Investigation into the Effects of e1000 version 5.2.20 Module Parameters on TCP Traffic
Date November 2003
The purpose of this investigation is to quantify and qualify the effects of the various modules parameters within the e1000 5.2.20 driver on TCP traffic. The introduction of the 5.2.20 driver brings along a couple of new features:
A series of tests will be performed; back to back and across the MBNG network. It is preferential to try tcp tests across longer bandwidth delay products (MBNG is only 750kB), however, due to hardware constraints, this was not possible.
The following variables will be investigated, both with and without the NAPI enabled. The InterruptThrottleRate was set to auto (1).
The tests were conducted with modified 2.4.20 kernels. The kernel was altAIMD version 0.2. Tests were conducted with the vanilla kernel with ABC disabled and moderate_cwnd() off.
Txqueuelens were set to a value greater than anticipated (2000) for all tests.
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