[Pw_forum] pw.x running but nothing happens

[Paolo Giannozzi]

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.

---
Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222