perf tests: Add daemon reconfig test

Add a test for daemon reconfiguration. The test changes the
configuration file and checks that the session is changed properly.

Committer testing:

  [root@five ~]# perf test daemon
  76: daemon operations                                               : Ok
  [root@five ~]# time perf test daemon
  76: daemon operations                                               : Ok

  real	0m6.055s
  user	0m0.174s
  sys	0m0.147s
  [root@five ~]# time perf test -v daemon
  76: daemon operations                                               :
  --- start ---
  test child forked, pid 786863
  test daemon list
  test daemon reconfig
  test child finished with 0
  ---- end ----
  daemon operations: Ok

  real	0m6.127s
  user	0m0.222s
  sys	0m0.165s
  [root@five ~]#

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-21-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/shell/daemon.sh b/tools/perf/tests/shell/daemon.sh
index 874e1fd..90a6e8c 100755 (executable)
--- a/tools/perf/tests/shell/daemon.sh
+++ b/tools/perf/tests/shell/daemon.sh
@@ -177,8 +177,127 @@ EOF
        rm -f ${config}
 }
 
+test_reconfig()
+{
+       echo "test daemon reconfig"
+
+       local config=$(mktemp /tmp/perf.daemon.config.XXX)
+       local base=$(mktemp -d /tmp/perf.daemon.base.XXX)
+
+       # prepare config
+       cat <<EOF > ${config}
+[daemon]
+base=BASE
+
+[session-size]
+run = -e cpu-clock
+
+[session-time]
+run = -e task-clock
+EOF
+
+       sed -i -e "s|BASE|${base}|" ${config}
+
+       # start daemon
+       daemon_start ${config} size
+
+       # check 2nd session
+       # pid:time:-e task-clock:base/time:base/time/output:base/time/control:base/time/ack:0
+       local line=`perf daemon --config ${config} -x: | head -3 | tail -1`
+       check_line_other "${line}" time "-e task-clock" ${base}/session-time \
+                        ${base}/session-time/output ${base}/session-time/control ${base}/session-time/ack "0"
+       local pid=`echo "${line}" | awk 'BEGIN { FS = ":" } ; { print $1 }'`
+
+       # prepare new config
+       local config_new=${config}.new
+       cat <<EOF > ${config_new}
+[daemon]
+base=BASE
+
+[session-size]
+run = -e cpu-clock
+
+[session-time]
+run = -e cpu-clock
+EOF
+
+       # TEST 1 - change config
+
+       sed -i -e "s|BASE|${base}|" ${config_new}
+       cp ${config_new} ${config}
+
+       # wait for old session to finish
+       tail --pid=${pid} -f /dev/null
+
+       # wait for new one to start
+       local state="FAIL"
+       while [ "${state}" != "OK" ]; do
+               state=`perf daemon ping --config ${config} --session time | awk '{ print $1 }'`
+       done
+
+       # check reconfigured 2nd session
+       # pid:time:-e task-clock:base/time:base/time/output:base/time/control:base/time/ack:0
+       local line=`perf daemon --config ${config} -x: | head -3 | tail -1`
+       check_line_other "${line}" time "-e cpu-clock" ${base}/session-time \
+                        ${base}/session-time/output ${base}/session-time/control ${base}/session-time/ack "0"
+
+       # TEST 2 - empty config
+
+       local config_empty=${config}.empty
+       cat <<EOF > ${config_empty}
+[daemon]
+base=BASE
+EOF
+
+       # change config
+       sed -i -e "s|BASE|${base}|" ${config_empty}
+       cp ${config_empty} ${config}
+
+       # wait for sessions to finish
+       local state="OK"
+       while [ "${state}" != "FAIL" ]; do
+               state=`perf daemon ping --config ${config} --session time | awk '{ print $1 }'`
+       done
+
+       local state="OK"
+       while [ "${state}" != "FAIL" ]; do
+               state=`perf daemon ping --config ${config} --session size | awk '{ print $1 }'`
+       done
+
+       local one=`perf daemon --config ${config} -x: | wc -l`
+
+       if [ ${one} -ne "1" ]; then
+               echo "FAILED: wrong list output"
+               error=1
+       fi
+
+       # TEST 3 - config again
+
+       cp ${config_new} ${config}
+
+       # wait for size to start
+       local state="FAIL"
+       while [ "${state}" != "OK" ]; do
+               state=`perf daemon ping --config ${config} --session size | awk '{ print $1 }'`
+       done
+
+       # wait for time to start
+       local state="FAIL"
+       while [ "${state}" != "OK" ]; do
+               state=`perf daemon ping --config ${config} --session time | awk '{ print $1 }'`
+       done
+
+       # stop daemon
+       daemon_exit ${base} ${config}
+
+       rm -rf ${base}
+       rm -f ${config}
+       rm -f ${config_new}
+       rm -f ${config_empty}
+}
 error=0
 
 test_list
+test_reconfig
 
 exit ${error}