On 2018-07-26 09:25:40 [+0200], Ard Biesheuvel wrote:
> Thanks a lot.
>
> So 20 us ~= 20,000 cycles on my 1 GHz Cortex-A53, and if I am
> understanding you correctly, you wouldn't mind the quantum of work to
> be in the order 16,000 cycles or even substantially more?
I have currently that one
On 25 July 2018 at 18:50, bige...@linutronix.de wrote:
> On 2018-07-25 11:54:53 [+0200], Ard Biesheuvel wrote:
>> Indeed. OTOH, if the -rt people (Sebastian?) turn up and say that a
>> 1000 cycle limit to the quantum of work performed with preemption
>> disabled is unreasonably low, we can
On 2018-07-25 11:54:53 [+0200], Ard Biesheuvel wrote:
> Indeed. OTOH, if the -rt people (Sebastian?) turn up and say that a
> 1000 cycle limit to the quantum of work performed with preemption
> disabled is unreasonably low, we can increase the yield block counts
> and approach the optimal numbers
On 25 July 2018 at 11:45, Dave Martin wrote:
> On Wed, Jul 25, 2018 at 10:23:00AM +0100, Ard Biesheuvel wrote:
>> On 25 July 2018 at 11:09, Dave Martin wrote:
>> > On Tue, Jul 24, 2018 at 06:12:20PM +0100, Ard Biesheuvel wrote:
>> >> Vakul reports a considerable performance hit when running the
On Wed, Jul 25, 2018 at 10:23:00AM +0100, Ard Biesheuvel wrote:
> On 25 July 2018 at 11:09, Dave Martin wrote:
> > On Tue, Jul 24, 2018 at 06:12:20PM +0100, Ard Biesheuvel wrote:
> >> Vakul reports a considerable performance hit when running the accelerated
> >> arm64 crypto routines with
On 25 July 2018 at 11:09, Dave Martin wrote:
> On Tue, Jul 24, 2018 at 06:12:20PM +0100, Ard Biesheuvel wrote:
>> Vakul reports a considerable performance hit when running the accelerated
>> arm64 crypto routines with CONFIG_PREEMPT=y configured, now that thay have
>> been updated to take the
On Tue, Jul 24, 2018 at 06:12:20PM +0100, Ard Biesheuvel wrote:
> Vakul reports a considerable performance hit when running the accelerated
> arm64 crypto routines with CONFIG_PREEMPT=y configured, now that thay have
> been updated to take the TIF_NEED_RESCHED flag into account.
>
> The issue
On 2018-07-24 19:12:20 [+0200], Ard Biesheuvel wrote:
> Vakul reports a considerable performance hit when running the accelerated
> arm64 crypto routines with CONFIG_PREEMPT=y configured, now that thay have
> been updated to take the TIF_NEED_RESCHED flag into account.
just in time. I will try to
