On Fri, 3 Sep 2010 16:47:20 -0600, Steve Comstock wrote:
>http://www-01.ibm.com/support/docview.wss?uid=isg2b9de5f05a9d57819852571c500428f9a
>
In which I read:
In a multiprocessing configuration, a single TOD clock is
shared by all CPUs. Each CPU has its own clock comparator,
CPU timer, and TOD programma- ble register.
I thought I was told in the past that each CPU had its own TOD clock,
for fault tolerance. Was I misinformed, or did IBM decide subsequently
that the complexity of synchronizing several dozen clocks outweighs
the risk of a single point of failure?
-- gil
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