Re: enhanced DAT facility

2009-11-01 Thread A. Harry Williams
On Fri, 30 Oct 2009 15:33:09 -0400 Alan Altmark said: >On Friday, 10/30/2009 at 05:14 EDT, "DUBOIS Laurent (EXT DUBOIS)" > wrote: > >> I have a zTPF guy who tells me that z/TPF will support the enhanced DAT >> >> facility soon to improve performance. &g

Re: enhanced DAT facility

2009-10-30 Thread Rob van der Heij
On Fri, Oct 30, 2009 at 10:37 PM, Schuh, Richard wrote: > Chuckie must be in a good mood if he allowed you to give a one-word reply, > especially on a Friday. He's busy for Halloween http://www.youtube.com/watch?v=mH2rd0wPG9A

Re: enhanced DAT facility

2009-10-30 Thread Schuh, Richard
0, 2009 2:34 PM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: enhanced DAT facility > > On Friday, 10/30/2009 at 03:37 EDT, Neale Ferguson > > wrote: > > Can guests use it under z/VM? > > No. > > Alan Altmark > z/VM Development > IBM Endicott >

Re: enhanced DAT facility

2009-10-30 Thread Alan Altmark
On Friday, 10/30/2009 at 03:37 EDT, Neale Ferguson wrote: > Can guests use it under z/VM? No. Alan Altmark z/VM Development IBM Endicott

Re: enhanced DAT facility

2009-10-30 Thread Bill Holder
No, neither guest support nor host exploitation is included in current versions of z/VM. - Bill Holder, z/VM Development, IBM On Fri, 30 Oct 2009 15:36:52 -0400, Neale Ferguson wrote: >Can guests use it under z/VM? > > >On 10/30/09 3:33 PM, "Alan Altmark" wrote: > >> No, you cannot persuade z

Re: enhanced DAT facility

2009-10-30 Thread Neale Ferguson
Can guests use it under z/VM? On 10/30/09 3:33 PM, "Alan Altmark" wrote: > No, you cannot persuade z/VM to use enhanced DAT ("EDAT"). > > Another religious war in the offing. One of the ways EDAT improves > performance is by eliminating page tables (leaving more room in the cache > for Good

Re: enhanced DAT facility

2009-10-30 Thread Alan Altmark
On Friday, 10/30/2009 at 05:14 EDT, "DUBOIS Laurent (EXT DUBOIS)" wrote: > I have a zTPF guy who tells me that z/TPF will support the enhanced DAT > > facility soon to improve performance. > When I checked our CPU facility list > installed, the machine native shows &g

Re: enhanced DAT facility

2009-10-30 Thread Bill Holder
z/VM does not currently support the Enhanced DAT Facility. And it's not quite as simple as "improves performance". There are tradeoffs involved, and it's not exactly a small undertaking. - Bill Holder, z/VM Development, IBM > Hi, > > I have a zTPF guy who tells m

enhanced DAT facility

2009-10-30 Thread DUBOIS Laurent (EXT DUBOIS)
Hi, I have a zTPF guy who tells me that z/TPF will support the enhanced DAT facility soon to improve performance. When I checked our CPU facility list installed, the machine native shows the enhanced DAT facility installed, but z/VM does not. I am wondering if this facility is z/VM generation