All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Harald Feßl" <harald.fessl@sigmatek.at>
To: jan.kiszka@siemens.com, xenomai@xenomai.org
Subject: Re: [Xenomai] Fwd: Re: Problem that the Linux scheduler is not called for some ms
Date: Thu, 24 Sep 2015 16:46:09 +0200	[thread overview]
Message-ID: <56040CB1.1020806@sigmatek.at> (raw)
In-Reply-To: <56028093.6050805@siemens.com>

Hi Jan

If I activate ftrace, the kernel is crashing while the system is 
booting. I can not see at the moment where the problem is.
Is a ipipe trace also a option for you to get more informations ?
If yes a can trace a good and a bad working cycle.

Harald

Am 23.09.2015 um 12:36 schrieb Jan Kiszka:
> On 2015-09-23 10:51, Harald Feßl wrote:
>> Hi
>>
>> The linux tasks are not blocked (not all).
>> I think the problem is , that the linux scheduler function in the kernel
>> is not called for some ms.
>> I have also traced the calls to the scheduler function
>> "static int __sched __schedule(void)"
>> and sometimes when the decribed problem occur this function is not
>> called while no linux task are running.
> If no task is runnable, there is also no reason to invoke schedule.
>
> Please post a ftrace log of your system, covering both a working and a
> non-working cycle, including cobalt* and at least sched and irq events.
>
> Jan
>



  reply	other threads:[~2015-09-24 14:46 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <5601617F.3080800@sigmatek.at>
2015-09-22 14:13 ` [Xenomai] Problem that the Linux scheduler is not called for some ms Wolfgang Netbal
2015-09-22 18:44   ` Jan Kiszka
     [not found]     ` <560263A0.4080208@sigmatek.at>
2015-09-23  8:51       ` [Xenomai] Fwd: " Harald Feßl
2015-09-23 10:36         ` Jan Kiszka
2015-09-24 14:46           ` Harald Feßl [this message]
2015-09-25  8:44           ` Harald Feßl
2015-09-29 12:38             ` Johann Obermayr
2015-09-29 15:56               ` Philippe Gerum
     [not found]                 ` <561256C6.4070508@sigmatek.at>
     [not found]                   ` <561264DD.2020803@xenomai.org>
2015-10-07  9:01                     ` Johann Obermayr
2015-10-07  9:07                       ` Philippe Gerum
2015-10-07 14:23                         ` Harald Feßl
2015-10-07 15:27                           ` Philippe Gerum
2015-10-08  7:29                             ` Harald Feßl
2015-10-14  7:29                               ` Harald Feßl
2015-10-14  8:15                                 ` Philippe Gerum
2015-10-19  9:37                                   ` Harald Feßl
2015-10-22 13:26                                     ` Harald Feßl
2015-10-23  8:02                                       ` Philippe Gerum

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=56040CB1.1020806@sigmatek.at \
    --to=harald.fessl@sigmatek.at \
    --cc=jan.kiszka@siemens.com \
    --cc=xenomai@xenomai.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.