (mpeg2 is licensed)

Is there a hardware/software limitation to only a single mpeg2 stream?
@VittGam
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VittGam commented Oct 29, 2015

Have you tried increasing the RAM allocated to the GPU to more than 128 MB? You can do it with gpu_mem in /boot/config.txt, or via raspi-config.

@jmeiners
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Yes, using 196M gpu on a pi2.
It can run 6+ instances if it is h.264, but only 1 if mpeg2

@carlonluca
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Probably not the same issue, but it seems similar to raspberrypi/firmware#449. Although the problem is related also to h264 there.

@jmeiners
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Not really. This lockup happens immediately every time.

@carlonluca
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If you read all the messages you'll see that I can reproduce the same (or very similar) freeze in a few seconds when I run multiple players concurrently. The backtrace in every case is very similar (you'll have to read the messages after the first report).

@carlonluca
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Also maybe related to #379?

@jmeiners
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I think I have also seen the lockup you are referring to. Very rare but can happen.

This issue is I can run lots of h.264 instances but only 1 mpeg2.

@carlonluca
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If I run multiple players I get a complete lock of the GPU in a few seconds. If I run a single player I have a very rare lock, maybe related to frequent seek or however not sure. But I typically see both on h264. If you can run on gdb your omxplayer you may compare your backtraces with the ones I reported.

@gkreidl
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gkreidl commented Nov 1, 2015

I suppose it's a firmware issue. I could play up to four SD MPEG TS channels a short while ago (before upgrading to Jessie) with the same omxplayer version, Now it doesn't work any more.

@jmeiners
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jmeiners commented Nov 1, 2015

Do you recall what firmware version you were running (that worked)?

@popcornmix
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Try with --nodeinterlace - I suspect that will work.

It's the change to the QPU deinterlacer which causes this. It grabs a lock on the QPUs which prevents a second stream from also using QPU deinterlace.
I'll see if we can either fall back to VPU deinterlace if QPU is not available, or whether we can share for SD resolutions.
1080i deinterlace is never going to support multiple streams (it's very expensive for GPU).

@gkreidl
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gkreidl commented Nov 2, 2015

it does work and now I know why it always worked for me until a short while ago: for some reason I had --deinterlace in my live-tv options (a special settings field in omxplayerGUI).

@jmeiners
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jmeiners commented Nov 2, 2015

You, my friend, are a genius :)
Is that locking done in the open source interface lib or the gpu?

@popcornmix
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It's in the firmware. I'm looking into it.

@popcornmix
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Can you test: https://dl.dropboxusercontent.com/u/3669512/temp/firmware_multideint.zip

@jmeiners
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jmeiners commented Nov 4, 2015

That firmware actually crashes my pi2. I am running a custom kernel though, so probably not the best test subject. Maybe someone of a recent kernel can try it?

@popcornmix
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How does it crash? Do you get rainbow splash screen? Do you get any kernel console log? Can you log in?

@jmeiners
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jmeiners commented Nov 4, 2015

Very strange. The device will lock up (custom screen saver freezes, ssh freezes, etc). Sometimes it will recover for awhile and then lock up again. This is just after boot, not running omxplayer. Seems unlikely to have anything to do with your specific change.
My systems are firmware/kernel locked down so I can't actually use a firmware update anyway. I'm perfectly happy with using --nodeinterlace for the windowed display case (thanks again). The quality difference isn't a big deal in the smaller window.

@popcornmix
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@gkreidl are you able to test the dropbox firmware?

@gkreidl
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gkreidl commented Nov 4, 2015

Sorry, not at the moment.

Am 04.11.2015, 17:48 Uhr, schrieb popcornmix [email protected]:

@gkreidl are you able to test the dropbox firmware?

Reply to this email directly or view it on GitHub:
#386 (comment)

popcornmix added a commit to raspberrypi/firmware that referenced this issue Nov 6, 2015
@popcornmix
firmware: di_adv: Move to new scheme where qpu code handles top/botto…
591b25a 
…m edges

See: #463

firmware: di_adv: Add config setting to add nop delays to shader
See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2150605#pid2150605

firmware: vcilcs: Avoid a potential deadlock when very threaded
See: #449

firmware: vrf: Add spinlock around vrf acquire/release calls to avoid restoring an invalid p10 from ISR context

firmware: rpi_display: only ratelimit if the backlight is actually changed
See: raspberrypi/linux#1179

firmware: di_adv: Support multiple instances of qpu deinterlace at SD resolution
See: popcornmix/omxplayer#386

linux: rpi-ft5406: Use interruptible sleep to avoid high load reported
See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=125034

linux: dts: Added overlay for Adafruit PiTFT 2.8 capacitive touch screen
See: raspberrypi/linux#1192

linux: config: Add MCP320X
See: raspberrypi/linux#1189

linux: Build i2c_gpio module and add a device tree overlay to configure it
See: raspberrypi/linux#1183
popcornmix added a commit to Hexxeh/rpi-firmware that referenced this issue Nov 6, 2015
@popcornmix
firmware: di_adv: Move to new scheme where qpu code handles top/botto…
2b42a48 
…m edges

See: raspberrypi/firmware#463

firmware: di_adv: Add config setting to add nop delays to shader
See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2150605#pid2150605

firmware: vcilcs: Avoid a potential deadlock when very threaded
See: raspberrypi/firmware#449

firmware: vrf: Add spinlock around vrf acquire/release calls to avoid restoring an invalid p10 from ISR context

firmware: rpi_display: only ratelimit if the backlight is actually changed
See: raspberrypi/linux#1179

firmware: di_adv: Support multiple instances of qpu deinterlace at SD resolution
See: popcornmix/omxplayer#386

linux: rpi-ft5406: Use interruptible sleep to avoid high load reported
See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=125034

linux: dts: Added overlay for Adafruit PiTFT 2.8 capacitive touch screen
See: raspberrypi/linux#1192

linux: config: Add MCP320X
See: raspberrypi/linux#1189

linux: Build i2c_gpio module and add a device tree overlay to configure it
See: raspberrypi/linux#1183
@popcornmix
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The fix is in latest rpi-update firmware. I can now play 4 SD videos with deinterlace.

@popcornmix popcornmix mentioned this issue Nov 15, 2016
Closed
neuschaefer pushed a commit to neuschaefer/raspi-binary-firmware that referenced this issue Feb 27, 2017
@popcornmix
firmware: di_adv: Move to new scheme where qpu code handles top/botto…
0a6c54c 
…m edges

See: raspberrypi#463

firmware: di_adv: Add config setting to add nop delays to shader
See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2150605#pid2150605

firmware: vcilcs: Avoid a potential deadlock when very threaded
See: raspberrypi#449

firmware: vrf: Add spinlock around vrf acquire/release calls to avoid restoring an invalid p10 from ISR context

firmware: rpi_display: only ratelimit if the backlight is actually changed
See: raspberrypi/linux#1179

firmware: di_adv: Support multiple instances of qpu deinterlace at SD resolution
See: popcornmix/omxplayer#386

linux: rpi-ft5406: Use interruptible sleep to avoid high load reported
See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=125034

linux: dts: Added overlay for Adafruit PiTFT 2.8 capacitive touch screen
See: raspberrypi/linux#1192

linux: config: Add MCP320X
See: raspberrypi/linux#1189

linux: Build i2c_gpio module and add a device tree overlay to configure it
See: raspberrypi/linux#1183
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5 participants
@VittGam @popcornmix @carlonluca @gkreidl @jmeiners