On 6/8/2018 2:06 PM, Joel C. Ewing wrote:
Would be curious if anyone has seen a more complete description about how the sub-capacity CP enforcement works.
Every so often (I believe 4 usec on my z13s), there is something akin to a timer interrupt in the chip that runs a millicode housekeeping routine. At the end of that routine, before returning to running normal instructions, a tight CPU loop is executed to burn up any excess capacity you didn't pay for.
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