The z10 BC with its single drawer and L2 will get minimal benefit, if any, from HiperDispatch. z10 EC with more books is different of course. It is turned off by default because many mainframe customer don't like changes without their control.
Marian Gasparovic IBM Slovakia On Mon, Dec 8, 2008 at 5:16 PM, Edward Jaffe <[EMAIL PROTECTED]> wrote: > John Kim wrote: >> >> Ed, >> >> I wonder have you turned on 'HIPERDISPATCH=YES' and what the performance >> looks like with this option? >> > > Funny you mention that. Yesterday, I logged on and noticed the following: > > IEAVEH071E HiperDispatch is expected to be enabled but it is disabled > > So, I added HIPERDISPATCH=YES to IEAOPTxx. Once I issued T OPT=xx, the > system(s) responded with: > > N 0040000 MVSA0 08342 15:29:07.45 00000090 IRA860I > HIPERDISPATCH MODE IS NOW ACTIVE > > Book affinity is obviously not important for a single-book machines. Of > course, so-called "short" CPs can exist on most n-way machines. Ours is only > a 4-way. > > We'll try some empirical testing over the next few weeks to see if we notice > any change with HiperDispatch enabled or disabled. > >> We are also going to have a z10-BC soon, but haven't decided yet to turn >> on. Because lots of pros and cons out there. We have 3 LPARs; one >> production >> and two tiny tests. >> > > What kind of cons? Due to implementation "bugs" that have been found? Or > something more fundamental? > > -- > Edward E Jaffe > Phoenix Software International, Inc > 5200 W Century Blvd, Suite 800 > Los Angeles, CA 90045 > 310-338-0400 x318 > [EMAIL PROTECTED] > http://www.phoenixsoftware.com/ > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
