I have problems with the time measurement on 21264 Linux systems. I have seen output like: [frohlich@spe85 frohlich]$ date ; time 1>/dev/null ./tstl95 ; date Fri Aug 27 04:49:35 EDT 1999 275.38user 0.00system 0:34.65elapsed 794%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (92major+372minor)pagefaults 0swaps Fri Aug 27 04:50:10 EDT 1999 Where you can see that the elapsed CPU-time is about eight times longer then the real time! It seems to me that there is an inconsistency between the system headers which define the number of clock ticks to 1024 and the return value of times (libc-system call) which seems to return eight times more ticks a second ... I did some small timings with this machine and was very surprised that the linux system has about eight times smaller MFlop rates (with the same assembly code) then the True64 system!