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recommend to disable Linux NO_HZ feature

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Stefan Lankes 2016-06-27 12:28:38 +02:00
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README.md
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@ -32,7 +32,7 @@ HermitCore is the result of a research project at RWTH Aachen University and is
1. In principle you have to follow the tutorial above. After the configuration (step 2 in the above tutorial) go to the subdirectory `linux`, which contains the source code of the Linux kernel. Configure the kernel with `make menuconfig` for your system. Be sure, that the option `CONFIG_HERMIT_CORE` in `Processor type and features` is enabled.
2. Go back to the root directory of this repository and build with `make` the Linux kernel, the HermitCore kernel, the cross-compiler and the demo applications.
3. Install the Linux kernel and its initial ramdisk on your system (see descriptions of your Linux distribution).
3. Install the Linux kernel and its initial ramdisk on your system (see descriptions of your Linux distribution). We recommend to disable Linux NO_HZ feature by setting the kernel parameter `no_hz=off`. This feature reduces partly the OS noise, but noise sensitive applications should now run on HermitCore.
4. Register the HermitCore loader to your system with following command: `echo ":hermit:M:7:\\x42:/path2proyxy/proxy:" > /proc/sys/fs/binfmt_misc/register`, in which `path2proxy` defines the path to the loader. You find the loader `proxy` after building the HermiCore sources in the subdirectory `hermit/tools` of the directory, which contains this *README*.
5. The IP device between HermitCore and Linux does currently not support IPv6. Consequently, disable IPv6 by adding following line to `/etc/sysctl.conf`: `net.ipv6.conf.mmnif.disable_ipv6 = 1`.
6. Per default, the IP device uses a static IP address range. Linux has to use `162.168.28.1`, where HermitCore isles start with `192.168.28.2` (isle 0). The network manager must be configured accordingly and consequently the file `/etc/sysconfig/network-scripts/ifcfg-mmnif` must be created with following contents: