perf diff: Change formula methods to work with pair directly
Changing formula methods to operate over hist entry and its pair
directly. This makes the code more obvious and readable, instead of all
time checking for pair being != NULL.
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1354110769-2998-7-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 235503a..c1b2fad 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -229,6 +229,7 @@
double perf_diff__compute_delta(struct hist_entry *he, struct hist_entry *pair);
double perf_diff__compute_ratio(struct hist_entry *he, struct hist_entry *pair);
s64 perf_diff__compute_wdiff(struct hist_entry *he, struct hist_entry *pair);
-int perf_diff__formula(char *buf, size_t size, struct hist_entry *he);
+int perf_diff__formula(struct hist_entry *he, struct hist_entry *pair,
+ char *buf, size_t size);
double perf_diff__period_percent(struct hist_entry *he, u64 period);
#endif /* __PERF_HIST_H */