- update to 1.5.1:
* Fix free_zpage() offset accounting. The read_zpage() subtracted
the offset from the file start to find where to get the
compressed data, but the free_zpage() did not, and would fail to
find and free the passed in zpage.
* Have function_graph plugin break apart functions that migrate
between CPUs from entry to exit even if there is no event in
between.
* Fix iterators for when there's CPUs with no data. It was using
the total number of CPUs to iterate the cpu_data[] array, that
only contains CPUs with content.
* Fix iterator with respect to function_graph handle that may do
a peek of the next event to know if it should merge the entry
and exit events of a function.
* Some other small fixes and clean ups
* tracecmd_iterate_events_reverse(): Will iterate events in the
trace.dat file from the last event to the first.
* tracecmd_iterate_reset(): Reset the iterator to restart from the
beginning.
* Fix meson build
* Have callbacks exit out of iterator as the man page for
tracecmd_iterate_events() says it should.
* Have tracecmd_iterate_events() start where it left off
* Speed up freeing the zpages by using an rbtree instead of a flat
link