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Date: Mon, 9 Feb 2009 19:30:56 +0000
Message-ID: <b6a2d2e20902091130ha452a97rcfaa2972bfdbe710@mail.gmail.com>
Subject: cgroup, RT reservation per core(s)?
From: Rolando Martins <rolando.martins@gmail.com>
To: linux-kernel@vger.kernel.org
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Hi,
I would like to have in a quad-core, 2 cores totally (100%) dedicated
to RT tasks (SCHED_RR and SCHED_FIFO) and the other 2 cores with
normal behavior, better said,  allowing SCHED_OTHER & SCHED_FIFO &
SCHED_RR tasks but still with a RT reservation. Follows an example:


# Setup first domain (cpu 0,1)
echo 0-1 > /dev/cgroup/0/cpuset.cpus
echo 0 > /dev/cgroup/0/cpuset.mems

# Setup RT bandwidth for firstdomain (80% for RT, 20% others)
echo 1000000 > /dev/cgroup/0/cpu.rt_period_us
echo 800000 > /dev/cgroup/0/cpu.rt_runtime_us


# Setup second domain (cpu 2,3)
mkdir /dev/cgroup/1
echo 2-3 > /dev/cgroup/1/cpuset.cpus
echo 0 > /dev/cgroup/1/cpuset.mems

# Setup RT bandwidth for second domain (100% for RT)
echo 1000000 > /dev/cgroup/1/cpu.rt_period_us
echo 1000000 > /dev/cgroup/1/cpu.rt_runtime_us

Is there anyway for doing this?

Thanks,
Rol