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

From	Daniel Lezcano <daniel.lezcano@linaro.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 3/3] clocksource: Add clockevent support to NPS400 driver
Date	2016-11-10 11:40 +0100
Message-ID	<sBUVX-4sp-19@gated-at.bofh.it> (permalink)
References	(1 earlier) <sy5dh-16O-49@gated-at.bofh.it> <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>
Organization	linux.* mail to news gateway

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On 08/11/2016 09:30, Noam Camus wrote:
>> From: Daniel Lezcano [mailto:daniel.lezcano@linaro.org] 
>> Sent: Tuesday, November 1, 2016 10:02 PM
> ...
>> Assuming cpu0 and cpu1 are sibling, does
> 
>> taskset 0x1 time sleep 2 & taskset 0x2 time sleep 3
> 
> I will use 16,17 instead of 0,1
>> 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 ?

> 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 ?



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Thread

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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