(j3.2006) (SC22WG5.3706) [ukfortran] Atomic stuff

N.M. Maclaren nmm1
Wed Dec 3 04:57:59 EST 2008


Sorry.  I mangled this.

>Secondly, and more seriously, atomic accesses will need some sort of an
>inter-image handshake on most systems - even most SMP systems often need
>extra instructions to synchronise the memory subsystem.

What I should have said is that most SMP systems impose constraints on the
instructions used, and some need extra instructions.


Regards,
Nick Maclaren,
University of Cambridge Computing Service,
New Museums Site, Pembroke Street, Cambridge CB2 3QH, England.
Email:  nmm1 at cam.ac.uk
Tel.:  +44 1223 334761    Fax:  +44 1223 334679




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