Messages in this thread | | | Date | Thu, 20 Feb 2020 08:43:17 -0800 | From | Andi Kleen <> | Subject | Re: [PATCH 0/5] Support metric group constraint |
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> For other metric groups, even they have cycles, the issue should not be > triggered. > For example, if they have 4 or less events, the cycles can be scheduled to > GP counter instead. > If they have 6 or more events, the weak group will be reject anyway. > Perf tool will open it as non-group (standalone metrics).
Technically it can also happen for 9 events with Hyper Threading off or on Icelake (8 generic counters)
I didn't think we had any of those, but please double check.
-Andi
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