Messages in this thread |  | | Date | Tue, 17 Sep 2002 19:06:41 -0700 (PDT) | Subject | Re: Info: NAPI performance at "low" loads | From | "David S. Miller" <> |
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From: Jeff Garzik <jgarzik@mandrakesoft.com> Date: Tue, 17 Sep 2002 22:11:14 -0400
You're looking at at least one extra get-irq-status too, at least in the classical 10/100 drivers I'm used to seeing...
How so? The number of ones done in the e1000 NAPI code are the same (read register until no interesting status bits remain set, same as pre-NAPI e1000 driver).
For tg3 it's a cheap memory read from the status block not a PIO. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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