From: Jarek Poplawski <jarkao2@gmail•com>
To: Ofer Heifetz <oferh@marvell•com>
Cc: Eric Dumazet <eric.dumazet@gmail•com>,
Changli Gao <xiaosuo@gmail•com>, Jens Axboe <axboe@kernel•dk>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>
Subject: Re: Splice status
Date: Mon, 26 Jul 2010 22:37:52 +0200 [thread overview]
Message-ID: <4C4DF220.1050307@gmail.com> (raw)
In-Reply-To: <EE71107DF0D1F24FA2D95041E64AB9E80114797BC8AB@IL-MB01.marvell.com>
Ofer Heifetz wrote, On 25.07.2010 16:47:
> Hi Eric,
>
> Still trying to get better performance with splice, I noticed that when using splice there are twice the file size memcpy (placed a counter in memcpy), I verified it via samba file transfer and splice-fromnet/out.
>
> I also used the splice-fromnet/out and using ftrace I did notice that data is copied twice using these routines: skb_splice_bits, pipe_to_file.
I'm not sure you're using optimal NIC for splice, which should use
skbs with almost all data paged (non-linear), like niu or myri10ge.
Jarek P.
next prev parent reply other threads:[~2010-07-26 20:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-05 9:26 Splice status Ofer Heifetz
2010-07-05 9:59 ` Changli Gao
2010-07-05 10:52 ` Ofer Heifetz
2010-07-05 12:08 ` Changli Gao
2010-07-05 12:50 ` Eric Dumazet
2010-07-05 13:47 ` Ofer Heifetz
2010-07-05 15:34 ` Eric Dumazet
2010-07-06 2:01 ` Changli Gao
2010-07-06 2:36 ` Ofer Heifetz
2010-07-06 3:56 ` Eric Dumazet
2010-07-11 13:08 ` Changli Gao
2010-07-13 11:41 ` Ofer Heifetz
2010-07-13 12:32 ` Changli Gao
2010-07-13 12:42 ` Ofer Heifetz
2010-07-13 13:58 ` Changli Gao
2010-07-13 14:40 ` Ofer Heifetz
2010-07-13 14:11 ` Eric Dumazet
2010-07-14 15:08 ` Ofer Heifetz
2010-07-15 3:47 ` Ofer Heifetz
2010-07-25 14:47 ` Ofer Heifetz
2010-07-26 7:41 ` Changli Gao
2010-07-26 20:37 ` Jarek Poplawski [this message]
2010-07-26 20:50 ` Eric Dumazet
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