perf tools: Bind callchains to the first sort dimension column
Currently, the callchains are displayed using a constant left
margin. So depending on the current sort dimension
configuration, callchains may appear to be well attached to the
first sort dimension column field which is mostly the case,
except when the first dimension of sorting is done by comm,
because these are right aligned.
This patch binds the callchain to the first letter in the first
column, whatever type of column it is (dso, comm, symbol).
Before:
0.80% perf [k] __lock_acquire
__lock_acquire
lock_acquire
|
|--58.33%-- _spin_lock
| |
| |--28.57%-- inotify_should_send_event
| | fsnotify
| | __fsnotify_parent
After:
0.80% perf [k] __lock_acquire
__lock_acquire
lock_acquire
|
|--58.33%-- _spin_lock
| |
| |--28.57%-- inotify_should_send_event
| | fsnotify
| | __fsnotify_parent
Also, for clarity, we don't put anymore the callchain as is but:
- If we have a top level ancestor in the callchain, start it
with a first ascii hook.
Before:
0.80% perf [kernel] [k] __lock_acquire
__lock_acquire
lock_acquire
|
|--58.33%-- _spin_lock
| |
| |--28.57%-- inotify_should_send_event
| | fsnotify
[..] [..]
After:
0.80% perf [kernel] [k] __lock_acquire
|
--- __lock_acquire
lock_acquire
|
|--58.33%-- _spin_lock
| |
| |--28.57%-- inotify_should_send_event
| | fsnotify
[..] [..]
- Otherwise, if we have several top level ancestors, then
display these like we did before:
1.69% Xorg
|
|--21.21%-- vread_hpet
| 0x7fffd85b46fc
| 0x7fffd85b494d
| 0x7f4fafb4e54d
|
|--15.15%-- exaOffscreenAlloc
|
|--9.09%-- I830WaitLpRing
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
LKML-Reference: <1256246604-17156-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 60ced70..b490354 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -7,7 +7,8 @@
char *sort_order = default_sort_order;
int sort__need_collapse = 0;
int sort__has_parent = 0;
-int sort_by_sym_first;
+
+enum sort_type sort__first_dimension;
unsigned int dsos__col_width;
unsigned int comms__col_width;
@@ -266,9 +267,18 @@
sort__has_parent = 1;
}
- if (list_empty(&hist_entry__sort_list) &&
- !strcmp(sd->name, "symbol"))
- sort_by_sym_first = true;
+ if (list_empty(&hist_entry__sort_list)) {
+ if (!strcmp(sd->name, "pid"))
+ sort__first_dimension = SORT_PID;
+ else if (!strcmp(sd->name, "comm"))
+ sort__first_dimension = SORT_COMM;
+ else if (!strcmp(sd->name, "dso"))
+ sort__first_dimension = SORT_DSO;
+ else if (!strcmp(sd->name, "symbol"))
+ sort__first_dimension = SORT_SYM;
+ else if (!strcmp(sd->name, "parent"))
+ sort__first_dimension = SORT_PARENT;
+ }
list_add_tail(&sd->entry->list, &hist_entry__sort_list);
sd->taken = 1;
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 24c2b70..333e664 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -39,7 +39,7 @@
extern unsigned int dsos__col_width;
extern unsigned int comms__col_width;
extern unsigned int threads__col_width;
-extern int sort_by_sym_first;
+extern enum sort_type sort__first_dimension;
struct hist_entry {
struct rb_node rb_node;
@@ -54,6 +54,14 @@
struct rb_root sorted_chain;
};
+enum sort_type {
+ SORT_PID,
+ SORT_COMM,
+ SORT_DSO,
+ SORT_SYM,
+ SORT_PARENT
+};
+
/*
* configurable sorting bits
*/
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index f53fad7..8cb47f1 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -33,6 +33,17 @@
return self->comm ? 0 : -ENOMEM;
}
+int thread__comm_len(struct thread *self)
+{
+ if (!self->comm_len) {
+ if (!self->comm)
+ return 0;
+ self->comm_len = strlen(self->comm);
+ }
+
+ return self->comm_len;
+}
+
static size_t thread__fprintf(struct thread *self, FILE *fp)
{
struct rb_node *nd;
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 1abef3b..53addd7 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -12,9 +12,11 @@
pid_t pid;
char shortname[3];
char *comm;
+ int comm_len;
};
int thread__set_comm(struct thread *self, const char *comm);
+int thread__comm_len(struct thread *self);
struct thread *threads__findnew(pid_t pid);
struct thread *register_idle_thread(void);
void thread__insert_map(struct thread *self, struct map *map);