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-rwxr-xr-xtools/testing/selftests/vm/test_vmalloc.sh176
1 files changed, 176 insertions, 0 deletions
diff --git a/tools/testing/selftests/vm/test_vmalloc.sh b/tools/testing/selftests/vm/test_vmalloc.sh
new file mode 100755
index 000000000..06d2bb109
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+++ b/tools/testing/selftests/vm/test_vmalloc.sh
@@ -0,0 +1,176 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki@gmail.com>
+#
+# This is a test script for the kernel test driver to analyse vmalloc
+# allocator. Therefore it is just a kernel module loader. You can specify
+# and pass different parameters in order to:
+# a) analyse performance of vmalloc allocations;
+# b) stressing and stability check of vmalloc subsystem.
+
+TEST_NAME="vmalloc"
+DRIVER="test_${TEST_NAME}"
+
+# 1 if fails
+exitcode=1
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+#
+# Static templates for performance, stressing and smoke tests.
+# Also it is possible to pass any supported parameters manualy.
+#
+PERF_PARAM="single_cpu_test=1 sequential_test_order=1 test_repeat_count=3"
+SMOKE_PARAM="single_cpu_test=1 test_loop_count=10000 test_repeat_count=10"
+STRESS_PARAM="test_repeat_count=20"
+
+check_test_requirements()
+{
+ uid=$(id -u)
+ if [ $uid -ne 0 ]; then
+ echo "$0: Must be run as root"
+ exit $ksft_skip
+ fi
+
+ if ! which modprobe > /dev/null 2>&1; then
+ echo "$0: You need modprobe installed"
+ exit $ksft_skip
+ fi
+
+ if ! modinfo $DRIVER > /dev/null 2>&1; then
+ echo "$0: You must have the following enabled in your kernel:"
+ echo "CONFIG_TEST_VMALLOC=m"
+ exit $ksft_skip
+ fi
+}
+
+run_perfformance_check()
+{
+ echo "Run performance tests to evaluate how fast vmalloc allocation is."
+ echo "It runs all test cases on one single CPU with sequential order."
+
+ modprobe $DRIVER $PERF_PARAM > /dev/null 2>&1
+ echo "Done."
+ echo "Ccheck the kernel message buffer to see the summary."
+}
+
+run_stability_check()
+{
+ echo "Run stability tests. In order to stress vmalloc subsystem we run"
+ echo "all available test cases on all available CPUs simultaneously."
+ echo "It will take time, so be patient."
+
+ modprobe $DRIVER $STRESS_PARAM > /dev/null 2>&1
+ echo "Done."
+ echo "Check the kernel ring buffer to see the summary."
+}
+
+run_smoke_check()
+{
+ echo "Run smoke test. Note, this test provides basic coverage."
+ echo "Please check $0 output how it can be used"
+ echo "for deep performance analysis as well as stress testing."
+
+ modprobe $DRIVER $SMOKE_PARAM > /dev/null 2>&1
+ echo "Done."
+ echo "Check the kernel ring buffer to see the summary."
+}
+
+usage()
+{
+ echo -n "Usage: $0 [ performance ] | [ stress ] | | [ smoke ] | "
+ echo "manual parameters"
+ echo
+ echo "Valid tests and parameters:"
+ echo
+ modinfo $DRIVER
+ echo
+ echo "Example usage:"
+ echo
+ echo "# Shows help message"
+ echo "./${DRIVER}.sh"
+ echo
+ echo "# Runs 1 test(id_1), repeats it 5 times on all online CPUs"
+ echo "./${DRIVER}.sh run_test_mask=1 test_repeat_count=5"
+ echo
+ echo -n "# Runs 4 tests(id_1|id_2|id_4|id_16) on one CPU with "
+ echo "sequential order"
+ echo -n "./${DRIVER}.sh single_cpu_test=1 sequential_test_order=1 "
+ echo "run_test_mask=23"
+ echo
+ echo -n "# Runs all tests on all online CPUs, shuffled order, repeats "
+ echo "20 times"
+ echo "./${DRIVER}.sh test_repeat_count=20"
+ echo
+ echo "# Performance analysis"
+ echo "./${DRIVER}.sh performance"
+ echo
+ echo "# Stress testing"
+ echo "./${DRIVER}.sh stress"
+ echo
+ exit 0
+}
+
+function validate_passed_args()
+{
+ VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'`
+
+ #
+ # Something has been passed, check it.
+ #
+ for passed_arg in $@; do
+ key=${passed_arg//=*/}
+ val="${passed_arg:$((${#key}+1))}"
+ valid=0
+
+ for valid_arg in $VALID_ARGS; do
+ if [[ $key = $valid_arg ]] && [[ $val -gt 0 ]]; then
+ valid=1
+ break
+ fi
+ done
+
+ if [[ $valid -ne 1 ]]; then
+ echo "Error: key or value is not correct: ${key} $val"
+ exit $exitcode
+ fi
+ done
+}
+
+function run_manual_check()
+{
+ #
+ # Validate passed parameters. If there is wrong one,
+ # the script exists and does not execute further.
+ #
+ validate_passed_args $@
+
+ echo "Run the test with following parameters: $@"
+ modprobe $DRIVER $@ > /dev/null 2>&1
+ echo "Done."
+ echo "Check the kernel ring buffer to see the summary."
+}
+
+function run_test()
+{
+ if [ $# -eq 0 ]; then
+ usage
+ else
+ if [[ "$1" = "performance" ]]; then
+ run_perfformance_check
+ elif [[ "$1" = "stress" ]]; then
+ run_stability_check
+ elif [[ "$1" = "smoke" ]]; then
+ run_smoke_check
+ else
+ run_manual_check $@
+ fi
+ fi
+}
+
+check_test_requirements
+run_test $@
+
+exit 0