From: David Vrabel <david.vrabel@citrix.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: annie.li@oracle.com, konrad.wilk@oracle.com,
ian.campbell@citrix.com, xen-devel@lists.xen.org
Subject: Re: [PATCH 1/3] xen-netback: remove page tracking facility
Date: Tue, 28 May 2013 10:21:32 +0100 [thread overview]
Message-ID: <51A4771C.9070808@citrix.com> (raw)
In-Reply-To: <1369654183-10536-2-git-send-email-wei.liu2@citrix.com>
On 27/05/13 12:29, Wei Liu wrote:
> The data flow from DomU to DomU on the same host:
>
> With tracking facility:
>
> copy
> DomU --------> Dom0 DomU
> | ^
> |____________________________|
> copy
>
> In other words, we can always copy page from Dom0, thus removing the
> need for a tracking facility.
>
> copy copy
> DomU --------> Dom0 -------> DomU
>
> Simple iperf test shows no performance regression (obviously we do two
> copy's anyway):
>
> W/ tracking: ~5.3Gb/s
> W/o tracking: ~5.4Gb/s
>
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>
> ---
> drivers/net/xen-netback/netback.c | 77 +------------------------------------
> 1 file changed, 2 insertions(+), 75 deletions(-)
Nice! This is the sort of patch I like.
David
next prev parent reply other threads:[~2013-05-28 9:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-27 11:29 [PATCH 0/3 V2] xen-netback: switch to NAPI + kthread 1:1 model Wei Liu
2013-05-27 11:29 ` [PATCH 1/3] xen-netback: remove page tracking facility Wei Liu
2013-05-28 9:21 ` David Vrabel [this message]
2013-05-29 1:43 ` Matt Wilson
2013-05-29 8:12 ` Wei Liu
2013-05-27 11:29 ` [PATCH 2/3] xen-netback: switch to per-cpu scratch space Wei Liu
2013-05-28 9:47 ` annie li
2013-05-28 10:17 ` Wei Liu
2013-05-28 13:18 ` Konrad Rzeszutek Wilk
2013-05-28 13:36 ` David Vrabel
2013-05-28 13:54 ` Wei Liu
2013-05-27 11:29 ` [PATCH 3/3] xen-netback: switch to NAPI + kthread 1:1 model Wei Liu
2013-05-28 13:37 ` David Vrabel
2013-05-28 13:40 ` Wei Liu
2013-05-28 14:35 ` [PATCH 0/3 V2] " annie li
2013-05-28 15:09 ` Wei Liu
2013-06-11 10:06 ` David Vrabel
2013-06-11 10:15 ` Wei Liu
2013-06-12 13:44 ` Andrew Bennieston
2013-06-13 9:01 ` Wei Liu
2013-06-13 11:18 ` Andrew Bennieston
2013-06-13 13:06 ` Wei Liu
2013-07-03 12:45 ` Andrew Bennieston
2013-07-03 16:07 ` Wei Liu
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