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I have an Ubuntu server that is running as a router. The internet will be really slow a lot of times so I checked the ping to the router and it will go up to 1400 at some points. I have top, iftop and a window pinging the router and when the ping is high a process that is called ksoftirq is using most or all of the CPU power. Could this just be that the CPU is too weak? It is only an atom processor.

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My guess your latency really is that high. I would kill the ksoftirq process and see if the ping remains high when your internet experiences high latency. –  Ramhound Jun 11 '12 at 18:07
    
What does your network look like? How many other devices are there? –  jmreicha Jun 11 '12 at 21:07
    
i have about 25 computers on the network with a bunch of printers. The biggest task that the server has to do is the vpn. There are up wards of 30 or more people getting on the vpn as well. I did some research and ksoftirq is a processor control is used when there are too many irqs. [link]linuxquestions.org/questions/linux-general-1/ksoftirqd-80255/… –  monkthemighty Jun 11 '12 at 21:16
    
I have been looking at the network traffic with tshark on the router and i find when the network is slow i have a lot of TCP retransmissions and TCP Dup ACK with wireshark. What would cause this? –  monkthemighty Jul 9 '12 at 19:08

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