run_test_fpu.sh

 1#!/bin/bash
 2# SPDX-License-Identifier: GPL-2.0
 3#
 4# Load kernel module for FPU tests
 5
 6uid=$(id -u)
 7if [ $uid -ne 0 ]; then
 8	echo "$0: Must be run as root"
 9	exit 1
10fi
11
12if ! which modprobe > /dev/null 2>&1; then
13	echo "$0: You need modprobe installed"
14        exit 4
15fi
16
17if ! modinfo test_fpu > /dev/null 2>&1; then
18	echo "$0: You must have the following enabled in your kernel:"
19	echo "CONFIG_TEST_FPU=m"
20	exit 4
21fi
22
23NR_CPUS=$(getconf _NPROCESSORS_ONLN)
24if [ ! $NR_CPUS ]; then
25	NR_CPUS=1
26fi
27
28modprobe test_fpu
29
30if [ ! -e /sys/kernel/debug/selftest_helpers/test_fpu ]; then
31	mount -t debugfs none /sys/kernel/debug
32
33	if [ ! -e /sys/kernel/debug/selftest_helpers/test_fpu ]; then
34		echo "$0: Error mounting debugfs"
35		exit 4
36	fi
37fi
38
39echo "Running 1000 iterations on all CPUs... "
40for i in $(seq 1 1000); do
41	for c in $(seq 1 $NR_CPUS); do
42		./test_fpu &
43	done
44done
45
46rmmod test_fpu