[Winpcap-users] Statistical mode help

[Chris Morgan]

It may be overhead in .net, it may also be the usage of the library.
I'm the current maintainer/author of sharppcap,
http://sharppcap.sf.net.

Pro2c, what kind of a timeout are you setting? If you profile are you
ending up spending a lot of time looping, calling pcap_dispatch()? It
may be that short timeouts are causing excessive polling and the large
number of adapters means a large number of threads spinning.

If you can get some profile data we can look at what might be causing
the slow down. Other testing has shown that sharppcap can handle
megabytes a second of data without dropping any packets and with low
CPU usage but any issues we can fix we will.

Chris



On Monday, April 12, 2010, Gianluca Varenni
<gianluca.varenni at cacetech.com> wrote:
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> The reason is probably in the .NET wrapper itself, then.
> Opening around 100 pcap instances is something that I've never tried, but
> it might definitely impact the overall system performance.
> If you have written the .NET wrapper yourself, I would
> look into optimizing its code.
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> Have a nice day
> GV
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> From: pro2c <pro2c at litrca.com>
> Sent: Monday, April 12, 2010 12:40 PM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] Statistical mode help
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> I'm doing this in
> VB.NET 2005 (.NET 2.0) and with 1,5Mbyte/sec (~3000 packets/sec)  the cpu
> load is very high.
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> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On
> Behalf Of Gianluca Varenni
> Sent: Monday, April 12, 2010 9:31
> PM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] Statistical
> mode help
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> Then you should definitely be able
> to process that amount of packets with a simple user mode application that sorts
> the packets by TCP port.
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> Have a nice
> day
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> GV
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> From: pro2c
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> Sent: Monday,
> April 12, 2010 12:15 PM
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> To: winpcap-users at winpcap.org
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> Subject: Re:
> [Winpcap-users] Statistical mode
> help
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> Not much. Traffic of an
> average computer... about 15Mbit down and 15 up
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> From:
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