[Intel-gfx] What's using all my DRI memory?

[Adam Nielsen]

Hi all,

Any suggestions with this?  My system just crashed again because the
Intel driver used up all 16GB of my system memory.

Thanks,
Adam.

On Mon, 9 May 2016 22:06:49 +1000
Adam Nielsen <a.nielsen at shikadi.net> wrote:

> Hi all,
> 
> I'm trying to track down an annoying bug which is making my system
> crash every two weeks, and in between those two weeks I get various
> programs, typically Firefox, killed every day or two due to out of
> memory errors.
> 
> Apparently all this memory is used by the Intel video driver, which
> doesn't leave enough memory on my 16GB system for applications to run.
> I'm not sure how to work out why this is the case.  Is it a bug in the
> Intel driver, not releasing the memory?  Is it a buggy program
> allocating too much display memory?  How can I figure out what's using
> up all the memory?
> 
> According to this, it looks like 8GB of memory is in use:
> 
> =====
> $ cat /sys/kernel/debug/dri/0/i915_gem_objects 
> 854 objects, 8128716800 bytes
> 446 [17] objects, 657387520 [105037824] bytes in gtt
>   11 [1] active objects, 1662976 [1048576] bytes
>   435 [16] inactive objects, 655724544 [103989248] bytes
> 0 unbound objects, 0 bytes
> 28 purgeable objects, 23433216 bytes
> 5 pinned mappable objects, 103358464 bytes
> 4 fault mappable objects, 55271424 bytes
> 2147483648 [268435456] gtt total
> 
> systemd-logind: 801 objects, 7467040768 bytes (1593344 active, 599011328 inactive, 600604672 global, 6698557440 shared, 6850830336 unbound)
> systemd-logind: 40 objects, 693960704 bytes (0 active, 89206784 inactive, 89206784 global, 520888320 shared, 599760896 unbound)
> =====
> 
> This seems excessively high, so is there any way to figure out what
> it's being used for?
> 
> There must be a leak somewhere, because the system will run fine for a
> week, then programs start getting killed by the kernel OOM handler more
> and more frequently until I can't load any programs any more (they get
> killed during launch) and have to reboot the machine.
> 
> Many thanks,
> Adam.
> 
> 
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