From: Gal Pressman <gal@nvidia.com>
To: Jakub Kicinski <kuba@kernel.org>, Daniele Palmas <dnlplm@gmail.com>
Cc: "David Miller" <davem@davemloft.net>,
"Paolo Abeni" <pabeni@redhat.com>,
"Eric Dumazet" <edumazet@google.com>,
"Subash Abhinov Kasiviswanathan" <quic_subashab@quicinc.com>,
"Sean Tranchetti" <quic_stranche@quicinc.com>,
"Jonathan Corbet" <corbet@lwn.net>, "Bjørn Mork" <bjorn@mork.no>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next 1/3] ethtool: add tx aggregation parameters
Date: Sun, 13 Nov 2022 11:48:37 +0200 [thread overview]
Message-ID: <8b0aba42-627a-f5f5-a9ec-237b69b3b03f@nvidia.com> (raw)
In-Reply-To: <20221111090720.278326d1@kernel.org>
On 11/11/2022 19:07, Jakub Kicinski wrote:
> On Wed, 9 Nov 2022 19:02:47 +0100 Daniele Palmas wrote:
>> Add the following ethtool tx aggregation parameters:
>>
>> ETHTOOL_A_COALESCE_TX_MAX_AGGR_SIZE
>> Maximum size of an aggregated block of frames in tx.
> perhaps s/size/bytes/ ? Or just mention bytes in the doc? I think it's
> the first argument in coalescing expressed in bytes, so to avoid
> confusion we should state that clearly.
>
>> ETHTOOL_A_COALESCE_TX_MAX_AGGR_FRAMES
>> Maximum number of frames that can be aggregated into a block.
>>
>> ETHTOOL_A_COALESCE_TX_USECS_AGGR_TIME
>> Time in usecs after the first packet arrival in an aggregated
>> block for the block to be sent.
> Can we add this info to the ethtool-netlink.rst doc?
>
> Can we also add a couple of sentences describing what aggregation is?
> Something about copying the packets into a contiguous buffer to submit
> as one large IO operation, usually found on USB adapters?
>
> People with very different device needs will read this and may pattern
> match the parameters to something completely different like just
> delaying ringing the doorbell. So even if things seem obvious they are
> worth documenting.
Seems like I am these people, I was under the impression this is kind of
a threshold for xmit more or something?
What is this contiguous buffer? Isn't this the same as TX copybreak? TX
copybreak for multiple packets?
next prev parent reply other threads:[~2022-11-13 9:48 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-09 18:02 [PATCH net-next 0/3] add tx packets aggregation to ethtool and rmnet Daniele Palmas
2022-11-09 18:02 ` [PATCH net-next 1/3] ethtool: add tx aggregation parameters Daniele Palmas
2022-11-11 17:07 ` Jakub Kicinski
2022-11-11 21:51 ` Daniele Palmas
2022-11-13 9:48 ` Gal Pressman [this message]
2022-11-14 10:06 ` Daniele Palmas
2022-11-14 10:45 ` Dave Taht
2022-11-15 11:51 ` Daniele Palmas
2022-11-15 15:27 ` Dave Taht
2022-11-15 0:42 ` Jakub Kicinski
2022-11-15 10:59 ` Gal Pressman
2022-11-15 16:21 ` Jakub Kicinski
2022-11-09 18:02 ` [PATCH net-next 2/3] net: qualcomm: rmnet: add tx packets aggregation Daniele Palmas
2022-11-10 17:32 ` Alexander Lobakin
2022-11-11 1:17 ` Subash Abhinov Kasiviswanathan (KS)
2022-11-11 17:11 ` Jakub Kicinski
2022-11-11 22:00 ` Daniele Palmas
2022-11-14 8:48 ` Daniele Palmas
2022-11-11 17:23 ` Daniele Palmas
2022-11-16 15:19 ` Daniele Palmas
2022-11-16 16:20 ` Alexander Lobakin
2022-11-20 9:25 ` Daniele Palmas
2022-11-20 9:39 ` Bjørn Mork
2022-11-20 9:52 ` Daniele Palmas
2022-11-20 17:48 ` Subash Abhinov Kasiviswanathan (KS)
2022-11-21 7:00 ` Daniele Palmas
2022-11-24 3:32 ` Subash Abhinov Kasiviswanathan (KS)
2022-11-10 19:09 ` kernel test robot
2022-11-11 17:14 ` Jakub Kicinski
2022-11-14 9:13 ` Daniele Palmas
2022-11-14 10:25 ` Bjørn Mork
2022-11-15 0:43 ` Jakub Kicinski
2022-11-09 18:02 ` [PATCH net-next 3/3] net: qualcomm: rmnet: add ethtool support for configuring tx aggregation Daniele Palmas
2022-11-11 6:46 ` kernel test robot
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