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Subject[PATCH 1/1 tip] perf report: Adjust column width to the values sampled
Example:

[acme@doppio pahole]$ perf report --sort comm,dso,symbol | head -13
12.79% pahole /usr/lib64/libdw-0.141.so [.] __libdw_find_attr
8.90% pahole /lib64/libc-2.10.1.so [.] _int_malloc
8.68% pahole /usr/lib64/libdw-0.141.so [.] __libdw_form_val_len
8.15% pahole /lib64/libc-2.10.1.so [.] __GI_strcmp
6.80% pahole /lib64/libc-2.10.1.so [.] __tsearch
5.54% pahole ./build/libdwarves.so.1.0.0 [.] tag__recode_dwarf_type
[acme@doppio pahole]$

[acme@doppio pahole]$ perf report --sort comm,dso,symbol -d /lib64/libc-2.10.1.so | head -10
21.92% pahole /lib64/libc-2.10.1.so [.] _int_malloc
20.08% pahole /lib64/libc-2.10.1.so [.] __GI_strcmp
16.75% pahole /lib64/libc-2.10.1.so [.] __tsearch
[acme@doppio pahole]$

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-report.c | 93 ++++++++++++++++++++++++--------
tools/perf/util/include/linux/kernel.h | 8 +++
tools/perf/util/symbol.c | 1 +
tools/perf/util/symbol.h | 1 +
4 files changed, 80 insertions(+), 23 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 4e5cc26..db566ea 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -360,12 +360,27 @@ static struct thread *thread__new(pid_t pid)
return self;
}

+static unsigned int dsos__longest_name,
+ comms__longest_name,
+ threads__longest_name;
+
static int thread__set_comm(struct thread *self, const char *comm)
{
if (self->comm)
free(self->comm);
self->comm = strdup(comm);
- return self->comm ? 0 : -ENOMEM;
+ if (!self->comm)
+ return -ENOMEM;
+
+ if (!comm_list || strlist__has_entry(comm_list, comm)) {
+ unsigned int slen = strlen(comm);
+ if (slen > comms__longest_name) {
+ comms__longest_name = slen;
+ threads__longest_name = slen + 6;
+ }
+ }
+
+ return 0;
}

static size_t thread__fprintf(struct thread *self, FILE *fp)
@@ -536,7 +551,8 @@ struct sort_entry {

int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
- size_t (*print)(FILE *fp, struct hist_entry *);
+ size_t (*print)(FILE *fp, struct hist_entry *, unsigned int width);
+ unsigned int *width;
};

static int64_t cmp_null(void *l, void *r)
@@ -558,15 +574,17 @@ sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__thread_print(FILE *fp, struct hist_entry *self)
+sort__thread_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
+ return fprintf(fp, "%*s:%5d", width - 6, self->thread->comm ?: "",
+ self->thread->pid);
}

static struct sort_entry sort_thread = {
- .header = " Command: Pid",
+ .header = "Command: Pid",
.cmp = sort__thread_cmp,
.print = sort__thread_print,
+ .width = &threads__longest_name,
};

/* --sort comm */
@@ -590,16 +608,17 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__comm_print(FILE *fp, struct hist_entry *self)
+sort__comm_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- return fprintf(fp, "%16s", self->thread->comm);
+ return fprintf(fp, "%*s", width, self->thread->comm);
}

static struct sort_entry sort_comm = {
- .header = " Command",
+ .header = "Command",
.cmp = sort__comm_cmp,
.collapse = sort__comm_collapse,
.print = sort__comm_print,
+ .width = &comms__longest_name,
};

/* --sort dso */
@@ -617,18 +636,19 @@ sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__dso_print(FILE *fp, struct hist_entry *self)
+sort__dso_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
if (self->dso)
- return fprintf(fp, "%-25s", self->dso->name);
+ return fprintf(fp, "%-*s", width, self->dso->name);

- return fprintf(fp, "%016llx ", (u64)self->ip);
+ return fprintf(fp, "%*llx", width, (u64)self->ip);
}

static struct sort_entry sort_dso = {
- .header = "Shared Object ",
+ .header = "Shared Object",
.cmp = sort__dso_cmp,
.print = sort__dso_print,
+ .width = &dsos__longest_name,
};

/* --sort symbol */
@@ -648,7 +668,7 @@ sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__sym_print(FILE *fp, struct hist_entry *self)
+sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used)
{
size_t ret = 0;

