3142b37664
Previously, lockstat(1) would use a lock's address as its identifier when consuming data describing lock contention and hold events. After collecting the requested data, it would use ksyms(4) to resolve lock addresses to names. Of course, this doesn't work too well for locks contained in dynamically-allocated memory. This change modifies lockstat(1) to trace the lock names obtained from the base struct lock_object instead, leading to output that is generally much more useful. This change also removes the -c option, which is used to coalesce data for locks in an array. It's not possible to support this option without also tracing lock addresses, and since lock arrays in which the lock names are distinct are not very common in FreeBSD, it's simpler to just remove the option. Reviewed by: avg (earlier revision) Differential Revision: https://reviews.freebsd.org/D3661 |
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