lkml.org 
[lkml]   [2012]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] perf: Add a new sort order: SORT_INCLUSIVE (v6)
Date
Each entry that used to get added once to the histogram, now is added
chain->nr times, each time with one less entry in the
callchain.

This will result in a non-leaf function that appears in a lot of
samples to get a histogram entry with lots of hits.

The user can then drill down into the callchains of functions that
have high inclusive times.

Sample command lines:

$ perf record -ag -- sleep 1
$ perf report -g graph,0.5,callee -n -s inclusive

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Namhyung Kim <namhyung.kim@lge.com>
Cc: Ingo Molnar <mingo@elte.hu>
CC: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
---
tools/perf/builtin-annotate.c | 2 +-
tools/perf/builtin-diff.c | 2 +-
tools/perf/builtin-report.c | 14 +++----
tools/perf/builtin-top.c | 2 +-
tools/perf/util/callchain.c | 15 +++++++
tools/perf/util/callchain.h | 4 ++
tools/perf/util/hist.c | 87 ++++++++++++++++++++++++++++++++++++++--
tools/perf/util/hist.h | 4 +-
tools/perf/util/sort.c | 14 +++++++
tools/perf/util/sort.h | 4 ++
10 files changed, 131 insertions(+), 17 deletions(-)
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 806e0a2..5651b7b 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -62,7 +62,7 @@ static int perf_evsel__add_sample(struct perf_evsel *evsel,
return 0;
}

- he = __hists__add_entry(&evsel->hists, al, NULL, 1);
+ he = __hists__add_entry(&evsel->hists, al, NULL, NULL, 1);
if (he == NULL)
return -ENOMEM;

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 4f19513..4a30856 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -27,7 +27,7 @@ static bool show_displacement;
static int hists__add_entry(struct hists *self,
struct addr_location *al, u64 period)
{
- if (__hists__add_entry(self, al, NULL, period) != NULL)
+ if (__hists__add_entry(self, al, NULL, NULL, period) != NULL)
return 0;
return -ENOMEM;
}
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0e95c74..cc6d30f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -138,6 +138,7 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
struct symbol *parent = NULL;
int err = 0;
struct hist_entry *he;
+ struct callchain_cursor *cursor;

if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
err = machine__resolve_callchain(machine, evsel, al->thread,
@@ -146,17 +147,12 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
return err;
}

- he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
+ cursor = &evsel->hists.callchain_cursor;
+ he = __hists__add_entry(&evsel->hists, al, parent,
+ cursor, sample->period);
if (he == NULL)
return -ENOMEM;

- if (symbol_conf.use_callchain) {
- err = callchain_append(he->callchain,
- &evsel->hists.callchain_cursor,
- sample->period);
- if (err)
- return err;
- }
/*
* Only in the newt browser we are doing integrated annotation,
* so we don't allocated the extra space needed because the stdio
@@ -749,6 +745,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
} else {
sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
+ sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
+ sort_entry__setup_elide(&sort_sym_inclusive, symbol_conf.sym_list, "inclusive", stdout);
}

ret = __cmd_report(&report);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index e3c63ae..41e7153 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -235,7 +235,7 @@ static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
{
struct hist_entry *he;

- he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
+ he = __hists__add_entry(&evsel->hists, al, NULL, NULL, sample->period);
if (he == NULL)
return NULL;