@@ -690,19 +710,19 @@ sort__parent_cmp(struct hist_entry *left, struct hist_entry *right)
}

static size_t
-sort__parent_print(FILE *fp, struct hist_entry *self)
+sort__parent_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- size_t ret = 0;
-
- ret += fprintf(fp, "%-20s", self->parent ? self->parent->name : "[other]");
-
- return ret;
+ return fprintf(fp, "%-*s", width,
+ self->parent ? self->parent->name : "[other]");
}

+static unsigned int parent_symbol__longest_name;
+
static struct sort_entry sort_parent = {
- .header = "Parent symbol ",
+ .header = "Parent symbol",
.cmp = sort__parent_cmp,
.print = sort__parent_print,
+ .width = &parent_symbol__longest_name,
};

static int sort__need_collapse = 0;
@@ -977,7 +997,7 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
continue;

fprintf(fp, " ");
- ret += se->print(fp, self);
+ ret += se->print(fp, self, se->width ? *se->width : 0);
}

ret += fprintf(fp, "\n");
@@ -992,6 +1012,17 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
*
*/

+static void dso__calc_longest_name(struct dso *self)
+{
+ if (!dso_list || strlist__has_entry(dso_list, self->name)) {
+ unsigned int slen = strlen(self->name);
+ if (slen > dsos__longest_name)
+ dsos__longest_name = slen;
+ }
+
+ self->slen_calculated = 1;
+}
+
static struct symbol *
resolve_symbol(struct thread *thread, struct map **mapp,
struct dso **dsop, u64 *ipp)
@@ -1011,6 +1042,14 @@ resolve_symbol(struct thread *thread, struct map **mapp,

map = thread__find_map(thread, ip);
if (map != NULL) {
+ /*
+ * We have to do this here as we may have a dso
+ * with no symbol hit that has a name longer than
+ * the ones with symbols sampled.
+ */
+ if (!map->dso->slen_calculated)
+ dso__calc_longest_name(map->dso);
+
if (mapp)
*mapp = map;
got_map:
@@ -1282,6 +1321,7 @@ static size_t output__fprintf(FILE *fp, u64 total_samples)
struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
+ unsigned int width;

fprintf(fp, "\n");
fprintf(fp, "#\n");
@@ -1292,7 +1332,10 @@ static size_t output__fprintf(FILE *fp, u64 total_samples)
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (exclude_other && (se == &sort_parent))
continue;
- fprintf(fp, " %s", se->header);
+ width = strlen(se->header);
+ if (se->width)
+ width = *se->width = max(*se->width, width);
+ fprintf(fp, " %*s", width, se->header);
}
fprintf(fp, "\n");

@@ -1304,7 +1347,11 @@ static size_t output__fprintf(FILE *fp, u64 total_samples)
continue;

fprintf(fp, " ");
- for (i = 0; i < strlen(se->header); i++)
+ if (se->width)
+ width = *se->width;
+ else
+ width = strlen(se->header);
+ for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n");
diff --git a/tools/perf/util/include/linux/kernel.h b/tools/perf/util/include/linux/kernel.h
index 99c1b3d..a6b8739 100644
--- a/tools/perf/util/include/linux/kernel.h
+++ b/tools/perf/util/include/linux/kernel.h
@@ -18,4 +18,12 @@
(type *)((char *)__mptr - offsetof(type, member)); })
#endif

+#ifndef max
+#define max(x, y) ({ \
+ typeof(x) _max1 = (x); \
+ typeof(y) _max2 = (y); \
+ (void) (&_max1 == &_max2); \
+ _max1 > _max2 ? _max1 : _max2; })
+#endif
+
#endif
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 4683b67..8efe7e4 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -65,6 +65,7 @@ struct dso *dso__new(const char *name, unsigned int sym_priv_size)
self->syms = RB_ROOT;
self->sym_priv_size = sym_priv_size;
self->find_symbol = dso__find_symbol;
+ self->slen_calculated = 0;
}

return self;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 7918cff..2f92b21 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -25,6 +25,7 @@ struct dso {
struct symbol *(*find_symbol)(struct dso *, u64 ip);
unsigned int sym_priv_size;
unsigned char adjust_symbols;
+ unsigned char slen_calculated;
char name[0];
};

--
1.6.2.5


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