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Minor Good News On Coupling Facility Performance Reporting
In recent releases RMF have put the machine serial number into both SMF Type 74 Subtype 4 (Coupling Facility Activity) and SMF Type 70 Subtype 1 (CPU Activity). Actually we get two fields in each case: Plant Number and Sequence Number, which you can put together as eg "51-12345". Soon we'll get another piece of the jigsaw: Partition Number in 74-4. This is a small change but a nice useful one...... [More]
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System z10 CPU Instrumentation
Since I got back off vacation in L'Hérault in late August I've been working on adding z10 support to our CPU analysis code. It's quite a substantial set of changes - and I don't think I'm finished yet . But I'd like to share with you what I've learned so far. But first let's briefly review what's changed with z10. (This is a very brief review and not a tutorial on the subjects mentioned.)... [More]
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Self-Documenting Systems (Actually Coupling Facilities) - One Year On
About a year ago I posted: A Small Step For RMF, A Giant Leap For Self-Documenting Systems . A year on I've encountered some customer data that's made me go "huh?", related to this. In the referenced post I mentioned R744FLPN, the Coupling Facility's LPAR Number. For the first time I've seen data where the match - with SMF 70 Logical Partition Number (in Logical Partition Section) -... [More]
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A Small Step For RMF, A Giant Leap For Self-Documenting Systems
I mentioned APAR OA21140 before - here . It's quite an old APAR and so it will (in all likelihood) be on your systems. I'd like to draw your attention to a subtle 1-byte field in the SMF 74 Subtype 4 (Coupling Facility Activity) record: R744FLPN. It's the partition number for the coupling facility. (If you've seen any one of several of my presentations I'll've talked about this field.) Here's... [More]
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"Channel Z's All Static All Day Forever" - IRD and Hiperdispatch
I've been looking for an excuse to reference the excellent B52's Channel Z ever since we started talking about "z". And this is, I think, a good one. (Notice BTW the URL in the previous paragraph makes it clear SING365.com (should be "SING360" ) is using Domino.) So, back to the matter at hand... A customer I'm working with is using Intelligent Resource Director (IRD)... [More]
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Gameframes
Hmmm: IBM press release on the gameframe . I'd like to see a lot more detail on this before I go "whoopie!" but it does sound like an intriguing idea. It would be the first "specialty" engine to actually feature different hardware. Reminds of me of the 3090 Vector Facility but it's really nothing like it. And at this stage there's nothing about what will actually be shipped. Still, I'm happy to... [More]
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