From: David Miller <davem@davemloft.net>
To: krkumar2@in.ibm.com
Cc: johnpol@2ka.mipt.ru, jagana@us.ibm.com,
peter.p.waskiewicz.jr@intel.com, herbert@gondor.apana.org.au,
gaagaan@gmail.com, Robert.Olsson@data.slu.se,
kumarkr@linux.ibm.com, rdreier@cisco.com, mcarlson@broadcom.com,
jeff@garzik.org, hadi@cyberus.ca, general@lists.openfabrics.org,
mchan@broadcom.com, tgraf@suug.ch, netdev@vger.kernel.org,
shemminger@linux-foundation.org, kaber@trash.net, sri@us.ibm.com
Subject: [ofa-general] Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB
Date: Wed, 08 Aug 2007 03:49:00 -0700 (PDT) [thread overview]
Message-ID: <20070808.034900.85820906.davem@davemloft.net> (raw)
In-Reply-To: <20070808093114.15396.22797.sendpatchset@localhost.localdomain>
From: Krishna Kumar <krkumar2@in.ibm.com>
Date: Wed, 08 Aug 2007 15:01:14 +0530
> RESULTS: The performance improvement for TCP No Delay is in the range of -8%
> to 320% (with -8% being the sole negative), with many individual tests
> giving 50% or more improvement (I think it is to do with the hw slots
> getting full quicker resulting in more batching when the queue gets
> woken). The results for TCP is in the range of -11% to 93%, with most
> of the tests (8/12) giving improvements.
Not because I think it obviates your work, but rather because I'm
curious, could you test a TSO-in-hardware driver converted to
batching and see how TSO alone compares to batching for a pure
TCP workload?
I personally don't think it will help for that case at all as
TSO likely does better job of coalescing the work _and_ reducing
bus traffic as well as work in the TCP stack.
next prev parent reply other threads:[~2007-08-08 10:49 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-08 9:31 [ofa-general] [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB Krishna Kumar
2007-08-08 9:31 ` [PATCH 1/9 Rev3] [Doc] HOWTO Documentation for batching Krishna Kumar
2007-08-08 9:31 ` [PATCH 2/9 Rev3] [core] Add skb_blist & hard_start_xmit_batch Krishna Kumar
2007-08-08 10:59 ` [ofa-general] " Stephen Hemminger
2007-08-08 11:24 ` Krishna Kumar2
2007-08-08 12:01 ` Evgeniy Polyakov
2007-08-09 3:09 ` Krishna Kumar2
2007-08-08 9:31 ` [PATCH 3/9 Rev3] [sched] Modify qdisc_run to support batching Krishna Kumar
2007-08-08 12:14 ` [ofa-general] " Evgeniy Polyakov
2007-08-09 3:13 ` Krishna Kumar2
2007-08-08 14:05 ` Patrick McHardy
2007-08-08 15:26 ` [ofa-general] " jamal
2007-08-09 4:06 ` Krishna Kumar2
2007-08-08 9:31 ` [PATCH 4/9 Rev3] [ethtool] Add ethtool support Krishna Kumar
2007-08-08 9:32 ` [ofa-general] [PATCH 5/9 Rev3] [IPoIB] Header file changes Krishna Kumar
2007-08-08 9:32 ` [ofa-general] [PATCH 6/9 Rev3] [IPoIB] CM & Multicast changes Krishna Kumar
2007-08-08 9:32 ` [ofa-general] [PATCH 7/9 Rev3] [IPoIB] Verb changes Krishna Kumar
2007-08-08 9:32 ` [PATCH 8/9 Rev3] [IPoIB] Post and work completion handler changes Krishna Kumar
2007-08-08 9:32 ` [PATCH 9/9 Rev3] [IPoIB] Implement the new batching API Krishna Kumar
2007-08-08 10:49 ` David Miller [this message]
2007-08-08 11:09 ` [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB Krishna Kumar2
2007-08-08 22:01 ` [ofa-general] " David Miller
2007-08-09 4:19 ` Krishna Kumar2
2007-08-09 4:27 ` David Miller
2007-08-09 6:26 ` Krishna Kumar2
2007-08-08 13:42 ` [ofa-general] " Herbert Xu
2007-08-08 15:14 ` jamal
2007-08-08 20:55 ` Stephen Hemminger
2007-08-08 22:40 ` jamal
2007-08-08 22:22 ` David Miller
2007-08-08 22:53 ` jamal
2007-08-09 0:06 ` Shirley Ma
2007-08-09 3:19 ` [ofa-general] " Krishna Kumar2
2007-08-14 9:02 ` Krishna Kumar2
-- strict thread matches above, loose matches on Subject: below --
2007-08-17 6:06 Krishna Kumar2
2007-08-21 7:18 ` David Miller
2007-08-21 12:30 ` [ofa-general] " jamal
2007-08-21 18:51 ` David Miller
2007-08-21 21:09 ` jamal
2007-08-22 4:11 ` Krishna Kumar2
2007-08-22 4:22 ` David Miller
2007-08-22 17:09 ` Rick Jones
2007-08-22 20:21 ` David Miller
2007-08-23 22:04 ` [ofa-general] " jamal
2007-08-23 22:25 ` jamal
2007-08-23 22:35 ` [ofa-general] " Rick Jones
2007-08-23 22:41 ` jamal
2007-08-24 3:18 ` Bill Fink
2007-08-24 12:14 ` jamal
2007-08-24 18:08 ` Bill Fink
2007-08-24 21:25 ` David Miller
2007-08-24 18:46 ` Rick Jones
2007-08-25 0:42 ` John Heffner
2007-08-26 8:41 ` [ofa-general] " Bill Fink
2007-08-27 1:32 ` John Heffner
2007-08-27 2:04 ` David Miller
2007-08-27 23:23 ` jamal
2007-09-14 7:20 ` [ofa-general] " Bill Fink
2007-08-23 22:30 ` David Miller
2007-08-23 22:38 ` [ofa-general] " jamal
2007-08-24 3:34 ` Stephen Hemminger
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=20070808.034900.85820906.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=Robert.Olsson@data.slu.se \
--cc=gaagaan@gmail.com \
--cc=general@lists.openfabrics.org \
--cc=hadi@cyberus.ca \
--cc=herbert@gondor.apana.org.au \
--cc=jagana@us.ibm.com \
--cc=jeff@garzik.org \
--cc=johnpol@2ka.mipt.ru \
--cc=kaber@trash.net \
--cc=krkumar2@in.ibm.com \
--cc=kumarkr@linux.ibm.com \
--cc=mcarlson@broadcom.com \
--cc=mchan@broadcom.com \
--cc=netdev@vger.kernel.org \
--cc=peter.p.waskiewicz.jr@intel.com \
--cc=rdreier@cisco.com \
--cc=shemminger@linux-foundation.org \
--cc=sri@us.ibm.com \
--cc=tgraf@suug.ch \
/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;
as well as URLs for NNTP newsgroup(s).