Re: [tcpdump-workers] running tcpdump seems to block disk operations on loaded systems

2011-12-18 Thread Guy Harris
On Dec 18, 2011, at 3:54 AM, Nikola Ciprich wrote: > here's the strace: > 09:48:15.982305 setsockopt(3, SOL_PACKET, PACKET_RX_RING, > "\0\0\2\0\37\0\0\0@\0\1\0\37\0\0\0", 16) = 0 <15.531056> > ^^^ here it hangs > 09:48:32.050796 mmap(NULL, 4063232, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = > 0x

Re: [tcpdump-workers] running tcpdump seems to block disk

2011-12-18 Thread Nikola Ciprich
> ...that the first thing I'd do is run top to see what processes are chewing > up the CPU, and if tcpdump is chewing up a significant amount of CPU time, > possibly also run strace (you say "-i any", so this is presumably Linux, and > your email address further supports that; thus, strace shoul