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The wrong bit was set to keep the lock on freq counter update. And the read functions were re-worked to use volatile. Moreover, when a freq counter is updated, it is now rotated only if the current counter is in the past (now.tv_sec > ctr->curr_sec). It is important with threads because the current time (now) is thread-local. So, rounded to the second, the time may vary by more or less 1 second. So a freq counter rotated by one thread may be see 1 second in the future. In this case, it is updated but not rotated. |
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