About Amdahl's law 1 ...

From	aminer <aminer@toto.net>
Newsgroups	comp.programming.threads, comp.programming
Subject	About Amdahl's law 1 ...
Date	2013-10-10 13:08 -0700
Organization	albasani.net
Message-ID	<l36mub$7to$1@news.albasani.net> (permalink)

Cross-posted to 2 groups.

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Hello,

But how can we use the Amdahl's law to predict scalability ?

You can not use the Amdahl's to predict the exact scalability,
i think , and i have explained it to you that the Amdahl's laws
in parallel computing gives you the scalability in the worst case 
contention scenario , so the Amdahl's calculation in parallel computing 
looks like the calculation of  the worst case complexity in computer 
science, so it can help to give the scalability
of the worst case contention scenario, so that help also
to predict worst case scalability, and if the serial part have not
a constant running time and the parallel part have not a constant 
runnning time you can try to find and choose a maximum bound of
the time to run the serial part and a maximum bound of the time to run 
the parallel part
and do the Amdahl's calculation and this will give you the scalability
for the worst case contention scenario, so the scalability will be equal
or greater than the scalability that you will find with the Amdahl's 
equation.



Thank you,
Amine Moulay Ramdne.

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About Amdahl's law 1 ... aminer <aminer@toto.net> - 2013-10-10 13:08 -0700
  Re: About Amdahl's law 1 ... aminer <aminer@toto.net> - 2013-10-10 13:57 -0700
  Re: About Amdahl's law 1 ... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-10-10 19:14 +0100
    Re: About Amdahl's law 1 ... aminer <aminer@toto.net> - 2013-10-10 14:45 -0700
      Re: About Amdahl's law 1 ... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-10-10 20:56 +0100
  Re: About Amdahl's law 1 ... aminer <aminer@toto.net> - 2013-10-10 14:30 -0700
    Re: About Amdahl's law 1 ... Robert Wessel <robertwessel2@yahoo.com> - 2013-10-10 23:12 -0500

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