tests/tools/streaming/high_throughput_limits

   1 #!/bin/bash
   2 #
   3 # Copyright (C) - 2012 Christian Babeux <christian.babeux@efficios.com>
   4 #                      David Goulet <dgoulet@efficios.com>
   5 #
   6 # This library is free software; you can redistribute it and/or modify it under
   7 # the terms of the GNU Lesser General Public License as published by the Free
   8 # Software Foundation; version 2.1 of the License.
   9 #
  10 # This library is distributed in the hope that it will be useful, but WITHOUT
  11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12 # FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
  13 # details.
  14 #
  15 # You should have received a copy of the GNU Lesser General Public License
  16 # along with this library; if not, write to the Free Software Foundation, Inc.,
  17 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  18
  19 TEST_DESC="Streaming - High throughput with bandwidth limits"
  20
  21 CURDIR=$(dirname $0)/
  22 TESTDIR=$CURDIR/../..
  23 NR_APP_ITER=10
  24 NR_ITER=1000000
  25 BIN_NAME="gen-ust-events"
  26 SESSION_NAME="high-throughput"
  27 EVENT_NAME="tp:tptest"
  28 SESSIOND_CTRL_PORT=5342
  29 SESSIOND_DATA_PORT=5343
  30 DEFAULT_IF="lo"
  31
  32 TRACE_PATH=$(mktemp -d)
  33
  34 source $TESTDIR/utils.sh
  35
  36 print_test_banner "$TEST_DESC"
  37
  38 if [ ! -x "$CURDIR/$BIN_NAME" ]; then
  39         echo -e "No UST nevents binary detected. Passing."
  40         exit 0
  41 fi
  42
  43 if [ "$(id -u)" != "0" ]; then
  44         echo "This test must be running as root to set bandwidth limits. Aborting"
  45         # Exit status 0 so the tests can continue
  46         exit 0
  47 fi
  48
  49 function set_bw_limit
  50 {
  51         limit=$1
  52         ctrlportlimit=$(($limit/10))
  53         # failsafe to have at least 1kbit/s for control (in the case where $1 < 10)
  54         [ $ctrlportlimit = 0 ] && ctrlportlimit=1
  55         # if $1 < 10, we might bust the limit set here, but the
  56         # parent qdisc (1:) will always limit us to the right max value
  57         dataportlimit=$((9*${ctrlportlimit}))
  58
  59         echo -n "Setting bandwidth limits to ${limit}kbits, (${ctrlportlimit} for control and ${dataportlimit} for data)... "
  60         tc qdisc add dev $DEFAULT_IF root handle 1: htb default 15 >/dev/null 2>&1
  61
  62         # the total bandwidth is the limit set by the user
  63         tc class add dev $DEFAULT_IF parent 1: classid 1:1 htb rate ${limit}kbit ceil ${limit}kbit >/dev/null 2>&1
  64         # 1/10 of the bandwidth guaranteed and traffic prioritized for the control port
  65         tc class add dev $DEFAULT_IF parent 1:1 classid 1:10 htb rate ${ctrlportlimit}kbit ceil ${limit}kbit prio 1 >/dev/null 2>&1
  66         # 9/10 of the bandwidth guaranteed and can borrow up to the total bandwidth (if unused)
  67         tc class add dev $DEFAULT_IF parent 1:1 classid 1:11 htb rate ${dataportlimit}kbit ceil ${limit}kbit prio 2 >/dev/null 2>&1
  68
  69         # filter to assign control traffic to the 1:10 class
  70         tc filter add dev $DEFAULT_IF parent 1: protocol ip u32 match ip dport $SESSIOND_CTRL_PORT 0xffff flowid 1:10 >/dev/null 2>&1
  71         # filter to assign data traffic to the 1:11 class
  72         tc filter add dev $DEFAULT_IF parent 1: protocol ip u32 match ip dport $SESSIOND_DATA_PORT 0xffff flowid 1:11 >/dev/null 2>&1
  73         print_ok
  74 }
  75
  76 function reset_bw_limit
  77 {
  78         echo -n "Resetting bandwidth limits... "
  79         tc qdisc del dev $DEFAULT_IF root >/dev/null 2>&1
  80         print_ok
  81 }
  82
  83 function create_lttng_session_with_uri
  84 {
  85         sess_name=$1
  86         uri=$2
  87         # Create session with custom URI
  88         $TESTDIR/../src/bin/lttng/$LTTNG_BIN create -U $uri $sess_name >/dev/null 2>&1
  89 }
  90
  91 function run_apps
  92 {
  93         for i in `seq 1 $NR_APP_ITER`; do
  94                 # With bandwidth limitation, unfortunately, application easily timeout
  95                 # due to very slow communication between the consumer and relayd making
  96                 # the status reply from the consumer quite slow thus delaying the
  97                 # registration done message.
