Re: MAP_SHARED bizarrely slow

[James Cloos]

>>>>> "Andrew" == Andrew Morton <akpm@xxxxxxxx> writes:

JimC> Both took about 11 seconds for the private and around 30 seconds
JimC> for the shared tests.

Andrew> I get the exact opposite, on a P4:

Interesting.  I gave it a try on a couple of my UMLs.  One is on a P4
(possibly xeon; not sure) and the other is on an athlon.  The p4 did
shared about twice as fast as private and the athlon was 50% faster.
(p4 uses uml kernel 2.4.27; athlon 2.6.6; no idea what the hosts run.)

-JimC
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