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author | Namhyung Kim <namhyung@kernel.org> | 2015-05-14 00:03:26 +0900 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-14 10:05:22 -0300 |
commit | 4fd113b5ce803da0b8fa0494513bedfdf2feb483 (patch) | |
tree | 946dde4b5efa8ea3b282aee05f6c960a8fb29716 | |
parent | d4c537e6bf860c12262cb936eef663180d7a3d45 (diff) | |
download | linux-stable-4fd113b5ce803da0b8fa0494513bedfdf2feb483.tar.gz linux-stable-4fd113b5ce803da0b8fa0494513bedfdf2feb483.tar.bz2 linux-stable-4fd113b5ce803da0b8fa0494513bedfdf2feb483.zip |
perf report: Fix some option handling on --stdio
There's a bug that perf report sometimes ignore some options on --stdio
output. This bug is triggered only if a related config variable is set.
For example, let's assume we have a following config file.
$ cat ~/.perfconfig
[call-graph]
print-type = graph
[hist]
percentage = absolute
Then, following perf config will not honor some options.
$ perf record -ag sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.199 MB perf.data (77 samples) ]
$ perf report -g none --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
# Samples: 77 of event 'cycles'
# Event count (approx.): 25425383
#
# Overhead Command Shared Object Symbol
# ........ ............... ....................... ..............
#
16.34% swapper [kernel.vmlinux] [k] intel_idle
|
---intel_idle
cpuidle_enter_state
cpuidle_enter
cpu_startup_entry
...
With '-g none' option, it should not show callchains, but it still shows
callchains. However it works as expected on --tui output.
Similarly, '--percentage relative' option is not work and still shows a
absolute percentage values.
Looking at the source, I found that those setting were overwritten by
config variables when setup_pager() called. The setup_pager() is to
start a pager process so that it can manage long lines of output on the
stdio mode. But as it calls the perf_config() after parsing arguments,
the settings were overwritten regardless of command line options.
The reason it calls perf_config() is to find the 'pager_program' which
might be set by a config variable, I guess. However current perf code
does not provide the config variable for it, so it's just meaningless
IMHO. Eliminating the call makes the option working as expected.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Taeung Song <treeze.taeung@gmail.com>
Link: http://lkml.kernel.org/r/1431529406-6762-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/util/cache.h | 1 | ||||
-rw-r--r-- | tools/perf/util/environment.c | 1 | ||||
-rw-r--r-- | tools/perf/util/pager.c | 5 |
3 files changed, 0 insertions, 7 deletions
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h index fbcca21d66ab..c861373aaed3 100644 --- a/tools/perf/util/cache.h +++ b/tools/perf/util/cache.h @@ -30,7 +30,6 @@ extern const char *perf_config_dirname(const char *, const char *); /* pager.c */ extern void setup_pager(void); -extern const char *pager_program; extern int pager_in_use(void); extern int pager_use_color; diff --git a/tools/perf/util/environment.c b/tools/perf/util/environment.c index 275b0ee345f5..7405123692f1 100644 --- a/tools/perf/util/environment.c +++ b/tools/perf/util/environment.c @@ -5,5 +5,4 @@ */ #include "cache.h" -const char *pager_program; int pager_use_color = 1; diff --git a/tools/perf/util/pager.c b/tools/perf/util/pager.c index 31ee02d4e988..53ef006a951c 100644 --- a/tools/perf/util/pager.c +++ b/tools/perf/util/pager.c @@ -50,11 +50,6 @@ void setup_pager(void) if (!isatty(1)) return; - if (!pager) { - if (!pager_program) - perf_config(perf_default_config, NULL); - pager = pager_program; - } if (!pager) pager = getenv("PAGER"); if (!(pager || access("/usr/bin/pager", X_OK))) |