Re: Very interesting paper: An Analysis of Linux Scalability to many Cores

Very interesting! Thanks

On Fri, Oct 1, 2010 at 4:05 PM, Andre Oppermann <oppermann_at_networx.ch>wrote:

> Just saw the link to a very interesting paper on SMP scalability.
> A very good read and highly relevant for our efforts as well.  In
> certain areas we may already fare better, in others we still have
> some work to do.
>
> An Analysis of Linux Scalability to many Cores
>
> ABSTRACT
>  This paper analyzes the scalability of seven system applications
>  (Exim, memcached, Apache, PostgreSQL, gmake, Psearchy, and MapReduce)
>  running on Linux on a 48-core computer. Except for gmake, all
>  applications trigger scalability bottlenecks inside a recent Linux
>  kernel. Using mostly standard parallel programming techniques—
>  this paper introduces one new technique, sloppy counters—
>  these bottlenecks can be removed from the kernel or avoided by
>  changing the applications slightly. Modifying the kernel required
>  in total 3002 lines of code changes. A speculative conclusion from
>  this analysis is that there is no scalability reason to give up on
>  traditional operating system organizations just yet.
>
> http://pdos.csail.mit.edu/papers/linux:osdi10.pdf
>
> --
> Andre
>
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-- 
stephano