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Chris Gibson's AIX and PowerVM blog.
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Testing "Scaled Throughput" mode with AIX 7.1 on POWER7.

cggibbo 270000TMUJ | | Comments (3) | Visits (23347)

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Starting with AIX 6.1 TL08 and AIX 7.1 TL02 there’s a new AIX CPU tuning feature called “ Scaled Throughput ” mode. This is supported on POWER7 and POWER7+ processors only ( do not try this on POWER6!). This new mode has the ability to dispatch workload to more SMT threads per VP, avoiding the need to unfold additional VPs. I’ve heard it described as being more “POWER6 like”. I’m not suggesting that you use this feature. This post simply discusses what this new mode can do.   By default AIX (on POWER7) operates in “ Raw Throughput” mode.... [More]

Tags:  smt chris_gibson scaled_throughput aix power7 vpm_throughput_mode

Updating your NIM master to AIX 7.1 TL2? Take note!

cggibbo 270000TMUJ | | Comments (7) | Visits (24599)

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After updating my NIM master to AIX 7.1 TL2 SP1 (7100-02-01-1245), I noticed a problem. Whenever I installed a new AIX partition using NIM, the resources allocated to the NIM client were not being de-allocated, even though the installation was completing successfully. Also, if I tried to run my usual ‘NIM client reset’ script (below), the resources were still allocated.   #!/usr/bin/ksh # Reset a NIM client.   if [[ "$1" = "" ]] ; then   echo Please specify a NIM client to reset e.g. aixlpar1. else   if lsnim -l $1... [More]

Tags:  not nim working tl2 issue chris_gibson 7.1 aix resources de-allocate
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