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authorFrederic Weisbecker <fweisbec@gmail.com>2009-07-05 07:39:21 +0200
committerIngo Molnar <mingo@elte.hu>2009-07-05 10:30:23 +0200
commit805d127d62472f17c7d79baa001a7651afe2fa47 (patch)
tree59dfdd2337190e168a007ba65cc25c7e5d8c0fda /tools/perf/util/callchain.h
parente05b876c222178bc6abcfa9f23d8311731691046 (diff)
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perf report: Add "Fractal" mode output - support callchains with relative overhead rate
The current callchain displays the overhead rates as absolute: relative to the total overhead. This patch provides relative overhead percentage, in which each branch of the callchain tree is a independant instrumentated object. This provides a 'fractal' view of the call-chain profile: each sub-graph looks like a profile in itself - relative to its parent. You can produce such output by using the "fractal" mode that you can abbreviate via f, fr, fra, frac, etc... ./perf report -s sym -c fractal Example: 8.46% [k] copy_user_generic_string | |--52.01%-- generic_file_aio_read | do_sync_read | vfs_read | | | |--97.20%-- sys_pread64 | | system_call_fastpath | | pread64 | | | --2.81%-- sys_read | system_call_fastpath | __read | |--39.85%-- generic_file_buffered_write | __generic_file_aio_write_nolock | generic_file_aio_write | do_sync_write | reiserfs_file_write | vfs_write | | | |--97.05%-- sys_pwrite64 | | system_call_fastpath | | __pwrite64 | | | --2.95%-- sys_write | system_call_fastpath | __write_nocancel [...] 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: Jens Axboe <jens.axboe@oracle.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1246772361-9960-5-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/callchain.h')
-rw-r--r--tools/perf/util/callchain.h21
1 files changed, 15 insertions, 6 deletions
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index f3e4776e743..7812122bea1 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -7,8 +7,9 @@
#include "symbol.h"
enum chain_mode {
- FLAT,
- GRAPH
+ CHAIN_FLAT,
+ CHAIN_GRAPH_ABS,
+ CHAIN_GRAPH_REL
};
struct callchain_node {
@@ -23,6 +24,17 @@ struct callchain_node {
u64 cumul_hit; /* hit + hits of children */
};
+struct callchain_param;
+
+typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_node *,
+ u64, struct callchain_param *);
+
+struct callchain_param {
+ enum chain_mode mode;
+ double min_percent;
+ sort_chain_func_t sort;
+};
+
struct callchain_list {
u64 ip;
struct symbol *sym;
@@ -36,10 +48,7 @@ static inline void callchain_init(struct callchain_node *node)
INIT_LIST_HEAD(&node->val);
}
+int register_callchain_param(struct callchain_param *param);
void append_chain(struct callchain_node *root, struct ip_callchain *chain,
struct symbol **syms);
-void sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node,
- u64 min_hit);
-void sort_chain_graph(struct rb_root *rb_root, struct callchain_node *node,
- u64 min_hit);
#endif