Re: wild gettimeofday on smp under 2.2.18

[Peter T. Breuer]

"Alan Cox wrote:"
> Doesnt seem very wild to me, but something did go back 3uS which would imply
> the CPU tsc's are not synched. 2.2 doesnt like that, Boot with 'notsc' and
> repeat the experiment

No change with that, as you already know.  But I just noticed that the
ekernel was compiled for i386.  I've recompiled 2.2.18 for i686, and
this comes out of the boot messages:

  checking TSC synchronization across CPUs: 
  BIOS BUG: CPU#0 improperly initialized, has 2045320 usecs TSC skew!  FIXED.
  BIOS BUG: CPU#1 improperly initialized, has -2045320 usecs TSC skew!  FIXED.
  PCI: PCI BIOS revision 2.10 entry at 0xf0730

This is the ASUS BX dual board with onboard scsi.

But the FIXED above doesn't seem to be true. I still get results like
those below from gettimeofday calls every five seconds. Clearly two
mixed sequences ..

  978042124  !
  978042135    *
  978042134  !
  978042139  !
  978042144  !
  978042149  !
  978042158    *
  978042159  !
  978042164  !
  978042169  !
  978042176

Peter