From: Andi Kleen <andi@firstfloor.org>
To: "Felix Marti" <felix@chelsio.com>
Cc: "David Miller" <davem@davemloft.net>,
jeff@garzik.org, netdev@vger.kernel.org, rdreier@cisco.com,
linux-kernel@vger.kernel.org, general@lists.openfabrics.org
Subject: Re: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCPportsfrom the host TCP port space.
Date: 20 Aug 2007 01:27:35 +0200 [thread overview]
Message-ID: <p73hcmv14wo.fsf@bingen.suse.de> (raw)
In-Reply-To: <8A71B368A89016469F72CD08050AD334018E209C@maui.asicdesigners.com>
"Felix Marti" <felix@chelsio.com> writes:
> what benefits does the TSO infrastructure give the
> non-TSO capable devices?
It improves performance on software queueing devices between guests
and hypervisors. This is a more and more important application these
days. Even when the system running the Hypervisor has a non TSO
capable device in the end it'll still save CPU cycles this way. Right now
virtualized IO tends to much more CPU intensive than direct IO so any
help it can get is beneficial.
It also makes loopback faster, although given that's probably not that
useful.
And a lot of the "TSO infrastructure" was needed for zero copy TX anyways,
which benefits most reasonable modern NICs (anything with hardware
checksumming)
-Andi
next prev parent reply other threads:[~2007-08-19 22:33 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-07 14:37 [PATCH RFC] RDMA/CMA: Allocate PS_TCP ports from the host TCP port space Steve Wise
2007-08-07 14:54 ` Evgeniy Polyakov
2007-08-07 15:06 ` Steve Wise
2007-08-07 15:39 ` Evgeniy Polyakov
2007-08-09 18:49 ` Steve Wise
2007-08-09 21:40 ` [ofa-general] " Sean Hefty
2007-08-09 21:55 ` David Miller
2007-08-09 23:22 ` Sean Hefty
2007-08-15 14:42 ` Steve Wise
2007-08-16 2:26 ` Jeff Garzik
2007-08-16 3:11 ` Roland Dreier
2007-08-16 3:27 ` [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCP portsfrom " Sean Hefty
2007-08-16 13:43 ` [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCP ports from " Tom Tucker
2007-08-16 21:17 ` David Miller
2007-08-17 19:52 ` Roland Dreier
2007-08-17 21:27 ` David Miller
2007-08-17 23:31 ` Roland Dreier
2007-08-18 0:00 ` David Miller
2007-08-18 5:23 ` Roland Dreier
2007-08-18 6:44 ` David Miller
2007-08-19 7:01 ` [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCP portsfrom " Sean Hefty
2007-08-19 7:23 ` David Miller
2007-08-19 17:33 ` [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCPportsfrom " Felix Marti
2007-08-19 19:32 ` David Miller
2007-08-19 19:49 ` Felix Marti
2007-08-19 23:04 ` David Miller
2007-08-20 0:32 ` Felix Marti
2007-08-20 0:40 ` David Miller
2007-08-20 0:47 ` Felix Marti
2007-08-20 1:05 ` David Miller
2007-08-20 1:41 ` Felix Marti
2007-08-20 11:07 ` Andi Kleen
2007-08-20 16:26 ` Felix Marti
2007-08-20 19:16 ` Rick Jones
2007-08-20 9:43 ` Evgeniy Polyakov
2007-08-20 16:53 ` Felix Marti
2007-08-20 18:10 ` Andi Kleen
2007-08-20 19:02 ` Felix Marti
2007-08-20 20:18 ` Thomas Graf
2007-08-20 20:33 ` Andi Kleen
2007-08-20 20:33 ` Patrick Geoffray
2007-08-21 4:21 ` Felix Marti
2007-08-19 23:27 ` Andi Kleen [this message]
2007-08-19 23:12 ` David Miller
2007-08-20 1:45 ` Felix Marti
2007-08-20 0:18 ` Herbert Xu
2007-08-21 1:16 ` [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCP ports from " Roland Dreier
2007-08-21 6:58 ` David Miller
2007-08-28 19:38 ` Roland Dreier
2007-08-28 20:43 ` David Miller
2007-10-08 21:54 ` Steve Wise
2007-10-09 13:44 ` James Lentini
2007-10-10 21:01 ` Sean Hefty
2007-10-10 23:04 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=p73hcmv14wo.fsf@bingen.suse.de \
--to=andi@firstfloor.org \
--cc=davem@davemloft.net \
--cc=felix@chelsio.com \
--cc=general@lists.openfabrics.org \
--cc=jeff@garzik.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=rdreier@cisco.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox