Is it possible to know where is the "deadlock"

Hi all,

   I have a serious problem with a server. This server holds severals
DB, the problem is thet the CPU's spend most of the time waiting:

Cpu0: 4.0% us, 2.3% sy, 0.0% ni, 61.5% id, 32.1% wa, 0.0% hi, 0.0% si
Cpu1: 2.3% us, 0.3% sy, 0.0% ni, 84.1% id, 13.3% wa, 0.0% hi, 0.0% si
Cpu2: 1.3% us, 0.3% sy, 0.0% ni, 68.6% id, 29.8% wa, 0.0% hi, 0.0% si
Cpu3: 4.6% us, 3.3% sy, 0.0% ni,  2.6% id, 88.4% wa, 0.3% hi, 0.7% si

     The iostat -c says about 8% of time waiting for IO. I'm afraid this
is due to locks between concurrent queries, is there anyway to have more
info about?

Thanks all
--
Arnau