Document test anti-patterns
[lttng-tools.git] / tests / regression / ust / nprocesses / test_nprocesses
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1#!/bin/bash
2#
3# Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
4#
5# This library is free software; you can redistribute it and/or modify it under
6# the terms of the GNU Lesser General Public License as published by the Free
7# Software Foundation; version 2.1 of the License.
8#
9# This library is distributed in the hope that it will be useful, but WITHOUT
10# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12# details.
13#
14# You should have received a copy of the GNU Lesser General Public License
15# along with this library; if not, write to the Free Software Foundation, Inc.,
16# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17NUM_PROCESS=30
18TEST_DESC="UST tracer - Generate $NUM_PROCESS process"
19
20CURDIR=$(dirname $0)/
21TESTDIR=$CURDIR/../../..
22NR_ITER=-1 # infinite loop
23NR_USEC_WAIT=1000000
24TESTAPP_PATH="$TESTDIR/utils/testapp"
25TESTAPP_NAME="gen-ust-events"
26TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
27SESSION_NAME="ust-nprocesses"
28EVENT_NAME="tp:tptest"
29TEST_WAIT_SEC=5
30NUM_TESTS=9
31APPS_PID=
32
33source $TESTDIR/utils/utils.sh
34
35if [ ! -x "$TESTAPP_BIN" ]; then
36 BAIL_OUT "No UST $TESTAPP_BIN binary detected."
37fi
38
39# MUST set TESTDIR before calling those functions
40
41plan_tests $NUM_TESTS
42
43print_test_banner "$TEST_DESC"
44
45start_lttng_sessiond
46
47# Start tests. Each is an infinite tracing loop.
48
49diag "Starting $NUM_PROCESS test applications"
50for i in `seq 1 $NUM_PROCESS`
51do
52 $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT >/dev/null 2>&1 &
53 APPS_PID="${APPS_PID} ${!}"
54done
55
56diag "Waiting for applications to be registered to sessiond"
57
58reg_app_count=0
59while [ $reg_app_count -ne $NUM_PROCESS ]; do
60 listing=$($TESTDIR/../src/bin/lttng/$LTTNG_BIN list -u)
61 reg_app_count=$(echo -n $listing | sed "s#$TESTAPP_BIN#$TESTAPP_BIN\n#g" | grep "$TESTAPP_BIN" | wc -l)
62done
63
64pass "All applications are registered to sessiond"
65
66TRACE_PATH=$(mktemp -d)
67
68create_lttng_session $SESSION_NAME $TRACE_PATH
69
70enable_ust_lttng_event $SESSION_NAME $EVENT_NAME
71start_lttng_tracing $SESSION_NAME
72
73# We don't validate whether the applications have traced here, rather
74# just that they registered to sessiond (above).
75
76stop_lttng_tracing $SESSION_NAME
77destroy_lttng_session $SESSION_NAME
78
79rm -rf $TRACE_PATH
80
81diag "Stopping all spawned applications"
82for p in ${APPS_PID}; do
83 kill ${p}
84 wait ${p} 2>/dev/null
85done
86pass "Stopped all spawned applications"
87
88stop_lttng_sessiond
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