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Message-ID: <20071016172517.GA8120@electric-eye.fr.zoreil.com> Date: Tue, 16 Oct 2007 19:25:17 +0200 From: Francois Romieu <romieu@...zoreil.com> To: Vladislav Bolkhovitin <vst@...b.net> Cc: LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org Subject: Re: r8169 & TX offload (please remove l-k from the Cc:, this ought to be sent to netdev) Vladislav Bolkhovitin <vst@...b.net> : > > I've recently bought Realtek RTL8169S-32 chip based Gigabit Ethernet card: > > # lspci -vv [...] > I've noticed that all TX offload features (tx-checksumming, > scatter-gather and TSO) are disabled by default and should be manually > enabled by ethtool. I wonder, is there any particular reason for that? As far as I can tell, it is mostly a lack of pressure from the users and my desire to avoid a change of behavior. > Why they are not enabled by default as it was done for e1000 or tg3? Are > there any hidden drawbacks in enabling them? None that I know of. I had not noticed a huge difference and people did not comment a lot either... > Those offload options are definitely work. They give in my setup (32-bit > 66MHz PCI, Xeon 1.7GHz CPU, open-iscsi) CPU offload from 75% to 45% and > data write throughput improvement from 55MB/s to 59MB/s. ...but your datapoint is welcome. -- Ueimor - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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