tests/regression/tools/snapshots/test_kernel

   1 #!/bin/bash
   2 #
   3 # Copyright (C) - 2013 Julien Desfossez <jdesfossez@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
  17 TEST_DESC="Snapshots - Kernel tracing"
  18
  19 CURDIR=$(dirname $0)/
  20 TESTDIR=$CURDIR/../../..
  21 EVENT_NAME="sched_switch"
  22 PID_RELAYD=0
  23 SESSION_NAME=""
  24 CHANNEL_NAME="snapchan"
  25
  26 TRACE_PATH=$(mktemp -d)
  27
  28 NUM_TESTS=2060
  29
  30 source $TESTDIR/utils/utils.sh
  31
  32 function test_kernel_local_snapshot ()
  33 {
  34         diag "Test local kernel snapshots"
  35         create_lttng_session_no_output $SESSION_NAME
  36         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  37         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
  38         start_lttng_tracing_ok $SESSION_NAME
  39         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
  40         lttng_snapshot_record $SESSION_NAME
  41         stop_lttng_tracing_ok $SESSION_NAME
  42         destroy_lttng_session_ok $SESSION_NAME
  43
  44         # Validate test
  45         validate_trace $EVENT_NAME $TRACE_PATH/
  46         if [ $? -eq 0 ]; then
  47                 # Only delete if successful
  48                 rm -rf $TRACE_PATH
  49         else
  50                 break
  51         fi
  52 }
  53
  54 function test_kernel_local_snapshot_after_stop ()
  55 {
  56         diag "Test local kernel snapshots after stop"
  57         create_lttng_session_no_output $SESSION_NAME
  58         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  59         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
  60         start_lttng_tracing_ok $SESSION_NAME
  61         stop_lttng_tracing_ok $SESSION_NAME
  62         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
  63         lttng_snapshot_record $SESSION_NAME
  64         destroy_lttng_session_ok $SESSION_NAME
  65
  66         # Validate test
  67         validate_trace $EVENT_NAME $TRACE_PATH/
  68         if [ $? -eq 0 ]; then
  69                 # Only delete if successful
  70                 rm -rf $TRACE_PATH
  71         else
  72                 break
  73         fi
  74 }
  75
  76 function test_kernel_local_snapshot_append_to_metadata ()
  77 {
  78         local EVENT1=sched_switch
  79         local EVENT2=sched_process_exit
  80
  81         diag "Test local kernel snapshots with one event $EVENT1"
  82         create_lttng_session_no_output $SESSION_NAME
  83         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
  84         lttng_enable_kernel_event $SESSION_NAME $EVENT1 $CHANNEL_NAME
  85         start_lttng_tracing_ok $SESSION_NAME
  86         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
  87
  88         # first snapshot with only 1 event
  89         lttng_snapshot_record $SESSION_NAME
  90         validate_trace $EVENT_NAME $TRACE_PATH/
  91         if [ $? -eq 0 ]; then
  92                 # Only delete if successful
  93                 rm -rf $TRACE_PATH
  94         else
  95                 break
  96         fi
  97
  98         diag "Adding event $EVENT2"
  99         # second snapshot with 2 events
 100         lttng_enable_kernel_event $SESSION_NAME $EVENT2 $CHANNEL_NAME
 101         rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
 102         lttng_snapshot_record $SESSION_NAME
 103         validate_trace "${EVENT1},${EVENT2}" $TRACE_PATH/
 104         if [ $? -eq 0 ]; then
 105                 # Only delete if successful
 106                 rm -rf $TRACE_PATH
 107         else
 108                 break
 109         fi
 110
 111         stop_lttng_tracing_ok $SESSION_NAME
 112         destroy_lttng_session_ok $SESSION_NAME
 113 }
 114
 115 function true_loop_cpu0()
 116 {
 117         # Generate many system call events (fill buffers) on CPU 0
 118         for a in $(seq 1 $1); do
 119                 taskset 0x00000001 /bin/true;
 120         done
 121 }
 122
 123 function test_kernel_local_snapshot_discard ()
 124 {
 125         diag "Test local kernel snapshots with small discard buffers"
 126         create_lttng_session_no_output $SESSION_NAME
 127         enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \
 128                         $CHANNEL_NAME
 129         lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
 130         start_lttng_tracing_ok $SESSION_NAME
 131         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
 132
 133         true_loop_cpu0 10000
 134
 135         # Take first snapshot, remember first line.
