From: Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org>
To: Anders Wallin <wallinux@gmail.com>
Cc: lttng-dev <lttng-dev@lists.lttng.org>
Subject: Re: [lttng-dev] [PATCH lttng-tools] Fix: test code assumes that child process is schedule to run before parent
Date: Thu, 8 Apr 2021 08:48:15 -0400 (EDT) [thread overview]
Message-ID: <621616245.61369.1617886095197.JavaMail.zimbra@efficios.com> (raw)
In-Reply-To: <CAF2baFcBgU+GH_yh5khVki1KHT8on90vNvPgnQxiWM6pwTbsLQ@mail.gmail.com>
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----- On Apr 8, 2021, at 5:22 AM, Anders Wallin <wallinux@gmail.com> wrote:
> OK,
> I tried this and for
> - test_event_vpid_track_untrack ust 0 "${EVENT_NAME}"
> - test_event_pid_track_untrack ust 0 "${EVENT_NAME}"
> it works well.
> For
> - test_event_vpid_tracker ust 0 "${EVENT_NAME}"
> - test_event_pid_tracker ust 0 "${EVENT_NAME}"
> validate_trace_empty fails since there is no data at all in the trace_path
> This run is just calling copy of test_event_tracker running only
> "test_event_vpid_tracker ust 0 ..."
> 1..747
> # LTTng - Event tracker test
> ok 1 - Start session daemon
> # Test UST tracker
> ok 2 - Create session tracker in -o /tmp/tmp.lu5aeCJhQ3
> ok 3 - Enable ust event tp:tptest for session tracker
> ok 4 - Untrack command with opts: -u --all --vpid
> ok 5 - Start tracing for session
> ok 6 - Track command with opts: -u --vpid 11842
> ok 7 - Traced application stopped.
> ok 8 - Stop lttng tracing for session
> ok 9 - Destroy session tracker
> not ok 10 - Failed to parse trace
> # Failed test 'Failed to parse trace'
> # in ./regression/tools/tracker//../../../utils/tap/tap.sh:fail() at line 159.
> # Killing (signal SIGTERM) lttng-sessiond and lt-lttng-sessiond pids: 11808
> 11809 11830
> ok 11 - Wait after kill session daemon
> # Looks like you planned 747 tests but only ran 11.
> # Looks like you failed 1 test of 11.
> # find /tmp/tmp.lu5aeCJhQ3
> /tmp/tmp.lu5aeCJhQ3
> /tmp/tmp.lu5aeCJhQ3/ust
> Do you want me to add a special version of "validate_trace_empty" not returning
> "Failed to parse trace" for this? If so should it be added in
> "test_event_tracker" or in "utils.sh"
Actually, this helper already exists in utils.sh: validate_trace_session_ust_empty (), which
internally uses validate_directory_empty (). As you point out, we should use
validate_trace_session_ust_empty for the validation of those test cases which populate no
trace whatsoever.
Thanks,
Mathieu
> Anders Wallin
> On Wed, Apr 7, 2021 at 5:31 PM Mathieu Desnoyers < [
> mailto:mathieu.desnoyers@efficios.com | mathieu.desnoyers@efficios.com ] >
> wrote:
>> ----- On Apr 1, 2021, at 12:37 PM, lttng-dev [ mailto:lttng-dev@lists.lttng.org
>> | lttng-dev@lists.lttng.org ] wrote:
>> > the following tests fails
>> > - test_event_vpid_tracker ust 0 "${EVENT_NAME}"
>> > - test_event_vpid_track_untrack ust 0 "${EVENT_NAME}"
>> > - test_event_pid_tracker ust 0 "${EVENT_NAME}"
>> > - test_event_pid_track_untrack ust 0 "${EVENT_NAME}"
>> There is indeed an issue with these tests: there is a missing "untrack all pids"
>> which should be done at the very beginning of each test to have the expected
>> behavior. AFAIU this explains why there is a small window where traced
>> applications
>> can generate events when none are expected.
>> Fixing this should solve the issues without requiring any addition to the test
>> program.
