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authorFrederic Weisbecker <fweisbec@gmail.com>2009-07-02 17:58:21 +0200
committerIngo Molnar <mingo@elte.hu>2009-07-02 20:47:15 +0200
commit4eb3e4788b8a5e220a0aeb590f88c28850726ebe (patch)
tree537392177078684b87197d358cf2104e90ec6d66 /tools/perf/util
parent5a4b181721375700124513cdd9f97056e1c66675 (diff)
downloadop-kernel-dev-4eb3e4788b8a5e220a0aeb590f88c28850726ebe.zip
op-kernel-dev-4eb3e4788b8a5e220a0aeb590f88c28850726ebe.tar.gz
perf report: Add support for callchain graph output
Currently, the printing of callchains is done in a single vertical level, this is the "flat" mode: 8.25% [k] copy_user_generic_string 4.19% copy_user_generic_string generic_file_aio_read do_sync_read vfs_read sys_pread64 system_call_fastpath pread64 This patch introduces a new "graph" mode which provides a hierarchical output of factorized paths recursively sorted: 8.25% [k] copy_user_generic_string | |--4.31%-- generic_file_aio_read | do_sync_read | vfs_read | | | |--4.19%-- sys_pread64 | | system_call_fastpath | | pread64 | | | --0.12%-- sys_read | system_call_fastpath | __read | |--3.24%-- generic_file_buffered_write | __generic_file_aio_write_nolock | generic_file_aio_write | do_sync_write | reiserfs_file_write | vfs_write | | | |--3.14%-- sys_pwrite64 | | system_call_fastpath | | __pwrite64 | | | --0.10%-- sys_write [...] The command line has then changed. By providing the -c option, the callchain will output in the flat mode by default. But you can override it: perf report -c graph or perf report -c flat You can also pass the abreviated mode: perf report -c g or perf report -c gra will both make use of the graph mode. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Anton Blanchard <anton@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1246550301-8954-3-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/callchain.c51
-rw-r--r--tools/perf/util/callchain.h11
2 files changed, 51 insertions, 11 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 3c4a91f..a9873aa 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -19,9 +19,9 @@
#define chain_for_each_child(child, parent) \
list_for_each_entry(child, &parent->children, brothers)
-
static void
-rb_insert_callchain(struct rb_root *root, struct callchain_node *chain)
+rb_insert_callchain(struct rb_root *root, struct callchain_node *chain,
+ enum chain_mode mode)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
@@ -31,10 +31,22 @@ rb_insert_callchain(struct rb_root *root, struct callchain_node *chain)
parent = *p;
rnode = rb_entry(parent, struct callchain_node, rb_node);
- if (rnode->hit < chain->hit)
- p = &(*p)->rb_left;
- else
- p = &(*p)->rb_right;
+ switch (mode) {
+ case FLAT:
+ if (rnode->hit < chain->hit)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ break;
+ case GRAPH:
+ if (rnode->cumul_hit < chain->cumul_hit)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ break;
+ default:
+ break;
+ }
}
rb_link_node(&chain->rb_node, parent, p);
@@ -45,15 +57,36 @@ rb_insert_callchain(struct rb_root *root, struct callchain_node *chain)
* Once we get every callchains from the stream, we can now
* sort them by hit
*/
-void sort_chain_to_rbtree(struct rb_root *rb_root, struct callchain_node *node)
+void sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node)
{
struct callchain_node *child;
chain_for_each_child(child, node)
- sort_chain_to_rbtree(rb_root, child);
+ sort_chain_flat(rb_root, child);
if (node->hit)
- rb_insert_callchain(rb_root, node);
+ rb_insert_callchain(rb_root, node, FLAT);
+}
+
+static void __sort_chain_graph(struct callchain_node *node)
+{
+ struct callchain_node *child;
+
+ node->rb_root = RB_ROOT;
+ node->cumul_hit = node->hit;
+
+ chain_for_each_child(child, node) {
+ __sort_chain_graph(child);
+ rb_insert_callchain(&node->rb_root, child, GRAPH);
+ node->cumul_hit += child->cumul_hit;
+ }
+}
+
+void
+sort_chain_graph(struct rb_root *rb_root, struct callchain_node *chain_root)
+{
+ __sort_chain_graph(chain_root);
+ rb_root->rb_node = chain_root->rb_root.rb_node;
}
/*
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index e9bd5e8..dfa5600 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -6,15 +6,21 @@
#include <linux/rbtree.h>
#include "symbol.h"
+enum chain_mode {
+ FLAT,
+ GRAPH
+};
struct callchain_node {
struct callchain_node *parent;
struct list_head brothers;
struct list_head children;
struct list_head val;
- struct rb_node rb_node;
+ struct rb_node rb_node; /* to sort nodes in an rbtree */
+ struct rb_root rb_root; /* sorted tree of children */
unsigned int val_nr;
u64 hit;
+ u64 cumul_hit; /* hit + hits of children */
};
struct callchain_list {
@@ -32,5 +38,6 @@ static inline void callchain_init(struct callchain_node *node)
void append_chain(struct callchain_node *root, struct ip_callchain *chain,
struct symbol **syms);
-void sort_chain_to_rbtree(struct rb_root *rb_root, struct callchain_node *node);
+void sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node);
+void sort_chain_graph(struct rb_root *rb_root, struct callchain_node *node);
#endif
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