From: Philippe Gerum <rpm@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai@xenomai.org, Rudolf Marek <rudolf.marek@domain.hid>,
xenomai-core <xenomai@xenomai.org>
Subject: [Xenomai-core] Re: [Xenomai-help] negative values of latency/klatency
Date: Tue, 28 Feb 2006 16:22:49 +0100 [thread overview]
Message-ID: <44046AC9.2050601@domain.hid> (raw)
In-Reply-To: <44045A6D.7000508@domain.hid>
Jan Kiszka wrote:
> Jan Kiszka wrote:
>
>>Rudolf Marek wrote:
>>
>>>...
>>>RTT| 00:00:01
>>>RTH|----klat min|----klat avg|----klat max| overrun|---klat best|--klat worst
>>>RTD| 4767| 4929| 15191| 0| 4767| 15191
>>>RTD| 4767| 4808| 8282| 0| 4767| 15191
>>>RTD| 4767| 4808| 8080| 0| 4767| 15191
>>>RTD| 4808| 4808| 7838| 0| 4767| 15191
>>>RTD| 4767| 4808| 7272| 0| 4767| 15191
>>>RTT| 00:00:06
>>>RTH|----klat min|----klat avg|----klat max| overrun|---klat best|--klat worst
>>>RTD| 4808| 4808| 7555| 0| 4767| 15191
>>>RTD| 4767| 4808| 7959| 0| 4767| 15191
>>>RTD| 4767| 4808| 7393| 0| 4767| 15191
>>>RTD| 4808| 4808| 7191| 0| 4767| 15191
>>>RTD| 4767| 4808| 7313| 0| 4767| 15191
>>>
>>>Is this a bug or feature please? Can someone throw the light?
>>>Good would be to print the units to the numbers too (ns).
>>>
>>
>>That was likely a layout question of the latency tool's output. We could
>>simply dump something like "All latencies in nanoseconds" during
>>start-up. Would this be more helpful?
>>
>
>
> The output of latency is indeed inconsistent. Histogram and stats are
> printed in microseconds, intermediate and overall latencies go out as
> nanoseconds. Anyone any objections to switch to micros with 3 digits
> after the decimal point? Patch is ready to be applied.
Let's roll.
>
> == Sampling period: 150 us
> == Test mode: in-kernel timer handler
> == All results in microseconds
> warming up...
> RTT| 00:00:01 (in-kernel timer handler, 150 us period)
> RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat
> worst
> RTD| 8.935| 13.824| 39.951| 0| 8.935|
> 39.951
> RTD| 8.998| 14.619| 36.867| 0| 8.935|
> 39.951
> RTD| 8.576| 14.604| 37.417| 0| 8.576|
> 39.951
> RTD| 3.018| 14.623| 40.466| 0| 3.018|
> 40.466
> [grabbed on a low-end board]
>
> Jan
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
prev parent reply other threads:[~2006-02-28 15:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-27 16:12 [Xenomai-help] negative values of latency/klatency Rudolf Marek
2006-02-28 12:33 ` Jan Kiszka
2006-02-28 12:52 ` Philippe Gerum
2006-02-28 13:02 ` Philippe Gerum
2006-02-28 14:13 ` [Xenomai-core] " Jan Kiszka
2006-02-28 15:22 ` Philippe Gerum [this message]
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