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Date: Thu, 27 Sep 2012 13:09:33 +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>,
Namhyung Kim <namhyung@...nel.org>,
Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 12/14] 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 debugging, but can be useful anyway.
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: 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 | 67 +++++++++++++++++++++++++++++++++-
tools/perf/ui/hist.c | 24 +++++++++++-
tools/perf/ui/stdio/hist.c | 2 +-
tools/perf/util/hist.h | 2 +
5 files changed, 96 insertions(+), 3 deletions(-)
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 21cc2ef..194f37d 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.
+
COMPARISON METHODS
------------------
delta
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 799f395..504caf2 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -25,6 +25,7 @@ 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;
@@ -189,6 +190,62 @@ double perf_diff__compute_wdiff(struct hist_entry *he)
return he->diff.wdiff;
}
+static int formula_delta(struct hist_entry *he, char *buf, size_t size)
+{
+ struct hist_entry *pair = he->pair;
+
+ if (!pair)
+ return -1;
+
+ return scnprintf(buf, size,
+ "(%" PRIu64 " * 100 / %" PRIu64 ") - "
+ "(%" PRIu64 " * 100 / %" PRIu64 ")",
+ he->period, he->hists->stats.total_period,
+ pair->period, pair->hists->stats.total_period);
+}
+
+static int formula_ratio(struct hist_entry *he, char *buf, size_t size)
+{
+ struct hist_entry *pair = he->pair;
+ double new_period = he->period;
+ double old_period = pair ? pair->period : 0;
+
+ if (!pair)
+ return -1;
+
+ return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
+}
+
+static int formula_wdiff(struct hist_entry *he, char *buf, size_t size)
+{
+ struct hist_entry *pair = he->pair;
+ u64 new_period = he->period;
+ u64 old_period = pair ? pair->period : 0;
+
+ if (!pair)
+ return -1;
+
+ return scnprintf(buf, size,
+ "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
+ new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
+}
+
+int perf_diff__formula(char *buf, size_t size, struct hist_entry *he)
+{
+ switch (compute) {
+ case COMPUTE_DELTA:
+ return formula_delta(he, buf, size);
+ case COMPUTE_RATIO:
+ return formula_ratio(he, buf, size);
+ case COMPUTE_WEIGHTED_DIFF:
+ return formula_wdiff(he, buf, size);
+ default:
+ BUG_ON(1);
+ }
+
+ return -1;
+}
+
static int hists__add_entry(struct hists *self,
struct addr_location *al, u64 period)
{
@@ -542,6 +599,8 @@ static const struct option options[] = {
setup_compute),
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"),
@@ -570,7 +629,10 @@ static void ui_init(void)
/* No overhead column. */
perf_hpp__column_enable(PERF_HPP__OVERHEAD, false);
- /* Display baseline/delta/ratio/displacement/periods columns. */
+ /*
+ * Display baseline/delta/ratio/displacement/
+ * formula/periods columns.
+ */
perf_hpp__column_enable(PERF_HPP__BASELINE, true);
switch (compute) {
@@ -590,6 +652,9 @@ static void ui_init(void)
if (show_displacement)
perf_hpp__column_enable(PERF_HPP__DISPL, true);
+ if (show_formula)
+ perf_hpp__column_enable(PERF_HPP__FORMULA, true);
+
if (show_period) {
perf_hpp__column_enable(PERF_HPP__PERIOD, true);
perf_hpp__column_enable(PERF_HPP__PERIOD_BASELINE, true);
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index f97c16e..04e34f3 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -359,6 +359,27 @@ static int hpp__entry_displ(struct perf_hpp *hpp,
return scnprintf(hpp->buf, hpp->size, fmt, buf);
}
+static int hpp__header_formula(struct perf_hpp *hpp)
+{
+ const char *fmt = symbol_conf.field_sep ? "%s" : "%70s";
+
+ return scnprintf(hpp->buf, hpp->size, fmt, "Formula");
+}
+
+static int hpp__width_formula(struct perf_hpp *hpp __maybe_unused)
+{
+ return 70;
+}
+
+static int hpp__entry_formula(struct perf_hpp *hpp, struct hist_entry *he)
+{
+ const char *fmt = symbol_conf.field_sep ? "%s" : "%-70s";
+ char buf[96] = " ";
+
+ perf_diff__formula(buf, sizeof(buf), he);
+ return scnprintf(hpp->buf, hpp->size, fmt, buf);
+}
+
#define HPP__COLOR_PRINT_FNS(_name) \
.header = hpp__header_ ## _name, \
.width = hpp__width_ ## _name, \
@@ -383,7 +404,8 @@ struct perf_hpp_fmt perf_hpp__format[] = {
{ .cond = false, HPP__PRINT_FNS(delta) },
{ .cond = false, HPP__PRINT_FNS(ratio) },
{ .cond = false, HPP__PRINT_FNS(wdiff) },
- { .cond = false, HPP__PRINT_FNS(displ) }
+ { .cond = false, HPP__PRINT_FNS(displ) },
+ { .cond = false, HPP__PRINT_FNS(formula) }
};
#undef HPP__COLOR_PRINT_FNS
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 850c6d2..176b9ae 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -342,7 +342,7 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
const char *sep = symbol_conf.field_sep;
const char *col_width = symbol_conf.col_width_list_str;
int idx, nr_rows = 0;
- char bf[64];
+ char bf[96];
struct perf_hpp dummy_hpp = {
.buf = bf,
.size = sizeof(bf),
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index ff307bf..bedbd71 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -145,6 +145,7 @@ enum {
PERF_HPP__RATIO,
PERF_HPP__WEIGHTED_DIFF,
PERF_HPP__DISPL,
+ PERF_HPP__FORMULA,
PERF_HPP__MAX_INDEX
};
@@ -211,4 +212,5 @@ unsigned int hists__sort_list_width(struct hists *self);
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(char *buf, size_t size, struct hist_entry *he);
#endif /* __PERF_HIST_H */
--
1.7.11.4
--
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