Hi,

On 03/07/2013 01:43 PM, Insop Song wrote:
Hi Bruce,


What do you have in your "defconfig" ? I'm about to push patches that
will make enabling sched_dealine a KERNEL_FEATURE option, which makes
it even easier to use.


Here is my defconfg
https://github.com/insop/meta-dl/blob/sched-dl-V7/recipes-kernel/linux/linux/defconfig

I've asked this to Juri, too. So this is for the config for sched_deadline
"Every defconfig kernel should compile and work
fine (given HZ=1000, NO_HZ not set and HRTIMERS=y)"

And here are the CONFIG that should set  (Juri, please let us know if
I miss anything)
------
CONFIG_EXPERIMENTAL = y
CONFIG_CGROUPS = y
CONFIG_CGROUP_SCHED = n
CONFIG_HIGH_RES_TIMERS = y
CONFIG_PREEMPT = y
CONFIG_PREEMPT_RT = y
CONFIG_HZ_1000 = y

# CONFIG_NO_HZ is not set


I actually have:

CONFIG_HIGH_RES_TIMERS = y
CONFIG_PREEMPT = y
CONFIG_HZ_1000 = y
# CONFIG_NO_HZ is not set

all the other options are not required (anymore, as the PREEMPT_RT,
since SCHED_DEADLINE is currently based on 3.8-rc7).

Thanks,

- Juri

------

But in the meantime, if you want to enable the support on a yocto BSP,
you can change your "defconfig" to be "sched-deadline.cfg" and only
put the kernel options required to enable the feature.

I will pick up yocto-3.8 bb file from "master" branch and will try
this way shortly.

Regards,

Insop


Cheers,

Bruce



   PV = "3.8"
-PR = "dl7"
+PR = "dl"

   KSRC ?= ""
   S = '${@base_conditional("KSRC", "", "${WORKDIR}/git", "${KSRC}", d)}'

Thank you.

Insop

On Wed, Mar 6, 2013 at 8:00 PM, Bruce Ashfield
<bruce.ashfi...@windriver.com> wrote:

On 13-03-05 1:54 AM, 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/



FYI: I've already merged and staged sched_dl in linux-yocto_3.8:


http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-3.8/log/?h=standard/edf

I'll be supporting it there as well, so it makes sense to coordinate
our efforts around kernels, configurations and benchmarks.

Juri and I talked about this @ ELC a few weeks ago (I've added
him to the cc as well), and rather than hiding sched_deadline
kernel support in a custom kernel layer, I'd like to try and get
more eyes on it via linux-yocto .. so if we can all coordinate our
efforts here, that would be much better.

Cheers,

Bruce


With the help of hands-on kernel lab (thank you Tom and Darren), I am
able to make kernel with sched_deadline enabled.


Now, I am having some trouble of adding testing tools to this meta-dl,
and hope I can get some help from you.

- problem: adding a new software into my meta-dl layer

- symtom and questions?
1. bitbake core-image-minimal (normal image build) won't include the
additional program that I listed in .bb file below
2. If I do "bitbake schedtool-dl -c install" it builds and install,
but at "i586" location instead of my machine staging rootfs
(dl-qemux86)



- Here is my .bb file that pulls an additional program.


https://github.com/insop/meta-dl/blob/sched-dl-V7/recipes-tools/schedtool-dl/schedtool-dl.bb
===
DESCRIPTION = "schedtool-dl (scheduler test tool) for deadline
scheduler"
HOMEPAGE = "https://github.com/insop/schedtool-dl";
SECTION = "base"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM =
"file://Makefile;endline=55;md5=e4b4e8ed9c2132e1d727a1bb5e3bd984"
PR = "r1"

SRC_URI = "git://github.com/insop/schedtool-dl.git;protocol=git"
SRCREV = "${AUTOREV}"

S = "${WORKDIR}/git"

do_compile() {
           oe_runmake
}

do_install() {
           oe_runmake install DESTDIR=${D}
}

PARALLEL_MAKE = ""

BBCLASSEXTEND = "native"

COMPATIBLE_MACHINE_dl-qemux86 = "dl-qemux86"
====


- I've updated my conf/layer.conf file to include above file
https://github.com/insop/meta-dl/blob/sched-dl-V7/conf/layer.conf
====
# We have a conf and classes directory, add to BBPATH
BBPATH := "${BBPATH}:${LAYERDIR}"

# We have a recipes directory, add to BBFILES
BBFILES := "${BBFILES} ${LAYERDIR}/recipes-*/*/*.bb \
           ${LAYERDIR}/recipes-*/*/*.bbappend"

BBFILE_COLLECTIONS += "dl-qemux86"
BBFILE_PATTERN_dl-qemux86 := "^${LAYERDIR}/"
BBFILE_PRIORITY_dl-qemux86 = "6"
=====



Thank you.

Regards,

Insop


- ref:
1. sched_deadline:
https://events.linuxfoundation.org/events/linuxcon-europe/song
2. sched_deadline:


http://events.linuxfoundation.org/images/stories/slides/elc2013_kobayashi.pdf?a
_______________________________________________
yocto mailing list
yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/yocto



_______________________________________________
yocto mailing list
yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/yocto


_______________________________________________
yocto mailing list
yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/yocto

Reply via email to