Re: zLinux guest multiprocessors

2012-08-21 Thread Lu GL Gao
>Yes, it is the application. If it doesn't have highly parallel >multi-threading such that it can keep two CPUs working, then the guest >ends up doing extra work to deal with two processors without any benefit. Hello Alan, Thanks a lot!! We can control linux's virtual processor to horizontal an

Re: zLinux guest multiprocessors

2012-08-21 Thread Alan Altmark
On Tuesday, 08/21/2012 at 11:08 EDT, Lu GL Gao wrote: > Based on my understanding, machine guests such as linux on z/VM can get cpu > resource by their SHARE value. > For example, LINUXA system has SHARE RELATIVE 100. LINUXB system also has > SHARE RELATIVE 100. So LINUXA and LINUXB both has 50% o

zLinux guest multiprocessors

2012-08-21 Thread Lu GL Gao
Based on my understanding, machine guests such as linux on z/VM can get cpu resource by their SHARE value. For example, LINUXA system has SHARE RELATIVE 100. LINUXB system also has SHARE RELATIVE 100. So LINUXA and LINUXB both has 50% of real physical processor resource. If LINUXA has 2 virtual pr