Building an RT kernel is not terribly different from building a vanilla kernel:http://verahill.blogspot.com.au/2012/03/debian-testing-kernel-329.html
The main differences are:
1. the application of the relevant RT kernel patch
2. the configuration of RT specific kernel options
The latter step requires reading up on what an RT kernel does differently from a vanilla kernel, and the configuration will depend on your application.
The value of this guide is fairly small, since you wouldn't typically use an RT kernel on a desktop, but on a dedicate server or embedded system. I'm still working on a cross-compiling guide for non-x86 architectures.
In addition, having an RT kernel is only the first step -- it needs to be used in the correct way to allow for prioritising processes/pre-emptive execution in an efficient way. An overview for a particular application is given here: http://wiki.linuxmusicians.com/doku.php?id=system_configuration
Briefly,
sudo apt-get install kernel-package fakeroot
wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.2.9.tar.bz2
wget http://kernel.org/pub/linux/kernel/projects/rt/3.2/patches-3.2.9-rt17.tar.bz2
tar -xvf linux-3.2.9.tar.bz2
cd linux-3.2.9/
bzcat ../patches-3.2.9-rt17.tar.bz2 |patch -p1
cat /boot/config-`uname -r` .config
make oldconfig
You get to answer a number of questions relating to real-time OS execution
Launch the build process
fakeroot make-kpkg -j7 --initrd --revision=3.2.9 --append-to-version=rt kernel_image kernel_headers
where 7 is the number of cpu cores+1.
The deb-packages will be found in the folder above linux-3.2.9/ and can be installed using sudo pkg -i
.
The main differences are:
1. the application of the relevant RT kernel patch
2. the configuration of RT specific kernel options
The latter step requires reading up on what an RT kernel does differently from a vanilla kernel, and the configuration will depend on your application.
The value of this guide is fairly small, since you wouldn't typically use an RT kernel on a desktop, but on a dedicate server or embedded system. I'm still working on a cross-compiling guide for non-x86 architectures.
In addition, having an RT kernel is only the first step -- it needs to be used in the correct way to allow for prioritising processes/pre-emptive execution in an efficient way. An overview for a particular application is given here: http://wiki.linuxmusicians.com/doku.php?id=system_configuration
Briefly,
sudo apt-get install kernel-package fakeroot
wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.2.9.tar.bz2
wget http://kernel.org/pub/linux/kernel/projects/rt/3.2/patches-3.2.9-rt17.tar.bz2
tar -xvf linux-3.2.9.tar.bz2
cd linux-3.2.9/
bzcat ../patches-3.2.9-rt17.tar.bz2 |patch -p1
cat /boot/config-`uname -r` .config
make oldconfig
You get to answer a number of questions relating to real-time OS execution
1. No Forced Preemption (Server) (PREEMPT_NONE)
> 2. Voluntary Kernel Preemption (Desktop) (PREEMPT_VOLUNTARY)
3. Preemptible Kernel (Low-Latency Desktop) (PREEMPT__LL) (NEW)
4. Preemptible Kernel (Basic RT) (PREEMPT_RTB) (NEW)
5. Fully Preemptible Kernel (RT) (PREEMPT_RT_FULL) (NEW)
choice[1-5]: 4
[..]
Testing module to detect hardware-induced latencies (HWLAT_DETECTOR) [M/n/y/?] (NEW)
[..]
Launch the build process
fakeroot make-kpkg -j7 --initrd --revision=3.2.9 --append-to-version=rt kernel_image kernel_headers
where 7 is the number of cpu cores+1.
The deb-packages will be found in the folder above linux-3.2.9/ and can be installed using sudo pkg -i
.
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.
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