>> However this doesn't work on systems w/o a synced TSC, so by simply
> Why not? This shouldn't be performance critical and you can make
> it monotonous with an additional variable + lock if backwards jumps
> should be a problem.
> Also the variations between non synced TSCs should be far below
> any watchdog's radar screen.
Not true. They'll drift further and further apart over time.
Even a 0.01% crystal difference will eventually kill you.
And if that isn't bad enough think about what happens when I run 180 MHz
processors in one node, and 900MHz in another.
You really can't make any assumptions about TSC sync on boxes where
they're not synced.
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This archive was generated by hypermail 2b29 : Fri Feb 07 2003 - 22:00:25 EST