IBM Power 795 (9119-FHB) Technical Overview and Introduction

Readers' comments

Readers' comments (5) 



Posted by Mr. Tom Boucher on 22 October 2012 at 8:34

On page 102, the EN22 and EN23 are FCoE adapters, not RoCE.

Posted by Mr. Scott Vetter on 3 December 2012 at 18:14

Thanks for the catch. I have a bandwidth amount to update and this will go out with that.

Posted by Daniel Ellison on 27 April 2013 at 12:03

Page 20 says

"In standard mode (also known as MaxCore mode), each 8-core SCM operates at 4.0 GHz with 32 MB of L3 cache and can scale up to 256 cores. When operating in TurboCore mode, each 8-core single-chip module (SCM) operates with up to four active cores per SCM at 4.25 GHz and 32 MB of L3 cache, twice the L3 cache per core that is available in MaxCore mode."

32mb L3 cache in MaxCore mode and 32mb L3 cache in TurboCore mode is not twice the L3 cache per core.... please explain.

Posted by Mr. Scott Vetter on 29 April 2013 at 8:09

Daniel, Thanks for your interest. I will get back with an answer shortly.

Posted by Mr. Scott Vetter on 13 May 2013 at 13:04

Daniel, the total amount of cache per SCM doesn't change, but since the TurboCore mode has fewer processors per SCM, they each are able to access more cache per core. Thanks for your interest in Redbooks!


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Publish Date
11 February 2013


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Author(s)

ISBN-10
0738451150

IBM Form Number
REDP-4640-01