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linux/tools/testing/selftests/cgroup/test_cpuset_prs.sh
Waiman Long 46c521bac5 cgroup/cpuset: Enable invalid to valid local partition transition 
When a local partition becomes invalid, it won't transition back to
valid partition automatically if a proper "cpuset.cpus.exclusive" or
"cpuset.cpus" change is made. Instead, system administrators have to
explicitly echo "root" or "isolated" into the "cpuset.cpus.partition"
file at the partition root.

This patch now enables the automatic transition of an invalid local
partition back to valid when there is a proper "cpuset.cpus.exclusive"
or "cpuset.cpus" change.

Automatic transition of an invalid remote partition to a valid one,
however, is not covered by this patch. They still need an explicit
write to "cpuset.cpus.partition" to become valid again.

The test_cpuset_prs.sh test script is updated to add new test cases to
test this automatic state transition.

Reported-by: Pierre Gondois <pierre.gondois@arm.com>
Link: https://lore.kernel.org/lkml/9777f0d2-2fdf-41cb-bd01-19c52939ef42@arm.com
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2023-10-04 08:54:40 -10:00

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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Test for cpuset v2 partition root state (PRS)
#
# The sched verbose flag can be optionally set so that the console log
# can be examined for the correct setting of scheduling domain.
#
skip_test() {
echo "$1"
echo "Test SKIPPED"
exit 4 # ksft_skip
}
[[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!"
# Get wait_inotify location
WAIT_INOTIFY=$(cd $(dirname $0); pwd)/wait_inotify
# Find cgroup v2 mount point
CGROUP2=$(mount -t cgroup2 | head -1 | awk -e '{print $3}')
[[ -n "$CGROUP2" ]] || skip_test "Cgroup v2 mount point not found!"
SUBPARTS_CPUS=$CGROUP2/.__DEBUG__.cpuset.cpus.subpartitions
CPULIST=$(cat $CGROUP2/cpuset.cpus.effective)
NR_CPUS=$(lscpu | grep "^CPU(s):" | sed -e "s/.*:[[:space:]]*//")
[[ $NR_CPUS -lt 8 ]] && skip_test "Test needs at least 8 cpus available!"
# Set verbose flag and delay factor
PROG=$1
VERBOSE=0
DELAY_FACTOR=1
SCHED_DEBUG=
while [[ "$1" = -* ]]
do
case "$1" in
-v) ((VERBOSE++))
# Enable sched/verbose can slow thing down
[[ $DELAY_FACTOR -eq 1 ]] &&
DELAY_FACTOR=2
;;
-d) DELAY_FACTOR=$2
shift
;;
*) echo "Usage: $PROG [-v] [-d <delay-factor>"
exit
;;
esac
shift
done
# Set sched verbose flag if available when "-v" option is specified
if [[ $VERBOSE -gt 0 && -d /sys/kernel/debug/sched ]]
then
# Used to restore the original setting during cleanup
SCHED_DEBUG=$(cat /sys/kernel/debug/sched/verbose)
echo Y > /sys/kernel/debug/sched/verbose
fi
cd $CGROUP2
echo +cpuset > cgroup.subtree_control
#
# If cpuset has been set up and used in child cgroups, we may not be able to
# create partition under root cgroup because of the CPU exclusivity rule.
# So we are going to skip the test if this is the case.
#
[[ -d test ]] || mkdir test
echo 0-6 > test/cpuset.cpus
echo root > test/cpuset.cpus.partition
cat test/cpuset.cpus.partition | grep -q invalid
RESULT=$?
echo member > test/cpuset.cpus.partition
echo "" > test/cpuset.cpus
[[ $RESULT -eq 0 ]] && skip_test "Child cgroups are using cpuset!"
