On Friday, 04/03/2009 at 03:55 EDT, Dave Jones <d...@vsoft-software.com> wrote: > Well, since it's just a move of data from one address space to another, > I would suspect (but I have no numbers to back this up) that the > overhead would be "minimal".
Since it is a DIAGNOSE, you will automatically be dumped out of SIE. You may be able to infer some performance effects by looking at the Performance Reports from when we added ESA/XC architecture, some 17 years ago, as this is how non-XC mode CMS virtual machine access file data in an SFS dircontrol dataspace. Alan Altmark z/VM Development IBM Endicott
