[Difx-users] Problem in performing "startdifx" command on Ubuntu 16.04 LTS

[Lupin Lin]

Dear Chris,

Many thanks for your comments.
I have test the installation of MPI package with some simple programs shown in this link: http://micro.stanford.edu/wiki/Install_FFTW3:
Here are my tests:
+++++++++++++++++++++++++++++++++++++++++++++
lupin at GLTCU:~$ mpic++ -I/use/include simple_mpi_example.c -L/usr/lib/x76_64-linux-gnu/ -lfftw3_mpi -lfftw3 -o simple_mpi_example
simple_mpi_example.c: In function ‘int main(int, char**)’:
simple_mpi_example.c:16:25: warning: format ‘%i’ expects argument of type ‘int’, but argument 2 has type ‘ptrdiff_t {aka long int}’ [-Wformat=]
  printf("%i\n", local_n0);
                         ^
lupin at GLTCU:~$ mpic++ -I/usr/include simple_example.c -L/usr/lib -lfftw3 -o simple_example
lupin at GLTCU:~$ ./simple_mpi_example
10000
finalize
lupin at GLTCU:~$ ./simple_example
power of original data is 32130.000000
power of transform is 32130.000000
++++++++++++++++++++++++++++++++++++++++++++++
It seems the MPI can be performed smoothly, so I do not think the problem was caused by MPI.
In addition, I did not receive any error message when I installed the DiFX.

Sincerely,
--
Lupin Chun-Che Lin
Supporting Scientist of GLT (GreenLand Telescope) project 
in Institute of Astronomy and Astrophysics, Academia Sinica,
14F of Astronomy-Mathematics Building (Rm: 1405), 
National Taiwan University. 
No.1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan.
Tel: +886-2-2366-5464
Fax: +886-2-2367-7849



> Chris Phillips <christo.phillips at gmail.com> 於 2016年11月4日 下午8:35 寫道：
> 
> Hi Lupin,
> 
> I am not sure what the problem might be (sorry!). But from the look of it, I suspect this is a local setup problem, not a DIFX problem specifically. You might want to compile a MPI test program (google for a simple example) and see if you can get anything running).
> 
> Regards
> Chris
> 
> 
> On Fri, Nov 4, 2016 at 7:03 PM, Lupin Lin <lupin at asiaa.sinica.edu.tw <mailto:lupin at asiaa.sinica.edu.tw>> wrote:
> To whom will concern it,
> 
> When I finished the installation of DiFX in a new computer with the OS of Ubuntu 16.04, I tried to test for correlation using the command “startdifx”.
> However, I receive the following error messages.
> 
> lupin at GLTCU:/data2/lupin/g3-7033$ startdifx -n -f g3_7033.input
> --------------------------------------------------------------------------
> While computing bindings, we found no available cpus on
> the following node:
> 
>   Node:  GLTCU
> 
> Please check your allocation.
> ————————————————————————————————————— 
> 
> Here’s the contents of g3_7033.machines,
> GLTCU
> GLTCU
> GLTCU
> GLTCU
> GLTCU
> 
> And here’s the contents of g3_7033.threads,
> NUMBER OF CORES:    1
> 4
> 
> GLTCU has one CPU of 4 cores, and I have checked the /etc/hosts.
> ————————
> 127.0.0.1       localhost
> 127.0.1.1       GLTCU
> 127.0.0.1 localhost.localdomain localhost
> 127.0.1.1 GLTCU.localdomain     GLTCU
> ————————
> 
> Therefore, I have no opinion why the computing server cannot find CPUs.
> Did anyone meet the similar problem? 
> 
> Sincerely,
> --
> Lupin Chun-Che Lin
> Supporting Scientist of GLT (GreenLand Telescope) project 
> in Institute of Astronomy and Astrophysics, Academia Sinica,
> 14F of Astronomy-Mathematics Building (Rm: 1405), 
> National Taiwan University. 
> No.1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan.
> Tel: +886-2-2366-5464 <tel:%2B886-2-2366-5464>
> Fax: +886-2-2367-7849 <tel:%2B886-2-2367-7849>
> 
> 
> 
> 
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