perf test stat: Additional topdown grouping tests

Add a loop and helper function to avoid repetition, the loop uses
arrays so switch the shell to bash. Add additional topdown group tests
where a topdown event needs to be moved beyond others and the slots
event isn't first in the target group. This replicates issues that
occur on hybrid systems where the other events are for the cpu_atom
PMU. Test with both PMU and software events. Place the slots event
later in the event list.

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250307023906.1135613-5-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

1 files changed, 47 insertions, 36 deletions

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 68323d636fb7..8a100a7f2dc1 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # perf stat tests
 # SPDX-License-Identifier: GPL-2.0
 
@@ -67,43 +67,54 @@ test_topdown_groups() {
     echo "Topdown event group test [Skipped event parsing failed]"
     return
   fi
-  if perf stat -e '{slots,topdown-retiring}' true 2>&1 | grep -E -q "<not supported>"
-  then
-    echo "Topdown event group test [Failed events not supported]"
-    err=1
-    return
-  fi
-  if perf stat -e 'instructions,topdown-retiring,slots' true 2>&1 | grep -E -q "<not supported>"
-  then
-    echo "Topdown event group test [Failed slots not reordered first in no-group case]"
-    err=1
-    return
-  fi
-  if perf stat -e '{instructions,topdown-retiring,slots}' true 2>&1 | grep -E -q "<not supported>"
-  then
-    echo "Topdown event group test [Failed slots not reordered first in single group case]"
-    err=1
-    return
-  fi
-  if perf stat -e '{instructions,slots},topdown-retiring' true 2>&1 | grep -E -q "<not supported>"
-  then
-    echo "Topdown event group test [Failed topdown metrics event not move into slots group]"
-    err=1
-    return
-  fi
-  if perf stat -e '{instructions,slots},{topdown-retiring}' true 2>&1 | grep -E -q "<not supported>"
-  then
-    echo "Topdown event group test [Failed topdown metrics group not merge into slots group]"
-    err=1
-    return
-  fi
-  if perf stat -e '{instructions,r400,r8000}' true 2>&1 | grep -E -q "<not supported>"
+  td_err=0
+  do_topdown_group_test() {
+    events=$1
+    failure=$2
+    if perf stat -e "$events" true 2>&1 | grep -E -q "<not supported>"
+    then
+      echo "Topdown event group test [Failed $failure for '$events']"
+      td_err=1
+      return
+    fi
+  }
+  do_topdown_group_test "{slots,topdown-retiring}" "events not supported"
+  do_topdown_group_test "{instructions,r400,r8000}" "raw format slots not reordered first"
+  filler_events=("instructions" "cycles"
+                 "context-switches" "faults")
+  for ((i = 0; i < ${#filler_events[@]}; i+=2))
+  do
+    filler1=${filler_events[i]}
+    filler2=${filler_events[i+1]}
+    do_topdown_group_test "$filler1,topdown-retiring,slots" \
+      "slots not reordered first in no-group case"
+    do_topdown_group_test "slots,$filler1,topdown-retiring" \
+      "topdown metrics event not reordered in no-group case"
+    do_topdown_group_test "{$filler1,topdown-retiring,slots}" \
+      "slots not reordered first in single group case"
+    do_topdown_group_test "{$filler1,slots},topdown-retiring" \
+      "topdown metrics event not move into slots group"
+    do_topdown_group_test "topdown-retiring,{$filler1,slots}" \
+      "topdown metrics event not move into slots group last"
+    do_topdown_group_test "{$filler1,slots},{topdown-retiring}" \
+      "topdown metrics group not merge into slots group"
+    do_topdown_group_test "{topdown-retiring},{$filler1,slots}" \
+      "topdown metrics group not merge into slots group last"
+    do_topdown_group_test "{$filler1,slots},$filler2,topdown-retiring" \
+      "non-adjacent topdown metrics group not move into slots group"
+    do_topdown_group_test "$filler2,topdown-retiring,{$filler1,slots}" \
+      "non-adjacent topdown metrics group not move into slots group last"
+    do_topdown_group_test "{$filler1,slots},{$filler2,topdown-retiring}" \
+      "metrics group not merge into slots group"
+    do_topdown_group_test "{$filler1,topdown-retiring},{$filler2,slots}" \
+      "metrics group not merge into slots group last"
+  done
+  if test "$td_err" -eq 0
   then
-    echo "Topdown event group test [Failed raw format slots not reordered first]"
-    err=1
-    return
+    echo "Topdown event group test [Success]"
+  else
+    err="$td_err"
   fi
-  echo "Topdown event group test [Success]"
 }
 
 test_topdown_weak_groups() {