From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Pierre Ficheux <pierre.ficheux@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Xenomai on Crusoe TM5900
Date: Fri, 17 Jul 2009 18:14:42 +0200 [thread overview]
Message-ID: <4A60A372.90105@domain.hid> (raw)
In-Reply-To: <4A60A0D7.5020006@domain.hid>
Pierre Ficheux wrote:
> Hi all,
>
> I try to use Xenomai on TM5900 CPU:
>
> Kernel is 2.6.28.9
> Xenomai is 2.4.8
>
> First configuration (CONFIG_HPET_TIMER is not set) gives lots of
> overruns with latency program:
>
> == Sampling period: 100 us
> == Test mode: periodic user-mode task
> == All results in microseconds
> warming up...
> RTT| 00:00:01 (periodic user-mode task, 100 us period, priority 99)
> RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat
> worst
> RTD| 4.493| 12.861| 25.111| 0| 4.493|
> 25.111
> RTD| 9.057| 13.876| 1152.413| 37| 4.493|
> 1152.413
> RTD| 12.180| 13.755| 640.259| 53| 4.493|
> 1152.413
> RTD| 12.285| 13.924| 618.703| 70| 4.493|
> 1152.413
> ...
>
> Please not I use CONFIG_HZ=250 as CONFIG_HZ=1000 freezes at boot time
> system with "clocksource tsc unstable" message.
Ok. Your processor likely halts the tsc when idle, or something. You
should try and see if there is no processor-specific kernel parameter to
prevent this behaviour, or alternatively try passing idle=poll.
You may also have issues with SMIs, see the TROUBLESHOOTING guide.
>
>
> If I set HPET:
>
> CONFIG_HPET_TIMER=y
> CONFIG_HPET_EMULATE_RTC=y
> CONFIG_X86_UP_APIC=y
> CONFIG_X86_UP_IOAPIC=y
> CONFIG_X86_LOCAL_APIC=y
> CONFIG_X86_IO_APIC=y
>
> I have a very strange message when starting latency:
>
> Xenomai: native skin or CONFIG_XENO_OPT_PERVASIVE disabled.
> (modprobe xeno_native?)
>
> Of course native skin is present and CONFIG_XENO_OPT_PERVASIVE enabled
>
> CONFIG_XENO_SKIN_NATIVE=y
> CONFIG_XENO_OPT_PERVASIVE=y
>
> Any idea?
Please show us the full .config.
--
Gilles
prev parent reply other threads:[~2009-07-17 16:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-17 16:03 [Xenomai-help] Xenomai on Crusoe TM5900 Pierre Ficheux
2009-07-17 16:14 ` Gilles Chanteperdrix [this message]
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