On 28 Aug 2012 06:55:54 -0700, in bit.listserv.ibm-main you wrote: > With the new machine,it seems like there is A LOT to read which is greate! > .. You may find it usefull to check this part of Draft EC12 tech guide > redbook.I think it is nice,because it summaries performance items well ....
I notice that the language most used on the z, COBOL has NO improvements related to the EC12. There are improvements for PL/1 and C/C++. This speaks louder than anything else as to whether IBM thinks COBOL is on its deathbed. Clark Morris > > Regards > Meral > >1.9.7 Main performance improvement drivers with zEC12 > >The zEC12 is designed to deliver new levels of performance and capacity for >large scale >consolidation and growth. The following attributes and design points of the >zEC12 contribute >to overall performance and throughput improvements as compared to the z196. >/Architecture implementation enhancements: > Transactional Execution (TX) designed for z/OS, Java, DB2 and other exploiters > Runtime Instrumentation (RI) provides dynamic and self-tuning online re-compilation >capability for Java workloads > Enhanced DAT-2 for supporting 2 GB large pages for DB2 buffer pools, Java heap size and >other large structures > Software directives implementation to improve hardware performance > Decimal format conversions for COBOL programs. >zEC12 microprocessor design enhancements: > Six processor cores per chip > Enhanced Out Of Order (OOO) execution design > Improved pipeline balance > Enhanced branch prediction latency and instruction fetch throughput > Improvements on execution bandwidth and throughput > New design for Level 2 private cache with separation of cache structures for instructions >and L2 operands > Reduced access latency for most of Level 1 cache misses > Bigger Level 2 cache with shorter latency > Third level on-chip shared cache is doubled > Fourth level book-shared cache is doubled > Hardware and software prefetcher handling improvements > Increased execution/completion throughput > Improve fetch and store conflict scheme > Enhance branch prediction structure and sequential instruction fetching > Millicode performance improvements > Optimized floating-point performance > Faster engine for fixed-point division > New second level branch prediction array > One cryptographic/compression co-processor per core > Cryptography support of UTF8<>UTF16 conversions > Higher clock frequency at 5.5 GHz > IBM CMOS 13S 32nm SOI technology with IBM eDRAM technology. >zEC12 design enhancements: > Increased total number of PUs available on the system, from 96 to 120, and number of >characterizable cores, from 80 to 101 > Hardware System Area increased from 16 GB to 32 GB > Increased default number of SAP processors per book > New CFCC code available for improved performance > Elapsed time improvements when dynamically altering the size of a cache >structure > DB2 conditional write to a group buffer pool (GBP) > Performance improvements for coupling facility cache structures to avoid >flooding the >coupling facility cache with changed data and avoid excessive delays and >backlogs for >cast-out processing > Performance throughput enhancements for parallel cache castout processing by >extending the number of RCC cursors beyond 512 > CF Storage class and castout class contention avoidance by breaking up >individual >storage class and castout class queues to reduce storage class and castout >class latch >contention. >New features available on the zEC12: > Crypto Express4S performance enhancements > Flash Express PCIe cards to handle paging workload spikes and improve performance > > > > >This message and attachments are confidential and intended solely for the >individual(s) stated in this message. If you received this message although >you are not the addressee, you are responsible to keep the message >confidential. The sender has no responsibility for the accuracy or correctness >of the information in the message and its attachments. Our company shall have >no liability for any changes or late receiving, loss of integrity and >confidentiality, viruses and any damages caused in anyway to your computer >system. > >Bu mesaj ve ekleri, mesajda gonderildigi belirtilen kisi/kisilere ozeldir ve >gizlidir. Bu mesajin muhatabi olmamaniza ragmen tarafiniza ulasmis olmasi >halinde mesaj iceriginin gizliligi ve bu gizlilik yukumlulugune uyulmasi >zorunlulugu tarafiniz icin de soz konusudur. Mesaj ve eklerinde yer alan >bilgilerin dogrulugu ve guncelligi konusunda gonderenin ya da sirketimizin >herhangi bir sorumlulugu bulunmamaktadir. Sirketimiz mesajin ve bilgilerinin >size degisiklige ugrayarak veya gec ulasmasindan, butunlugunun ve gizliliginin >korunamamasindan, virus icermesinden ve bilgisayar sisteminize verebilecegi >herhangi bir zarardan sorumlu tutulamaz. > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