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 9f7106a..2b824a5 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -459,3 +459,18 @@ int callchain_cursor_append(struct callchain_cursor *cursor,

return 0;
}
+
+int callchain_get(struct callchain_cursor *cursor,
+ struct addr_location *al)
+{
+ struct callchain_cursor_node *node = cursor->curr;
+
+ if (node == NULL)
+ return -1;
+
+ al->map = node->map;
+ al->sym = node->sym;
+ al->addr = node->ip;
+
+ return 0;
+}
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 7f9c0f1..dcff6ec 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -103,9 +103,13 @@ int callchain_merge(struct callchain_cursor *cursor,

struct ip_callchain;
union perf_event;
+struct addr_location;

bool ip_callchain__valid(struct ip_callchain *chain,
const union perf_event *event);
+
+int callchain_get(struct callchain_cursor *cursor, struct addr_location *al);
+
/*
* Initialize a cursor before adding entries inside, but keep
* the previously allocated entries as a cache.
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 2c624ad..21d003f 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -222,7 +222,7 @@ static void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h)
if (!h->filtered) {
hists__calc_col_len(hists, h);
++hists->nr_entries;
- hists->stats.total_period += h->period;
+ hists->stats.total_period += h->period_self;
}
}

@@ -302,9 +302,10 @@ struct hist_entry *__hists__add_branch_entry(struct hists *self,
return add_hist_entry(self, &entry, al, period);
}

-struct hist_entry *__hists__add_entry(struct hists *self,
- struct addr_location *al,
- struct symbol *sym_parent, u64 period)
+static struct hist_entry *___hists__add_entry(struct hists *self,
+ struct addr_location *al,
+ struct symbol *sym_parent,
+ u64 period)
{
struct hist_entry entry = {
.thread = al->thread,
@@ -323,6 +324,82 @@ struct hist_entry *__hists__add_entry(struct hists *self,
return add_hist_entry(self, &entry, al, period);
}

+static struct hist_entry *__hists__add_entry_inclusive(struct hists *hists,
+ struct addr_location *al,
+ struct symbol *sym_parent,
+ struct callchain_cursor *cursor,
+ u64 period)
+{
+ struct callchain_cursor iter = *cursor;
+ struct callchain_cursor new_cursor = *cursor;
+ struct hist_entry *he, *orig_he = NULL;
+ int err;
+ u64 i;
+
+ iter.pos = 0;
+ iter.curr = iter.first;
+ for (i = 0; i < cursor->nr; i++) {
+ struct addr_location al_child = *al;
+
+ err = callchain_get(&iter, &al_child);
+ if (err)
+ return NULL;
+ he = ___hists__add_entry(hists, &al_child, sym_parent, period);
+ if (he == NULL)
+ return NULL;
+
+ new_cursor.first = iter.curr;
+ new_cursor.nr = cursor->nr - i;
+ if (i == 0) {
+ he->period_self += period;
+ orig_he = he;
+ }
+ err = callchain_append(he->callchain, &new_cursor, period);
+ if (err)
+ return NULL;
+ callchain_cursor_advance(&iter);
+ }
+ return orig_he;
+}
+
+static struct hist_entry *__hists__add_entry_single(struct hists *hists,
+ struct addr_location *al,
+ struct symbol *sym_parent,
+ struct callchain_cursor *cursor,
+ u64 period)
+{
+ struct hist_entry *he;
+ int err;
+
+ he = ___hists__add_entry(hists, al, sym_parent, period);
+ if (he == NULL)
+ return NULL;
+ he->period_self += period;
+ if (symbol_conf.use_callchain) {
+ err = callchain_append(he->callchain, cursor, period);
+ if (err)
+ return NULL;
+ }
+ return he;
+}
+
+struct hist_entry *__hists__add_entry(struct hists *hists,
+ struct addr_location *al,
+ struct symbol *parent,
+ struct callchain_cursor *cursor,
+ u64 period)
+{
+ struct hist_entry *he;
+
+ if (sort__has_inclusive && symbol_conf.use_callchain)
+ he = __hists__add_entry_inclusive(hists, al, parent,
+ cursor, period);
+ else
+ he = __hists__add_entry_single(hists, al, parent,
+ cursor, period);
+ return he;
+}
+
int64_t
hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
{
@@ -1181,7 +1258,7 @@ static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h
if (h->ms.unfolded)
hists->nr_entries += h->nr_rows;
h->row_offset = 0;
- hists->stats.total_period += h->period;
+ hists->stats.total_period += h->period_self;
hists->stats.nr_events[PERF_RECORD_SAMPLE] += h->nr_events;

