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

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Date:   Fri, 21 Apr 2017 19:00:25 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Shuah Khan <shuah@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [RFC][PATCH] selftests: ftrace: Allow some tests to be run in a
 tracing instance

On Fri, 21 Apr 2017 18:36:17 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> On Thu, 20 Apr 2017 13:30:34 -0400
> Steven Rostedt <rostedt@...dmis.org> wrote:
> > 
> > An tracing instance has several of the same capabilities as the top level
> > instance, but may be implemented slightly different. Instead of just writing
> > tests that duplicat the same test cases of the top level instance, allow a
> > test to be written for both the top level as well as for an instance.
> > 
> > If a test case can be run in both the top level as well as in an tracing
> > instance directory, then it should have a ".itc" extension instead of just
> > the ".tc" extension.
> 
> Hm, I'd rather like to have a tag for each script instead of
> using the extension. E.g.
> 
> #!/bin/sh
> # description: Kprobe dynamic event - busy event check
> # test: instance

BTW, I also have some comments, see below,

[...]
> > +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)
> > +  (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; cd $INSTANCE_DIR; . $1)

You can just change "cd $TRACING_DIR;" with "cd $TRACING_DIR/$INSTANCE_DIR;"
Then, the default value of INSTANCE_DIR can be "".

> >    [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
> >  }
> >  
> >  # Run one test case
> > -run_test() { # testfile
> > +run_test() { # [-i] testfile
> > +  local makeinstance=0
> > +  if [ $1 == "-i" ]; then
> > +    makeinstance=1
> > +    shift
> > +  fi

No, don't parse argument in the function. You can just define
MAKEINSTANCE=1 global variable before calling this.

> >    local testname=`basename $1`
> >    local testlog=`mktemp $LOG_DIR/${testname}-log.XXXXXX`
> >    export TMPDIR=`mktemp -d /tmp/ftracetest-dir.XXXXXX`
> >    testcase $1

Anyway, if we use a "tag" in the script header, we can get it
in this testcase() and update TEST_TAGS global variable there.

> > +  if [ $makeinstance -eq 1 ]; then

and check whether "instance" tag in $TEST_TAGS here.

> > +    INSTANCE_DIR=$TRACING_DIR/instances/${testname}_test
> > +    mkdir $INSTANCE_DIR
> > +  fi


> >    echo "execute: "$1 > $testlog
> >    SIG_RESULT=0
> >    if [ $VERBOSE -ge 2 ]; then
> > @@ -260,17 +274,36 @@ run_test() { # testfile
> >      [ $VERBOSE -ge 1 ] && catlog $testlog
> >      TOTAL_RESULT=1
> >    fi
> > +  if [ $makeinstance -eq 1 ]; then

Here also we can just check the "$INSTANCE_DIR" is not empty.

Thank you,

> > +    rmdir $INSTANCE_DIR
> > +    INSTANCE_DIR="."
> > +  fi
> >    rm -rf $TMPDIR
> >  }
> >  
> >  # load in the helper functions
> >  . $TEST_DIR/functions
> >  
> > +RUN_INSTANCES=0
> > +
> >  # Main loop
> >  for t in $TEST_CASES; do
> > +  if [ "${t/*./}" == "itc" ]; then
> > +    RUN_INSTANCES=1
> > +  fi
> >    run_test $t
> >  done
> >  
> > +if [ $RUN_INSTANCES -eq 1 ]; then
> > +    echo "Running tests in an tracing instance:"
> > +    for t in $TEST_CASES; do
> > +	if [ "${t/*./}" != "itc" ]; then
> > +	    continue
> > +	fi
> > +	run_test -i $t
> > +    done
> > +fi
> > +
> >  prlog ""
> >  prlog "# of passed: " `echo $PASSED_CASES | wc -w`
> >  prlog "# of failed: " `echo $FAILED_CASES | wc -w`
> > -- 
> > 2.9.3
> > 
> 
> 
> -- 
> Masami Hiramatsu <mhiramat@...nel.org>


-- 
Masami Hiramatsu <mhiramat@...nel.org>