[lttng-tools.git] / tests / regression / tools / snapshots / test_kernel

#!/bin/bash
#
# Copyright (C) 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 --tmpdir -d tmp.test_snapshots_kernel_trace_path.XXXXXX)

NUM_TESTS=2061

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
	else
		break
	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
	else
		break
	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
	else
		break
	fi

	stop_lttng_tracing_ok $SESSION_NAME
	destroy_lttng_session_ok $SESSION_NAME
}

function true_loop_cpu0()
{
	# Generate many system call events (fill buffers) on CPU 0
	for a in $(seq 1 $1); do
		taskset 0x00000001 /bin/true;
	done
}

function test_kernel_local_snapshot_discard ()
{
	diag "Test local kernel snapshots with small discard buffers"
	create_lttng_session_no_output $SESSION_NAME
	enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \
			$CHANNEL_NAME
	lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
	start_lttng_tracing_ok $SESSION_NAME
	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH

	true_loop_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

	true_loop_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
}

function test_kernel_local_snapshot_overwrite_small_buffers ()
{
	diag "Test local kernel snapshot with small overwrite buffers"
	create_lttng_session_no_output $SESSION_NAME
	enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \
			$CHANNEL_NAME
	lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
	start_lttng_tracing_ok $SESSION_NAME
	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH

	true_loop_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

	true_loop_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
}

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
}

plan_tests $NUM_TESTS

print_test_banner "$TEST_DESC"

bail_out_if_no_babeltrace


if [ "$(id -u)" == "0" ]; then
	isroot=1
else
	isroot=0
fi

skip $isroot "Root access is needed. Skipping all kernel snapshot tests" $NUM_TESTS ||
{

	validate_lttng_modules_present

	start_lttng_sessiond

	#tests=( test_kernel_1000_local_snapshots )
	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
	)

