[yocto] [meta-intel] "Crazy" Xorg memory usage after upgrading from Daisy to Fido

[Chang, Rebecca Swee Fun]

Hi Vincent,

Can you help to comment on this issue mentioned by Chris?
Thanks.

Regards,
Rebecca

> -----Original Message-----
> From: Paul Eggleton [mailto:paul.eggleton at linux.intel.com]
> Sent: 09 June, 2015 12:15 AM
> To: Chang, Rebecca Swee Fun
> Cc: meta-intel at yoctoproject.org; Chris Tapp; Yocto Project; Wold, Saul
> Subject: Re: [meta-intel] "Crazy" Xorg memory usage after upgrading from
> Daisy to Fido
> 
> Rebecca, is this something you or one of your colleagues would be able to
> help with?
> 
> Thanks,
> Paul
> 
> On Friday 05 June 2015 08:29:00 Chris Tapp wrote:
> > I’ve got an application that I’ve had running nicely under Daisy for
> > some time. As Daisy is now a bit old, I decided to move the application to
> Fido.
> > I’m using the meta-intel/isg/valleyisland BSP and also switched to
> > using its Fido branch.
> >
> > The move only required a few minor changes and allowed me to drop a
> > Daisy “updates” layer that I had been using for things like gstreamer-1.0.
> >
> > However, there is one behaviour which is killing me - I keep getting
> > oom-killer events!
> >
> > The application is basically an OpenGL-ES 2.0 application that renders
> > various bits of text, images and streams captured from a gstreamer
> > pipeline at 60 Hz to a 1080 screen.
> >
> > Under Daisy this generally took just under 50% CPU and used a modest
> > percentage of the 4 GB system memory - i.e. no where near running out
> > and usage was just about static.
> >
> > Under Fido the CPU usage is about the same and the memory used by the
> > application itself looks reasonable when compared to Daisy (and usage
> > is static). However, the memory used by XOrg is far from constant or
> > stable - it basically has a VSZ value cycling from about 630m to 2989m
> > with the cycle period being in the order of 5 to 10 seconds. Peaks in
> > XOrg memory usage coincide with stutters in video playback within my
> > app (audio is unaffected).
> >
> > Monitoring /proc/meminfo when this is going on shows that “Shmem”
> > usage is following the same pattern as the memory used by XOrg (i.e.
> > Shmem usage is high at the same time). If the values are plotted on a
> > graph they appear to show that Shmem usage grows linearly and then
> > falls rapidly when nearly all the free memory has been exhausted,
> > perhaps in response to a delayed garbage collection run.
> >
> > Does anyone have any ideas as to what I should be looking at to work
> > out what’s going on?
> >
> > Are there any significant changes between XOrg under Daisy and Fido
> > that could be causing this?
> >
> > Could this be related to the meta-intel video drivers?
> >
> > Any feedback / comments would be really appreciated.
> >
> > Thanks :-)
> >
> > --
> >
> > Chris Tapp
> > opensource at keylevel.com
> > www.keylevel.com
> >
> > ----
> > You can tell you're getting older when your car insurance gets real cheap!
> 
> --
> 
> Paul Eggleton
> Intel Open Source Technology Centre