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]

Marcações:  smt scaled_throughput chris_gibson aix power7 vpm_throughput_mode

  In a previous post I discussed how you can identify some of the different types of a PowerVM Capacity on Demand (CoD) activation keys from IBM.   Recently I had to Activate Memory Expansion (AME) on a couple of POWER7 systems. I discovered that all of the keys contained a similar string. It appears that if a CoD key contains the string CA1F0000000800 then it is safe to assume it will activate AME for a particular system. e.g.     9741EF3AE6969F17 CA1F0000000800 419D  937A1240F00F5B05 CA1F0000000800 413D   And while I’m talking about AME,... [More]

Marcações:  lshwres ca1f0000000800 active_memory_expansion powervm ame power7 chris_gibson curr_mem_expansion chhwres mem_expansion pend_mem_expansion dlpar aix

Here are some questions I received recently regarding VLAN tagging on the VIO server. My answers are shown in green .   “Hi Chris,   Q: I’m trying to understand when, where and why there would be the need to use ‘mkvdev –vlan (etc.) on the VIOS, and I’m wondering whether you would be able to clarify this for me, please.   Is it necessary to add the VLAN tag devices to the SEA, or is it suffice to just have them defined within the Virtual Ethernet itself which is part of the SEA?”   A: It is suffice to simply define the VLAN ids assigned... [More]

Marcações:  ent6 tagging sea virt_adapters=ent3 power7 vlan hmc tag -attr ent5 mkvdev -dev -vlan chdev dlpar dynamic

A colleague of mine contacted me during the week to ask how one could determine if a POWER7 system was capable of Active Memory Expansion. I thought I'd share my response with everyone who follows my blog.   You can check if the system is capable of providing Active Memory Expansion (AME), from the HMC command line using the lssyscfg command, as shown here:   hscroot@hmc1:~> lssyscfg -r sys -m Server-8233-E8B-SN1000 -F active_mem_expansion_capable 1 Alternatively you can view the capabilities of the managed system from the HMC GUI,... [More]

Marcações:  ame gibson power7 sap lparstat hmc memory chris amepat expansion active aix lssyscfg