[Bloat] Random idea in reaction to all the discussion of TCP flavours - timestamps?

Jonathan Morton chromatix99 at gmail.com
Tue Mar 15 17:49:42 PDT 2011


On 16 Mar, 2011, at 1:46 am, Dave Täht wrote:

>> 1) Wired devices, where we want to push more 10+ Gbps, so we can assume
>> a posted skb is transmitted immediately. Even a basic qdisc can be a
>> performance bottleneck. Set TX ring size to 256 or 1024+ buffers to
>> avoid taking too many interrupts.
> 
> To talk to this a bit, the huge dynamic range discrepancy between a
> 10GigE device and what it may be connected to worries me. Some form of
> fair queuing should be applied before the data hits the driver.

You mean plugging a 10GigE card into a 10Base-T hub?  :-D

For less ridiculous topologies, the queues would mostly be in other devices.

 - Jonathan



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