From: Jan Kiszka <jan.kiszka@domain.hid>
To: CAMUS Benoit <benoit.camus@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Latencies while ethernet access
Date: Mon, 14 May 2007 18:03:05 +0200 [thread overview]
Message-ID: <46488839.4060801@domain.hid> (raw)
In-Reply-To: <464839C8.8060304@domain.hid>
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Jan Kiszka wrote:
> Let us get the tracer right.
> ...
And here is the issue already when having a second look:
> / # cat /proc/ipipe/trace/frozen
> I-pipe frozen back-tracing service on 2.6.19.2/ipipe-1.6-04
> ------------------------------------------------------------
> Freeze: 9187269471 cycles, Trace Points: 30 (+10)
> Calibrated minimum trace-point overhead: 3.000 us
>
> +----- Hard IRQs ('|': locked)
> |+---- <unused>
> ||+--- Xenomai
> |||+-- IShield
> ||||+- Linux ('*': domain stalled, '+': current, '#': current+stalled)
> ||||| +---------- Delay flag ('+': > 1 us, '!': > 10 us)
> ||||| | +- NMI noise ('N')
> ||||| | |
> Type User Val. Time Delay Function (Parent)
> :| # begin 0x80000001 -190+ 4.250N __ipipe_mach_get_tsc+0x48 (xntimer_do_tick_aperiodic+0x40)
__ipipe_mach_get_tsc() must never pop up in trace, it has to be marked
"notrace". I guess you ported that service for your board? Please fix
and retry the test.
Jan
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next prev parent reply other threads:[~2007-05-14 16:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-04 8:40 [Xenomai-help] Latencies while ethernet access CAMUS Benoit
2007-05-04 10:18 ` Gilles Chanteperdrix
2007-05-04 16:24 ` Jan Kiszka
2007-05-14 10:09 ` CAMUS Benoit
2007-05-14 10:28 ` Jan Kiszka
2007-05-14 16:03 ` Jan Kiszka [this message]
2007-05-14 16:12 ` Gilles Chanteperdrix
2007-05-04 10:26 ` Gilles Chanteperdrix
[not found] ` <1178287470.22169.9.camel@domain.hid>
2007-05-04 16:06 ` Gilles Chanteperdrix
2007-05-04 16:12 ` Jan Kiszka
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