From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 2 May 2017 11:20:39 +0200
From: Henning Schild <henning.schild@siemens.com>
Message-ID: <20170502112039.54c4ae04@md1em3qc>
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References: <CADXNiGUww369efOQDe+BvgVyAi3FrakikgTfiPU8Ys7xDpOnnA@mail.gmail.com>
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Subject: Re: [Xenomai] Cpusets and the cpu_affinity test
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To: Jackson Jones <jackson.jones@gmail.com>
Cc: xenomai@xenomai.org

Am Mon, 1 May 2017 14:19:40 -0700
schrieb Jackson Jones <jackson.jones@gmail.com>:

> I am having trouble getting the cpu_affinity test to run. The check
> for CPU restriction always fails. I have tried to remedy this by
> setting the bootargs.
> 
> 1.) I am running an NXP i.MX6 QUAD/DUAL VAR-SOM-MX6 based board
> (Variscite var_som_mx6). The kernel is an 4.1.15 NXT/Variscite kernel
> (with the BSP patched in). I patched in the
> ipipe-core-4.1.15-arm-8.patch.
> 
> 2.) I am running Xenomai 3.0.3
> 
> 3.) The Linux distro is Debian Jessie 8.7 (provided by Variscite and
> Linaro)
> 
> 4.) The gcc version is 4.9.2, the libc versioni is 2.19.
> 
> 5.) My configure options are:
> ./configure \
>     --with-core=cobalt \
>     --enable-smp \
>     --enable-registry \
>     --enable-pshared \
>     --enable-dlopen-libs \
>     --enable-sanity \
>     --disable-tls \
>     --enable-valgrind-client \
>     --disable-assert
> 
> 6.) Here are the uboot parameters (bootargs):
> setenv videoargs 'if hdmidet; then setenv bootargs ${bootargs}
> video=mxcfb0:dev=hdmi,1024x768M@60,if=RGB24; else setenv bootargs
> ${bootargs} video=mxcfb0:dev=ldb,bpp=32; fi; setenv bootargs
> xenomai.supported_cpus=0x0000000f isolcpus=1 ${bootargs} vmalloc=400M
> fbmem=32M fbcon=32M gpumem=32M galcore.contiguousSize=201326592
> galcore.contiguousBase=0x00000000 video=mxcfb1:off video=mxcfb2:off
> video=mxcfb3:off;'
> 
> 7.) I have attached the kernel configuration.
> 
> I noticed that if I leave any cpus out of the supported cpus, the
> kernel will hang (e.g. if I put a 7 instead of F).

If you want to use all cores in Xenomai, that parameter is not required
and probably should not be set. However the kernel should not hang when
you do not include all, but that is probably another issue.

Why did you set "isolcpus=1"?

And please tell us how exactly the test fails and what the output is. I
guess you are talking about smokey cpu_affinity.

testsuite/smokey --run=cpu_affinity --verbose=100

regards,
Henning

> I have read through all the documentation and have not found an
> answer.
> 
> Thanks in advance for any help.
> 
> 
> Sincerely,
> 
> Jackson Jones
> 
> Stellartech Research Corporation
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