Re: libpcap & poll()

[Eloy Paris <peloy () chapus net>]

Hi Aaron,

On Thu, Nov 13, 2008 at 02:32:21PM -0800, Aaron Turner wrote:

[...]

> basically:
>
> int keep_processing = 1;
>
> pcap_setnonblock(pcap1, 1, errbuf);
> pcap_setnonblock(pcap2, 1, errbuf);
> do {
>    pcap_dispatch(pcap1, -1, &callback, &keep_processing);
>    pcap_dispatch(pcap2, -1, &callback, &keep_processing);
> } while(keep_processing);

This will definitely yield high CPU utilization

> I would of assumed that using poll() would be more efficient since the
> code effectively blocks until a packet arrives rather then looping
> constantly even when idle.

You're assumption is correct. I think you're on the right path with poll(); just do some troubleshooting to see what's 
causing the high CPU.

Cheers,

Eloy Paris.-
netexpect.org
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