cleanup()
{
online_cpus
cd $CGROUP2
rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1
rmdir test > /dev/null 2>&1
[[ -n "$SCHED_DEBUG" ]] &&
echo "$SCHED_DEBUG" > /sys/kernel/debug/sched/verbose
}
# Pause in ms
pause()
{
DELAY=$1
LOOP=0
while [[ $LOOP -lt $DELAY_FACTOR ]]
do
sleep $DELAY
((LOOP++))
done
return 0
}
console_msg()
{
MSG=$1
echo "$MSG"
echo "" > /dev/console
echo "$MSG" > /dev/console
pause 0.01
}
test_partition()
{
EXPECTED_VAL=$1
echo $EXPECTED_VAL > cpuset.cpus.partition
[[ $? -eq 0 ]] || exit 1
ACTUAL_VAL=$(cat cpuset.cpus.partition)
[[ $ACTUAL_VAL != $EXPECTED_VAL ]] && {
echo "cpuset.cpus.partition: expect $EXPECTED_VAL, found $ACTUAL_VAL"
echo "Test FAILED"
exit 1
}
}
test_effective_cpus()
{
EXPECTED_VAL=$1
ACTUAL_VAL=$(cat cpuset.cpus.effective)
[[ "$ACTUAL_VAL" != "$EXPECTED_VAL" ]] && {
echo "cpuset.cpus.effective: expect '$EXPECTED_VAL', found '$ACTUAL_VAL'"
echo "Test FAILED"
exit 1
}
}
# Adding current process to cgroup.procs as a test
test_add_proc()
{
OUTSTR="$1"
ERRMSG=$((echo $$ > cgroup.procs) |& cat)
echo $ERRMSG | grep -q "$OUTSTR"
[[ $? -ne 0 ]] && {
echo "cgroup.procs: expect '$OUTSTR', got '$ERRMSG'"
echo "Test FAILED"
exit 1
}
echo $$ > $CGROUP2/cgroup.procs # Move out the task
}
#
# Testing the new "isolated" partition root type
#
test_isolated()
{
cd $CGROUP2/test
echo 2-3 > cpuset.cpus
TYPE=$(cat cpuset.cpus.partition)
[[ $TYPE = member ]] || echo member > cpuset.cpus.partition
console_msg "Change from member to root"
test_partition root
console_msg "Change from root to isolated"
test_partition isolated
console_msg "Change from isolated to member"
test_partition member
console_msg "Change from member to isolated"
test_partition isolated
console_msg "Change from isolated to root"
test_partition root
console_msg "Change from root to member"
test_partition member
#
# Testing partition root with no cpu
#
console_msg "Distribute all cpus to child partition"
echo +cpuset > cgroup.subtree_control
test_partition root
mkdir A1
cd A1
echo 2-3 > cpuset.cpus
test_partition root
test_effective_cpus 2-3
cd ..
test_effective_cpus ""
console_msg "Moving task to partition test"
test_add_proc "No space left"
cd A1
test_add_proc ""
cd ..
console_msg "Shrink and expand child partition"
cd A1
echo 2 > cpuset.cpus
cd ..
test_effective_cpus 3
cd A1
echo 2-3 > cpuset.cpus
cd ..
test_effective_cpus ""
# Cleaning up
console_msg "Cleaning up"
echo $$ > $CGROUP2/cgroup.procs
[[ -d A1 ]] && rmdir A1
}
#
# Cpuset controller state transition test matrix.
#
# Cgroup test hierarchy
#
# root -- A1 -- A2 -- A3
# +- B1
#
# P<v> = set cpus.partition (0:member, 1:root, 2:isolated)
# C<l> = add cpu-list to cpuset.cpus
# X<l> = add cpu-list to cpuset.cpus.exclusive
# S<p> = use prefix in subtree_control
# T = put a task into cgroup
# O<c>=<v> = Write <v> to CPU online file of <c>
#
SETUP_A123_PARTITIONS="C1-3:P1:S+ C2-3:P1:S+ C3:P1"
TEST_MATRIX=(
# old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate ISOLCPUS
# ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------ --------
" C0-1 . . C2-3 S+ C4-5 . . 0 A2:0-1"
