From: Daniel Lezcano [mailto:daniel.lezcano@linaro.org] 
Sent: Thursday, November 10, 2016 12:34 PM

quoted

quoted

give a correct result without a dmesg log ?

[root@192.168.8.2 /]$ [root@192.168.8.2 /]$ taskset 65536 time sleep 2 
& taskset 131072 time sleep 3

Thanks for providing the numbers.

So there is no weird messages in dmesg ?

Yes, no weird messages, all seem normal.

quoted

real    0m 2.54s
user    0m 0.04s
sys     0m 0.14s
real    0m 3.47s
user    0m 0.00s
sys     0m 0.15s
[1]+  Done                       taskset 65536 time sleep 2

Seem OK to me.

I'm not sure of that.

2.54 instead of 2
3.47 instead of 3

0.02 time drift could be acceptable but 0.54 or 0.47 is too much.

And 0.15 in sys also a big number AFAICT.

Is the system in NO_HZ ?

We are handling system with NOHZ_FULL 
This was run under simulation and result are reasonable (indeed not perfect) AFAICT.

-Noam