[PATCH 3/3] perf test: Fix record tests on hybrid machines

[Namhyung Kim]

Currently the leader sampling test looks for "cycles:" string to match
the event and retrieve the value before the event name.  But it won't
work on hybrid systems as the event name is different like below.

  $ perf script | grep -m 10 brstack
      perf 3322152 1873980.978431:     625379 cpu_atom/cycles/:      558200cc40cf brstack_bench+0x31 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978431:     625379 cpu_atom/cycles/:      558200cc40cf brstack_bench+0x31 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978598:     612177 cpu_atom/cycles/:      558200cc4082 brstack_foo+0x17 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978598:     612177 cpu_atom/cycles/:      558200cc4082 brstack_foo+0x17 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978762:     591859 cpu_atom/cycles/:      558200cc403d brstack_bar+0x0 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978762:     591859 cpu_atom/cycles/:      558200cc403d brstack_bar+0x0 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978948:     628505 cpu_atom/cycles/:      558200cc403e brstack_bar+0x1 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.978948:     628505 cpu_atom/cycles/:      558200cc403e brstack_bar+0x1 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.979146:     669816 cpu_atom/cycles/:      558200cc40e5 brstack_bench+0x47 (/home/namhyung/project/linux/tools/perf/perf)
      perf 3322152 1873980.979146:     669816 cpu_atom/cycles/:      558200cc40e5 brstack_bench+0x47 (/home/namhyung/project/linux/tools/perf/perf)

But we can control the output format of perf script using -F option.  So
we knows where the period is in the output.  To filter by symbol name,
"ip" and "sym" fields are required as well.

  $ perf script -F period,ip,sym | grep -m 10 brstack
      625379      558200cc40cf brstack_bench
      625379      558200cc40cf brstack_bench
      612177      558200cc4082 brstack_foo
      612177      558200cc4082 brstack_foo
      591859      558200cc403d brstack_bar
      591859      558200cc403d brstack_bar
      628505      558200cc403e brstack_bar
      628505      558200cc403e brstack_bar
      669816      558200cc40e5 brstack_bench
      669816      558200cc40e5 brstack_bench

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 tools/perf/tests/shell/record.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
index 04df35b30b0c15fd..fa8d17e389a0116d 100755
--- a/tools/perf/tests/shell/record.sh
+++ b/tools/perf/tests/shell/record.sh
@@ -537,7 +537,7 @@ test_leader_sampling() {
     err=1
     return
   fi
-  perf script -i "${perfdata}" | grep brstack > $script_output
+  perf script -i "${perfdata}" -F period,ip,sym | grep brstack > $script_output
   # Check if the two instruction counts are equal in each record.
   # However, the throttling code doesn't consider event grouping. During throttling, only the
   # leader is stopped, causing the slave's counts significantly higher. To temporarily solve this,
@@ -549,7 +549,7 @@ test_leader_sampling() {
   tolerance_rate=0.8
   while IFS= read -r line
   do
-    cycles=$(echo $line | awk '{for(i=1;i<=NF;i++) if($i=="cycles:") print $(i-1)}')
+    cycles=$(echo $line | awk '{ print $1 }')
     if [ $(($index%2)) -ne 0 ]
     then
       if (( $(bc <<< "scale=4; r = ${cycles} / ${prev_cycles}; r >= 0.99 && r <= 1.01") ))
-- 
2.56.0.rc1.310.g51773c2048-goog