  98                 LTTNG_UST_REGISTER_TIMEOUT=-1 ./$CURDIR/$BIN_NAME $NR_ITER & >/dev/null 2>&1
  99         done
 100 }
 101
 102 function wait_apps
 103 {
 104         echo "Waiting for applications to end"
 105         while [ -n "$(pidof $BIN_NAME)" ]; do
 106                 echo -n "."
 107                 sleep 1
 108         done
 109         echo ""
 110 }
 111
 112 function test_high_throughput
 113 {
 114         NETWORK_URI="net://localhost"
 115         create_lttng_session_with_uri $SESSION_NAME $NETWORK_URI
 116         enable_ust_lttng_event $SESSION_NAME $EVENT_NAME
 117         start_lttng_tracing $SESSION_NAME
 118         run_apps
 119         wait_apps
 120
 121         stop_lttng_tracing $SESSION_NAME
 122         destroy_lttng_session $SESSION_NAME
 123         validate_event_count
 124 }
 125
 126 function validate_event_count
 127 {
 128
 129         TEMP_FILE=$(mktemp)
 130         TEMP_FILE_2=$(mktemp)
 131
 132         traced=$(babeltrace $TRACE_PATH 2>/dev/null | wc -l)
 133         babeltrace $TRACE_PATH >/dev/null 2>$TEMP_FILE_2
 134
 135         cat $TEMP_FILE_2 | cut -f4 -d " " >$TEMP_FILE
 136
 137         dropped=0
 138         while read line;
 139         do
 140                 let dropped=$dropped+$line
 141         done < $TEMP_FILE
 142
 143         let total=$dropped+$traced
 144         let wanted=$NR_APP_ITER*$NR_ITER
 145
 146         if [ $wanted -ne $total ]; then
 147                 echo -n "Expected $wanted. Dropped $dropped. Recorded $traced. Total $total... "
 148                 print_fail
 149                 return 1
 150         else
 151                 echo -n "Expected $wanted. Dropped $dropped. Recorded $traced. Total $total... "
 152                 print_ok
 153
 154                 # Cleanup only if everything is ok and passes.
 155                 rm -rf $TRACE_PATH
 156                 rm $TEMP_FILE $TEMP_FILE_2
 157
 158                 return 0
 159         fi
 160 }
 161
 162 function interrupt_cleanup()
 163 {
 164         echo -en "\n*** Exiting ***\n"
 165         stop_lttng_relayd
 166         stop_lttng_sessiond
 167         reset_bw_limit
 168         exit 1
 169 }
 170
 171 # Catch sigint and try to cleanup limits
 172 trap interrupt_cleanup SIGINT
 173
 174 BW_LIMITS=(3200 1600 800 400 200 100 50 25)
 175 for BW in ${BW_LIMITS[@]};
 176 do
 177         echo ""
 178         echo -e "=== Testing high-throughput with bandwidth limit set to ${BW}kbits"
 179         set_bw_limit $BW
 180
 181         start_lttng_sessiond
 182         start_lttng_relayd "-o $TRACE_PATH"
 183         test_high_throughput
 184         result=$?
 185         stop_lttng_relayd
 186         stop_lttng_sessiond
 187         reset_bw_limit
 188
 189         if [ $result -ne 0 ]; then
 190                 exit 1
 191         fi
 192 done