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- Callwheels traced via KTR_CALLOUT. Each CPU is assigned a callwheel source. The events on this source are the execution of individual callout routines. Each routine shows up as a green rectangle while it is executed and the event details include the function pointer and argument. - Locks traced via KTR_LOCK. Currently, each lock name is assigned an event source (since the existing KTR_LOCK traces only include lock names and not pointers). This does mean that if multiple locks of the same name are manipulated, the source line for that name may be confusing. However, for many cases this can be useful. Locks are blue when they are held and purple when contested. The contention support is a bit weak due to limitations in the rw_rlock() and mtx_lock_spin() logging messages currently. I also have not added support for contention on lockmgr, sx, or rmlocks yet. What is there now can be profitably used to examine activity on Giant however. - Expand the width of the event source names column a bit to allow for some of the longer names of these new source types.
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