Re: [Xen-devel] [RFC PATCH v1] Replace tasklets with per-cpu implementation.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.08.14 at 19:58, <konrad.wilk@xxxxxxxxxx> wrote:
> The 'hvm_do_IRQ_dpci' is the on that is most often scheduled
> and run. The performance bottleneck comes from the fact that
> we take the same spinlock three times: tasklet_schedule,
> when we are about to execute the tasklet, and when we are
> done executing the tasklet.

Before starting all the work here, did you investigate alternatives
to this specific use of a tasklet? E.g., it being a softirq one, making
it have its own softirq?

Jan


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