I've updated blktrace w/ the following commits. It has enabled me to handle a moderate load on a 32-way ia64 box w/ 88 disks being used. (The load is to build an Oracle database w/ 5000 warehouses onto the volume constructed from those 88 disks.) I used both local & networked modes, and had _zero_ drops over a 400 second period. (The load was generating about 44,500 traces per second.)