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This is a temporary hack. Currently trace points for PELT are only triggered when the PELT metrics consumed by the scheduler are actually updated, i.e. util_avg. This means no updates if no 1 ms boundary is being crossed by the update. When reconstructing the PELT signal based on this data, the peak PELT value can therefore be up to 1 ms worth of PELT accumulation off (23 in absolute terms). This leads to a discrepancy that causes test cases to fail. This patch ensures that trace events are always emitted even if the metrics haven't been updated which should allow accurate reconstruction of the PELT signals.
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