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CPU Measurement Facility (CPUMF) for Linux on zSystems

August 16, 2022 November 24, 2022 / By Eberhard Pasch / Hardware, Hardware, Linux / Leave a Comment

The CPU Measurement Facility (CPUMF) provides hardware data to operating systems running in a LPAR on IBM zSystems. Besides trouble shooting it can also be used for long term analysis.

Preparation

Before you can collect data, you need to allow … Read the rest

z16 front

IBM z16

April 5, 2022 November 3, 2022 / By Eberhard Pasch / Hardware / Leave a Comment

Today April 5th 2022 IBM announced the new generation of mainframe called IBM z16. Planned availability date is May 31, 2022. The system is a significant step forward from z15 with AI and compliance components as well as a restructuring … Read the rest

Linux solution test papers

Solution test publications overview

January 10, 2022 May 21, 2022 / By Eberhard Pasch / Hardware, Hint and Tips, Linux, Software / Leave a Comment

The Linux solution test team has created a good set of papers. This blog entry is the overview. For selected papers I’ll add and link more specialized posts. Latest papers will always been shown at the top.

  • PCIe RoCE Express
… Read the rest
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Red Hat Enterprise Linux (RHEL) 8.5 released

November 9, 2021 January 7, 2022 / By Eberhard Pasch / Linux Distributions, Red Hat / Leave a Comment

On November 9th 2021 Red Hat released RHEL 8.5 the fourth service pack for their leading Linux enterprise version. This is an intermediate release but it has a few interesting features, which may be the reason to upgrade to this … Read the rest

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SUSE Linux Enterprise Server SLES 15 SP3 released

June 21, 2021 January 7, 2022 / By Eberhard Pasch / Linux Distributions, SUSE / Leave a Comment

On June 21st 2021 SUSE announced SLES 15 SP3 the third service pack for SLES 15.  This time no kernel upgrade but still quite a lot of new features for System Z after one year of development:

  • Support for
… Read the rest
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Red Hat Enterprise Linux (RHEL) 8.4 released

May 18, 2021 January 7, 2022 / By Eberhard Pasch / Linux Distributions, Red Hat / Leave a Comment

On May 18th  2021 Red Hat released RHEL 8.4 the fourth service pack for their leading enterprise version. This is a long term support version and therefore a good starting point for new projects as well as an upgrade target … Read the rest

z14 and z15 chip i,age

SMT: What utilization in real?

March 1, 2021 March 1, 2021 / By Eberhard Pasch / Hint and Tips / Leave a Comment

Simultaneous Multithreading (SMT) has been introduced to improve the throughput per core. In system Z if only one thread is running, the performance is very close to this of a single thread environment. In your data center you have most … Read the rest

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Red Hat Enterprise Linux (RHEL) 8.3 released

October 30, 2020 November 17, 2020 / By Eberhard Pasch / Linux Distributions, Red Hat / Leave a Comment

On October 29th, 2020 Red Hat announced RHEL 8.3 the third service pack for their leading enterprise version. As soon as your middleware and application are available for RHEL 8 please plan for migration from older releases. 

The kernel level … Read the rest

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SUSE Linux Enterprise Server 15 SP2 (SLES15 SP2) released

July 22, 2020 January 7, 2022 / By Eberhard Pasch / Linux Distributions, SUSE / Leave a Comment

On June 21st 2020 SUSE announced SLES15 SP2 the second service pack SLES 15.  With it’s kernel upgrade it contains many new features for System Z:

  • z15 support 
    • compiler (-march=z15), binutils, gdb support new instructions
    • full zlib acceleration support 
… Read the rest
z15 T02

z15 T02 / LinuxONE III LT2

June 15, 2020 June 15, 2020 / By Eberhard Pasch / Hardware / Leave a Comment

On April 14th IBM announced the new z15 T02 the successor for the z14 ZR1. At the same time also the LinuxONE III LT2 the successor for the LinuxONE Rockhopper II was announced. Both machines are based on … Read the rest

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Recent Posts

  • CPU Measurement Facility (CPUMF) for Linux on zSystems
  • IBM z16
  • Solution test publications overview
  • Red Hat Enterprise Linux (RHEL) 8.5 released
  • SUSE Linux Enterprise Server SLES 15 SP3 released
  • Red Hat Enterprise Linux (RHEL) 8.4 released
  • SMT: What utilization in real?
  • Red Hat Enterprise Linux (RHEL) 8.3 released
  • SUSE Linux Enterprise Server 15 SP2 (SLES15 SP2) released
  • z15 T02 / LinuxONE III LT2

Most active last month

  1. SUSE Linux Enterprise Server 12 SP5 (SLES12 SP5) released
  2. z/Architecture Principles of Operations
  3. zlib acceleration
  4. z15
  5. SUSE Linux Enterprise Server 15 SP1 (SLES15 SP1) released

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The postings on this site are my own and don’t necessarily represent my employer’s positions, strategies or opinions.

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