On 13-03-09 5:32 AM, Insop Song wrote:
On Fri, Mar 8, 2013 at 3:35 PM, Bruce Ashfield
<bruce.ashfi...@windriver.com> wrote:
On 13-03-08 12:01 PM, Darren Hart wrote:
On 03/04/2013 08:04 PM, Insop Song wrote:
Hi,
I am preparing a new meta layer for testing and promoting a
sched_deadline scheduler, called "meta-dl". I am planning to add
scheduler testing tools and different kernel versions as well.
- http://insop.github.com/meta-dl/
Note that qemux86 doesn't support the EMGD graphics driver. You mention
this and its license in the README, but it isn't necessary. If you are
pulling that in, there is a problem with your recipes.
wow. mailing list delays are making this conversation *extremely*
painful and disjointed.
Darren,
Those that you've mentioned were from yocto kernel lab examples.
I went over and cleaned them up. https://github.com/insop/meta-dl
However, at this point, I am more looking at meta-realtime that uses
yocto-linux-3.8 instead as Bruce's suggestion.
https://github.com/insop/meta-realtime
Expect that the yocto project hosted meta-realtime will appear in a
week or so. I'm doing the legwork at the moment, but with some travel
in the upcoming week, the initial push will be delayed by a few days.
Cheers,
Bruce
So you are using the sched_deadline patches, but not PREEMPT_RT, is that
right? I had always assumed sched_deadline ran on top of PREEMPT_RT (but
I haven't every tried building it myself).
sched_deadline applies to mainline, right on top of CFS as a scheduler
class. So in fact, I wouldn't suggest it with preempt-rt at all at the
moment.
Right, previously, Juri maintained sched_deadline on top of
preempt-rt, but not any more.
What you have here is a good experimental layer. Looking forward, please
consider:
o Incorporating sched_deadline as a kernel feature into the
linux-yocto_3.8 kernel. We can easily add recipes to build a
linux-yocto-deadline kernel and you will get all the benefits of the
yocto tooling, testing, bugfixing, and free forward porting.
Already done. I've had it in linux-yocto-3.8 since I first introduced
it. We just need the supporting userspace to easily change the
scheduler class for a process.
Yup, two apps that can test sched_deadline is at meta-realtime now.
I will prepare some script to make it easier as well.
o Incorporating your tests into (poky|oe-core)/meta/recipes-rt
Or if they aren't fully 'core', our new meta-realtime that I'd like
to have created shortly.
I will be playing with meta-realtime at github until you create one.
Please let me know if you have any other requested program on this layer.
Regards,
Insop
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