Re: [FW-1] AW: [FW-1] Solaris vs. Linux for performance of VPN communication

[Wen Guangcheng <wen@FW1-NOSPAMBS2.QNES.NEC.CO.JP>]

Hello,
Thank you so much for your kindly help.
The PCI bus of my Netra T1 200 is 32bit/33MHz and I guess my Linux box have
the same one. So the VPN performance of Linux  is better than Solaris perhaps.

Regards,

--Wen

----- Original Message -----
From: "Volker Tanger" <volker.tanger@DISCON.DE>
To: <FW-1-MAILINGLIST@beethoven.us.checkpoint.com>
Sent: Friday, February 07, 2003 5:57 PM
Subject: Re: [FW-1] AW: [FW-1] Solaris vs. Linux for performance of VPN communicati on


> Greetings!
>
> Guangcheng Wen wrote:
> > I am not sure how much of my Linux's system bus is. How to know it?
>
> PCI:
> 64bit vs. 32bit - identifyable simply by looking at. The 32bit are the
> "normal" PCI busses, whereas the 64bit are nearly double size.
>
> 33MHz vs. 66MHz - for this you'll have to look at the specs of your
> motherboard.
>
> Simple multiplication yields bus' maximum theoretical upper
> transferlimit - you'll have to subtract protocol overhead. So we get
>
>         ~1 Gbit/s       32bit/33MHz  (Standard PCI)
>         ~2 Gbit/s       64bit/33MHz or 32bit/66MHz
>         ~4 Gbit/s       64bit/66MHz
>
> That's the limit for the PCI bus - which is not the only bottleneck in a
> system's architecture. Most Sun machines (workgroup and medium range
> servers) with the new Blade backplane only have a 1,2Gbit/s bus between
> the PCI controller and the 9.6Gbit/s backplane, seriously limiting their
> value as high-throughput firewalls, even if you try to optimize PCI bus
> utilization (e.g. only one Gbit/s card per PCI bus).
>
> Bye
>
> Volker Tanger
> IT-Security Consulting
>
> --
>
> IBM
> Mittelstand Systeme GmbH
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>
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>
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> http://www.discon.de/
>
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