" C0-1 . . C2-3 P1 . . . 0 "
" C0-1 . . C2-3 P1:S+ C0-1:P1 . . 0 "
" C0-1 . . C2-3 P1:S+ C1:P1 . . 0 "
" C0-1:S+ . . C2-3 . . . P1 0 "
" C0-1:P1 . . C2-3 S+ C1 . . 0 "
" C0-1:P1 . . C2-3 S+ C1:P1 . . 0 "
" C0-1:P1 . . C2-3 S+ C1:P1 . P1 0 "
" C0-1:P1 . . C2-3 C4-5 . . . 0 A1:4-5"
" C0-1:P1 . . C2-3 S+:C4-5 . . . 0 A1:4-5"
" C0-1 . . C2-3:P1 . . . C2 0 "
" C0-1 . . C2-3:P1 . . . C4-5 0 B1:4-5"
"C0-3:P1:S+ C2-3:P1 . . . . . . 0 A1:0-1,A2:2-3"
"C0-3:P1:S+ C2-3:P1 . . C1-3 . . . 0 A1:1,A2:2-3"
"C2-3:P1:S+ C3:P1 . . C3 . . . 0 A1:,A2:3 A1:P1,A2:P1"
"C2-3:P1:S+ C3:P1 . . C3 P0 . . 0 A1:3,A2:3 A1:P1,A2:P0"
"C2-3:P1:S+ C2:P1 . . C2-4 . . . 0 A1:3-4,A2:2"
"C2-3:P1:S+ C3:P1 . . C3 . . C0-2 0 A1:,B1:0-2 A1:P1,A2:P1"
"$SETUP_A123_PARTITIONS . C2-3 . . . 0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
# CPU offlining cases:
" C0-1 . . C2-3 S+ C4-5 . O2=0 0 A1:0-1,B1:3"
"C0-3:P1:S+ C2-3:P1 . . O2=0 . . . 0 A1:0-1,A2:3"
"C0-3:P1:S+ C2-3:P1 . . O2=0 O2=1 . . 0 A1:0-1,A2:2-3"
"C0-3:P1:S+ C2-3:P1 . . O1=0 . . . 0 A1:0,A2:2-3"
"C0-3:P1:S+ C2-3:P1 . . O1=0 O1=1 . . 0 A1:0-1,A2:2-3"
"C2-3:P1:S+ C3:P1 . . O3=0 O3=1 . . 0 A1:2,A2:3 A1:P1,A2:P1"
"C2-3:P1:S+ C3:P2 . . O3=0 O3=1 . . 0 A1:2,A2:3 A1:P1,A2:P2"
"C2-3:P1:S+ C3:P1 . . O2=0 O2=1 . . 0 A1:2,A2:3 A1:P1,A2:P1"
"C2-3:P1:S+ C3:P2 . . O2=0 O2=1 . . 0 A1:2,A2:3 A1:P1,A2:P2"
"C2-3:P1:S+ C3:P1 . . O2=0 . . . 0 A1:,A2:3 A1:P1,A2:P1"
"C2-3:P1:S+ C3:P1 . . O3=0 . . . 0 A1:2,A2: A1:P1,A2:P1"
"C2-3:P1:S+ C3:P1 . . T:O2=0 . . . 0 A1:3,A2:3 A1:P1,A2:P-1"
"C2-3:P1:S+ C3:P1 . . . T:O3=0 . . 0 A1:2,A2:2 A1:P1,A2:P-1"
"$SETUP_A123_PARTITIONS . O1=0 . . . 0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . O2=0 . . . 0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . O3=0 . . . 0 A1:1,A2:2,A3: A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . T:O1=0 . . . 0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
"$SETUP_A123_PARTITIONS . . T:O2=0 . . 0 A1:1,A2:3,A3:3 A1:P1,A2:P1,A3:P-1"
"$SETUP_A123_PARTITIONS . . . T:O3=0 . 0 A1:1,A2:2,A3:2 A1:P1,A2:P1,A3:P-1"
"$SETUP_A123_PARTITIONS . T:O1=0 O1=1 . . 0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . . T:O2=0 O2=1 . 0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . . . T:O3=0 O3=1 0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . T:O1=0 O2=0 O1=1 . 0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
"$SETUP_A123_PARTITIONS . T:O1=0 O2=0 O2=1 . 0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
# old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate ISOLCPUS
# ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------ --------
#
# Remote partition and cpuset.cpus.exclusive tests
#
" C0-3:S+ C1-3:S+ C2-3 . X2-3 . . . 0 A1:0-3,A2:1-3,A3:2-3,XA1:2-3"
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X2-3:P2 . . 0 A1:0-1,A2:2-3,A3:2-3 A1:P0,A2:P2 2-3"
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X3:P2 . . 0 A1:0-2,A2:3,A3:3 A1:P0,A2:P2 3"
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X2-3 X2-3:P2 . 0 A1:0-1,A2:1,A3:2-3 A1:P0,A3:P2 2-3"
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X2-3 X2-3:P2:C3 . 0 A1:0-2,A2:1-2,A3:3 A1:P0,A3:P2 3"
