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To: Tenchusatsu who wrote (142318)8/28/2001 6:11:48 PM
From: Saturn V  Read Replies (2) of 186894
 
Ref < Of course, the real trouble is debugging the processor design. Two simultaneously running threads can potentially increase the validation space by an exponential factor. >

Touche !

You have the exact same problem at the software level. Multiply threaded software is a pain to debug, because the difference in the relative timing of the the two threads can dramatically increase the ways in which failures can happen.

It is not uncommon for bugs in multiply threaded applications to surface years after the code was written. They only show up at certain processor speeds and timing conditions.

Multiply threaded software is easy to write, but a pain to validate. The same will also hold for hardware, and it creates the possibility of a another Pentium FDIV problem.
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