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Date: Thu, 6 Sep 2012 17:47:05 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Andi Kleen <andi@...stfloor.org>,
David Ahern <dsahern@...il.com>,
Namhyung Kim <namhyung@...nel.org>,
Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 11/12] perf diff: Add -F option to display formula for computation
Adding -F option to display the formula for specified computation.
This is mainly to facilitate debuging, but can be usefull anyway.
Adding this support for weighted diff computation.
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
---
tools/perf/Documentation/perf-diff.txt | 4 ++++
tools/perf/builtin-diff.c | 27 ++++++++++++++++++++++++++-
tools/perf/ui/stdio/hist.c | 8 ++++++++
tools/perf/ui/stdio/hist.h | 1 +
tools/perf/util/hist.h | 3 ++-
5 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 21cc2ef..4d65407 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -87,6 +87,10 @@ OPTIONS
--period::
Show period values for both compared hist entries.
+-F::
+--formula::
+ Show formula for given computation (supported: wdiff)
+
COMPARISON METHODS
------------------
delta
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 1297a01..9125eee 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -26,6 +26,7 @@ static char diff__default_sort_order[] = "dso,symbol";
static bool force;
static bool show_displacement;
static bool show_period;
+static bool show_formula;
static bool show_baseline_only;
static bool sort_compute;
@@ -174,6 +175,20 @@ double perf_diff__compute_wdiff(struct hist_entry *he)
return he->diff.wdiff;
}
+int perf_diff__formula_wdiff(struct hist_entry *he, char *bf, size_t size)
+{
+ struct hist_entry *pair = he->pair;
+ u64 new_period = he->period;
+ u64 old_period = pair ? pair->period : 0;
+ char formula[100];
+
+ scnprintf(formula, 100,
+ "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
+ new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
+
+ return scnprintf(bf, size, "%-50s", formula);
+}
+
static int hists__add_entry(struct hists *self,
struct addr_location *al, u64 period)
{
@@ -529,6 +544,8 @@ static const struct option options[] = {
"Entries differential computation selection"),
OPT_BOOLEAN('p', "period", &show_period,
"Show period values."),
+ OPT_BOOLEAN('F', "formula", &show_formula,
+ "Show formula."),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
@@ -572,11 +589,19 @@ static void setup_ui_stdio(void)
if (show_displacement)
hists_stdio_column__register_idx(HISTC_DISPLACEMENT);
+ if (show_formula)
+ switch (compute) {
+ case COMPUTE_WEIGHTED_DIFF:
+ hists_stdio_column__register_idx(HISTC_FORMULA_WEIGHTED_DIFF);
+ break;
+ default:
+ break;
+ };
+
if (show_period) {
hists_stdio_column__register_idx(HISTC_BASELINE_TOTAL_PERIOD);
hists_stdio_column__register_idx(HISTC_TOTAL_PERIOD);
}
-
}
int cmd_diff(int argc, const char **argv, const char *prefix __used)
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index ab5f27a..8cf4ebd 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -150,6 +150,13 @@ hists_stdio_column__displacement_snprintf(struct hist_entry *he, char *bf,
return scnprintf(bf, size, displ ? "%+5ld" : " ", displ);
}
+static int
+hists_stdio_column__formula_wdiff_snprintf(struct hist_entry *he, char *bf,
+ size_t size, unsigned int width __used)
+{
+ return perf_diff__formula_wdiff(he, bf, size);
+}
+
LIST_HEAD(hists_stdio_column__list);
#define DEF_COLUMN(name, c, w, h) \
@@ -175,6 +182,7 @@ DEF_COLUMN(delta, HISTC_DELTA, 8, "Delta")
DEF_COLUMN(ratio, HISTC_RATIO, 14, "Ratio")
DEF_COLUMN(wdiff, HISTC_WEIGHTED_DIFF, 13, "Weighted diff")
DEF_COLUMN(displacement, HISTC_DISPLACEMENT, 5, "Displ")
+DEF_COLUMN(formula_wdiff, HISTC_FORMULA_WEIGHTED_DIFF, 50, "Formula")
};
int hists_stdio_column__register_idx(int idx)
diff --git a/tools/perf/ui/stdio/hist.h b/tools/perf/ui/stdio/hist.h
index f725189..4f62224 100644
--- a/tools/perf/ui/stdio/hist.h
+++ b/tools/perf/ui/stdio/hist.h
@@ -21,4 +21,5 @@ double perf_diff__compute_delta(struct hist_entry *he);
double perf_diff__compute_ratio(struct hist_entry *he);
double perf_diff__compute_wdiff(struct hist_entry *he);
+int perf_diff__formula_wdiff(struct hist_entry *he, char *bf, size_t size);
#endif /* __PERF_UI_STDIO_HIST_H */
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 81e6d20..e1511cc 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -50,6 +50,7 @@ enum hist_column {
HISTC_RATIO,
HISTC_WEIGHTED_DIFF,
HISTC_DISPLACEMENT,
+ HISTC_FORMULA_WEIGHTED_DIFF,
/* sorted (hist_entry__sort_list) */
HISTC_SYMBOL,
@@ -67,7 +68,7 @@ enum hist_column {
HISTC_NR_COLS, /* Last entry */
/* Last stdio ui data column */
- HISTC_STDIO_NR_COLS = HISTC_DISPLACEMENT + 1,
+ HISTC_STDIO_NR_COLS = HISTC_FORMULA_WEIGHTED_DIFF + 1,
};
struct thread;
--
1.7.11.4
--
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