linux-kernel - [PATCH V3 9/9] perf test: Add new test cases for the branch counter feature

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Message-Id: <20240813160208.2493643-10-kan.liang@linux.intel.com>
Date: Tue, 13 Aug 2024 09:02:08 -0700
From: kan.liang@...ux.intel.com
To: acme@...nel.org,
	namhyung@...nel.org,
	irogers@...gle.com,
	peterz@...radead.org,
	mingo@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org
Cc: adrian.hunter@...el.com,
	ak@...ux.intel.com,
	eranian@...gle.com,
	Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V3 9/9] perf test: Add new test cases for the branch counter feature

From: Kan Liang <kan.liang@...ux.intel.com>

Enhance the test case for the branch counter feature.

Now, the test verifies
- The new filter can be successfully applied on the supported platforms.
- The counter value can be outputted via the perf report -D
- The counter value and the abbr name can be outputted via the
  perf script (New)

Acked-by: Namhyung Kim <namhyung@...nel.org>
Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 tools/perf/tests/shell/record.sh | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index 3d1a7759a7b2..7964ebd9007d 100755
--- a/tools/perf/tests/shell/record.sh
+++ b/tools/perf/tests/shell/record.sh
@@ -21,6 +21,7 @@ testprog="perf test -w thloop"
 cpu_pmu_dir="/sys/bus/event_source/devices/cpu*"
 br_cntr_file="/caps/branch_counter_nr"
 br_cntr_output="branch stack counters"
+br_cntr_script_output="br_cntr: A"
 
 cleanup() {
   rm -rf "${perfdata}"
@@ -165,7 +166,7 @@ test_workload() {
 }
 
 test_branch_counter() {
-  echo "Basic branch counter test"
+  echo "Branch counter test"
   # Check if the branch counter feature is supported
   for dir in $cpu_pmu_dir
   do
@@ -175,19 +176,25 @@ test_branch_counter() {
       return
     fi
   done
-  if ! perf record -o "${perfdata}" -j any,counter ${testprog} 2> /dev/null
+  if ! perf record -o "${perfdata}" -e "{branches:p,instructions}" -j any,counter ${testprog} 2> /dev/null
   then
-    echo "Basic branch counter test [Failed record]"
+    echo "Branch counter record test [Failed record]"
     err=1
     return
   fi
   if ! perf report -i "${perfdata}" -D -q | grep -q "$br_cntr_output"
   then
-    echo "Basic branch record test [Failed missing output]"
+    echo "Branch counter report test [Failed missing output]"
     err=1
     return
   fi
-  echo "Basic branch counter test [Success]"
+  if ! perf script -i "${perfdata}" -F +brstackinsn,+brcntr | grep -q "$br_cntr_script_output"
+  then
+    echo " Branch counter script test [Failed missing output]"
+    err=1
+    return
+  fi
+  echo "Branch counter test [Success]"
 }
 
 test_per_thread
-- 
2.38.1