 136         lttng_snapshot_record $SESSION_NAME
 137         FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
 138         diag "First line (1st snapshot): $FIRST_LINE"
 139
 140         rm -rf $TRACE_PATH
 141
 142         true_loop_cpu0 10000
 143
 144         # Take 2nd snapshot, compare first line. In discard mode, they
 145         # should still be the same.
 146         lttng_snapshot_record $SESSION_NAME
 147         FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
 148         diag "First line (2nd snapshot): $FIRST_LINE"
 149         rm -rf $TRACE_PATH
 150
 151         if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
 152                 fail "First snapshot event do not match."
 153         else
 154                 pass "First snapshot event match."
 155         fi
 156
 157         stop_lttng_tracing_ok $SESSION_NAME
 158         destroy_lttng_session_ok $SESSION_NAME
 159 }
 160
 161 function test_kernel_local_snapshot_overwrite_small_buffers ()
 162 {
 163         diag "Test local kernel snapshot with small overwrite buffers"
 164         create_lttng_session_no_output $SESSION_NAME
 165         enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \
 166                         $CHANNEL_NAME
 167         lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
 168         start_lttng_tracing_ok $SESSION_NAME
 169         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
 170
 171         true_loop_cpu0 10000
 172
 173         # Take first snapshot, remember first line.
 174         lttng_snapshot_record $SESSION_NAME
 175         FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
 176         diag "First line (1st snapshot): $FIRST_LINE"
 177
 178         rm -rf $TRACE_PATH
 179
 180         true_loop_cpu0 10000
 181
 182         # Take 2nd snapshot, compare first line. In overwrite mode, they
 183         # WILL be different.
 184         lttng_snapshot_record $SESSION_NAME
 185         FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
 186         diag "First line (2nd snapshot): $FIRST_LINE_2"
 187         rm -rf $TRACE_PATH
 188
 189         if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
 190                 pass "First snapshot event do not match."
 191         else
 192                 fail "First snapshot event match."
 193         fi
 194
 195         stop_lttng_tracing_ok $SESSION_NAME
 196         destroy_lttng_session_ok $SESSION_NAME
 197 }
 198
 199 function test_kernel_1000_local_snapshots ()
 200 {
 201         NB_SNAP=1000
 202
 203         diag "Test local kernel snapshots"
 204         create_lttng_session_no_output $SESSION_NAME
 205         enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
 206         lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
 207         start_lttng_tracing_ok $SESSION_NAME
 208         lttng_snapshot_add_output_ok $SESSION_NAME $TRACE_PATH
 209         for i in $(seq 1 $NB_SNAP); do
 210                 diag "Snapshot $i/$NB_SNAP"
 211                 rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
 212                 lttng_snapshot_record $SESSION_NAME
 213                 # Validate test
 214                 validate_trace $EVENT_NAME $TRACE_PATH/
 215                 if [ $? -eq 0 ]; then
 216                         # Only delete if successful
 217                         rm -rf $TRACE_PATH
 218                 else
 219                         break
 220                 fi
 221         done
 222         stop_lttng_tracing_ok $SESSION_NAME
 223         destroy_lttng_session_ok $SESSION_NAME
 224 }
 225
 226 plan_tests $NUM_TESTS
 227
 228 print_test_banner "$TEST_DESC"
 229
 230 if [ "$(id -u)" == "0" ]; then
 231         isroot=1
 232 else
 233         isroot=0
 234 fi
 235
 236 skip $isroot "Root access is needed. Skipping all kernel snapshot tests." $NUM_TESTS ||
 237 {
 238
 239         validate_lttng_modules_present
 240
 241         start_lttng_sessiond
 242
 243         #tests=( test_kernel_1000_local_snapshots )
 244         tests=( test_kernel_local_snapshot
 245                 test_kernel_local_snapshot_after_stop
 246                 test_kernel_local_snapshot_append_to_metadata
 247                 test_kernel_local_snapshot_discard
 248                 test_kernel_local_snapshot_overwrite_small_buffers
 249                 test_kernel_1000_local_snapshots
 250         )
 251
 252         for fct_test in ${tests[@]};
 253         do
 254                 SESSION_NAME=$(randstring 16 0)
 255                 ${fct_test}
 256
 257         done
 258
 259         stop_lttng_sessiond
 260 }