" C0-3:S+ C1-3:S+ C2-3 C2-3 . . . P2 0 A1:0-3,A2:1-3,A3:2-3,B1:2-3 A1:P0,A3:P0,B1:P-2"
" C0-3:S+ C1-3:S+ C2-3 C4-5 . . . P2 0 B1:4-5 B1:P2 4-5"
" C0-3:S+ C1-3:S+ C2-3 C4 X2-3 X2-3 X2-3:P2 P2 0 A3:2-3,B1:4 A3:P2,B1:P2 2-4"
" C0-3:S+ C1-3:S+ C2-3 C4 X2-3 X2-3 X2-3:P2:C1-3 P2 0 A3:2-3,B1:4 A3:P2,B1:P2 2-4"
" C0-3:S+ C1-3:S+ C2-3 C4 X1-3 X1-3:P2 P2 . 0 A2:1,A3:2-3 A2:P2,A3:P2 1-3"
" C0-3:S+ C1-3:S+ C2-3 C4 X2-3 X2-3 X2-3:P2 P2:C4-5 0 A3:2-3,B1:4-5 A3:P2,B1:P2 2-5"
# Nested remote/local partition tests
" C0-3:S+ C1-3:S+ C2-3 C4-5 X2-3 X2-3:P1 P2 P1 0 A1:0-1,A2:,A3:2-3,B1:4-5 \
A1:P0,A2:P1,A3:P2,B1:P1 2-3"
" C0-3:S+ C1-3:S+ C2-3 C4 X2-3 X2-3:P1 P2 P1 0 A1:0-1,A2:,A3:2-3,B1:4 \
A1:P0,A2:P1,A3:P2,B1:P1 2-4"
" C0-3:S+ C1-3:S+ C3 C4 X2-3 X2-3:P1 P2 P1 0 A1:0-1,A2:2,A3:3,B1:4 \
A1:P0,A2:P1,A3:P2,B1:P1 2-4"
" C0-4:S+ C1-4:S+ C2-4 . X2-4 X2-4:P2 X4:P1 . 0 A1:0-1,A2:2-3,A3:4 \
A1:P0,A2:P2,A3:P1 2-4"
" C0-4:X2-4:S+ C1-4:X2-4:S+:P2 C2-4:X4:P1 \
. . X5 . . 0 A1:0-4,A2:1-4,A3:2-4 \
A1:P0,A2:P-2,A3:P-1 ."
" C0-4:X2-4:S+ C1-4:X2-4:S+:P2 C2-4:X4:P1 \
. . . X1 . 0 A1:0-1,A2:2-4,A3:2-4 \
A1:P0,A2:P2,A3:P-1 2-4"
# Remote partition offline tests
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X2-3 X2-3:P2:O2=0 . 0 A1:0-1,A2:1,A3:3 A1:P0,A3:P2 2-3"
" C0-3:S+ C1-3:S+ C2-3 . X2-3 X2-3 X2-3:P2:O2=0 O2=1 0 A1:0-1,A2:1,A3:2-3 A1:P0,A3:P2 2-3"
" C0-3:S+ C1-3:S+ C3 . X2-3 X2-3 P2:O3=0 . 0 A1:0-2,A2:1-2,A3: A1:P0,A3:P2 3"
" C0-3:S+ C1-3:S+ C3 . X2-3 X2-3 T:P2:O3=0 . 0 A1:0-2,A2:1-2,A3:1-2 A1:P0,A3:P-2 3"
# An invalidated remote partition cannot self-recover from hotplug
" C0-3:S+ C1-3:S+ C2 . X2-3 X2-3 T:P2:O2=0 O2=1 0 A1:0-3,A2:1-3,A3:2 A1:P0,A3:P-2"
# cpus.exclusive.effective clearing test
" C0-3:S+ C1-3:S+ C2 . X2-3:X . . . 0 A1:0-3,A2:1-3,A3:2,XA1:"
# Invalid to valid remote partition transition test
" C0-3:S+ C1-3 . . . X3:P2 . . 0 A1:0-3,A2:1-3,XA2: A2:P-2"
" C0-3:S+ C1-3:X3:P2
. . X2-3 P2 . . 0 A1:0-2,A2:3,XA2:3 A2:P2 3"
# Invalid to valid local partition direct transition tests
" C1-3:S+:P2 C2-3:X1:P2 . . . . . . 0 A1:1-3,XA1:1-3,A2:2-3:XA2: A1:P2,A2:P-2 1-3"
" C1-3:S+:P2 C2-3:X1:P2 . . . X3:P2 . . 0 A1:1-2,XA1:1-3,A2:3:XA2:3 A1:P2,A2:P2 1-3"
" C0-3:P2 . . C4-6 C0-4 . . . 0 A1:0-4,B1:4-6 A1:P-2,B1:P0"
" C0-3:P2 . . C4-6 C0-4:C0-3 . . . 0 A1:0-3,B1:4-6 A1:P2,B1:P0 0-3"
" C0-3:P2 . . C3-5:C4-5 . . . . 0 A1:0-3,B1:4-5 A1:P2,B1:P0 0-3"
# Local partition invalidation tests
" C0-3:X1-3:S+:P2 C1-3:X2-3:S+:P2 C2-3:X3:P2 \
. . . . . 0 A1:1,A2:2,A3:3 A1:P2,A2:P2,A3:P2 1-3"
" C0-3:X1-3:S+:P2 C1-3:X2-3:S+:P2 C2-3:X3:P2 \
. . X4 . . 0 A1:1-3,A2:1-3,A3:2-3,XA2:,XA3: A1:P2,A2:P-2,A3:P-2 1-3"
" C0-3:X1-3:S+:P2 C1-3:X2-3:S+:P2 C2-3:X3:P2 \
. . C4 . . 0 A1:1-3,A2:1-3,A3:2-3,XA2:,XA3: A1:P2,A2:P-2,A3:P-2 1-3"
# Local partition CPU change tests
" C0-5:S+:P2 C4-5:S+:P1 . . . C3-5 . . 0 A1:0-2,A2:3-5 A1:P2,A2:P1 0-2"
" C0-5:S+:P2 C4-5:S+:P1 . . C1-5 . . . 0 A1:1-3,A2:4-5 A1:P2,A2:P1 1-3"
# cpus_allowed/exclusive_cpus update tests
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3 \
. C4 . P2 . 0 A1:4,A2:4,XA2:,XA3:,A3:4 \
A1:P0,A3:P-2 ."
