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| {{{#!wiki caution This information is outdated. Please refer to the [[http://www.litmus-rt.org/install.html|instructions on the project homepage]]. }}} |
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| The extension to the Linux kernel is released as a patch against the Linux kernel. To install the LITMUS^RT^ kernel, first [[http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.bz2|download the Linux kernel 3.0]] and untar it in a directory of your choice (hereafter referred to as `$DIR`). Second, apply the LITMUS^RT^ patch (download the [[CurrentRelease|current version]]) and configure, compile, and install the kernel as usual. The patch is `-p1` applicable. | The extension to the Linux kernel is released as a patch against the Linux kernel. To install the LITMUS^RT^ kernel, first [[https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.3.tar.gz|download the Linux kernel 4.1.3]] and untar it in a directory of your choice (hereafter referred to as `$DIR`). Second, apply the LITMUS^RT^ patch (download the [[Releases|current version]]) and configure, compile, and install the kernel as usual. The patch is `-p1` applicable. |
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| # get Linux 3.0 wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.bz2 tar xjf linux-3.0.tar.bz2 wget http://www.litmus-rt.org/releases/2012.3/litmus-rt-2012.3.patch mv linux-3.0 litmus-rt |
# get Linux 4.1.3 wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.3.tar.gz tar xzf linux-4.1.3.tar.gz wget http://www.litmus-rt.org/releases/2016.1/litmus-rt-2016.1.patch mv linux-4.1.3 litmus-rt |
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| patch -p1 < ../litmus-rt-2012.3.patch | patch -p1 < ../litmus-rt-2016.1.patch |
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| # - select HZ=1000 | |
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| # - disable NO_HZ | |
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| make modules | make modules # unless you are building static kernel (e.g., for QEMU) |
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| When configuring the kernel, note that there is a menu (at the very end of the list) with LITMUS^RT^-specific configuration options. For reference, we provide a [[http://www.litmus-rt.org/releases/2012.3/x86_64-config|sample 64-bit configuration]] that is known to work under KVM. | When configuring the kernel, note that there is a menu (at the very end of the list) with LITMUS^RT^-specific configuration options. For reference, we provide a [[http://www.litmus-rt.org/releases/2016.1/x86_64-config|sample 64-bit configuration]] that is known to work under KVM. |
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| The user-space library for real-time tasks, `liblitmus`, depends on the LITMUS^RT^ kernel kernel and provides its own build system. Run make help for instructions. Note that you will have to create a `.config` file in the library directory to point the build system to the kernel sources. For reference, we provide a sample [[http://www.litmus-rt.org/releases/2012.3/liblitmus-config|liblitmus configuration file]]. | The user-space library for real-time tasks, `liblitmus`, depends on the LITMUS^RT^ kernel kernel and provides its own build system. Run make help for instructions. Note that you will have to create a `.config` file in the library directory to point the build system to the kernel sources. For reference, we provide a sample [[http://www.litmus-rt.org/releases/2016.1/liblitmus-config|liblitmus configuration file]]. |
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| wget http://www.litmus-rt.org/releases/2012.3/liblitmus-2012.3.tgz tar xzf liblitmus-2012.3.tgz |
wget http://www.litmus-rt.org/releases/2016.1/liblitmus-2016.1.tgz tar xzf liblitmus-2016.1.tgz |
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| wget http://www.litmus-rt.org/releases/2012.3/liblitmus-config | wget http://www.litmus-rt.org/releases/2016.1/liblitmus-config |
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| The Feather-Trace tools (also known as `ft_tools`) depend on the `liblitmus` build system. Before the Feather-Trace toolscan be built, you must have successfully compiled `liblitmus` first. For reference, we provide [[http://www.litmus-rt.org/releases/2012.3/ft_tools-config|a sample ft_tools configuration file]]. | The Feather-Trace tools (also known as `ft_tools`) depend on the `liblitmus` build system. Before the Feather-Trace tools can be built, you must have successfully compiled `liblitmus` first. For reference, we provide [[http://www.litmus-rt.org/releases/2016.1/ft_tools-config|a sample ft_tools configuration file]]. |
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| wget http://www.litmus-rt.org/releases/2012.3/ft_tools-2012.3.tgz tar xzf ft_tools-2012.3.tgz |
wget http://www.litmus-rt.org/releases/2016.1/ft_tools-2016.1.tgz tar xzf ft_tools-2016.1.tgz |
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| wget http://www.litmus-rt.org/releases/2012.3/ft_tools-config | wget http://www.litmus-rt.org/releases/2016.1/ft_tools-config |
This information is outdated. Please refer to the instructions on the project homepage.
Installation Instructions
The following instructions describe how to download and build the latest released version of LITMUSRT. If you intend to use LITMUSRT for development, you should use our source code repositories instead.
The Kernel
The extension to the Linux kernel is released as a patch against the Linux kernel. To install the LITMUSRT kernel, first download the Linux kernel 4.1.3 and untar it in a directory of your choice (hereafter referred to as $DIR). Second, apply the LITMUSRT patch (download the current version) and configure, compile, and install the kernel as usual. The patch is -p1 applicable.
To summarize, the LITMUSRT kernel can be obtained, patched, and compiled with the following commands:
cd $DIR
# get Linux 4.1.3
wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.3.tar.gz
tar xzf linux-4.1.3.tar.gz
wget http://www.litmus-rt.org/releases/2016.1/litmus-rt-2016.1.patch
mv linux-4.1.3 litmus-rt
# apply the LITMUS RT patch
cd litmus-rt
patch -p1 < ../litmus-rt-2016.1.patch
# create a working kernel configuration
# - enable in-kernel preemptions
# - don't use power management options like frequency scaling
# - disable support for group scheduling
# - disable "Write protect kernel read-only data structures" (in kernel debug)
make menuconfig
# compile the kernel
make bzImage
make modules # unless you are building static kernel (e.g., for QEMU)
# proceed to install kernel, build initrd, etc.
...
When configuring the kernel, note that there is a menu (at the very end of the list) with LITMUSRT-specific configuration options. For reference, we provide a sample 64-bit configuration that is known to work under KVM.
The Userspace Library
The user-space library for real-time tasks, liblitmus, depends on the LITMUSRT kernel kernel and provides its own build system. Run make help for instructions. Note that you will have to create a .config file in the library directory to point the build system to the kernel sources. For reference, we provide a sample liblitmus configuration file.
To summarize, the liblitmus can be obtained and compiled with the following commands:
cd $DIR
wget http://www.litmus-rt.org/releases/2016.1/liblitmus-2016.1.tgz
tar xzf liblitmus-2016.1.tgz
cd liblitmus
wget http://www.litmus-rt.org/releases/2016.1/liblitmus-config
mv liblitmus-config .config
make
Feather-Trace Tools
The Feather-Trace tools (also known as ft_tools) depend on the liblitmus build system. Before the Feather-Trace tools can be built, you must have successfully compiled liblitmus first. For reference, we provide a sample ft_tools configuration file.
To summarize, the Feather-Trace tools can be obtained and compiled with the following commands:
cd $DIR
wget http://www.litmus-rt.org/releases/2016.1/ft_tools-2016.1.tgz
tar xzf ft_tools-2016.1.tgz
cd ft_tools
wget http://www.litmus-rt.org/releases/2016.1/ft_tools-config
mv ft_tools-config .config
make