cache misses in gcc 3.3

[Mike Stump]

On Thursday, February 13, 2003, at 03:13 PM, Andi Kleen wrote:
> The TSCs are often turned off on large multiprocessor x86 SMP systems,
> because they can go out of sync or the CPUs are deliberately clocked
> at slightly different frequencies to make EMP shielding easier. So you
> cannot rely on RDTSC working or giving meaningful answers.

A feature need not be present on all systems to use on one system.  It 
is ok if one system is better than another.