netdev - Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB

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Message-ID: <OFFFECFAD7.CF3FF115-ON6525733A.0020AE37-6525733A.00218365@in.ibm.com>
Date:	Fri, 17 Aug 2007 11:36:03 +0530
From:	Krishna Kumar2 <krkumar2@...ibm.com>
To:	David Miller <davem@...emloft.net>
Cc:	gaagaan@...il.com, general@...ts.openfabrics.org, hadi@...erus.ca,
	herbert@...dor.apana.org.au, jagana@...ibm.com, jeff@...zik.org,
	johnpol@....mipt.ru, kaber@...sh.net, kumarkr@...ux.ibm.com,
	mcarlson@...adcom.com, mchan@...adcom.com, netdev@...r.kernel.org,
	peter.p.waskiewicz.jr@...el.com, rdreier@...co.com,
	rick.jones2@...com, Robert.Olsson@...a.slu.se,
	shemminger@...ux-foundation.org, sri@...ibm.com, tgraf@...g.ch,
	xma@...ibm.com
Subject: Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB


Hi Dave,

> I ran 3 iterations of 45 sec tests (total 1 hour 16 min, but I will
> run a longer one tonight). The results are (results in KB/s, and %):

I ran a 8.5 hours run with no batching + another 8.5 hours run with
batching (Buffer sizes: "32 128 512 4096 16384", Threads: "1 8 32",
Each test run time: 3 minutes, Iterations to average: 5). TCP seems
to get a small improvement.

Thanks,

- KK

-------------------------------------------------------------------------------
                           TCP
                        -----------
Size:32 Procs:1             3415       3321       -2.75
Size:128 Procs:1           13094      13388      2.24
Size:512 Procs:1            49037      50683      3.35
Size:4096 Procs:1          114646     114619     -.02
Size:16384 Procs:1        114626     114644     .01

Size:32 Procs:8             22675      22633      -.18
Size:128 Procs:8            77994      77297      -.89
Size:512 Procs:8            114716     114711     0
Size:4096 Procs:8          114637     114636     0
Size:16384 Procs:8         95814      114638     19.64

Size:32 Procs:32            23240      23349      .46
Size:128 Procs:32          82284      82247      -.04
Size:512 Procs:32          114885     114769     -.10
Size:4096 Procs:32         95735      114634     19.74
Size:16384 Procs:32       114736     114641     -.08

Average:                        1151534    1190210    3.36%
-------------------------------------------------------------------------------
                        No Delay:
                        ---------
Size:32 Procs:1             3002       2873       -4.29
Size:128 Procs:1           11853      11801      -.43
Size:512 Procs:1           45565      45837      .59
Size:4096 Procs:1         114511     114485     -.02
Size:16384 Procs:1        114521     114555     .02

Size:32 Procs:8             8026       8029       .03
Size:128 Procs:8           31589      31573      -.05
Size:512 Procs:8           111506     105766     -5.14
Size:4096 Procs:8         114455     114454     0
Size:16384 Procs:8        95833      114491     19.46

Size:32 Procs:32            8005       8027       .27
Size:128 Procs:32          31475      31505      .09
Size:512 Procs:32          114558     113687     -.76
Size:4096 Procs:32        114784     114447     -.29
Size:16384 Procs:32       114719     114496     -.19

Average:                         1046026    1034402    -1.11%
-------------------------------------------------------------------------------

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