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