| To: | Karsten Desler <kdesler@xxxxxxxxxx> |
|---|---|
| Subject: | Re: _High_ CPU usage while routing (mostly) small UDP packets |
| From: | jamal <hadi@xxxxxxxxxx> |
| Date: | 07 Dec 2004 08:04:33 -0500 |
| Cc: | Robert Olsson <Robert.Olsson@xxxxxxxxxxx>, P@xxxxxxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx |
| In-reply-to: | <20041207125001.GA26644@xxxxxxxxxx> |
| Organization: | jamalopolous |
| References: | <20041206205305.GA11970@xxxxxxxxxx> <20041206134849.498bfc93.davem@xxxxxxxxxxxxx> <20041206224107.GA8529@xxxxxxxxxx> <41B58A58.8010007@xxxxxxxxxxxxxx> <20041207112139.GA3610@xxxxxxxxxx> <16821.42080.932184.167780@xxxxxxxxxxxx> <20041207125001.GA26644@xxxxxxxxxx> |
| Reply-to: | hadi@xxxxxxxxxx |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Tue, 2004-12-07 at 07:50, Karsten Desler wrote: > Currently I'm having problems capturing packets with tcpdump (lots of > "packets dropped by kernel") which indicates to me that there's > genuinely not much (enough) idle time sitting around. > Ah, more hints. So you are not trying to forward - rather just packet capturing? Are you using a tcpdump patched with mmaped packet socket? The 230-240Kpps you are reporting as a capture dont seem as unreasonable as i thought then. Neither would the CPU use. cheers, jamal |
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