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#!/bin/bash
#
# SPDX-FileCopyrightText: 2015 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
# SPDX-FileCopyrightText: 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
#
# SPDX-License-Identifier: LGPL-2.1-only
TEST_DESC="UST - Blocking mode"
CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/../../..
SESSION_NAME="blocking"
CHANNEL_NAME="testchan"
TESTAPP_PATH="$TESTDIR/utils/testapp"
TESTAPP_NAME="gen-ust-events"
TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
EVENT_NAME="tp:tptest"
NUM_TESTS=49
# shellcheck source=../utils/utils.sh
source "$TESTDIR/utils/utils.sh"
# MUST set TESTDIR before calling those functions
# Run app on a single CPU to ensure we only write in a single ring buffer.
function run_app()
{
retry_anycpu_taskset $TESTAPP_BIN -i $NUM_EVENT
ok $? "Application done"
}
function check_disk_space()
{
local path
path="${1:?}"
kb_free=$(df -k -P "${path}" | tail -n 1 | awk '{ print $4 }')
if [ "${kb_free}" -lt "1048576" ] ; then
return 1
fi
return 0
}
function test_ust_implicit_no_blocking()
{
NUM_EVENT=5000000
diag "UST implicit non-blocking mode (default): will hang if fails"
start_lttng_sessiond
# session in no-output mode
create_lttng_session_no_output $SESSION_NAME
enable_ust_lttng_event_ok $SESSION_NAME "$EVENT_NAME"
start_lttng_tracing_ok $SESSION_NAME
run_app
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
stop_lttng_sessiond
ok 0 "Does not hang"
}
function test_ust_implicit_no_blocking_with_channel_blocking()
{
NUM_EVENT=5000000
diag "UST implicit non-blocking mode (default) with blocking-timeout=inf channel: will hang if fails"
start_lttng_sessiond
# session in no-output mode
create_lttng_session_no_output $SESSION_NAME
enable_ust_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME "--blocking-timeout=inf"
enable_ust_lttng_event_ok $SESSION_NAME "$EVENT_NAME" $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
run_app
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
stop_lttng_sessiond
ok 0 "Does not hang"
}
function test_ust_timeout_no_blocking()
{
NUM_EVENT=12500
diag "UST 1ms timeout blocking mode: will hang if fails"
start_lttng_sessiond
# session in no-output mode
create_lttng_session_no_output $SESSION_NAME
# blocking timeout 1ms
enable_ust_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME "--blocking-timeout=1000"
enable_ust_lttng_event_ok $SESSION_NAME "$EVENT_NAME" $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
LTTNG_UST_ALLOW_BLOCKING=1 run_app
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
stop_lttng_sessiond
ok 0 "Does not hang"
}
function test_ust_snapshot_no_blocking()
{
NUM_EVENT=5000000
diag "UST blocking mode: don't block in snapshot mode"
# Test without the plugin
start_lttng_sessiond
create_lttng_session_ok $SESSION_NAME $TRACE_PATH --snapshot
# blocking timeout 1ms
enable_ust_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME "--blocking-timeout=1000"
enable_ust_lttng_event_ok $SESSION_NAME "$EVENT_NAME" $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
LTTNG_UST_ALLOW_BLOCKING=1 run_app
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
stop_lttng_sessiond
ok 0 "Does not hang"
}
function test_ust_blocking_no_discard()
{
NUM_EVENT=5000000
diag "UST blocking mode: no event discarded"
# Test without the plugin
start_lttng_sessiond
create_lttng_session_ok $SESSION_NAME $TRACE_PATH
# infinite blocking timeout
enable_ust_lttng_channel_ok $SESSION_NAME $CHANNEL_NAME "--blocking-timeout=inf"
enable_ust_lttng_event_ok $SESSION_NAME "$EVENT_NAME" $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
LTTNG_UST_ALLOW_BLOCKING=1 run_app
stop_lttng_tracing_ok $SESSION_NAME
discarded=$("${XML_EXTRACT}" <("${TESTDIR}/../src/bin/lttng/${LTTNG_BIN}" --mi=xml list --channel="${CHANNEL_NAME}" "${SESSION_NAME}") '//lttng:command/lttng:output/lttng:sessions/lttng:session/lttng:domains/lttng:domain/lttng:channels/lttng:channel/lttng:attributes/lttng:discarded_events')
destroy_lttng_session_ok $SESSION_NAME
stop_lttng_sessiond
test "$(echo "${discarded}" | grep -Eo '[0-9]+')" = "0"
ok $? "No event lost with UST blocking mode: ${discarded}"
}
plan_tests $NUM_TESTS
print_test_banner "$TEST_DESC"
bail_out_if_no_babeltrace
if ! check_disk_space "${TMPDIR:-/tmp}"; then
BAIL_OUT "Not enough free space to run blocking tests"
fi
TESTS=(
"test_ust_implicit_no_blocking"
"test_ust_implicit_no_blocking_with_channel_blocking"
"test_ust_timeout_no_blocking"
"test_ust_snapshot_no_blocking"
"test_ust_blocking_no_discard"
)
TEST_COUNT=${#TESTS[@]}
i=0
while [ "$i" -lt "$TEST_COUNT" ]; do
TRACE_PATH=$(mktemp -d -t tmp.test_blocking_ust_trace_path.XXXXXX)
# Execute test
${TESTS[$i]}
rm -rf $TRACE_PATH
let "i++"
done
|
