Section 2 – AIX Multiuser Performance (rPerf, POWER8 and up). CPW results of IBM Power Systems servers running the IBM i operating. rPerf is a computer benchmark that evaluates the relative OLTP performance of servers based on IBM POWER microprocessors. It is published by IBM and. Section 2a – AIX Multiuser Performance (rPerf, SPEC CPU, . All performance measurements for the IBM Power™ Systems, IBM.

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This tool collects statistics delivered by the HMC, which are the processor cycles dispatched by the Power Hypervisor. Read The Current Issue: We use cookies to optimize your visit to our website. But in the fix description there is an information that an Operating System updates are required too.

Note that rPerf can only be used for making comparisons within Power servers. You are commenting using your Facebook account. Unfortunately, IBM is very conservative in published information regarding the vulnerability.

Not sure if there is anyone in IT world who has not heard about latest vulnerabilities in the modern chips. Martin February 19, at If you would like to change your cookie settings at any time please view our privacy policy for additional information.


IBM Power System CPW Performance Data: POWER8 vs. POWER9 ScaleOut Models

Left graph before patches, right one with patches. Many benchmarks exist for comparing servers, so why did IBM create the rPerf measurement?

To find out more, including how to control cookies, see here: The only way how to solve it, is to redesign the chip or patch the OS in the way that it will not allow to use this vulnerability. Bart February 19, at From information what we got so far, it looks powwr almost every modern chip which uses speculative processing is affected.

I just believe they did something. By continuing to use this website, you agree to their use. Leave a Reply Cancel reply Enter your comment here This site uses cookies. More Articles From Charlie Cler. These requirements would make it extremely costly to publish multiple data points for each Power Systems model. For workload migrations and server consolidation projects, rPerf data is frequently used for CPU sizing.

The fix is concurrent as long as you run the latest release level. There is no difference again. Jimmy May 7, at In addition, most benchmark rules require that the full benchmark be run and fully documented for each published data point. I will try to update this post within next days, because last Friday The amount of rPerfs required to run existing workloads can be determined and used to size new servers.


Getting the PTF on the system was a big question mark and probably many users still feel uncomfortable with number of available information.

I did a query — show me the jobs which consumed CPU the most.

IBM Power System CPW Performance Data: POWER8 vs. POWER9 ScaleOut Models | Arbor Solutions

Paul February 26, at There is almost no difference in CPU utilization. Patching is scheduled in waves. Notify me of new comments via email. I had no performance impact once rlerf fix get applied.

IBM Power Systems Performance Report

Since IBM owns and controls the rPerf benchmark, it can report both actual and estimated data for Power servers. I wrote a post how to collect it few years ago here.

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Of course, I have no idea what these or those PTFs fixed.