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by sillywalk
860 days ago
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"... some mainframes have models or versions that are configured to operate slower than the potential speed of their CPs. This is widely known as kneecapping , although IBM prefers the term capacity setting, or something similar. It is done by using microcode to insert null cycles into the processor instruction stream. The purpose, again, is to control software costs by having the minimum mainframe model or version that meets the application requirements." https://www.ibm.com/docs/en/zos-basic-skills?topic=concepts-... |
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