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Groups > linux.kernel > #1253855
| From | Arnaldo Carvalho de Melo <acme@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled |
| Date | 2015-10-22 16:20 +0200 |
| Message-ID | <qmoSL-4U2-21@gated-at.bofh.it> (permalink) |
| References | <qmhxU-2nM-7@gated-at.bofh.it> <qmhxU-2nM-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Em Thu, Oct 22, 2015 at 03:28:50PM +0900, Namhyung Kim escreveu:
> +++ 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
> };
So, this isn't a revert of the previous default change, i.e. previously
we used CHAIN_GRAPH_REL, should we keep CHAIN_GRAPH_ABS + callee?
Also you forgot to fix the docs to mention this new default, I did it
and the resulting patch, still with GRAPH_ABS follows:
From fd2dcde26d09b34fccc3c164d9fc36e662c21fc4 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Thu, 22 Oct 2015 16:45:46 +0900
Subject: [PATCH 1/1] perf tools: Defaults to 'caller' callchain order only if
--children is enabled
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 callee order.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Chandler Carruth <chandlerc@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1445499946-29817-1-git-send-email-namhyung@kernel.org
[ Update 'perf report' man page ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-report.txt | 2 +-
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 +-
6 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index e4fdeeb51123..4ae1621f1def 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -192,7 +192,7 @@ OPTIONS
when available. Usually more convenient to use --branch-history
for this.
- Default: graph,0.5,caller
+ Default: graph,0.5,callee
--children::
Accumulate callchain of children to parent entry so that then can
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3b23b25d1589..a554906a3e03 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -808,6 +808,8 @@ 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 6f641fd68296..be42e6eb6805 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1288,6 +1288,9 @@ 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 773fe13ce627..a8ed80f77ff3 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 acee2b3cd801..0e96496567c5 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -63,6 +63,7 @@ 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
};
--
2.1.0
--
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[RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Namhyung Kim <namhyung@kernel.org> - 2015-10-22 08:30 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Ingo Molnar <mingo@kernel.org> - 2015-10-22 09:40 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Namhyung Kim <namhyung@kernel.org> - 2015-10-22 09:40 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Brendan Gregg <brendan.d.gregg@gmail.com> - 2015-10-22 11:50 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-22 16:10 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Frederic Weisbecker <fweisbec@gmail.com> - 2015-10-22 14:30 +0200
[RFC/PATCH RESEND 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Namhyung Kim <namhyung@kernel.org> - 2015-10-22 09:50 +0200
Re: [RFC/PATCH RESEND 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-22 20:40 +0200
[tip:perf/core] perf tools: Defaults to 'caller' callchain order only if --children is enabled tip-bot for Namhyung Kim <tipbot@zytor.com> - 2015-10-23 10:40 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Frederic Weisbecker <fweisbec@gmail.com> - 2015-10-22 14:20 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-22 16:20 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Namhyung Kim <namhyung@kernel.org> - 2015-10-22 16:30 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-22 16:40 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Namhyung Kim <namhyung@kernel.org> - 2015-10-22 18:00 +0200
Re: [RFC/PATCH 3/3] perf tools: Defaults to 'caller' callchain order only if --children is enabled Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-22 18:30 +0200
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