[Winpcap-users] pcap_sendqueue_transmit() has 128MB limit?

Gianluca Varenni gianluca.varenni at cacetech.com
Mon Apr 27 16:02:06 PDT 2009

I would just use a 2-3 queues and not much more than that.


----- Original Message ----- 
From: "Janne Heikkinen" <janne.m.heikkinen at helsinki.fi>
To: <winpcap-users at winpcap.org>
Sent: Saturday, April 25, 2009 5:31 AM
Subject: Re: [Winpcap-users] pcap_sendqueue_transmit() has 128MB limit?

> Lainaus "Gianluca Varenni" <gianluca.varenni at cacetech.com>:
>> Even if you need to transmit at gigabit rates, I wouldn't use a queue of
>> more than 1-2 MB. Using large sendqueue reduces the number of system 
>> calls,
>> but it gives a hard time to the I/O manager because that large chunk of
>> virtual address space needs to be paged in and locked into memory when 
>> the
>> driver needs to access it. This is extremely time consuming when you use
>> large buffers.
> So if I would use 1000 1MB send queues there wouldn't be much delay
> between different queues?
> - Janne
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