SMP kernel test on Freebsd7.0-BETA4 inside VMWARE: Good results!
bug at camisano.net
Thu Dec 20 04:15:16 PST 2007
I'm writing this to the list to let you know about some tests on SMP
kernel of 7.0:
i'm testing both FreeBSD 7.0-BETA4 and FreeBSD6.3 on VMWARE ESX Server
3.5, using 2 virtual cpu (SMP Kernel).
On freebsd 6.2 and FreeBSD6.3 in ESX Server, SMP kernel is very unstable
and many processes (like compiling something from source or installing
from the ports) will end with segmentation fault. Also, the VM won't
survive a buildworld (the process just freezes).
I've noticed that the problem is no longer present in FreeBSD7.0-BETA4:
the VM i'm testing is up since 2 days and survived several buildworlds
and installation from the ports (SMP kernel with 2 processors, APIC
enabled). Also the clock derive problem is no longer present: while in
freebsd6.2 the clock was loosing 5 seconds per day, on freebsd 7 it is
loosing only 0.9 seconds per day. Looks promising.
I guess this is due to several rewrites of SMP in freebsd7 kernel.
Anyone can confirm these results?
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