[Dnsmasq-discuss] CPU at 100%

[Simon Kelley]

On 18/01/12 12:01, Christopher Moore ( Linux Epos) wrote:
> Hi,
>
> I'm running dnsmasq 2.59 on a few hundred linux servers.
>
> After anything from an hour to a few days dnsmasq will use 100% of the CPU.
>
> Doing an strace on a running process I get:
>
> time(NULL) = 1326874188
> fcntl64(0, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE)
> fcntl64(0, F_SETFL, O_RDWR|O_NONBLOCK|O_LARGEFILE) = 0
> recvmsg(0, 0xbfb3fbb4, MSG_PEEK|MSG_TRUNC) = -1 ENOTSOCK (Socket
> operation on non-socket)
> recvmsg(0, 0xbfb3fbb4, 0) = -1 ENOTSOCK (Socket operation on non-socket)
> fcntl64(0, F_SETFL, O_RDWR|O_LARGEFILE) = 0
> select(6, [0 3 4 5], [], [], NULL) = 1 (in [0])
>
> time(NULL) = 1326874188
> fcntl64(0, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE)
> fcntl64(0, F_SETFL, O_RDWR|O_NONBLOCK|O_LARGEFILE) = 0
> recvmsg(0, 0xbfb3fbb4, MSG_PEEK|MSG_TRUNC) = -1 ENOTSOCK (Socket
> operation on non-socket)
> recvmsg(0, 0xbfb3fbb4, 0) = -1 ENOTSOCK (Socket operation on non-socket)
> fcntl64(0, F_SETFL, O_RDWR|O_LARGEFILE) = 0
> select(6, [0 3 4 5], [], [], NULL) = 1 (in [0])
>


Output from

lsof -c dnsmasq

whilst in this state would be useful too.

Simon.