Re: Multiport NICs - VLAN and Polling Support?
From: Kurt Jaeger (lists_at_complx.LF.net)
Date: Fri, 14 Oct 2005 20:12:39 +0200 To: Danial Thom <email@example.com>
> polling is almost never a performance advantage
> for ethernet, as virtually all modern controllers
> have some sort of interrupt moderation built-in.
We had the case on fbsd 5.4p7 with SMP where bge drivers produced
much slower throughput if we did not use polling. We measured using
ttcp and the difference was from 2-3Mbyte/sec to 11 Mbyte/sec.
Yes, it used more CPU, but for that increase in throughput, it
was worth the expense.
So it looks a bit strange from my part of the world to.
-- MfG/Best regards, Kurt Jaeger 15 years to go ! LF.net GmbH fon +49 711 90074-23 pi@LF.net Ruppmannstr. 27 fax +49 711 90074-33 D-70565 Stuttgart mob +49 171 3101372 _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-isp To unsubscribe, send any mail to "email@example.com"