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Speed Tweaks
"Atomic batteries to power. Turbines to speed."
Robin, Batman
Macs and Linux
MacOS
The Macintosh OS doesn't have a registry. It controls communications through the Open Transport layer. Like a Windows machine, it comes preset to handle dial-up modems and Ethernet connections. Neither of these settings take advantage of a high-speed modem's unique abilities.
To tweak the Open Transport layer of the Macintosh, we recommend a product called "OT Advanced Tuner." It is available from Sustainable Softworks. (We have no business relationship with this company.)
OT Advanced Tuner shows up as a control panel in the Macintosh. It can modify over 30 communiction paramaters, including the ones discussed for Windows systems. Besides manually tweaking the parameters, you can use one of the pre-configured settings or let it automatically adjust your settings.
Linux (versions 2.1.1 and greater)
To tune the discussed parameters in Linux, you will not need to mess with anything like a Windows Registry, but you will need a text editor like Vi or Emacs. There is no sysctl application for these values, but editing the values in the following files will change the values in the kernel:
/proc/sys/net/core/rmem_default :default receive window
/proc/sys/net/core/rmem_max :maximum receive window
/proc/sys/net/core/wmem_default :default send window
/proc/sys/net/core/wmem_max :maximum send window
Please consult the documentation for your system in: /LINUX-SOURCE-DIR/include/linux/skbuff.h
For more information on tweaking your Linux system, read "Enabling High Performance Data Transfers" at the Pittsburgh Supercomputing Center website.
