Re: Preemptable Ticket Spinlock

[Peter Zijlstra]

On Mon, 2013-04-22 at 16:49 -0400, Rik van Riel wrote:
> Given the fairly high cost of rescheduling a VCPU (which is likely
> to include an IPI), versus the short hold time of most spinlocks,
> I have the strong suspicion that your approach would win.

  https://lkml.org/lkml/2012/5/2/101

If you schedule too often your SPIN_THRESHOLD is far too low.

Anyway.. performance can't be that bad, otherwise Jeremey would have
spend as much time on it as he did.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/