linux-kernel - Re: [PATCH v2] selftests: ftrace: Allow some tests to be run in a tracing instance

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Date:   Fri, 21 Apr 2017 23:22:28 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Shuah Khan <shuah@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v2] selftests: ftrace: Allow some tests to be run in a
 tracing instance

On Sat, 22 Apr 2017 08:00:36 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> 
> BTW, this seems too complecated (with many similar variables).

I'm use to complicated ;-)

> I think we just need following patch, if we run the tests which
> have "instance" flag twice on top-level and an instance.
> (If you'd like to run those tests only on instance, we need
>  just one more line in the main loop ;-) )
> 
> -----------
> diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests
> index 52e3c4d..bdb10e6 100755
> --- a/tools/testing/selftests/ftrace/ftracetest
> +++ b/tools/testing/selftests/ftrace/ftracetest
> @@ -152,6 +152,10 @@ testcase() { # testfile
>    prlog -n "[$CASENO]$desc"
>  }
>  
> +test_on_instance() { # testfile
> +  grep "^#[ \t]*flag:.*instance" $1
> +}
> +
>  eval_result() { # sigval
>    case $1 in
>      $PASS)
> @@ -266,6 +270,16 @@ for t in $TEST_CASES; do
>    run_test $t
>  done
>  
> +# Test on instance loop
> +for t in $TEST_CASES; do
> +  test_on_instance $t || continue
> +  SAVED_TRACING_DIR=$TRACING_DIR
> +  export TRACING_DIR=`mktemp -d $TRACING_DIR/instances/ftracetest.XXXXXX`
> +  run_test $t
> +  rmdir $TRACING_DIR
> +  TRACING_DIR=$SAVED_TRACING_DIR
> +done

I have a slight modification to this. Will send soon.

-- Steve

> +
>  prlog ""
>  prlog "# of passed: " `echo $PASSED_CASES | wc -w`
>  prlog "# of failed: " `echo $FAILED_CASES | wc -w`
> -----------
> 
> Would this work for you?
> 
> Thank you,
> 
> > +
> >  eval_result() { # sigval
> >    case $1 in
> >      $PASS)
> > @@ -233,18 +242,26 @@ exit_xfail () {
> >  }
> >  trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL
> >  
> > +INSTANCE_DIR="."
> >  __run_test() { # testfile
> >    # setup PID and PPID, $$ is not updated.
> >    (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1)
> >    [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
> >  }
> >  
> > +TEST_INSTANCES=0
> > +
> >  # Run one test case
> >  run_test() { # testfile
> >    local testname=`basename $1`
> >    local testlog=`mktemp $LOG_DIR/${testname}-log.XXXXXX`
> >    export TMPDIR=`mktemp -d /tmp/ftracetest-dir.XXXXXX`
> >    testcase $1
> > +  local SAVE_TRACING_DIR=$TRACING_DIR
> > +  if [ $TEST_INSTANCES -eq 1 ]; then
> > +    TRACING_DIR=$TRACING_DIR/instances/${testname}_test_$$
> > +    mkdir $TRACING_DIR
> > +  fi
> >    echo "execute: "$1 > $testlog
> >    SIG_RESULT=0
> >    if [ $VERBOSE -ge 2 ]; then
> > @@ -260,17 +277,40 @@ run_test() { # testfile
> >      [ $VERBOSE -ge 1 ] && catlog $testlog
> >      TOTAL_RESULT=1
> >    fi
> > +  if [ $TEST_INSTANCES -eq 1 ]; then
> > +    rmdir $TRACING_DIR
> > +  fi
> > +  TRACING_DIR=$SAVE_TRACING_DIR
> >    rm -rf $TMPDIR
> >  }
> >  
> >  # load in the helper functions
> >  . $TEST_DIR/functions
> >  
> > +RUN_INSTANCES=0
> > +
> >  # Main loop
> >  for t in $TEST_CASES; do
> > +  testinstance $t
> > +  if [ $INSTANCE -eq 1 ]; then
> > +    RUN_INSTANCES=1
> > +  fi
> >    run_test $t
> >  done
> >  
> > +TEST_INSTANCES=1
> > +
> > +if [ $RUN_INSTANCES -eq 1 ]; then
> > +    echo "Running tests in a tracing instance:"
> > +    for t in $TEST_CASES; do
> > +	testinstance $t
> > +	if [ $INSTANCE -eq 0 ]; then
> > +	    continue
> > +	fi
> > +	run_test $t
> > +    done
> > +fi
> > +
> >  prlog ""
> >  prlog "# of passed: " `echo $PASSED_CASES | wc -w`
> >  prlog "# of failed: " `echo $FAILED_CASES | wc -w`
> > -- 
> > 2.9.3
> >   
> 
>