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3 \
. X1 . P2 . 0 A1:0-3,A2:1-3,XA1:1,XA2:,XA3:,A3:2-3 \
A1:P0,A3:P-2 ."
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3 \
. . C3 P2 . 0 A1:0-2,A2:0-2,XA2:3,XA3:3,A3:3 \
A1:P0,A3:P2 3"
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3 \
. . X3 P2 . 0 A1:0-2,A2:1-2,XA2:3,XA3:3,A3:3 \
A1:P0,A3:P2 3"
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3:P2 \
. . X3 . . 0 A1:0-3,A2:1-3,XA2:3,XA3:3,A3:2-3 \
A1:P0,A3:P-2 ."
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3:P2 \
. . C3 . . 0 A1:0-3,A2:3,XA2:3,XA3:3,A3:3 \
A1:P0,A3:P-2 ."
" C0-3:X2-3:S+ C1-3:X2-3:S+ C2-3:X2-3:P2 \
. C4 . . . 0 A1:4,A2:4,A3:4,XA1:,XA2:,XA3 \
A1:P0,A3:P-2 ."
# old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate ISOLCPUS
# ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------ --------
#
# Incorrect change to cpuset.cpus invalidates partition root
#
# Adding CPUs to partition root that are not in parent's
# cpuset.cpus is allowed, but those extra CPUs are ignored.
"C2-3:P1:S+ C3:P1 . . . C2-4 . . 0 A1:,A2:2-3 A1:P1,A2:P1"
# Taking away all CPUs from parent or itself if there are tasks
# will make the partition invalid.
"C2-3:P1:S+ C3:P1 . . T C2-3 . . 0 A1:2-3,A2:2-3 A1:P1,A2:P-1"
" C3:P1:S+ C3 . . T P1 . . 0 A1:3,A2:3 A1:P1,A2:P-1"
"$SETUP_A123_PARTITIONS . T:C2-3 . . . 0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
"$SETUP_A123_PARTITIONS . T:C2-3:C1-3 . . . 0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
# Changing a partition root to member makes child partitions invalid
"C2-3:P1:S+ C3:P1 . . P0 . . . 0 A1:2-3,A2:3 A1:P0,A2:P-1"
"$SETUP_A123_PARTITIONS . C2-3 P0 . . 0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P0,A3:P-1"
# cpuset.cpus can contains cpus not in parent's cpuset.cpus as long
# as they overlap.
"C2-3:P1:S+ . . . . C3-4:P1 . . 0 A1:2,A2:3 A1:P1,A2:P1"
# Deletion of CPUs distributed to child cgroup is allowed.
"C0-1:P1:S+ C1 . C2-3 C4-5 . . . 0 A1:4-5,A2:4-5"
# To become a valid partition root, cpuset.cpus must overlap parent's
# cpuset.cpus.
" C0-1:P1 . . C2-3 S+ C4-5:P1 . . 0 A1:0-1,A2:0-1 A1:P1,A2:P-1"
# Enabling partition with child cpusets is allowed
" C0-1:S+ C1 . C2-3 P1 . . . 0 A1:0-1,A2:1 A1:P1"
