I did provide the execution times in my first email. I have copied it once more for quick reference,
no parallelization : 7 hrs and 58 mins -parallel (coarse parallelization) : 4 hrs and 39 mins -parallel -openmp 8 (fine parallelization) : 4 hrs and 34 mins -parallel -openmp 14 (fine parallelization ) : 4 hrs and 37 mins
I have attached the logs to this email. The naming convention is as follows,
serial_recon-all.log : serial execution with no parallelization parallel_recon-all.log : parallelization using -parallel openmp8_recon-all.log : parallelization using -parallel -openmp 8 openmp14_recon-all.log : parallelization using -parallel -openmp 14
I'll rerun this with* -time* later and see what I get. It is gonna take some time to get those logs.
Thanks, Tyson
On Mon, Feb 13, 2017 at 3:19 PM, Douglas N Greve greve@nmr.mgh.harvard.edu wrote:
What are your execution times? Can you send the recon-all files for your parallel and non-parallel runs? If you run it with -time, then lots of information will be printed to the log for each command. This can be helpful for debugging these types of things.
On 02/13/2017 05:13 PM, Francis Tyson Thomas wrote:
Hi,
I have run recon-all with both -parallel enabled (including different openmp threads) and disabled and I'm not able to get processing times same as the information provided in recon-all help. The CPU used is *Dual Intel **Xeon E5-2623 v3* paired with 32GB DDR4 RAM. Is the configuration presented in recon-all help a dual cpu configuration?
Following are the runtimes I have obtained,
no parallelization : 7 hrs and 58 mins -parallel (coarse parallelization) : 4 hrs and 39 mins -parallel (fine parallelization; -openmp 8) : 4 hrs and 34 mins -parallel (fine parallelization; -openmp 14) : 4 hrs and 37 mins
Somehow varying the number of threads is having no effect in the execution time of recon-all as can been seen from the processing times. If you can explain what could be possibly going wrong here, it will help me in speeding it up further.
Thanks, Tyson
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