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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-03-15 15:03:50 -0300
committerIngo Molnar <mingo@elte.hu>2010-03-16 09:52:36 +0100
commitb63be8d7beda7fe5879559be6f70f8e1c93109e4 (patch)
treef5bd2f8f24030539029d31a18ab18dc35f1cfdb2 /tools
parentfc6ceea045031658d0b59af562369eae980b4370 (diff)
downloadlinux-2.6.34-ux500-b63be8d7beda7fe5879559be6f70f8e1c93109e4.tar.gz
perf top: Improve the autosizing of column lenghts
When profiling C++ workloads the symbol name length can be really big, so cap it before it garbles the result. This builds upon the autosizing already present where we choose to use the short, basename of DSOs instead of its long, full pathname. Reported-by: Pavel Krauz <krauz@cngroup.cz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1268676230-9261-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-top.c13
-rw-r--r--tools/perf/util/symbol.c18
-rw-r--r--tools/perf/util/symbol.h3
3 files changed, 24 insertions, 10 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0b719e3dde0..8364c8aba19 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -455,7 +455,7 @@ static void print_sym_table(void)
struct sym_entry *syme, *n;
struct rb_root tmp = RB_ROOT;
struct rb_node *nd;
- int sym_width = 0, dso_width = 0, max_dso_width;
+ int sym_width = 0, dso_width = 0, dso_short_width;
const int win_width = winsize.ws_col - 1;
samples = userspace_samples = 0;
@@ -545,15 +545,20 @@ static void print_sym_table(void)
if (syme->map->dso->long_name_len > dso_width)
dso_width = syme->map->dso->long_name_len;
+ if (syme->map->dso->short_name_len > dso_short_width)
+ dso_short_width = syme->map->dso->short_name_len;
+
if (syme->name_len > sym_width)
sym_width = syme->name_len;
}
printed = 0;
- max_dso_width = winsize.ws_col - sym_width - 29;
- if (dso_width > max_dso_width)
- dso_width = max_dso_width;
+ if (sym_width + dso_width > winsize.ws_col - 29) {
+ dso_width = dso_short_width;
+ if (sym_width + dso_width > winsize.ws_col - 29)
+ sym_width = winsize.ws_col - dso_width - 29;
+ }
putchar('\n');
if (nr_counters == 1)
printf(" samples pcnt");
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 323c0aea0a9..c458c4a371d 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -163,9 +163,17 @@ void dso__set_long_name(struct dso *self, char *name)
self->long_name_len = strlen(name);
}
+static void dso__set_short_name(struct dso *self, const char *name)
+{
+ if (name == NULL)
+ return;
+ self->short_name = name;
+ self->short_name_len = strlen(name);
+}
+
static void dso__set_basename(struct dso *self)
{
- self->short_name = basename(self->long_name);
+ dso__set_short_name(self, basename(self->long_name));
}
struct dso *dso__new(const char *name)
@@ -176,7 +184,7 @@ struct dso *dso__new(const char *name)
int i;
strcpy(self->name, name);
dso__set_long_name(self, self->name);
- self->short_name = self->name;
+ dso__set_short_name(self, self->name);
for (i = 0; i < MAP__NR_TYPES; ++i)
self->symbols[i] = self->symbol_names[i] = RB_ROOT;
self->slen_calculated = 0;
@@ -897,7 +905,6 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
struct map *curr_map = map;
struct dso *curr_dso = self;
- size_t dso_name_len = strlen(self->short_name);
Elf_Data *symstrs, *secstrs;
uint32_t nr_syms;
int err = -1;
@@ -987,7 +994,8 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
char dso_name[PATH_MAX];
if (strcmp(section_name,
- curr_dso->short_name + dso_name_len) == 0)
+ (curr_dso->short_name +
+ self->short_name_len)) == 0)
goto new_symbol;
if (strcmp(section_name, ".text") == 0) {
@@ -1782,7 +1790,7 @@ struct dso *dso__new_kernel(const char *name)
struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
if (self != NULL) {
- self->short_name = "[kernel]";
+ dso__set_short_name(self, "[kernel]");
self->kernel = 1;
}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 280dadd32a0..f30a3742891 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -110,9 +110,10 @@ struct dso {
u8 sorted_by_name;
u8 loaded;
u8 build_id[BUILD_ID_SIZE];
- u16 long_name_len;
const char *short_name;
char *long_name;
+ u16 long_name_len;
+ u16 short_name_len;
char name[0];
};