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Date:      Mon, 06 Jan 2003 21:13:08 -0800
From:      Lars Eggert <larse@ISI.EDU>
To:        shubha mr <shubha_mr@yahoo.com>
Cc:        freebsd-net@FreeBSD.org
Subject:   Re: NIC throughput on multiprocessor low.
Message-ID:  <3E1A61E4.40308@isi.edu>
In-Reply-To: <20030107042612.18203.qmail@web41207.mail.yahoo.com>
References:  <20030107042612.18203.qmail@web41207.mail.yahoo.com>
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[-- Attachment #1 --]
On 1/6/2003 8:26 PM, shubha mr wrote:
>
> very surprisingly my ethernet gigabit NIC's
> performance (in MBPS) is more in single processor
> machine than in a dual processor machine.The tool used
> to measure the thruput was chariot.Is this due to
> cache issues? Any ideas to resolve this strange
> problem?

You'll have to provide sustantially more information before a diagnosis 
can be started.

Which version of FreeBSD? Network topology? Which hardware (CPU, NICs, 
memory), and you did measure the same setup once with one and one with 
two CPUs (and not different setups/machines), right?

Finally, what were the numbers you got when you measured (and what is 
chariot)?

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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