| From: | Craig Dooley <craig@xxxxxxxxxx> |
| Date: | Fri, 7 Nov 2003 08:17:30 -0500 |
> (2) The AMD's syscall overhead is very low compared to the P4. > I ran the 'sc1' test in /usr/src/test/sysperf. The AMD box > comes back at 242nS/loop while the P4 takes 1300nS/loop and > the DELL box (LEAF/SMP) takes 617nS/loop. When we do a port, you can use their new syscall/sysret instructions and it cuts syscall overhead to 1/4 what it is by using software ints. This sounds real exciting for moving parts out of the kernel. -- Craig Dooley craig@xxxxxxxxxx
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