Re: workqueue thing

Ingo Molnar
2009-12-23T07:54:09Z

* Jeff Garzik <jeff@garzik.org> wrote:

> On 12/23/2009 01:02 AM, Ingo Molnar wrote:
> >One key thing i havent seen in this discussion are actual measurements. I
> >think a lot could be decided by simply testing this patch-set, by looking at
> >the hard numbers: how much faster (or slower) did a particular key workload
> >get before/after these patches.
>
> We are dealing with situations where drivers are using workqueues to
> provide a sleep-able context, and trying to solve problems related
> to that.
>
> "faster or slower?" is not very relevant for such cases.

Claims to performance were made though, so it's a valid question.

But it's not the only effect, which is why i continued my email with the issue
you raised:

> > Likewise, if there's a reduction in complexity, that is a tangible metric
> > as well: lets do a few conversions as part of the patch-set and see how
> > much simpler things have become as a result of it.
> >
> > We really are not forced to the space of Gedankenexperiments here.

Thanks,

Ingo