Messages in this thread | | | Date | Thu, 2 May 2002 02:14:33 +0200 (CEST) | From | Steffen Persvold <> | Subject | RE: Plan for e100-e1000 in mainline |
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On Wed, 1 May 2002, Leech, Christopher wrote:
> > > Another funny thing is that the latency for the gigabit > > adapter (e1000) is also higher than fast ethernet (eepro100) > > with small messages (<256 bytes) : > > You could try setting the RxIntDelay module parameter to 0, that should > improve round trip latency. The balance between latency on the receive path > and interrupt rate can be difficult to manage, hopefully a dynamic method > like NAPI will result in Ethernet drivers that need less hand tuning. >
Hmm the docs say that RxIntDelay is by default 0 but when I tried it, it helped for sure (although the numbers are still a bit higher that with eepro100).
Thanks, -- Steffen Persvold | Scalable Linux Systems | Try out the world's best mailto:sp@scali.com | http://www.scali.com | performing MPI implementation: Tel: (+47) 2262 8950 | Olaf Helsets vei 6 | - ScaMPI 1.13.8 - Fax: (+47) 2262 8951 | N0621 Oslo, NORWAY | >320MBytes/s and <4uS latency
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