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Date: Wed, 07 Oct 2009 07:17:46 +0200 From: Brice Goglin <bgoglin@...e.fr> To: Rick Jones <rick.jones2@...com> CC: David Miller <davem@...emloft.net>, brice@...i.com, netdev@...r.kernel.org, gallatin@...i.com Subject: Re: [PATCH net-next] myri10ge: add adaptive coalescing Rick Jones wrote: > David Miller wrote: >> From: Brice Goglin <brice@...i.com> >> Date: Tue, 06 Oct 2009 18:52:43 +0200 >> >> >>> This patch adds support for adaptive interrupt coalescing to the >>> myri10ge driver. It is based on the host periodically look at >>> statistics and update the NIC coalescing accordingly. >>> >>> The NIC only provides packet throughput and we feel that it is a >>> better heuristics than the packet rate heuristics currently used >>> in ethtool. Also, assuming that the packet packet rate heuristics >>> uses what is actually sent on the wire when using TSO, it would be >>> much more expensive to implement correctly, as the driver would >>> need to calculate how many packets were sent. >>> >>> Signed-off-by: Andrew Gallatin <gallatin@...i.com> >>> Signed-off-by: Brice Goglin <brice@...i.com> >> >> >> Drivers tried to do this as far back as 6 years ago (tg3) and we don't >> recommend doing this with NAPI drivers. > > Doesn't e1000(e) still try to do adaptive coalescing? mlx_en, benet, sfc, ... do as well. Brice -- 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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