From: Ming Zhang <mingz@ele.uri.edu>
To: open-iscsi <open-iscsi@googlegroups.com>
Cc: Dmitry Yusupov <dmitry_yus@yahoo.com>,
"David S. Miller" <davem@davemloft.net>,
mpm@selenic.com, andrea@suse.de, michaelc@cs.wisc.edu,
James.Bottomley@HansenPartnership.com,
ksummit-2005-discuss@thunk.org, netdev@oss.sgi.com
Subject: Re: Linux support for RDMA (was: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics)
Date: Mon, 04 Apr 2005 08:56:56 -0400 [thread overview]
Message-ID: <1112619415.2880.5.camel@localhost.localdomain> (raw)
In-Reply-To: <20050404063456.GB30855@colo.lackof.org>
yes, it travel 3 times instead of 1 time. and it is duplex. send traffic
will take another 20%. so total 80% or it can never run that fast.
ming
On Mon, 2005-04-04 at 02:34, Grant Grundler wrote:
> On Sun, Apr 03, 2005 at 05:56:11PM -0700, Dmitry Yusupov wrote:
> > I do not get your concern with memory BW. With good AMD box V40Z(SUN)
> > you can get 5.3GBytes/sec. Even with 10Gbps full speed you have 80%
> > left. PCI-X BUS BW is bigger concern...
>
> Yes and No. PCI-X isn't fast enough but the data only crosses
> the PCI-X bus once. Think about the data flow:
> 1) DMA to RAM
> 2) load into CPU cache
> 3) store back into RAM
>
> We are down to 40% left...graphics folks won't like you.
>
> grant
next prev parent reply other threads:[~2005-04-04 12:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-02 19:07 [Ksummit-2005-discuss] Summary of 2005 Kernel Summit ProposedTopics Asgeir Eiriksson
2005-04-02 19:14 ` Ming Zhang
2005-04-04 0:56 ` Linux support for RDMA (was: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics) Dmitry Yusupov
2005-04-04 6:34 ` Grant Grundler
2005-04-04 7:10 ` David S. Miller
2005-04-04 12:58 ` Ming Zhang
2005-04-04 16:31 ` Grant Grundler
2005-04-04 12:56 ` Ming Zhang [this message]
2005-04-04 16:54 ` Dmitry Yusupov
2005-04-04 19:11 ` Grant Grundler
-- strict thread matches above, loose matches on Subject: below --
2005-04-05 22:19 jaganav
2005-04-02 7:29 jaganav
2005-04-02 18:27 ` Matthew Wilcox
2005-04-03 1:26 ` Grant Grundler
2005-04-05 15:04 ` Rik van Riel
2005-04-01 2:13 jaganav
2005-04-01 23:43 ` Stephen Hemminger
2005-04-02 1:37 ` jaganav
2005-04-02 5:27 ` Greg KH
2005-04-02 6:02 ` Greg KH
2005-04-02 15:01 ` Andrea Arcangeli
2005-04-04 16:50 ` Stephen Hemminger
[not found] <4241D106.8050302@cs.wisc.edu>
[not found] ` <20050324101622S.fujita.tomonori@lab.ntt.co.jp>
[not found] ` <1111628393.1548.307.camel@beastie>
[not found] ` <20050324113312W.fujita.tomonori@lab.ntt.co.jp>
[not found] ` <1111633846.1548.318.camel@beastie>
[not found] ` <20050324215922.GT14202@opteron.random>
[not found] ` <424346FE.20704@cs.wisc.edu>
[not found] ` <20050324233921.GZ14202@opteron.random>
[not found] ` <20050325034341.GV32638@waste.org>
[not found] ` <20050327035149.GD4053@g5.random>
2005-03-27 5:48 ` [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics Matt Mackall
2005-03-27 6:33 ` Dmitry Yusupov
2005-03-27 6:46 ` David S. Miller
2005-03-28 19:45 ` Roland Dreier
[not found] ` <1112042936.5088.22.camel@beastie>
2005-03-28 22:32 ` Benjamin LaHaise
2005-03-29 3:19 ` Linux support for RDMA (was: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics) Roland Dreier
2005-03-30 16:00 ` Benjamin LaHaise
2005-03-29 3:14 ` Roland Dreier
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=1112619415.2880.5.camel@localhost.localdomain \
--to=mingz@ele.uri.edu \
--cc=James.Bottomley@HansenPartnership.com \
--cc=andrea@suse.de \
--cc=davem@davemloft.net \
--cc=dmitry_yus@yahoo.com \
--cc=ksummit-2005-discuss@thunk.org \
--cc=michaelc@cs.wisc.edu \
--cc=mpm@selenic.com \
--cc=netdev@oss.sgi.com \
--cc=open-iscsi@googlegroups.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.