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|
#!/bin/bash
#
# SPDX-FileCopyrightText: 2013 Julien Desfossez <jdesfossez@efficios.com>
#
# SPDX-License-Identifier: LGPL-2.1-only
TEST_DESC="Snapshots - Kernel tracing"
CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/../../..
EVENT_NAME="sched_switch"
SESSION_NAME=""
CHANNEL_NAME="snapchan"
TRACE_PATH=$(mktemp -d -t tmp.test_snapshots_kernel_trace_path.XXXXXX)
NUM_TESTS=2083
source $TESTDIR/utils/utils.sh
function test_kernel_local_snapshot ()
{
diag "Test local kernel snapshots"
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
lttng_snapshot_record $SESSION_NAME
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
# Validate test
validate_trace_path_kernel_snapshot "$TRACE_PATH" "" "snapshot-1" 0 ""
validate_trace $EVENT_NAME $TRACE_PATH/
if [ $? -eq 0 ]; then
# Only delete if successful
rm -rf $TRACE_PATH
fi
}
function test_kernel_local_snapshot_after_stop ()
{
diag "Test local kernel snapshots after stop"
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
stop_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
lttng_snapshot_record $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
# Validate test
validate_trace $EVENT_NAME $TRACE_PATH/
if [ $? -eq 0 ]; then
# Only delete if successful
rm -rf $TRACE_PATH
fi
}
function test_kernel_local_snapshot_append_to_metadata ()
{
local EVENT1=sched_switch
local EVENT2=sched_process_exit
diag "Test local kernel snapshots with one event $EVENT1"
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
lttng_enable_kernel_event $SESSION_NAME $EVENT1 $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
# first snapshot with only 1 event
lttng_snapshot_record $SESSION_NAME
validate_trace $EVENT_NAME $TRACE_PATH/
if [ $? -eq 0 ]; then
# Only delete if successful
rm -rf $TRACE_PATH
fi
diag "Adding event $EVENT2"
# second snapshot with 2 events
lttng_enable_kernel_event $SESSION_NAME $EVENT2 $CHANNEL_NAME
rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
lttng_snapshot_record $SESSION_NAME
validate_trace "${EVENT1},${EVENT2}" $TRACE_PATH/
if [ $? -eq 0 ]; then
# Only delete if successful
rm -rf $TRACE_PATH
fi
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
}
function generate_filter_events_cpu0()
{
# Generate many events (fill buffers) on a single CPU
retry_anycpu_taskset /bin/echo -n "$1" > /proc/lttng-test-filter-event 2> /dev/null
}
function test_kernel_local_snapshot_discard ()
{
diag "Test local kernel snapshots with small discard buffers"
local event_name="lttng_test_filter_event"
modprobe lttng-test
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \
$CHANNEL_NAME
enable_kernel_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
generate_filter_events_cpu0 10000
# Take first snapshot, remember first line.
lttng_snapshot_record $SESSION_NAME
FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
diag "First line (1st snapshot): $FIRST_LINE"
rm -rf $TRACE_PATH
# Fill CPU 0's buffer and overwrite previous contents
generate_filter_events_cpu0 10000
# Take 2nd snapshot, compare first line. In discard mode, they
# should still be the same.
lttng_snapshot_record $SESSION_NAME
FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
diag "First line (2nd snapshot): $FIRST_LINE"
rm -rf $TRACE_PATH
if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
fail "First snapshot event do not match"
else
pass "First snapshot event match"
fi
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
modprobe --remove lttng-test
}
function test_kernel_local_snapshot_overwrite_small_buffers ()
{
diag "Test local kernel snapshot with small overwrite buffers"
local event_name="lttng_test_filter_event"
modprobe lttng-test
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \
$CHANNEL_NAME
enable_kernel_lttng_event_ok $SESSION_NAME $event_name $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
