From: Jeff Garzik <jeff@garzik.org>
To: Don Fry <pcnet32@verizon.net>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH ] pcnet32: Fix PCnet32 performance bug on non-coherent architecutres
Date: Tue, 06 Mar 2007 06:15:22 -0500 [thread overview]
Message-ID: <45ED4D4A.3020004@garzik.org> (raw)
In-Reply-To: <20070306021309.GB7139@verizon.net>
Don Fry wrote:
> The PCnet32 driver always passed the the size of the largest possible packet
> to the pci_dma_sync_single_for_cpu and pci_dma_sync_single_for_device.
> This results in a fairly large "colateral damage" in the caches and makes
> the flush operation itself much slower. On a system with a 40MHz CPU this
> patch increases network bandwidth by about 12%.
>
> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
> Acked-by: Don Fry <pcnet32@verizon.net>
applied
prev parent reply other threads:[~2007-03-06 11:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-06 2:13 [PATCH ] pcnet32: Fix PCnet32 performance bug on non-coherent architecutres Don Fry
2007-03-06 11:15 ` Jeff Garzik [this message]
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