RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver

From	Noam Camus <noamca@mellanox.com>
Newsgroups	linux.kernel
Subject	RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver
Date	2016-11-10 14:10 +0100
Message-ID	<sBXh8-6DM-37@gated-at.bofh.it> (permalink)
References	(2 earlier) <syitP-1fZ-19@gated-at.bofh.it> <syp2h-5zh-27@gated-at.bofh.it> <syNxD-4RO-3@gated-at.bofh.it> <sBcrT-8o-11@gated-at.bofh.it> <sBUVX-4sp-19@gated-at.bofh.it>
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>From: Daniel Lezcano [mailto:daniel.lezcano@linaro.org] 
>Sent: Thursday, November 10, 2016 12:34 PM

>>> 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.

>> 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

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Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-10-31 12:00 +0100
  Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 19:00 +0100
    [PATCH 7/9] ARC: breakout timer stuff into a seperate header Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
      Re: [PATCH 7/9] ARC: breakout timer stuff into a seperate header Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:30 +0100
    [PATCH 5/9] ARC: breakout aux handling into a seperate header Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
      RE: [PATCH 5/9] ARC: breakout aux handling into a seperate header Noam Camus <noamca@mellanox.com> - 2016-11-01 10:30 +0100
    [PATCH 3/9] ARC: timer: gfrc: boot print alongside other timers Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
      Re: [PATCH 3/9] ARC: timer: gfrc: boot print alongside other timers Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:20 +0100
        Re: [PATCH 3/9] ARC: timer: gfrc: boot print alongside other timers Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 18:50 +0100
          Re: [PATCH 3/9] ARC: timer: gfrc: boot print alongside other timers Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 19:00 +0100
    [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ... Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
      Re: [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether  hardware exists ... Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:10 +0100
        Re: [PATCH 1/9] ARC: timer: gfrc, rtc: Read BCR to detect whether  hardware exists ... Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 18:50 +0100
    [PATCH 8/9] ARC: timer: rename config options Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
    [PATCH 0/9] Move ARC timer code into drivers/clocksource/ Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
      [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
        Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-01 01:50 +0100
        Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-01 21:50 +0100
          Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-01 22:00 +0100
            Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-02 01:30 +0100
              Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-02 02:10 +0100
                Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 17:50 +0100
                Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:00 +0100
                Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 19:00 +0100
                Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 19:20 +0100
                Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 19:50 +0100
            Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:40 +0100
              Re: [PATCH 9/9] clocksource: import ARC timer driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 19:20 +0100
              Re: [PATCH 9/9] clocksource: import ARC timer driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 20:00 +0100
      [PATCH 4/9] ARC: time: move time_init() out of the driver Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-10-31 23:50 +0100
        Re: [PATCH 4/9] ARC: time: move time_init() out of the driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:20 +0100
      [PATCH 6/9] ARC: move mcip.h into include/soc and adjust the includes Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-01 00:00 +0100
        Re: [PATCH 6/9] ARC: move mcip.h into include/soc and adjust the  includes Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:30 +0100
      [PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs. inline asm Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-01 00:00 +0100
        Re: [PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs.  inline asm Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:10 +0100
          Re: [PATCH 2/9] ARC: timer: rtc: implement read loop in "C" vs.  inline asm Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-11-03 18:50 +0100
      Re: [PATCH 0/9] Move ARC timer code into drivers/clocksource/ Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-03 18:30 +0100
  RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Noam Camus <noamca@mellanox.com> - 2016-11-01 01:40 +0100
    Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-01 21:10 +0100
      RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Noam Camus <noamca@mellanox.com> - 2016-11-08 12:10 +0100
        Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-11-10 11:40 +0100
          RE: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400  driver Noam Camus <noamca@mellanox.com> - 2016-11-10 14:10 +0100

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