---------- Debut du message initial -----------
De : [EMAIL PROTECTED]
A : "xenomai-core" xenomai-core@gna.org,"Gilles
Chanteperdrix" [EMAIL PROTECTED]
Copies :
Date : Mon, 18 Sep 2006 11:30:45 +0200
Objet : rare brokenness in latency output - FPU bug!
> Gilles, what info do you need? It's all the latest on x86 here:
> 2.6.17.13 (.config attached), ipipe-1.4, SVN #1646, gcc4.1.0.
It would be interesting if you could:
- try reverting the last FPU changes
- try to narrow down the issue by reducing the number of
threads created
by switchtest (for example, try keeping only the threads whose
switch
fails)
- try dumping the FPU context before the first fp_regs_set,
chances are that the FPU context is already clobbered before
the first fp_regs_set;
when the FPU context is already clobbered, running fp_regs_set
set the
value of the already set registers to qnan, and fp_regs_check
returns
INT_MAX when the register is set to qnan. I will send tomorrow
the
header I use for converting FPU contexts into human readable form.
--
Gilles Chanteperdrix
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