before(when i did not compile udelay_test.ko): sh@ubuntu:~/workspace/compile/tools/time$ sudo ./udelay_test.sh ./udelay_test.sh: line 25: /sys/kernel/debug/udelay_test: Permission denied ./udelay_test.sh: line 26: /sys/kernel/debug/udelay_test: No such file or directory ./udelay_test.sh: line 25: /sys/kernel/debug/udelay_test: Permission denied ./udelay_test.sh: line 26: /sys/kernel/debug/udelay_test: No such file or directory ... about two hundreds lines.
we access '/sys/kernel/debug/udelay_test' the before starting the udelay_test. now(when i did not compile udelay_test.ko): sh@ubuntu:~/workspace/linux-stable/tools/time$ sudo ./udelay_test.sh modprobe: FATAL: Module udelay_test not found in directory /lib/modules/5.4.44 ERROR, can not access /sys/kernel/debug/udelay_test. modprobe: FATAL: Module udelay_test not found. Signed-off-by: Hui Su <sh_...@163.com> --- tools/time/udelay_test.sh | 51 +++++++++++++++++++++++++-------------- 1 file changed, 33 insertions(+), 18 deletions(-) diff --git a/tools/time/udelay_test.sh b/tools/time/udelay_test.sh index 6779d7e55d85..853ba04e4149 100755 --- a/tools/time/udelay_test.sh +++ b/tools/time/udelay_test.sh @@ -12,10 +12,11 @@ MODULE_NAME=udelay_test UDELAY_PATH=/sys/kernel/debug/udelay_test +retcode=0 setup() { - /sbin/modprobe -q $MODULE_NAME + /sbin/modprobe $MODULE_NAME tmp_file=`mktemp` } @@ -31,29 +32,43 @@ cleanup() if [ -f $tmp_file ]; then rm $tmp_file fi - /sbin/modprobe -q -r $MODULE_NAME + /sbin/modprobe -r $MODULE_NAME +} + +debug_file_exist() +{ + if [ ! -d "$UDELAY_PATH" ]; then + return 1 + fi + return 0 } trap cleanup EXIT setup +debug_file_exist -# Delay for a variety of times. -# 1..200, 200..500 (by 10), 500..2000 (by 100) -for (( delay = 1; delay < 200; delay += 1 )); do - test_one $delay -done -for (( delay = 200; delay < 500; delay += 10 )); do - test_one $delay -done -for (( delay = 500; delay <= 2000; delay += 100 )); do - test_one $delay -done - -# Search for failures -count=`grep -c FAIL $tmp_file` -if [ $? -eq "0" ]; then - echo "ERROR: $count delays failed to delay long enough" +if [ $? -eq 1 ]; then retcode=1 + echo "ERROR, can not access $UDELAY_PATH." +else + # Delay for a variety of times. + # 1..200, 200..500 (by 10), 500..2000 (by 100) + for (( delay = 1; delay < 200; delay += 1 )); do + test_one $delay + done + for (( delay = 200; delay < 500; delay += 10 )); do + test_one $delay + done + for (( delay = 500; delay <= 2000; delay += 100 )); do + test_one $delay + done + + # Search for failures + count=`grep -c FAIL $tmp_file` + if [ $? -eq "0" ]; then + echo "ERROR: $count delays failed to delay long enough" + retcode=1 + fi fi exit $retcode -- 2.25.1