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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I did a query — show me the jobs which consumed CPU the most. As you can see, there is almost the same utilization, no spectacular grow. He can be reached at ccler forsythe. Paul February 26, at I just believe they did something.

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

This site uses cookies. You are commenting using your Twitter ibj. There is no difference again. For workload migrations and server consolidation projects, rPerf data is frequently used for CPU sizing. Since IBM owns and controls the rPerf benchmark, it can report both actual and estimated data for Power servers.

Left graph before patches, right one with patches. The roll out takes time. I wrote a post how to collect it few years ago here. Patching is scheduled in waves. You are commenting using your WordPress. Read The Current Issue: 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. I will be giving updates in comming weeks. Unfortunately, IBM is very conservative in published information regarding the vulnerability.


If not, a server reboot is needed. I had no performance impact once this fix get applied. Many benchmarks exist for comparing servers, so why did IBM create the rPerf measurement?

The fix is concurrent as long as you run the latest release level. Email required Address never made public. IBM did not publish any official information about potential performance impact, neither how the security flaw was solved.

Today Jan 31st we applied the fix on few test systems.

How to Use rPerfs for Workload Migration and Server Consolidation

Disk Flash Servers Software Tape. The main reason was to publish data for a broad selection of Power Systems servers.

Jimmy May 7, at Of course, I have no idea what these or those PTFs fixed. If you would like to change your cookie settings at any time please view our privacy policy for additional information. Actually, in the OS V7R2 no performance degradation noted either.

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To find out more, including how to control cookies, see here: This data is far away from precise capacity information, but I said before, this is the quickest way. From information what we got so far, it looks that almost every modern chip which uses speculative processing is affected.

The graph looks very similar. But in the fix description there is an information that an Operating System updates are required too.

There is almost no difference in CPU utilization. Getting the PTF on the system was a big question mark and probably many users still feel uncomfortable with number of available information.

Do not forget that fixes for VIOSes were released as well. The amount of rPerfs required to run existing workloads can be determined and used to size new servers. Having this comprehensive set of information makes it easier to estimate the commercial workload CPU performance for powee Power Systems server.