	for fct_test in ${tests[@]};
	do
		SESSION_NAME=$(randstring 16 0)
		${fct_test}

	done

	stop_lttng_sessiond
}
Commit	Line	Data
07b86b52 JD	1	#!/bin/bash
07b86b52 JD	2	#
9d16b343	3	# Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
07b86b52	4	#
9d16b343 MJ	5	# SPDX-License-Identifier: LGPL-2.1-only
9d16b343 MJ	6
07b86b52 JD	7	TEST_DESC="Snapshots - Kernel tracing"
	8
	9	CURDIR=$(dirname $0)/
	10	TESTDIR=$CURDIR/../../..
	11	EVENT_NAME="sched_switch"
07b86b52 JD	12	SESSION_NAME=""
	13	CHANNEL_NAME="snapchan"
	14
33e55711	15	TRACE_PATH=$(mktemp --tmpdir -d tmp.test_snapshots_kernel_trace_path.XXXXXX)
07b86b52	16
bd666153	17	NUM_TESTS=2061
07b86b52 JD	18
	19	source $TESTDIR/utils/utils.sh
	20
07b86b52 JD	21	function test_kernel_local_snapshot ()
	22	{
	23	diag "Test local kernel snapshots"
	24	create_lttng_session_no_output $SESSION_NAME
	25	enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
	26	lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
e563bbdb	27	start_lttng_tracing_ok $SESSION_NAME
9f0e230a	28	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
07b86b52	29	lttng_snapshot_record $SESSION_NAME
96340a01	30	stop_lttng_tracing_ok $SESSION_NAME
67b4c664	31	destroy_lttng_session_ok $SESSION_NAME
07b86b52 JD	32
07b86b52 JD	33	# Validate test
bd666153	34	validate_trace_path_kernel_snapshot "$TRACE_PATH" "" "snapshot-1" 0 ""
78435723	35	validate_trace $EVENT_NAME $TRACE_PATH/
07b86b52 JD	36	if [ $? -eq 0 ]; then
	37	# Only delete if successful
	38	rm -rf $TRACE_PATH
07b86b52 JD	39	fi
	40	}
	41
	42	function test_kernel_local_snapshot_after_stop ()
	43	{
	44	diag "Test local kernel snapshots after stop"
	45	create_lttng_session_no_output $SESSION_NAME
	46	enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
	47	lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
e563bbdb	48	start_lttng_tracing_ok $SESSION_NAME
96340a01	49	stop_lttng_tracing_ok $SESSION_NAME
9f0e230a	50	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
07b86b52	51	lttng_snapshot_record $SESSION_NAME
67b4c664	52	destroy_lttng_session_ok $SESSION_NAME
07b86b52 JD	53
07b86b52 JD	54	# Validate test
78435723	55	validate_trace $EVENT_NAME $TRACE_PATH/
07b86b52 JD	56	if [ $? -eq 0 ]; then
	57	# Only delete if successful
	58	rm -rf $TRACE_PATH
	59	else
	60	break
	61	fi
	62	}
	63
	64	function test_kernel_local_snapshot_append_to_metadata ()
	65	{
78435723 JD	66	local EVENT1=sched_switch
78435723 JD	67	local EVENT2=sched_process_exit
07b86b52 JD	68
	69	diag "Test local kernel snapshots with one event $EVENT1"
	70	create_lttng_session_no_output $SESSION_NAME
	71	enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
	72	lttng_enable_kernel_event $SESSION_NAME $EVENT1 $CHANNEL_NAME
e563bbdb	73	start_lttng_tracing_ok $SESSION_NAME
9f0e230a	74	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
07b86b52 JD	75
	76	# first snapshot with only 1 event
	77	lttng_snapshot_record $SESSION_NAME
78435723	78	validate_trace $EVENT_NAME $TRACE_PATH/
07b86b52 JD	79	if [ $? -eq 0 ]; then
	80	# Only delete if successful
	81	rm -rf $TRACE_PATH
	82	else
	83	break
	84	fi
	85
	86	diag "Adding event $EVENT2"
	87	# second snapshot with 2 events
	88	lttng_enable_kernel_event $SESSION_NAME $EVENT2 $CHANNEL_NAME
	89	rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
	90	lttng_snapshot_record $SESSION_NAME
78435723	91	validate_trace "${EVENT1},${EVENT2}" $TRACE_PATH/
07b86b52 JD	92	if [ $? -eq 0 ]; then
	93	# Only delete if successful
	94	rm -rf $TRACE_PATH
	95	else
	96	break
	97	fi
	98
96340a01	99	stop_lttng_tracing_ok $SESSION_NAME
67b4c664	100	destroy_lttng_session_ok $SESSION_NAME
07b86b52 JD	101	}
07b86b52 JD	102
086e6add MD	103	function true_loop_cpu0()
	104	{
	105	# Generate many system call events (fill buffers) on CPU 0
	106	for a in $(seq 1 $1); do
	107	taskset 0x00000001 /bin/true;
	108	done
	109	}
	110
	111	function test_kernel_local_snapshot_discard ()
	112	{
	113	diag "Test local kernel snapshots with small discard buffers"
	114	create_lttng_session_no_output $SESSION_NAME
	115	enable_lttng_mmap_discard_small_kernel_channel $SESSION_NAME \
	116	$CHANNEL_NAME
	117	lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
	118	start_lttng_tracing_ok $SESSION_NAME
