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SubjectRe: hackbench [pthread mode] regression with 2.6.29-rc3
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On Mon, 2009-02-02 at 17:49 +0000, Bryon Roche wrote:

don't drop CCs

> On Mon, 02 Feb 2009 09:53:38 +0100, Peter Zijlstra wrote:
>
> > On Mon, 2009-02-02 at 09:12 +0800, Zhang, Yanmin wrote:
> >
> > I would rather go back to the old model where we iterate all threads,
> > and find a way to not make programs with too many threads for their own
> > good lock up the kernel, but instead get poor service.
>
> Now, there's an interesting question, what is the definition of too many
> threads for a program's own good? When evaluating this, please assume
> that you
> do actually have enough RAM to keep thread stacks/other userspace
> threading
> resources in-core.

In my book a program has too many threads when it outnumbers the number
of cpus available to it by an order of so.





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