diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-09-20 15:00:44 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-09-20 16:10:25 +0200 |
| commit | ff645daf30cafb6fa74bee9a73733700bac2aff7 (patch) | |
| tree | 01fb6be715bdc73bf76e79d05a4cff4e4a18c5ce | |
| parent | perf script: Enhance sample flags for trace begin / end (diff) | |
| download | linux-ff645daf30cafb6fa74bee9a73733700bac2aff7.tar.xz linux-ff645daf30cafb6fa74bee9a73733700bac2aff7.zip | |
perf db-export: Add trace begin / end branch type variants
Add branch types to cover different combinations with "trace begin" or
"trace end".
Previously, the Intel PT decoder would indicate begin / end by a branch
from / to zero. That hides useful information, in particular when a
trace ends with a call. Before remedying that, prepare the database
export to export branch types with more combinations that include trace
begin / end. In those cases extend the descriptions to include 'trace
begin' and 'trace end' separately.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20180920130048.31432-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/db-export.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c index 7123746edcf4..69fbb0a72d0c 100644 --- a/tools/perf/util/db-export.c +++ b/tools/perf/util/db-export.c @@ -463,6 +463,28 @@ int db_export__branch_types(struct db_export *dbe) if (err) break; } + + /* Add trace begin / end variants */ + for (i = 0; branch_types[i].name ; i++) { + const char *name = branch_types[i].name; + u32 type = branch_types[i].branch_type; + char buf[64]; + + if (type == PERF_IP_FLAG_BRANCH || + (type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END))) + continue; + + snprintf(buf, sizeof(buf), "trace begin / %s", name); + err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf); + if (err) + break; + + snprintf(buf, sizeof(buf), "%s / trace end", name); + err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf); + if (err) + break; + } + return err; } |