c554aef0e1
- pressing 'B' on the serial cnsole prints statistics for BKL per cpu. - 'b' resets the counters - it presents number of cycles each CPU spends in kernel, how many cycyles it spends spinning while waiting for the BKL - it shows optimistic estimation in how many cases we get the lock immediately without spinning. As the test is not atomic the lock may be already held by some other cpu before we actually try to acquire it. |
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