diff options
author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-07-02 15:58:21 (GMT) |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-07-02 18:47:15 (GMT) |
commit | 4eb3e4788b8a5e220a0aeb590f88c28850726ebe (patch) | |
tree | 537392177078684b87197d358cf2104e90ec6d66 /tools/perf/builtin-report.c | |
parent | 5a4b181721375700124513cdd9f97056e1c66675 (diff) | |
download | linux-fsl-qoriq-4eb3e4788b8a5e220a0aeb590f88c28850726ebe.tar.xz |
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/builtin-report.c')
-rw-r--r-- | tools/perf/builtin-report.c | 141 |
1 files changed, 134 insertions, 7 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index b44476c..0ca4638 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -59,6 +59,7 @@ static regex_t parent_regex; static int exclude_other = 1; static int callchain; +static enum chain_mode callchain_mode; static u64 sample_type; @@ -787,8 +788,103 @@ hist_entry__collapse(struct hist_entry *left, struct hist_entry *right) return cmp; } +static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask) +{ + int i; + size_t ret = 0; + + ret += fprintf(fp, "%s", " "); + + for (i = 0; i < depth; i++) + if (depth_mask & (1 << i)) + ret += fprintf(fp, "| "); + else + ret += fprintf(fp, " "); + + ret += fprintf(fp, "\n"); + + return ret; +} static size_t -callchain__fprintf(FILE *fp, struct callchain_node *self, u64 total_samples) +ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain, int depth, + int depth_mask, int count, u64 total_samples, + int hits) +{ + int i; + size_t ret = 0; + + ret += fprintf(fp, "%s", " "); + for (i = 0; i < depth; i++) { + if (depth_mask & (1 << i)) + ret += fprintf(fp, "|"); + else + ret += fprintf(fp, " "); + if (!count && i == depth - 1) { + double percent; + + percent = hits * 100.0 / total_samples; + ret += fprintf(fp, "--%2.2f%%-- ", percent); + } else + ret += fprintf(fp, "%s", " "); + } + if (chain->sym) + ret += fprintf(fp, "%s\n", chain->sym->name); + else + ret += fprintf(fp, "%p\n", (void *)(long)chain->ip); + + return ret; +} + +static size_t +callchain__fprintf_graph(FILE *fp, struct callchain_node *self, + u64 total_samples, int depth, int depth_mask) +{ + struct rb_node *node, *next; + struct callchain_node *child; + struct callchain_list *chain; + int new_depth_mask = depth_mask; + size_t ret = 0; + int i; + + node = rb_first(&self->rb_root); + while (node) { + child = rb_entry(node, struct callchain_node, rb_node); + + /* + * The depth mask manages the output of pipes that show + * the depth. We don't want to keep the pipes of the current + * level for the last child of this depth + */ + next = rb_next(node); + if (!next) + new_depth_mask &= ~(1 << (depth - 1)); + + /* + * But we keep the older depth mask for the line seperator + * to keep the level link until we reach the last child + */ + ret += ipchain__fprintf_graph_line(fp, depth, depth_mask); + i = 0; + list_for_each_entry(chain, &child->val, list) { + if (chain->ip >= PERF_CONTEXT_MAX) + continue; + ret += ipchain__fprintf_graph(fp, chain, depth, + new_depth_mask, i++, + total_samples, + child->cumul_hit); + } + ret += callchain__fprintf_graph(fp, child, total_samples, + depth + 1, + new_depth_mask | (1 << depth)); + node = next; + } + + return ret; +} + +static size_t +callchain__fprintf_flat(FILE *fp, struct callchain_node *self, + u64 total_samples) { struct callchain_list *chain; size_t ret = 0; @@ -796,7 +892,7 @@ callchain__fprintf(FILE *fp, struct callchain_node *self, u64 total_samples) if (!self) return 0; - ret += callchain__fprintf(fp, self->parent, total_samples); + ret += callchain__fprintf_flat(fp, self->parent, total_samples); list_for_each_entry(chain, &self->val, list) { @@ -826,8 +922,13 @@ hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self, chain = rb_entry(rb_node, struct callchain_node, rb_node); percent = chain->hit * 100.0 / total_samples; - ret += fprintf(fp, " %6.2f%%\n", percent); - ret += callchain__fprintf(fp, chain, total_samples); + if (callchain_mode == FLAT) { + ret += fprintf(fp, " %6.2f%%\n", percent); + ret += callchain__fprintf_flat(fp, chain, total_samples); + } else if (callchain_mode == GRAPH) { + ret += callchain__fprintf_graph(fp, chain, + total_samples, 1, 1); + } ret += fprintf(fp, "\n"); rb_node = rb_next(rb_node); } @@ -1129,8 +1230,12 @@ static void output__insert_entry(struct hist_entry *he) struct rb_node *parent = NULL; struct hist_entry *iter; - if (callchain) - sort_chain_to_rbtree(&he->sorted_chain, &he->callchain); + if (callchain) { + if (callchain_mode == FLAT) + sort_chain_flat(&he->sorted_chain, &he->callchain); + else if (callchain_mode == GRAPH) + sort_chain_graph(&he->sorted_chain, &he->callchain); + } while (*p != NULL) { parent = *p; @@ -1702,6 +1807,26 @@ done: return rc; } +static int +parse_callchain_opt(const struct option *opt __used, const char *arg, + int unset __used) +{ + callchain = 1; + + if (!arg) + return 0; + + if (!strncmp(arg, "graph", strlen(arg))) + callchain_mode = GRAPH; + + else if (!strncmp(arg, "flat", strlen(arg))) + callchain_mode = FLAT; + else + return -1; + + return 0; +} + static const char * const report_usage[] = { "perf report [<options>] <command>", NULL @@ -1725,7 +1850,9 @@ static const struct option options[] = { "regex filter to identify parent, see: '--sort parent'"), OPT_BOOLEAN('x', "exclude-other", &exclude_other, "Only display entries with parent-match"), - OPT_BOOLEAN('c', "callchain", &callchain, "Display callchains"), + OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type", + "Display callchains with output_type: flat, graph. " + "Default to flat", &parse_callchain_opt, "flat"), OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]", "only consider symbols in these dsos"), OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]", |