Charm++ parallel programming system

["Chao Mei" <chaomei2 AT illinois.edu>]

I just tried compiling charm-6.1.3 on an AMD Opeteron-based machine (2 quad-core chips, 8-cores in total) with "net-linux-x86_64-smp", and it worked. And the particular benchmark kNeighbor also executed without segment violation. Here is what I did:

 

1. Downloaded charm-6.1.3 from http://charm.cs.uiuc.edu/distrib/charm-6.1.3_src.tar.gz

2. After uncompressing the src, I used command "./build charm++ net-linux-x86_64 -j4 smp" to build the "net-linux-x86_64-smp" layer.

3. Went to directory $CHARM/net-linux-x86_64-smp/tests/charm++/kNeighbor, and compiled the program.

4. Executed the program by using the command "./charmrun ++local ./kNeighbor 7 1000 1024 +p7 ++ppn7". In this command, I used "++local" because I only used the single local Opteron-based machine. When using smp layer, please remember to add option "++ppn" which indicates the number of cores per node (i.e., the #cores that share the same memory address space).

 

In your case, I would use "./charmrun ./kNeighbor 15 1000 1024 +p15 ++ppn 15" as the command.

 

Regarding your second error when removing "++local", have you set the ssh keys correctly, and the ".nodelist" for charmrun?

 

BTW, if the NUMA machine is the cluster you referred to the other day, and the total 16 cores consist of a NUMA-SMP machine, then "multicore-linux64" works better.

 

-Chao Mei

From: Christiane Pousa

Sent: Monday, March 15, 2010 1:09 PM

To: Chao Mei

Cc: ppl AT cs.uiuc.edu ; charm AT cs.uiuc.edu ; Jean-François

Subject: Re: Which version should I install?

Charm version: charm-6.1.3 and the command was: ./charmrun  
kNeighbor 15 10 1024 +p16

To better explain what I have done :
First I 
tried to install just smp version on a NUMA machine (AMD opteron with 16 cores). 
But, this resulted in the error I sent in the last email.  The option 
net-linux-x86_64-smp seems not to work in 
AMD64.

After that, I tried net-linux-amd64-smp version and works well if I execute the 
program with this coommand:
./charmrun ++local kNeighbor 15 10 1024 
+p16

If I remove '++local' I get this error: ssh_exchange_identification: 
Connection closed by remote host

Thank you,

On Mon, Mar 15, 2010 at 18:39, Chao Mei <chaomei09 AT gmail.com> wrote:

Which charm version did you use, and what's the exact command do you use to execute the program?

 

According to our auto-build status, the net-linux-x86_64-smp (http://charm.cs.uiuc.edu/autobuild/cur/)  works fine.

 

Regards,

Chao Mei

From: Christiane Pousa

Sent: Monday, March 15, 2010 9:10 AM

To: Chao Mei

Cc: ppl AT cs.uiuc.edu ; charm AT cs.uiuc.edu ; Jean-François

Subject: Re: Which version should I install?

Hi,

I have installed charm++ SMP version, but when I run some examples (kNeighbor, jacobi) I have got the message:
Signal: segmentation violation
Suggestion: Try running with '++debug', or linking with '-memory paranoid'.

In same examples with charm++ net-linux-amd64 installation, I have not get these errors. Would you know why SMP instalation does not work on NUMA machines?

Thank you,

On Mon, Mar 8, 2010 at 08:26, Chao Mei <chaomei09 AT gmail.com> wrote:

Does your machine have multiple multicore-based nodes? If not, you could install the multicore version of charm++, otherwise, a SMP version is usually a better choice.

 

-Chao Mei

From: Christiane Pousa

Sent: Monday, March 08, 2010 1:18 AM

To: ppl AT cs.uiuc.edu ; charm AT cs.uiuc.edu

Cc: Jean-François

Subject: Which version should I install?

Hi,

I have a multicore AMD Opteron machine with NUMA characteristics. I would like to know which option should I use to install charm on this machine,  multicore(single node only), SMP or net-linux-amd64?

Thanks,

--
[]'s
Christiane Pousa Ribeiro

http://pousa.christiane.googlepages.com/
http://www.google.com/profiles/pousa.christiane

"Judge a man by his questions, rather than by his answers"

-- 
  
[]'s
Christiane Pousa Ribeiro

http://pousa.christiane.googlepages.com/
http://www.google.com/profiles/pousa.christiane

"Judge 
  a man by his questions, rather than by his answers" 



-- 
[]'s
Christiane Pousa Ribeiro

http://pousa.christiane.googlepages.com/
http://www.google.com/profiles/pousa.christiane

"Judge 
a man by his questions, rather than by his answers"