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Message-Id: <20120905.131615.1131246696009291033.davem@davemloft.net> Date: Wed, 05 Sep 2012 13:16:15 -0400 (EDT) From: David Miller <davem@...emloft.net> To: bhutchings@...arflare.com Cc: peppe.cavallaro@...com, netdev@...r.kernel.org Subject: Re: [net-next.git 4/7] stmmac: add Rx watchdog optimization to mitigate the DMA irqs From: Ben Hutchings <bhutchings@...arflare.com> Date: Wed, 5 Sep 2012 17:14:35 +0100 > On Wed, 2012-09-05 at 17:03 +0200, Giuseppe CAVALLARO wrote: >> GMAC devices newer than databook 3.50 has an embedded timer >> that can be used for mitigating the number of interrupts. >> So this patch adds this optimizations. >> Old MAC will continue to use NAPI. > [...] > > Interrupt moderation is *not* a substitute for NAPI; you should continue > using NAPI as well. Absolutely correct, these two facilities are _complementary_ not _exlusive_. In fact, the most optimal driver will use NAPI with relatively short HW mitigation settings. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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