Commit a86150f3 authored by Tomas Glozar's avatar Tomas Glozar Committed by Steven Rostedt (Google)
Browse files

rtla/tests: Test setting default options 

Add function to test engine to test with pre-set osnoise options, and
use it to test whether osnoise period (as an example) is set correctly.

The test works by pre-setting a high period of 10 minutes and stop on
threshold. Thus, it is easy to check whether rtla is properly resetting
the period to default: if it is, the test will complete on time, since
the first sample will overflow the threshold. If not, it will time out.

Cc: Luis Goncalves <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-7-tglozar@redhat.com


Signed-off-by: default avatarTomas Glozar <tglozar@redhat.com>
Reviewed-by: default avatarJohn Kacur <jkacur@redhat.com>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent 6c618272

tools/tracing/rtla/tests/engine.sh

+26 −0
Original line number Diff line number Diff line
@@ -61,6 +61,32 @@ check() { 
	fi

}



check_with_osnoise_options() {

	# Do the same as "check", but with pre-set osnoise options.

	# Note: rtla should reset the osnoise options, this is used to test

	# if it indeed does so.

	# Save original arguments

	arg1=$1

	arg2=$2



	# Apply osnoise options (if not dry run)

	if [ -n "$TEST_COUNT" ]

	then

		[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise

		shift

		while shift

		do

			[ "$1" == "" ] && continue

			option=$(echo $1 | cut -d '=' -f 1)

			value=$(echo $1 | cut -d '=' -f 2)

			echo "option: $option, value: $value"

			echo "$value" > "/sys/kernel/tracing/osnoise/$option" || return 1

		done

	fi



	NO_RESET_OSNOISE=1 check "$arg1" "$arg2"

}



set_timeout() {

	TIMEOUT="timeout -v -k 15s $1"

}

tools/tracing/rtla/tests/osnoise.t

+6 −0
Original line number Diff line number Diff line
@@ -16,4 +16,10 @@ check "verify the --trace param" \ 
check "verify the --entries/-E param" \

	"osnoise hist -P F:1 -c 0 -r 900000 -d 1M -b 10 -E 25"



# Test setting default period by putting an absurdly high period

# and stopping on threshold.

# If default period is not set, this will time out.

check_with_osnoise_options "apply default period" \

	"osnoise hist -s 1" period_us=600000000



test_end