hi,
so it can use only one core?

Cu respect,
Adrian Rapa
Millennium IT

tel.: 0372-168.638
fax.: 021-569.79.99
e-mail: [email protected]
web: www.mitnet.ro


On 07.01.2011 15:02, Luca Deri wrote:
Adrian
ntop is CPU bound that means that even if you accelerate packet capture, ntop 
performance will not increase much. Please use nprobe are preprocessor of 
packets that are converted to flows and analyzed by ntop

Regards Luca

On Jan 1, 2011, at 6:48 PM, Adrian Rapa wrote:

hi,
i am trying to do a ntop pfring setup.
I compiled pf_ring, e1000e and libpcap drivers from svn.
I compiled ntop with ./configure --with-rrd-home=/opt/rrdtool-1.4.5/ 
--with-pcap-root=/kit/pf_ring/PF_RING/userland/libpcap-1.0.0-ring/ LIBS="-lpcap 
-lpfring -lpthread"
I have eth1 which is a port mirror with about 700Mb of trafic RX+tx.

If i start ntop -i eth1 i have a lot of packet loss. If i use top, i see that a 
single cpu is used to capture packets.
As i know pf_ring should increase the packet capture rate, but it is acting as 
normal linux  pcap.

is it normal for ntop to use a single cpu, or can i do somenthing to use all 8 
CPU?


--
Cu respect,
Adrian Rapa
Millennium IT

tel.: 0372-168.638
fax.: 021-569.79.99
e-mail: [email protected]
web: www.mitnet.ro


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"Debugging is twice as hard as writing the code in the first place. Therefore, 
if you write the code as cleverly as possible, you are, by definition, not smart 
enough to debug it. - Brian W. Kernighan

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