# A partition root with non-partition root parent is invalid, but it
# can be made valid if its parent becomes a partition root too.
" C0-1:S+ C1 . C2-3 . P2 . . 0 A1:0-1,A2:1 A1:P0,A2:P-2"
" C0-1:S+ C1:P2 . C2-3 P1 . . . 0 A1:0,A2:1 A1:P1,A2:P2"
# A non-exclusive cpuset.cpus change will invalidate partition and its siblings
" C0-1:P1 . . C2-3 C0-2 . . . 0 A1:0-2,B1:2-3 A1:P-1,B1:P0"
" C0-1:P1 . . P1:C2-3 C0-2 . . . 0 A1:0-2,B1:2-3 A1:P-1,B1:P-1"
" C0-1 . . P1:C2-3 C0-2 . . . 0 A1:0-2,B1:2-3 A1:P0,B1:P-1"
# old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate ISOLCPUS
# ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------ --------
# Failure cases:
# A task cannot be added to a partition with no cpu
"C2-3:P1:S+ C3:P1 . . O2=0:T . . . 1 A1:,A2:3 A1:P1,A2:P1"
# Changes to cpuset.cpus.exclusive that violate exclusivity rule is rejected
" C0-3 . . C4-5 X0-3 . . X3-5 1 A1:0-3,B1:4-5"
)
#
# Write to the cpu online file
# $1 - <c>=<v> where <c> = cpu number, <v> value to be written
#
write_cpu_online()
{
CPU=${1%=*}
VAL=${1#*=}
CPUFILE=//sys/devices/system/cpu/cpu${CPU}/online
if [[ $VAL -eq 0 ]]
then
OFFLINE_CPUS="$OFFLINE_CPUS $CPU"
else
[[ -n "$OFFLINE_CPUS" ]] && {
OFFLINE_CPUS=$(echo $CPU $CPU $OFFLINE_CPUS | fmt -1 |\
sort | uniq -u)
}
fi
echo $VAL > $CPUFILE
pause 0.01
}
#
# Set controller state
# $1 - cgroup directory
# $2 - state
# $3 - showerr
#
# The presence of ":" in state means transition from one to the next.
#
set_ctrl_state()
{
TMPMSG=/tmp/.msg_$$
CGRP=$1
STATE=$2
SHOWERR=${3}
CTRL=${CTRL:=$CONTROLLER}
HASERR=0
REDIRECT="2> $TMPMSG"
[[ -z "$STATE" || "$STATE" = '.' ]] && return 0
[[ $VERBOSE -gt 0 ]] && SHOWERR=1
rm -f $TMPMSG
for CMD in $(echo $STATE | sed -e "s/:/ /g")
do
TFILE=$CGRP/cgroup.procs
SFILE=$CGRP/cgroup.subtree_control
PFILE=$CGRP/cpuset.cpus.partition
CFILE=$CGRP/cpuset.cpus
XFILE=$CGRP/cpuset.cpus.exclusive
S=$(expr substr $CMD 1 1)
if [[ $S = S ]]
then
PREFIX=${CMD#?}
COMM="echo ${PREFIX}${CTRL} > $SFILE"
eval $COMM $REDIRECT
elif [[ $S = X ]]
then
CPUS=${CMD#?}
COMM="echo $CPUS > $XFILE"
eval $COMM $REDIRECT
elif [[ $S = C ]]
then
CPUS=${CMD#?}
COMM="echo $CPUS > $CFILE"
eval $COMM $REDIRECT
elif [[ $S = P ]]
then
VAL=${CMD#?}
case $VAL in
0) VAL=member
;;
1) VAL=root
;;
2) VAL=isolated
;;
*)
echo "Invalid partition state - $VAL"
exit 1
;;
esac
COMM="echo $VAL > $PFILE"
eval $COMM $REDIRECT
elif [[ $S = O ]]
then
VAL=${CMD#?}
write_cpu_online $VAL
elif [[ $S = T ]]
then
COMM="echo 0 > $TFILE"
eval $COMM $REDIRECT
fi
RET=$?
[[ $RET -ne 0 ]] && {
[[ -n "$SHOWERR" ]] && {
echo "$COMM"
cat $TMPMSG
}
HASERR=1
}
pause 0.01
rm -f $TMPMSG
done
return $HASERR
}
set_ctrl_state_noerr()
{
CGRP=$1
STATE=$2
[[ -d $CGRP ]] || mkdir $CGRP
set_ctrl_state $CGRP $STATE 1
[[ $? -ne 0 ]] && {
echo "ERROR: Failed to set $2 to cgroup $1!"
exit 1
}
}
online_cpus()
