Dear Paolo Thank you very much for your advice . I still have some questions that need your help . I don't know why only display 8 CPUs while I use 2 nodes (16 CPUs) ? Untill now the job only has 2 iterations form 2:00 PM today ,it is so slowly . How can I solve this problem ? Best regards On Sep 7, 2009, at 8:55 , wangqj1 wrote:
> I now use 16 CPUs(2 nodes) to run the task ,the job runs but very > slower than use 4 CPUs in my personal computer ,I use top to look > CPU information,it as following: > > Tasks: 176 total, 1 running, 175 sleeping, 0 stopped, 0 zombie > Cpu0 : 0.4%us, 0.4%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu6 : 0.7%us, 0.0%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0% > si, 0.0%st > Mem: 8048812k total, 5537848k used, 2510964k free, 315448k > buffers > Swap: 4192956k total, 0k used, 4192956k free, 5022856k > cached > > Why only display 8 CPUs information because only the CPUs of one node are shown > and the usage of CPU is so small ? because the code is not running. Maybe it is just waiting for input -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20090907/c60520ec/attachment.htm