Crash gst-launch-1.0

[jordan38]

Hi community,

I have got some difficulty with gst-launch .

The setup is the following:

rootfs built with yocto daisy, and MACHINE is imx6dlsabresd.conf, linux kernel is 3.10.53

After many start and stop,  gst-launch does'nt work anymore and i get in dmesg:

[...]
[  191.340414] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  191.346677] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  201.211647] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  201.217550] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  212.483180] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  212.490908] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  221.341983] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  221.347346] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  232.597694] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  232.603687] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  236.390187] mxc_vpu 2040000.vpu: VPU interrupt received.
[  241.809888] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  241.815083] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  246.435875] mxc_vpu 2040000.vpu: VPU interrupt received.
[  248.907565] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.915269] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.923872] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.930698] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.939676] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.946422] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.955335] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.961802] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.969914] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.976385] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.984681] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  248.992071] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  251.858518] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  251.863664] mxc_v4l2_output v4l2_out.24: Bypass IC.
[  256.487135] mxc_vpu 2040000.vpu: VPU interrupt received.
[  259.270171] mxc_v4l2_output v4l2_out.24: memory alloc size 3133440 failed
[  259.278440] mxc_v4l2_output v4l2_out.24: offset invalid [offset=0x1de2000]
[  259.287138] mxc_v4l2_output v4l2_out.24: memory alloc size 3133440 failed
[  259.296839] mxc_v4l2_output v4l2_out.24: offset invalid [offset=0x20df000]
[  259.305832] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  259.314927] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  259.324770] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  259.332113] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  259.340828] mxc_vpu 2040000.vpu: Physical memory allocation error!
[  259.347959] mxc_vpu 2040000.vpu: Physical memory allocation error!

To remake the  crash , we use a .sh:

while [ 1 ]; do

gst-launch-1.0 udpsrc uri=udp://@239.1.1.2:1235 ! video/mpegts, systemstream=\(boolean\)true, packetsize=\(int\)188 ! aiurdemux streaming-latency=2000 name=mydemux mydemux. ! queue2 max-size-time=0 ! vpudec ! imxv4l2sink name=myvideosink force-aspect-ratio=false overlay-width=1010 overlay-height=568 overlay-top=299 overlay-left=19 mydemux. ! queue2 max-size-time=0 ! beepdec ! playsink audio-sink="volume name=myvolume volume=0.630957 mute=false ! alsasink name=myaudiosink device=dsp0" &

sleep 10;

killall -9 gst-launch-1.0

done

Do you have solution?

Best Regads,

Jordan

[Yuri]

Hello,

I remember the following limitation :

   When playing the video for a long time, allocation of contiguous memory may fail

(memory fragmentation).

   To play video when the system memory is low, run the command:

$ echo 1 >/proc/sys/vm/lowmem_reserve_ratio

   It protects the DMA zone and avoids memory allocation errors.

Also, from the next thread :

"[i.MX6]memory leak of Gstreamer"

https://community.freescale.com/thread/333860

"... we try to perform

$ echo 1 >/proc/sys/vm/drop_caches

by the script of while [1] in playing video. The memory will not rise continuously

and can play video normally."

Have a great day,
Yuri

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[jordan38]

Thank you for your reply.

But colleague have try you solution and it' doesn't solve the problem.

[Yuri]

Hello,

1.

There are tools for avoiding file caching of a specific application like the pagecache-management

(https://code.google.com/p/pagecache-mangagement/)

This is an open source project NOT maintained and NOT supported by NXP, which could anyway help.

2.

You may try to add "cma=384M" in kernel command line.

3.

Also, please use the recent Linux BSP :

i.MX 6 Series Software and Development Tool|NXP

Regards,

Yuri.