Steffen Vogel
2baff4d9a4
added more examples git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@98 8ec27952-4edc-4aab-86aa-e87bb2611832
1.5 KiB
Configuration
File
The server gets exclusively configured by its configuration file.
The following sections describes the available options. Take a look in the 'Examples' section for some examples.
Global
- name:
- affinity
Nodes
Paths
Tuning
Operating System and Kernel
For minimum latency several kernel and driver settings can be optimized. A RT-preemp patched Linux kernel is recommended. Precompiled kernels for Fedora can be found here: http://ccrma.stanford.edu/planetccrma/software/
-
Map NIC IRQs => see setting
affinity -
Map Tasks => see setting
affinity- Kernel command line: isolcpus=[cpu_number]
-
Nice Task => see setting
priority -
Increase socket priority
-
Configure NIC interrupt coalescence with
ethtool:ethtool -C|--coalesce devname [adaptive-rx on|off] [adaptive-tx on|off] ...
-
Configure NIC kernel driver in
/etc/modprobe.d/e1000e.conf:More conservative interrupt throttling for better latency
https://www.kernel.org/doc/Documentation/networking/e1000e.txt
option e1000e InterruptThrottleRate=
Hardware
This are some proposals for the selection of appropriate server hardware:
- Server-grade CPU: Intel Xeon
- A multi-core systems allows parallization of send/receive paths.
- Server-grade network cards: Intel PRO/1000
- These allow offloading of UDP checksumming to the hardware
\example etc/loopback.conf \example etc/example.conf