[Users] Problems running BBH example

[Roland Haas]

Hello Krishna,

Turns out I am getting a similar issue myself now when running on my
(old, well tested) laptop:

cactus_sim: configs/sim/build/SystemTopology/system_topology.cc:471: void {anonymous}::set_bindings(hwloc_topology_t, const mpi_host_mapping_t&): Assertion `num_pus % num_cores == 0' failed.

so something may have changed in hwloc even for standard machines. I
will see if this is something that can be fixed in code.

Yours,
Roland

> Hello Krishna,
> 
> The abort is triggered by the SystemTopology / HWLOC thorns having
> encountered a processor / core / PU combination that they did not
> expect. Is there anything in the stdout file?
> 
> I am not quite familiar enough with hwloc in particular to really make
> a good suggestion.
> 
> You can certainly try and remove 
> 
> SystemTopology
> 
> and 
> 
> hwloc 
> 
> from your parameter file's ActiveThorn line(s). This will avoid the
> issue but may, depending on your cluster (mis-)configuration, yield
> non-ideal speeds (basically you must ensure manually that there is at
> most one thread per CPU core). Carpet has an option
> 
> Carpet::set_cpu_affinity = "yes"
> 
> that probably gives you almost all you would get from SystemTopology so
> you can try that one instead.
> 
> Can you provide details on the cluster / CPU of the cluster?
> 
> Yours,
> Roland
> 
> > Hello,
> > 
> > I've downloaded and configured the Einstein Toolkit on my desktop,
> > but I'm having an issue when I try to run the BBH example provided
> > here
> > <https://urldefense.com/v3/__https://einsteintoolkit.org/gallery/bbh/index.html__;!!DZ3fjg!-XFQ4fosXbEkKSRrQrEdwsGzgJCJQRkES951alRCNP9y0etbO9hlBmHws6LOl8wf57_50ErWvtxsYc05tAcu$  
> > > and the BNS simulation from here
> > > <https://urldefense.com/v3/__https://einsteintoolkit.org/gallery/bns/index.html__;!!DZ3fjg!-XFQ4fosXbEkKSRrQrEdwsGzgJCJQRkES951alRCNP9y0etbO9hlBmHws6LOl8wf57_50ErWvtxsYWDkk_Pq$  
> > > >. The job finishes in an instant, producing the attached error
> > > >file. (I'm using the  
> > command "simfactory/bin/sim create-submit GW150914_28 --define N 28
> > --parfile par/GW150914/GW150914.rpar --procs 24 --walltime 24:00:00")
> > 
> > There seems to be an issue with the 'num_pus' to 'num_cores' ratio in
> > the "system_topology.cc" file, but the error oddly persists even when
> > I manually equate them, or cut out line 471 altogether. This error
> > does not appear when I run the tov_ET example or the HelloWorld one.
> > I'm also able to run this mini BNS tutorial
> > <https://urldefense.com/v3/__https://www.youtube.com/watch?v=3euS5yMBFmI__;!!DZ3fjg!-XFQ4fosXbEkKSRrQrEdwsGzgJCJQRkES951alRCNP9y0etbO9hlBmHws6LOl8wf57_50ErWvtxsYZtrb0UG$  
> > > without any issues, so I'm a bit baffled. I've attached my .ini
> > > file and the .cc file along with the error file in case it helps.  
> > Please take a look and let me know if I'm missing something obvious.
> > 
> > PS: My PC has 128GB of memory, a 13900K(24C/32T) processor and 1TB of
> > storage.
> > 
> > Regards,
> > Praveer  
> 
> 
> 



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