From: Rob Herring <robherring2@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
jonathan@jonmasters.org,
Mark Langsdorf <mark.langsdorf@calxeda.com>,
Rob Herring <rob.herring@calxeda.com>,
Ben Hutchings <bhutchings@solarflare.com>
Subject: Re: [PATCH v2] net: calxedaxgmac: rework transmit ring handling
Date: Fri, 12 Oct 2012 15:21:59 -0500 [thread overview]
Message-ID: <ec408461-2f13-49eb-b9da-d3e092ff13f9@email.android.com> (raw)
In-Reply-To: <1350066620.21172.12996.camel@edumazet-glaptop>
Eric Dumazet <eric.dumazet@gmail.com> wrote:
>On Fri, 2012-10-12 at 13:04 -0500, Rob Herring wrote:
>> From: Rob Herring <rob.herring@calxeda.com>
>>
>> Only generate tx interrupts on every ring size / 4 descriptors. Move
>the
>> netif_stop_queue call to the end of the xmit function rather than
>> checking at the beginning.
>>
>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>> ---
>> v2:
>> - Add missed enabling of the descriptor tx interrupt
>
>Seems to be net-next material to me.
>
Perhaps, but the series as a whole is what I've been testing. This one has the least performance impact.
>Furthermore, your changelog is a bit terse for such a patch, that could
>easily break upper layers.
>
>You need to tell us how long TX completion for a packet might be
>deferred.
The prior behavior was only interrupting when done with all buffers. It now will interrupt before completely emptying the ring.
Rob
next prev parent reply other threads:[~2012-10-12 20:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-12 15:15 [PATCH 0/6] Calxeda xgmac performance fixes Rob Herring
2012-10-12 15:15 ` [PATCH 1/6] net: calxedaxgmac: enable operate on 2nd frame mode Rob Herring
2012-10-12 15:15 ` [PATCH 2/6] net: calxedaxgmac: remove explicit rx dma buffer polling Rob Herring
2012-10-12 15:15 ` [PATCH 3/6] net: calxedaxgmac: use relaxed i/o accessors in rx and tx paths Rob Herring
2012-10-12 15:15 ` [PATCH 4/6] net: calxedaxgmac: drop some unnecessary register writes Rob Herring
2012-10-12 15:15 ` [PATCH 5/6] net: calxedaxgmac: rework transmit ring handling Rob Herring
2012-10-12 16:28 ` Ben Hutchings
2012-10-12 17:01 ` Rob Herring
2012-10-12 18:04 ` [PATCH v2] " Rob Herring
2012-10-12 18:30 ` Eric Dumazet
2012-10-12 20:21 ` Rob Herring [this message]
2012-10-12 15:15 ` [PATCH 6/6] net: calxedaxgmac: ip align receive buffers Rob Herring
2012-10-29 17:52 ` [PATCH 0/6] Calxeda xgmac performance fixes Rob Herring
2012-10-29 18:06 ` David Miller
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