On Sat, Feb 07, 2015 at 09:33:09PM +0100, Paolo Bonzini wrote:
> > Can remove another 300 cycles from do_div when programming LAPIC
> > tscdeadline timer.
>
> Do you mean using something like lib/reciprocal_div.c?
Yes.
> Good idea,
> though that's not latency, it's just being slow. :)
It adds
On 06/02/2015 21:51, Marcelo Tosatti wrote:
> On Fri, Feb 06, 2015 at 01:16:59PM +0100, Paolo Bonzini wrote:
>> The newly-added tracepoint shows the following results on
>> the tscdeadline_latency test:
>>
>> qemu-kvm-8387 [002] 6425.558974: kvm_vcpu_wakeup: poll time
>> 10407 ns
On Fri, Feb 06, 2015 at 01:16:59PM +0100, Paolo Bonzini wrote:
> The newly-added tracepoint shows the following results on
> the tscdeadline_latency test:
>
> qemu-kvm-8387 [002] 6425.558974: kvm_vcpu_wakeup: poll time
> 10407 ns
> qemu-kvm-8387 [002] 6425.558984: kvm_vcp
The newly-added tracepoint shows the following results on
the tscdeadline_latency test:
qemu-kvm-8387 [002] 6425.558974: kvm_vcpu_wakeup: poll time
10407 ns
qemu-kvm-8387 [002] 6425.558984: kvm_vcpu_wakeup: poll time 0 ns
qemu-kvm-8387 [002] 6425.561242: kv