>> Thanks,
>> Mathieu
>>> Signed-off-by: Anders Wallin < [ mailto:wallinux@gmail.com | wallinux@gmail.com
>> > ] >
>> > ---
>> > tests/regression/tools/tracker/test_event_tracker | 15 ++++++---------
>> > 1 file changed, 6 insertions(+), 9 deletions(-)
>> > diff --git a/tests/regression/tools/tracker/test_event_tracker
>> > b/tests/regression/tools/tracker/test_event_tracker
>> > index 711690af..78e9310b 100755
>> > --- a/tests/regression/tools/tracker/test_event_tracker
>> > +++ b/tests/regression/tools/tracker/test_event_tracker
>> > @@ -5,7 +5,7 @@
>> > #
>> > # SPDX-License-Identifier: GPL-2.0-only
>> > -TEST_DESC="LTTng - Event traker test"
>> > +TEST_DESC="LTTng - Event tracker test"
>> > CURDIR=$(dirname "$0")/
>> > TESTDIR="$CURDIR/../../.."
>> > @@ -30,27 +30,24 @@ SCRIPT_GROUPNAME="$(id -gn)"
>> > CHILD_PID=-1
>> > WAIT_PATH=
>> > -AFTER_FIRST_PATH=
>> > -BEFORE_LAST_PATH=
>> > +BEFORE_FIRST_PATH=
>> > source $TESTDIR/utils/utils.sh
>> > function prepare_ust_app
>> > {
>> > - AFTER_FIRST_PATH=$(mktemp -u)
>> > - BEFORE_LAST_PATH=$(mktemp -u)
>> > + BEFORE_FIRST_PATH=$(mktemp -u)
>> > - $TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT -a "$AFTER_FIRST_PATH" -b
>> > "$BEFORE_LAST_PATH" &
>> > + $TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT --sync-before-first-event
>> > "$BEFORE_FIRST_PATH" &
>> > CHILD_PID=$!
>> > }
>> > function trace_ust_app
>> > {
>> > - touch "$BEFORE_LAST_PATH"
>> > + touch "$BEFORE_FIRST_PATH"
>> > wait
>> > ok $? "Traced application stopped."
>> > - rm "$BEFORE_LAST_PATH"
>> > - rm "$AFTER_FIRST_PATH"
>> > + rm "$BEFORE_FIRST_PATH"
>> > }
>> > function prepare_kernel_app
>> > --
>> > 2.31.1
>> > _______________________________________________
>> > lttng-dev mailing list
>> > [ mailto:lttng-dev@lists.lttng.org | lttng-dev@lists.lttng.org ]
>>> [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>> > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ]
>> --
>> Mathieu Desnoyers
>> EfficiOS Inc.
>> [ http://www.efficios.com/ | http://www.efficios.com ]
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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next prev parent reply other threads:[~2021-04-08 12:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 16:37 [lttng-dev] [PATCH lttng-tools] Fix: test code assumes that child process is schedule to run before parent Anders Wallin via lttng-dev
2021-04-07 15:31 ` Mathieu Desnoyers via lttng-dev
2021-04-08 9:22 ` Anders Wallin via lttng-dev
2021-04-08 12:48 ` Mathieu Desnoyers via lttng-dev [this message]
2021-04-08 15:47 ` Anders Wallin via lttng-dev
-- strict thread matches above, loose matches on Subject: below --
2021-04-09 14:41 Anders Wallin via lttng-dev
2021-04-09 19:12 ` Mathieu Desnoyers via lttng-dev
2021-03-31 18:56 Anders Wallin via lttng-dev
2021-03-31 19:25 ` Jonathan Rajotte-Julien via lttng-dev
2021-03-31 21:09 ` Anders Wallin via lttng-dev
2021-03-31 21:33 ` Jonathan Rajotte-Julien via lttng-dev
2021-04-01 1:21 ` Anders Wallin via lttng-dev
2021-04-01 13:45 ` Jonathan Rajotte-Julien via lttng-dev
2021-04-01 15:02 ` Anders Wallin via lttng-dev
2021-04-01 16:19 ` Mathieu Desnoyers via lttng-dev
2021-04-01 16:21 ` Mathieu Desnoyers via lttng-dev
2021-04-01 16:33 ` Anders Wallin via lttng-dev
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