hists__calc_col_len(hists, h);
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 2cae9df..0b53b87 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -73,7 +73,9 @@ struct hists {

struct hist_entry *__hists__add_entry(struct hists *self,
struct addr_location *al,
- struct symbol *parent, u64 period);
+ struct symbol *parent,
+ struct callchain_cursor *cursor,
+ u64 period);
int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 88dbcf6..01e5d10 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -9,6 +9,7 @@ const char *sort_order = default_sort_order;
int sort__need_collapse = 0;
int sort__has_parent = 0;
int sort__branch_mode = -1; /* -1 = means not set */
+int sort__has_inclusive = 0;

enum sort_type sort__first_dimension;

@@ -238,6 +239,13 @@ struct sort_entry sort_sym = {
.se_width_idx = HISTC_SYMBOL,
};

+struct sort_entry sort_sym_inclusive = {
+ .se_header = "Symbol (Inclusive)",
+ .se_cmp = sort__sym_cmp,
+ .se_snprintf = hist_entry__sym_snprintf,
+ .se_width_idx = HISTC_SYMBOL,
+};
+
/* --sort parent */

static int64_t
@@ -431,6 +439,7 @@ static struct sort_dimension sort_dimensions[] = {
DIM(SORT_DSO_FROM, "dso_from", sort_dso_from),
DIM(SORT_DSO_TO, "dso_to", sort_dso_to),
DIM(SORT_SYM, "symbol", sort_sym),
+ DIM(SORT_INCLUSIVE, "inclusive", sort_sym_inclusive),
DIM(SORT_SYM_TO, "symbol_from", sort_sym_from),
DIM(SORT_SYM_FROM, "symbol_to", sort_sym_to),
DIM(SORT_PARENT, "parent", sort_parent),
@@ -459,6 +468,9 @@ int sort_dimension__add(const char *tok)
sort__has_parent = 1;
}

+ if (sd->entry == &sort_sym_inclusive)
+ sort__has_inclusive = 1;
+
if (sd->taken)
return 0;

@@ -474,6 +486,8 @@ int sort_dimension__add(const char *tok)
sort__first_dimension = SORT_DSO;
else if (!strcmp(sd->name, "symbol"))
sort__first_dimension = SORT_SYM;
+ else if (!strcmp(sd->name, "inclusive"))
+ sort__first_dimension = SORT_INCLUSIVE;
else if (!strcmp(sd->name, "parent"))
sort__first_dimension = SORT_PARENT;
else if (!strcmp(sd->name, "cpu"))
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 472aa5a..704283f 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -32,10 +32,12 @@ extern const char default_sort_order[];
extern int sort__need_collapse;
extern int sort__has_parent;
extern int sort__branch_mode;
+extern int sort__has_inclusive;
extern char *field_sep;
extern struct sort_entry sort_comm;
extern struct sort_entry sort_dso;
extern struct sort_entry sort_sym;
+extern struct sort_entry sort_sym_inclusive;
extern struct sort_entry sort_parent;
extern struct sort_entry sort_dso_from;
extern struct sort_entry sort_dso_to;
@@ -53,6 +55,7 @@ struct hist_entry {
struct rb_node rb_node_in;
struct rb_node rb_node;
u64 period;
+ u64 period_self;
u64 period_sys;
u64 period_us;
u64 period_guest_sys;
@@ -93,6 +96,7 @@ enum sort_type {
SORT_SYM_FROM,
SORT_SYM_TO,
SORT_MISPREDICT,
+ SORT_INCLUSIVE,
};

/*
--
1.7.8.4


\
 
 \ /
  Last update: 2012-03-31 07:43    [from the cache]
©2003-2011 Jasper Spaans