Performance effect of multiple virtual processors

2013-02-15 Thread Keith Gooding
Hi all,   Suppose I have a linux zVM guest with n virtual IFLs running in a z/VM LPAR which has n dedicated IFLs. If the guest is dormant and becomes eligible to run again ( eg I/O completes) does the zVM scheduler wait for all n  real IFLs to be free before dispatching it ?. I thought I saw 

Re: Performance effect of multiple virtual processors

2013-02-15 Thread Mark Post
No, it won't wait.  z/VM will dispatch the guest on a single logical processor if necessary. Keith Gooding kw...@yahoo.co.uk wrote:Hi all,   Suppose I have a linux zVM guest with n virtual IFLs running in a z/VM LPAR which has n dedicated IFLs. If the guest is dormant and becomes eligible to run