{
[[ -n "OFFLINE_CPUS" ]] && {
for C in $OFFLINE_CPUS
do
write_cpu_online ${C}=1
done
}
}
#
# Return 1 if the list of effective cpus isn't the same as the initial list.
#
reset_cgroup_states()
{
echo 0 > $CGROUP2/cgroup.procs
online_cpus
rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1
pause 0.02
set_ctrl_state . R-
pause 0.01
}
dump_states()
{
for DIR in . A1 A1/A2 A1/A2/A3 B1
do
CPUS=$DIR/cpuset.cpus
ECPUS=$DIR/cpuset.cpus.effective
XCPUS=$DIR/cpuset.cpus.exclusive
XECPUS=$DIR/cpuset.cpus.exclusive.effective
PRS=$DIR/cpuset.cpus.partition
PCPUS=$DIR/.__DEBUG__.cpuset.cpus.subpartitions
[[ -e $CPUS ]] && echo "$CPUS: $(cat $CPUS)"
[[ -e $XCPUS ]] && echo "$XCPUS: $(cat $XCPUS)"
[[ -e $ECPUS ]] && echo "$ECPUS: $(cat $ECPUS)"
[[ -e $XECPUS ]] && echo "$XECPUS: $(cat $XECPUS)"
[[ -e $PRS ]] && echo "$PRS: $(cat $PRS)"
[[ -e $PCPUS ]] && echo "$PCPUS: $(cat $PCPUS)"
done
}
#
# Check effective cpus
# $1 - check string, format: <cgroup>:<cpu-list>[,<cgroup>:<cpu-list>]*
#
check_effective_cpus()
{
CHK_STR=$1
for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
do
set -- $(echo $CHK | sed -e "s/:/ /g")
CGRP=$1
CPUS=$2
if [[ $CGRP = X* ]]
then
CGRP=${CGRP#X}
FILE=cpuset.cpus.exclusive.effective
else
FILE=cpuset.cpus.effective
fi
[[ $CGRP = A2 ]] && CGRP=A1/A2
[[ $CGRP = A3 ]] && CGRP=A1/A2/A3
[[ -e $CGRP/$FILE ]] || return 1
[[ $CPUS = $(cat $CGRP/$FILE) ]] || return 1
done
}
#
# Check cgroup states
# $1 - check string, format: <cgroup>:<state>[,<cgroup>:<state>]*
#
check_cgroup_states()
{
CHK_STR=$1
for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
do
set -- $(echo $CHK | sed -e "s/:/ /g")
CGRP=$1
STATE=$2
FILE=
EVAL=$(expr substr $STATE 2 2)
[[ $CGRP = A2 ]] && CGRP=A1/A2
[[ $CGRP = A3 ]] && CGRP=A1/A2/A3
case $STATE in
P*) FILE=$CGRP/cpuset.cpus.partition
;;
*) echo "Unknown state: $STATE!"
exit 1
;;
esac
VAL=$(cat $FILE)
case "$VAL" in
member) VAL=0
;;
root) VAL=1
;;
isolated)
VAL=2
;;
"root invalid"*)
VAL=-1
;;
"isolated invalid"*)
VAL=-2
;;
esac
[[ $EVAL != $VAL ]] && return 1
done
return 0
}
#
# Get isolated (including offline) CPUs by looking at
# /sys/kernel/debug/sched/domains and compare that with the expected value.
#
# Note that a sched domain of just 1 CPU will be considered isolated.
#
# $1 - expected isolated cpu list
#
check_isolcpus()
{
EXPECT_VAL=$1
ISOLCPUS=
LASTISOLCPU=
SCHED_DOMAINS=/sys/kernel/debug/sched/domains
[[ -d $SCHED_DOMAINS ]] || return 0
[[ $EXPECT_VAL = . ]] && EXPECT_VAL=
for ((CPU=0; CPU < $NR_CPUS; CPU++))
do
[[ -n "$(ls ${SCHED_DOMAINS}/cpu$CPU)" ]] && continue
if [[ -z "$LASTISOLCPU" ]]
then
ISOLCPUS=$CPU
LASTISOLCPU=$CPU
elif [[ "$LASTISOLCPU" -eq $((CPU - 1)) ]]
then
echo $ISOLCPUS | grep -q "\<$LASTISOLCPU\$"
if [[ $? -eq 0 ]]
then
ISOLCPUS=${ISOLCPUS}-
fi
LASTISOLCPU=$CPU
else
if [[ $ISOLCPUS = *- ]]
then
ISOLCPUS=${ISOLCPUS}$LASTISOLCPU
fi
ISOLCPUS=${ISOLCPUS},$CPU
LASTISOLCPU=$CPU
fi
done
[[ "$ISOLCPUS" = *- ]] && ISOLCPUS=${ISOLCPUS}$LASTISOLCPU
[[ "$EXPECT_VAL" = "$ISOLCPUS" ]]
}
test_fail()
{
TESTNUM=$1
TESTTYPE=$2
ADDINFO=$3
echo "Test $TEST[$TESTNUM] failed $TESTTYPE check!"
