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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-10 13:04:11 -0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-10 13:13:49 -0300 |
commit | 1c02c4d2e92f2097f1bba63ec71560b0e05a7f36 (patch) | |
tree | ad2a722931398ce3cd3ae850c4cfa148558a52ea /tools/perf/scripts/perl | |
parent | d118f8ba6ac2af2bf11d40cba657c813f0f39ca2 (diff) | |
download | op-kernel-dev-1c02c4d2e92f2097f1bba63ec71560b0e05a7f36.zip op-kernel-dev-1c02c4d2e92f2097f1bba63ec71560b0e05a7f36.tar.gz |
perf hist: Introduce hists class and move lots of methods to it
In cbbc79a we introduced support for multiple events by introducing a
new "event_stat_id" struct and then made several perf_session methods
receive a point to it instead of a pointer to perf_session, and kept the
event_stats and hists rb_tree in perf_session.
While working on the new newt based browser, I realised that it would be
better to introduce a new class, "hists" (short for "histograms"),
renaming the "event_stat_id" struct and the perf_session methods that
were really "hists" methods, as they manipulate only struct hists
members, not touching anything in the other perf_session members.
Other optimizations, such as calculating the maximum lenght of a symbol
name present in an hists instance will be possible as we add them,
avoiding a re-traversal just for finding that information.
The rationale for the name "hists" to replace "event_stat_id" is that we
may have multiple sets of hists for the same event_stat id, as, for
instance, the 'perf diff' tool has, so event stat id is not what
characterizes what this struct and the functions that manipulate it do.
Cc: Eric B Munson <ebmunson@us.ibm.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/scripts/perl')
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