9f0e230a	119	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
086e6add MD	120
	121	true_loop_cpu0 10000
	122
	123	# Take first snapshot, remember first line.
	124	lttng_snapshot_record $SESSION_NAME
	125	FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
	126	diag "First line (1st snapshot): $FIRST_LINE"
	127
	128	rm -rf $TRACE_PATH
	129
	130	true_loop_cpu0 10000
	131
	132	# Take 2nd snapshot, compare first line. In discard mode, they
	133	# should still be the same.
	134	lttng_snapshot_record $SESSION_NAME
	135	FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
	136	diag "First line (2nd snapshot): $FIRST_LINE"
	137	rm -rf $TRACE_PATH
	138
	139	if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
ce83431d	140	fail "First snapshot event do not match"
086e6add	141	else
ce83431d	142	pass "First snapshot event match"
086e6add MD	143	fi
	144
	145	stop_lttng_tracing_ok $SESSION_NAME
	146	destroy_lttng_session_ok $SESSION_NAME
	147	}
	148
	149	function test_kernel_local_snapshot_overwrite_small_buffers ()
	150	{
	151	diag "Test local kernel snapshot with small overwrite buffers"
	152	create_lttng_session_no_output $SESSION_NAME
	153	enable_lttng_mmap_overwrite_small_kernel_channel $SESSION_NAME \
	154	$CHANNEL_NAME
	155	lttng_enable_kernel_syscall_ok $SESSION_NAME -a $CHANNEL_NAME
	156	start_lttng_tracing_ok $SESSION_NAME
9f0e230a	157	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
086e6add MD	158
	159	true_loop_cpu0 10000
	160
	161	# Take first snapshot, remember first line.
	162	lttng_snapshot_record $SESSION_NAME
	163	FIRST_LINE="$(trace_first_line $TRACE_PATH/)"
	164	diag "First line (1st snapshot): $FIRST_LINE"
	165
	166	rm -rf $TRACE_PATH
	167
	168	true_loop_cpu0 10000
	169
	170	# Take 2nd snapshot, compare first line. In overwrite mode, they
	171	# WILL be different.
	172	lttng_snapshot_record $SESSION_NAME
	173	FIRST_LINE_2="$(trace_first_line $TRACE_PATH/)"
	174	diag "First line (2nd snapshot): $FIRST_LINE_2"
	175	rm -rf $TRACE_PATH
	176
	177	if [ x"$FIRST_LINE" != x"$FIRST_LINE_2" ]; then
ce83431d	178	pass "First snapshot event do not match"
086e6add	179	else
ce83431d	180	fail "First snapshot event match"
086e6add MD	181	fi
	182
	183	stop_lttng_tracing_ok $SESSION_NAME
	184	destroy_lttng_session_ok $SESSION_NAME
	185	}
	186
07b86b52 JD	187	function test_kernel_1000_local_snapshots ()
	188	{
	189	NB_SNAP=1000
	190
	191	diag "Test local kernel snapshots"
	192	create_lttng_session_no_output $SESSION_NAME
	193	enable_lttng_mmap_overwrite_kernel_channel $SESSION_NAME $CHANNEL_NAME
	194	lttng_enable_kernel_event $SESSION_NAME $EVENT_NAME $CHANNEL_NAME
e563bbdb	195	start_lttng_tracing_ok $SESSION_NAME
9f0e230a	196	lttng_snapshot_add_output_ok $SESSION_NAME file://$TRACE_PATH
07b86b52 JD	197	for i in $(seq 1 $NB_SNAP); do
	198	diag "Snapshot $i/$NB_SNAP"
	199	rm -rf $TRACE_PATH/snapshot/* 2>/dev/null
	200	lttng_snapshot_record $SESSION_NAME
	201	# Validate test
78435723	202	validate_trace $EVENT_NAME $TRACE_PATH/
07b86b52 JD	203	if [ $? -eq 0 ]; then
	204	# Only delete if successful
	205	rm -rf $TRACE_PATH
	206	else
	207	break
	208	fi
	209	done
96340a01	210	stop_lttng_tracing_ok $SESSION_NAME
67b4c664	211	destroy_lttng_session_ok $SESSION_NAME
07b86b52 JD	212	}
	213
	214	plan_tests $NUM_TESTS
	215
	216	print_test_banner "$TEST_DESC"
	217
c125de8f FD	218	bail_out_if_no_babeltrace
	219
	220
07b86b52 JD	221	if [ "$(id -u)" == "0" ]; then
	222	isroot=1
	223	else
	224	isroot=0
	225	fi
	226
ce83431d	227	skip $isroot "Root access is needed. Skipping all kernel snapshot tests" $NUM_TESTS \|\|
07b86b52	228	{
9c8a3964 JR	229
	230	validate_lttng_modules_present
	231
07b86b52 JD	232	start_lttng_sessiond
	233
	234	#tests=( test_kernel_1000_local_snapshots )
086e6add MD	235	tests=( test_kernel_local_snapshot
	236	test_kernel_local_snapshot_after_stop
	237	test_kernel_local_snapshot_append_to_metadata
	238	test_kernel_local_snapshot_discard
	239	test_kernel_local_snapshot_overwrite_small_buffers
	240	test_kernel_1000_local_snapshots
	241	)
07b86b52 JD	242
	243	for fct_test in ${tests[@]};
	244	do
	245	SESSION_NAME=$(randstring 16 0)
	246	${fct_test}
	247
	248	done
	249
	250	stop_lttng_sessiond
	251	}