Hi, I've posted the results of Benno's latency tests applied to 2.2.17pre10-ben2 on LinuxPPC. http://www.drfruitcake.com/linux/linuxppc.html No big surprises - although the PPC /proc fs seems to be a little slower than the x86 one... Working on 2.4.0-test4 & thence to Andrew's patches on LinuxPPC... ciao, Iain.