From b38c49d8296b9eee1ffb6471853d542fd76de2fb Mon Sep 17 00:00:00 2001
From: Thomas Richter <tmricht@linux.ibm.com>
Date: Tue, 17 Sep 2024 10:57:06 +0200
Subject: [PATCH] perf/test: Speed up test case perf annotate basic tests

perf test 70 takes a long time. One culprit is the output of command
perf annotate. Per default enabled are
 - demangle symbol names
 - interleave source code with assembly code.
Disable demangle of symbols and abort the annotation
after the first 250 lines.

This speeds up the test case considerable, for example
on s390:

Output before:
 # time  perf test 70
 70: perf annotate basic tests             : Ok
 .....
 real   2m7.467s
 user   1m26.869s
 sys    0m34.086s
 #

 Output after:
 # time perf test 70
 70: perf annotate basic tests             : Ok

 real   0m3.341s
 user   0m1.606s
 sys    0m0.362s
 #

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: sumanthk@linux.ibm.com
Link: https://lore.kernel.org/r/20240917085706.249691-1-tmricht@linux.ibm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/tests/shell/annotate.sh | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/shell/annotate.sh b/tools/perf/tests/shell/annotate.sh
index 2ccf4f1d46b6..1590a37363de 100755
--- a/tools/perf/tests/shell/annotate.sh
+++ b/tools/perf/tests/shell/annotate.sh
@@ -44,7 +44,7 @@ test_basic() {
   fi
 
   # Generate the annotated output file
-  perf annotate -i "${perfdata}" --stdio 2> /dev/null > "${perfout}"
+  perf annotate --no-demangle -i "${perfdata}" --stdio 2> /dev/null | head -250 > "${perfout}"
 
   # check if it has the target symbol
   if ! grep "${testsym}" "${perfout}"
@@ -63,8 +63,8 @@ test_basic() {
   fi
 
   # check again with a target symbol name
-  if ! perf annotate -i "${perfdata}" "${testsym}" 2> /dev/null | \
-	  grep -m 3 "${disasm_regex}"
+  if ! perf annotate --no-demangle -i "${perfdata}" "${testsym}" 2> /dev/null | \
+	  head -250 | grep -m 3 "${disasm_regex}"
   then
     echo "Basic annotate [Failed: missing disasm output when specifying the target symbol]"
     err=1
@@ -72,8 +72,8 @@ test_basic() {
   fi
 
   # check one more with external objdump tool (forced by --objdump option)
-  if ! perf annotate -i "${perfdata}" --objdump=objdump 2> /dev/null | \
-	  grep -m 3 "${disasm_regex}"
+  if ! perf annotate --no-demangle -i "${perfdata}" --objdump=objdump 2> /dev/null | \
+	  head -250 | grep -m 3 "${disasm_regex}"
   then
     echo "Basic annotate [Failed: missing disasm output from non default disassembler (using --objdump)]"
     err=1
-- 
2.50.1