[RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled

From: Namhyung Kim
Date: Thu Oct 22 2015 - 02:29:35 EST


The caller callchain order is useful with --children option since it can
show 'overview' style output, but other commands which don't use
--children feature like 'perf script' or even 'perf report/top' without
--children are better to keep caller order.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx>
Cc: Chandler Carruth <chandlerc@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/builtin-report.c | 2 ++
tools/perf/builtin-top.c | 3 +++
tools/perf/util/callchain.c | 2 ++
tools/perf/util/callchain.h | 1 +
tools/perf/util/util.c | 2 +-
5 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 18a8c52d921e..545c51cef7f7 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -812,6 +812,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)

if (report.inverted_callchain)
callchain_param.order = ORDER_CALLER;
+ if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
+ callchain_param.order = ORDER_CALLER;

if (itrace_synth_opts.callchain &&
(int)itrace_synth_opts.callchain_sz > report.max_stack)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 1de381d3f29f..af849b1d7389 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1304,6 +1304,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
perf_hpp__cancel_cumulate();
}

+ if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
+ callchain_param.order = ORDER_CALLER;
+
symbol_conf.priv_size = sizeof(struct annotation);

symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 842be32899ee..735ad48e1858 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -51,10 +51,12 @@ static int parse_callchain_order(const char *value)
{
if (!strncmp(value, "caller", strlen(value))) {
callchain_param.order = ORDER_CALLER;
+ callchain_param.order_set = true;
return 0;
}
if (!strncmp(value, "callee", strlen(value))) {
callchain_param.order = ORDER_CALLEE;
+ callchain_param.order_set = true;
return 0;
}
return -1;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 836d59a001bc..aaf467c9ef2b 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -75,6 +75,7 @@ struct callchain_param {
double min_percent;
sort_chain_func_t sort;
enum chain_order order;
+ bool order_set;
enum chain_key key;
bool branch_callstack;
};
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index c1bf9ff210b0..cd12c25e4ea4 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -19,7 +19,7 @@
struct callchain_param callchain_param = {
.mode = CHAIN_GRAPH_ABS,
.min_percent = 0.5,
- .order = ORDER_CALLER,
+ .order = ORDER_CALLEE,
.key = CCKEY_FUNCTION
};

--
2.6.0

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