generate_filter_events_cpu0 10000
# Take first snapshot, remember first line.
lttng_snapshot_record $SESSION_NAME
FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
diag "First line (1st snapshot): $FIRST_LINE"
rm -rf $TRACE_PATH
# Fill CPU 0's buffer and overwrite previous contents
generate_filter_events_cpu0 10000
# Take 2nd snapshot, compare first line. In overwrite mode, they
# WILL be different.
lttng_snapshot_record $SESSION_NAME
FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
diag "First line (2nd snapshot): $FIRST_LINE_2"
rm -rf $TRACE_PATH
if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
pass "First snapshot event do not match"
else
fail "First snapshot event match"
fi
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
modprobe --remove lttng-test
}
function test_kernel_1000_local_snapshots ()
{
NB_SNAP=1000
diag "Test local kernel snapshots"
create_lttng_session_no_output $SESSION_NAME
enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
start_lttng_tracing_ok $SESSION_NAME
lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
for i in $(seq 1 $NB_SNAP); do
diag "Snapshot $i/$NB_SNAP"
rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
lttng_snapshot_record $SESSION_NAME
# Validate test
validate_trace $EVENT_NAME $TRACE_PATH/
if [ $? -eq 0 ]; then
# Only delete if successful
rm -rf $TRACE_PATH
else
break
fi
done
stop_lttng_tracing_ok $SESSION_NAME
destroy_lttng_session_ok $SESSION_NAME
}
function test_kernel_snapshot_consecutive_no_new_events ()
{
local event_name="lttng_test_filter_event"
local event_count="10000"
local snapshot_count="5"
local first_lines=()
local counts=()
diag "Test consecutive local kernel snapshots that have no new events"
modprobe lttng-test
create_lttng_session_no_output "${SESSION_NAME}"
enable_lttng_mmap_overwrite_small_kernel_channel "${SESSION_NAME}" "${CHANNEL_NAME}"
enable_kernel_lttng_event_ok "${SESSION_NAME}" "${event_name}" "${CHANNEL_NAME}"
start_lttng_tracing_ok "${SESSION_NAME}"
lttng_snapshot_add_output_ok "${SESSION_NAME}" "file://${TRACE_PATH}"
generate_filter_events_cpu0 "${event_count}"
for i in $(seq 1 "${snapshot_count}") ; do
lttng_snapshot_record "${SESSION_NAME}"
first_lines+=("$(trace_first_line "${TRACE_PATH}/")")
counts+=("$("${BABELTRACE_BIN}" "${TRACE_PATH}" | grep -c "${event_name}")")
rm -rf "${TRACE_PATH:?}/"
done
for x in $(seq 1 $(("${snapshot_count}" - 1))); do
[[ "${first_lines[0]}" == "${first_lines[${x}]}" ]]
ok "${?}" "first line of snapshot 0 and ${x} match"
[[ "${counts[0]}" == "${counts[${x}]}" ]]
ok "${?}" "Event '${event_name}' counts in snapshot 0 and ${x} match"
done
stop_lttng_tracing_ok "${SESSION_NAME}"
destroy_lttng_session_ok "${SESSION_NAME}"
modprobe --remove lttng-test
rm -rf "${TRACE_PATH}"
}
plan_tests $NUM_TESTS
print_test_banner "$TEST_DESC"
bail_out_if_no_babeltrace
check_skip_kernel_test "$NUM_TESTS" "Skipping all tests." ||
{
lttng_modules_loaded_fail
validate_lttng_modules_present
start_lttng_sessiond
tests=(
test_kernel_local_snapshot
test_kernel_local_snapshot_after_stop
test_kernel_local_snapshot_append_to_metadata
test_kernel_local_snapshot_discard
test_kernel_local_snapshot_overwrite_small_buffers
test_kernel_1000_local_snapshots
test_kernel_snapshot_consecutive_no_new_events
)
for fct_test in ${tests[@]};
do
SESSION_NAME=$(randstring 16 0)
${fct_test}
done
stop_lttng_sessiond
lttng_modules_loaded_fail
}
|
