linux-kernel - [PATCH] perf test: Speed up test case 70 annotate basic tests

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Date: Fri,  7 Jun 2024 07:43:52 +0200
From: Thomas Richter <tmricht@...ux.ibm.com>
To: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org, namhyung@...nel.org
Cc: svens@...ux.ibm.com, gor@...ux.ibm.com, sumanthk@...ux.ibm.com,
        hca@...ux.ibm.com, Thomas Richter <tmricht@...ux.ibm.com>
Subject: [PATCH] perf test: Speed up test case 70 annotate basic tests

On some s390 linux machine (mostly older models) and with debug
packages installed, the test case 'perf annotate basic tests' runs
for some longer time.
Speed up the test and save the output of command perf annotate
in a temporary file. This is used to perform pattern matching via
grep command. This saves on invocation of perf annotate which
runs for some time.

Output before:
 # time bash -x tests/shell/annotate.sh >/dev/null 2>&1; echo EXIT CODE $?

 real   4m35.543s
 user   3m19.442s
 sys    1m14.322s
 EXIT CODE 0
 #
Output after:
 # time bash -x tests/shell/annotate.sh >/dev/null 2>&1; echo EXIT CODE $?

 real   2m2.881s
 user   1m30.980s
 sys    0m30.684s
 EXIT CODE 0
 #

Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
---
 tools/perf/tests/shell/annotate.sh | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/shell/annotate.sh b/tools/perf/tests/shell/annotate.sh
index 1db1e8113d99..b072d9b97387 100755
--- a/tools/perf/tests/shell/annotate.sh
+++ b/tools/perf/tests/shell/annotate.sh
@@ -15,12 +15,13 @@ skip_test_missing_symbol ${testsym}
 
 err=0
 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+perfout=$(mktemp /tmp/__perf_test.perf.out.XXXXX)
 testprog="perf test -w noploop"
 # disassembly format: "percent : offset: instruction (operands ...)"
 disasm_regex="[0-9]*\.[0-9]* *: *\w*: *\w*"
 
 cleanup() {
-  rm -rf "${perfdata}"
+  rm -rf "${perfdata}" "${perfout}"
   rm -rf "${perfdata}".old
 
   trap - EXIT TERM INT
@@ -41,8 +42,11 @@ test_basic() {
     return
   fi
 
+  # Generate the annotated output file
+  perf annotate -i "${perfdata}" --stdio 2> /dev/null > "${perfout}"
+
   # check if it has the target symbol
-  if ! perf annotate -i "${perfdata}" 2> /dev/null | grep "${testsym}"
+  if ! grep "${testsym}" "${perfout}"
   then
     echo "Basic annotate [Failed: missing target symbol]"
     err=1
@@ -50,7 +54,7 @@ test_basic() {
   fi
 
   # check if it has the disassembly lines
-  if ! perf annotate -i "${perfdata}" 2> /dev/null | grep "${disasm_regex}"
+  if ! grep "${disasm_regex}" "${perfout}"
   then
     echo "Basic annotate [Failed: missing disasm output from default disassembler]"
     err=1
-- 
2.45.1