search for: multiple_cpus

Dear everyone, I am trying to run rgenoud on several chips simultaneusly. I used the instructions provided on Jasjeet Sekhon's Homepage (http://sekhon.berkeley.edu/rgenoud/multiple_cpus.html). However, I have the newer version of R (R 2.12) installed - for a 64-bit machine. So, when I tried to install the special version of "snow" from a zip file provided by Jasjeet on his page, R did not allow me to install it (from a zip file) because it was created before R 2.10. Do...

...h only about a 30% decrease in calculation time. The CPUs were about 60% in use (obviously, the code was not written specifically for several cores). (1) I did try to use multiple cores for the rGenoud package (snow package) as mentioned on the excellent website (http://sekhon.berkeley.edu/rgenoud/multiple_cpus.html) but found a rather strange behaviour: The CPU use on the Amazon instances would decrease to about 25% with periodic peaks. At least the first instance/optimization rum took significant longer (several times longer) than without explicitly including multicores in the genoud function. The numbe...