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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IBM POWER rPerf and CPW Consolidated Data (inc POWER9) (IBM STG Lab Services UK&I POWER Team)

Paul February 26, at I had no performance impact once this fix get applied. More Articles From Charlie Cler.

There is no difference again.

In the end you can compare wait graphs before and after, and here there are no significant changes either. This site uses cookies. Email required Address never made public. As you can see, there is almost the same utilization, no spectacular grow.

Not sure if there is anyone in IT world who has not heard about latest vulnerabilities in the modern chips. Charlie Cler supports customers in a solutions-architect role at Forsythe Technology Inc. Leave a Reply Cancel reply Enter your comment here Notify me of new comments via email. These requirements would make it extremely costly to publish multiple data points for each Power Systems model.

In addition, most benchmark rules require that the full benchmark be run and fully documented for each published data point. IBM did not publish any official information about potential performance impact, neither how the security flaw was solved. The fix is concurrent as long as you run the latest release level. Disk Flash Servers Software Tape. You are commenting using your Twitter account.

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Jimmy May 7, at X We use cookies to optimize your visit to our prerf. Many benchmarks exist for comparing servers, so why did IBM create the rPerf measurement? I will try to update this post within next days, because last Friday The graph looks very similar. As you can see, no significant grow after patching.

Bart February 19, at Patching is scheduled in waves. Getting the PTF on the system was a big question mark and probably many users still feel uncomfortable with number of available information. Today Jan 31st we applied the fix on few test systems.

Fill in your details below or click an icon to log in: To find out more, including how to control cookies, see here: For workload migrations and server consolidation projects, rPerf data is frequently used pwer CPU sizing.

IBM Systems Magazine – More rPerf Resources

I just believe they did something. If your workload is better aligns with two threads per processor core, you should consider reducing the published POWER7 rPerf numbers by approximately 15 to 20 percent to get a more reasonable representation of its rPerf value. 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.

Of course, I have no idea what these or those PTFs fixed. If not, a server reboot is needed. Since Rper owns and controls the rPerf benchmark, it can report both actual and estimated data for Power servers.


How to Use rPerfs for Workload Migration and Server Consolidation

Note that rPerf can only be used for making comparisons within Power servers. Actually, in the OS V7R2 no performance degradation noted either.

There is almost no difference in CPU utilization. This has resulted in the publication of multiple rPerf values for each server based on varying processor core counts. Unfortunately, Ibbm is very conservative in published information regarding the vulnerability.

This tool collects statistics delivered by the HMC, which are the processor cycles dispatched by the Power Hypervisor. These I will installed within next days, and will try to deliver performance update to. I did a query — show me the jobs which consumed CPU the most.

Read The Current Issue: I will be giving updates in comming weeks. Running industry benchmarks can be very expensive. If you would like to change your cookie settings at any time please view our privacy policy for additional information.

But in the fix description there is an information that an Operating System updates are required too. We have carefully put this patch to test systems and closely monitored the performance. I wrote a post how to collect it few years ago here.

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