Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-17 05:45:20 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

perf report: Fix incorrectly added dimensions as switch perf data file

Browse Source 
We observed an issue that was some extra columns displayed after switching
perf data file in browser. The steps to reproduce:

1. perf record -a -e cycles,instructions -- sleep 3
2. perf report --group
3. In browser, we use hotkey 's' to switch to another perf.data
4. Now in browser, the extra columns 'Self' and 'Children' are displayed.

The issue is setup_sorting() executed again after repeat path, so dimensions
are added again.

This patch checks the last key returned from __cmd_report(). If it's
K_SWITCH_INPUT_DATA, skips the setup_sorting().

Fixes: ad0de0971b7f ("perf report: Enable the runtime switching of perf data file")
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191220013722.20592-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2019-12-20 09:37:19 +08:00 committed by Arnaldo Carvalho de Melo
parent f84ae29a61
commit 0feba17bd7
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
tools/perf/builtin-report.c
View File

@ -1076,6 +1076,7 @@ int cmd_report(int argc, const char **argv)
struct stat st;
bool has_br_stack = false;
int branch_mode = -1;
int last_key = 0;
bool branch_call_mode = false;
#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function,percent"
static const char report_callchain_help[] = "Display call graph (stack chain/backtrace):\n\n"
@ -1450,7 +1451,8 @@ repeat:
sort_order = sort_tmp;
}
if (setup_sorting(session->evlist) < 0) {
if ((last_key != K_SWITCH_INPUT_DATA) &&
(setup_sorting(session->evlist) < 0)) {
if (sort_order)
parse_options_usage(report_usage, options, "s", 1);
if (field_order)
@ -1530,6 +1532,7 @@ repeat:
ret = __cmd_report(&report);
if (ret == K_SWITCH_INPUT_DATA) {
perf_session__delete(session);
last_key = K_SWITCH_INPUT_DATA;
goto repeat;
} else
ret = 0;