Re: big rt latencies compared to non rt

[Angelo Dureghello <angelo@xxxxxxxxxxxxxxxx>]

Hi John and Jonathan,

thanks a lot for the help.

On 11/05/21 10:14 PM, John Ogness wrote:
> Hi Angelo,
>
> On 2021-05-11, Angelo Dureghello <angelo@xxxxxxxxxxxxxxxx> wrote:
> > cyclictest --duration=180 -t=1 -m -Sp99 \
> >           -i2000 -h3000 -q > histogram
> >
> > Average is near 16uS but there are some outside
> > values near 40000, as
>
> The first column is the latency in microseconds. The other columns
> (2nd-5th) is the count of times that latency was seen for a CPU.
>
> > 000009 000000    000000    000000    000000
> > 000010 000001    000000    000002    000000
> > 000011 000002    000000    000000    000000
> > 000012 000023    000006    000008    000004
> > 000013 001565    001504    002010    001367
> > 000014 000425    001959    000649    000700
> > 000015 001447    001917    001129    001415
> > 000016 034084    026118    040328    032334
> > 000017 040537    015000    033773    041092  <-----
>
> CPU3 saw a latency of 17us 41092 times.
>
> John Ogness

--
Angelo Dureghello