From: Philippe Gerum <rpm@xenomai.org>
To: Roderik_Wildenburg@domain.hid
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] do memory functions switch to secondary mode ?
Date: Sat, 15 Jul 2006 03:38:10 +0200 [thread overview]
Message-ID: <1152927490.5027.52.camel@domain.hid> (raw)
In-Reply-To: <5D63919D95F87E4D9D34FF7748CE2C2A3F9354@domain.hid>
On Tue, 2006-07-11 at 14:27 +0200, Roderik_Wildenburg@domain.hid wrote:
> Does any of the memory functions like :
> memcopy,
> memset,
> bzero,
>
> :
> :
>
> cause Xenomai to switch to secondary mode ?
No, unless a page fault is raised as a result of treading on the target
memory.
> I am asking as I have a high priority task, which mesures its
> periodicity (set to 1ms).
> This task is using just rt_-functions and memcpy.
> When in low priority tasks memory intensively is used (memset,
> rt_heap_alloc, rt_heap_create, NFS-transfers in Linux threads), the
> cycle time of the high priority task inreases to nearly twice the time
> it has been set up (2ms++; at least 1 time, as I just measure maxima).
>
> Is this possible, or am I doing something wrong ?
>
Do you observe this weird behaviour at the same time the kernel emits
allocation failure messages?
> Tanks a lot
> Roderik
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
prev parent reply other threads:[~2006-07-15 1:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-11 12:27 [Xenomai-help] do memory functions switch to secondary mode ? Roderik_Wildenburg
2006-07-11 14:55 ` Jan Kiszka
2006-07-15 1:38 ` Philippe Gerum [this message]
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