diff options
| author |   Frederic Weisbecker <fweisbec@gmail.com> | 2009-07-05 07:39:21 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-07-05 10:30:23 +0200 |
| commit | 805d127d62472f17c7d79baa001a7651afe2fa47 (patch) | |
| tree | 59dfdd2337190e168a007ba65cc25c7e5d8c0fda /tools/perf/util/callchain.h | |
| parent | perf_counter tools: callchains: Manage the cumul hits on the fly (diff) | |
| download | linux-dev-805d127d62472f17c7d79baa001a7651afe2fa47.tar.xz linux-dev-805d127d62472f17c7d79baa001a7651afe2fa47.zip | |
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.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index f3e4776e7430..7812122bea1d 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 |