[PATCH 02/41] perf intel-pt: Fix itrace defaults for perf script

Arnaldo Carvalho de Melo
2019-05-29T13:36:29Z

From: Adrian Hunter <adrian.hunter@intel.com>

Commit 4eb068157121 ("perf script: Make itrace script default to all
calls") does not work because 'use_browser' is being used to determine
whether to default to periodic sampling (i.e. better for perf report).
The result is that nothing but CBR events display for perf script when
no --itrace option is specified.

Fix by using 'default_no_sample' and 'inject' instead.

Example:

Before:

$ perf record -e intel_pt/cyc/u ls
$ perf script > cmp1.txt
$ perf script --itrace=cepwx > cmp2.txt
$ diff -sq cmp1.txt cmp2.txt
Files cmp1.txt and cmp2.txt differ

After:

$ perf script > cmp1.txt
$ perf script --itrace=cepwx > cmp2.txt
$ diff -sq cmp1.txt cmp2.txt
Files cmp1.txt and cmp2.txt are identical

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org # v4.20+
Fixes: 90e457f7be08 ("perf tools: Add Intel PT support")
Link: http://lkml.kernel.org/r/20190520113728.14389-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/intel-pt.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 6d288237887b..03b1da6d1da4 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -2588,7 +2588,8 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
} else {
itrace_synth_opts__set_default(&pt->synth_opts,
session->itrace_synth_opts->default_no_sample);
- if (use_browser != -1) {
+ if (!session->itrace_synth_opts->default_no_sample &&
+ !session->itrace_synth_opts->inject) {
pt->synth_opts.branches = false;
pt->synth_opts.callchain = true;
}
--
2.20.1