Hello Barry, Thanks for offering to look at this. I configured a different version that does not have the debugger and the results are a lot faster but the efficiency is still similar. Below you'll see the results. n Tp Efficiency ------------------------------------- 1 162 1 2 110 0.74 4 47 0.86 8 24 0.84 16 12 0.84 32 6 0.84 I'm also including the output of the log_summary for n =1 and 2. As I said before, this is an SMP machine so I would expect it to be better than the typical cluster. That being said I am still learning how this works. I am very happy that I managed to get some encouraging results in a day. Cheers, Francis On 2012-02-24, at 9:08 PM, Jed Brown wrote:
On Fri, Feb 24, 2012 at 14:43, Francis Poulin <[email protected]> wrote: It seems to scale beautifully starting at 2 but there is a big drop from 1 to 2. I suspect there's a very good reason for this, I just don't know what.
Can you send the full output? The smoother is slightly different, so the number of iterations could be different by 1 (for example). The -log_summary part of the output will show us where the time is being spent, so we'll be able to say what did not scale well between 1 and 2 procs.