Re: [WinPcap-users] Latency when using blocking mode

[Loris Degioanni]

Tyr to play with pcap_setmintocopy() to change the amount of buffering in 
the driver. A small value of the size parameter should decrease the latency, 
but will increase CPU usage under low network loads.

Loris

----- Original Message ----- 
From: "Dave Ungerer" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, September 20, 2004 12:34 PM
Subject: [WinPcap-users] Latency when using blocking mode


Hi there
I'm capturing packets in WinXP.
If I don't call pcap_setnonblock to set non-blocking to 1, the latency 
when
using pcap_next_ex is always 40 to 100 ms, even if I set the read timeout 
to
1 ms in pcap_open.

If I do disable blocking mode, the latency is 1 ms or less.
How do I get the latency down when using blocking mode?
All I'm really trying to do is achieve a good balance between throughput
/cpu usage of capture and the latency of capture.
Thanks in advance for any help.
Best Regards
Dave Ungerer

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