[[ -n "$ADDINFO" ]] && echo "*** $ADDINFO ***"
eval echo \${$TEST[$I]}
echo
dump_states
exit 1
}
#
# Run cpuset state transition test
# $1 - test matrix name
#
# This test is somewhat fragile as delays (sleep x) are added in various
# places to make sure state changes are fully propagated before the next
# action. These delays may need to be adjusted if running in a slower machine.
#
run_state_test()
{
TEST=$1
CONTROLLER=cpuset
I=0
eval CNT="\${#$TEST[@]}"
reset_cgroup_states
console_msg "Running state transition test ..."
while [[ $I -lt $CNT ]]
do
echo "Running test $I ..." > /dev/console
[[ $VERBOSE -gt 1 ]] && {
echo ""
eval echo \${$TEST[$I]}
}
eval set -- "\${$TEST[$I]}"
OLD_A1=$1
OLD_A2=$2
OLD_A3=$3
OLD_B1=$4
NEW_A1=$5
NEW_A2=$6
NEW_A3=$7
NEW_B1=$8
RESULT=$9
ECPUS=${10}
STATES=${11}
ICPUS=${12}
set_ctrl_state_noerr B1 $OLD_B1
set_ctrl_state_noerr A1 $OLD_A1
set_ctrl_state_noerr A1/A2 $OLD_A2
set_ctrl_state_noerr A1/A2/A3 $OLD_A3
RETVAL=0
set_ctrl_state A1 $NEW_A1; ((RETVAL += $?))
set_ctrl_state A1/A2 $NEW_A2; ((RETVAL += $?))
set_ctrl_state A1/A2/A3 $NEW_A3; ((RETVAL += $?))
set_ctrl_state B1 $NEW_B1; ((RETVAL += $?))
[[ $RETVAL -ne $RESULT ]] && test_fail $I result
[[ -n "$ECPUS" && "$ECPUS" != . ]] && {
check_effective_cpus $ECPUS
[[ $? -ne 0 ]] && test_fail $I "effective CPU"
}
[[ -n "$STATES" && "$STATES" != . ]] && {
check_cgroup_states $STATES
[[ $? -ne 0 ]] && test_fail $I states
}
# Compare the expected isolated CPUs with the actual ones,
# if available
[[ -n "$ICPUS" ]] && {
check_isolcpus $ICPUS
[[ $? -ne 0 ]] && test_fail $I "isolated CPU" \
"Expect $ICPUS, get $ISOLCPUS instead"
}
reset_cgroup_states
#
# Check to see if effective cpu list changes
#
NEWLIST=$(cat cpuset.cpus.effective)
RETRY=0
while [[ $NEWLIST != $CPULIST && $RETRY -lt 5 ]]
do
# Wait a bit longer & recheck a few times
pause 0.01
((RETRY++))
NEWLIST=$(cat cpuset.cpus.effective)
done
[[ $NEWLIST != $CPULIST ]] && {
echo "Effective cpus changed to $NEWLIST after test $I!"
exit 1
}
[[ $VERBOSE -gt 0 ]] && echo "Test $I done."
((I++))
done
echo "All $I tests of $TEST PASSED."
}
#
# Wait for inotify event for the given file and read it
# $1: cgroup file to wait for
# $2: file to store the read result
#
wait_inotify()
{
CGROUP_FILE=$1
OUTPUT_FILE=$2
$WAIT_INOTIFY $CGROUP_FILE
cat $CGROUP_FILE > $OUTPUT_FILE
}
#
# Test if inotify events are properly generated when going into and out of
# invalid partition state.
#
test_inotify()
{
ERR=0
PRS=/tmp/.prs_$$
cd $CGROUP2/test
[[ -f $WAIT_INOTIFY ]] || {
echo "wait_inotify not found, inotify test SKIPPED."
return
}
pause 0.01
echo 1 > cpuset.cpus
echo 0 > cgroup.procs
echo root > cpuset.cpus.partition
pause 0.01
rm -f $PRS
wait_inotify $PWD/cpuset.cpus.partition $PRS &
pause 0.01
set_ctrl_state . "O1=0"
pause 0.01
check_cgroup_states ".:P-1"
if [[ $? -ne 0 ]]
then
echo "FAILED: Inotify test - partition not invalid"
ERR=1
elif [[ ! -f $PRS ]]
then
echo "FAILED: Inotify test - event not generated"
ERR=1
kill %1
elif [[ $(cat $PRS) != "root invalid"* ]]
then
echo "FAILED: Inotify test - incorrect state"
cat $PRS
ERR=1
fi
online_cpus
echo member > cpuset.cpus.partition
echo 0 > ../cgroup.procs
if [[ $ERR -ne 0 ]]
then
exit 1
else
echo "Inotify test PASSED"
fi
}
trap cleanup 0 2 3 6
run_state_test TEST_MATRIX
test_isolated
test_inotify
echo "All tests PASSED."
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