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-rw-r--r--tools/testing/selftests/vm/charge_reserved_hugetlb.sh584
1 files changed, 584 insertions, 0 deletions
diff --git a/tools/testing/selftests/vm/charge_reserved_hugetlb.sh b/tools/testing/selftests/vm/charge_reserved_hugetlb.sh
new file mode 100644
index 000000000..0899019a7
--- /dev/null
+++ b/tools/testing/selftests/vm/charge_reserved_hugetlb.sh
@@ -0,0 +1,584 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+set -e
+
+if [[ $(id -u) -ne 0 ]]; then
+ echo "This test must be run as root. Skipping..."
+ exit $ksft_skip
+fi
+
+fault_limit_file=limit_in_bytes
+reservation_limit_file=rsvd.limit_in_bytes
+fault_usage_file=usage_in_bytes
+reservation_usage_file=rsvd.usage_in_bytes
+
+if [[ "$1" == "-cgroup-v2" ]]; then
+ cgroup2=1
+ fault_limit_file=max
+ reservation_limit_file=rsvd.max
+ fault_usage_file=current
+ reservation_usage_file=rsvd.current
+fi
+
+if [[ $cgroup2 ]]; then
+ cgroup_path=$(mount -t cgroup2 | head -1 | awk '{print $3}')
+ if [[ -z "$cgroup_path" ]]; then
+ cgroup_path=/dev/cgroup/memory
+ mount -t cgroup2 none $cgroup_path
+ do_umount=1
+ fi
+ echo "+hugetlb" >$cgroup_path/cgroup.subtree_control
+else
+ cgroup_path=$(mount -t cgroup | grep ",hugetlb" | awk '{print $3}')
+ if [[ -z "$cgroup_path" ]]; then
+ cgroup_path=/dev/cgroup/memory
+ mount -t cgroup memory,hugetlb $cgroup_path
+ do_umount=1
+ fi
+fi
+export cgroup_path
+
+function cleanup() {
+ if [[ $cgroup2 ]]; then
+ echo $$ >$cgroup_path/cgroup.procs
+ else
+ echo $$ >$cgroup_path/tasks
+ fi
+
+ if [[ -e /mnt/huge ]]; then
+ rm -rf /mnt/huge/*
+ umount /mnt/huge || echo error
+ rmdir /mnt/huge
+ fi
+ if [[ -e $cgroup_path/hugetlb_cgroup_test ]]; then
+ rmdir $cgroup_path/hugetlb_cgroup_test
+ fi
+ if [[ -e $cgroup_path/hugetlb_cgroup_test1 ]]; then
+ rmdir $cgroup_path/hugetlb_cgroup_test1
+ fi
+ if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then
+ rmdir $cgroup_path/hugetlb_cgroup_test2
+ fi
+ echo 0 >/proc/sys/vm/nr_hugepages
+ echo CLEANUP DONE
+}
+
+function expect_equal() {
+ local expected="$1"
+ local actual="$2"
+ local error="$3"
+
+ if [[ "$expected" != "$actual" ]]; then
+ echo "expected ($expected) != actual ($actual): $3"
+ cleanup
+ exit 1
+ fi
+}
+
+function get_machine_hugepage_size() {
+ hpz=$(grep -i hugepagesize /proc/meminfo)
+ kb=${hpz:14:-3}
+ mb=$(($kb / 1024))
+ echo $mb
+}
+
+MB=$(get_machine_hugepage_size)
+
+function setup_cgroup() {
+ local name="$1"
+ local cgroup_limit="$2"
+ local reservation_limit="$3"
+
+ mkdir $cgroup_path/$name
+
+ echo writing cgroup limit: "$cgroup_limit"
+ echo "$cgroup_limit" >$cgroup_path/$name/hugetlb.${MB}MB.$fault_limit_file
+
+ echo writing reseravation limit: "$reservation_limit"
+ echo "$reservation_limit" > \
+ $cgroup_path/$name/hugetlb.${MB}MB.$reservation_limit_file
+
+ if [ -e "$cgroup_path/$name/cpuset.cpus" ]; then
+ echo 0 >$cgroup_path/$name/cpuset.cpus
+ fi
+ if [ -e "$cgroup_path/$name/cpuset.mems" ]; then
+ echo 0 >$cgroup_path/$name/cpuset.mems
+ fi
+}
+
+function wait_for_hugetlb_memory_to_get_depleted() {
+ local cgroup="$1"
+ local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
+ # Wait for hugetlbfs memory to get depleted.
+ while [ $(cat $path) != 0 ]; do
+ echo Waiting for hugetlb memory to get depleted.
+ cat $path
+ sleep 0.5
+ done
+}
+
+function wait_for_hugetlb_memory_to_get_reserved() {
+ local cgroup="$1"
+ local size="$2"
+
+ local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
+ # Wait for hugetlbfs memory to get written.
+ while [ $(cat $path) != $size ]; do
+ echo Waiting for hugetlb memory reservation to reach size $size.
+ cat $path
+ sleep 0.5
+ done
+}
+
+function wait_for_hugetlb_memory_to_get_written() {
+ local cgroup="$1"
+ local size="$2"
+
+ local path="$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file"
+ # Wait for hugetlbfs memory to get written.
+ while [ $(cat $path) != $size ]; do
+ echo Waiting for hugetlb memory to reach size $size.
+ cat $path
+ sleep 0.5
+ done
+}
+
+function write_hugetlbfs_and_get_usage() {
+ local cgroup="$1"
+ local size="$2"
+ local populate="$3"
+ local write="$4"
+ local path="$5"
+ local method="$6"
+ local private="$7"
+ local expect_failure="$8"
+ local reserve="$9"
+
+ # Function return values.
+ reservation_failed=0
+ oom_killed=0
+ hugetlb_difference=0
+ reserved_difference=0
+
+ local hugetlb_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file
+ local reserved_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file
+
+ local hugetlb_before=$(cat $hugetlb_usage)
+ local reserved_before=$(cat $reserved_usage)
+
+ echo
+ echo Starting:
+ echo hugetlb_usage="$hugetlb_before"
+ echo reserved_usage="$reserved_before"
+ echo expect_failure is "$expect_failure"
+
+ output=$(mktemp)
+ set +e
+ if [[ "$method" == "1" ]] || [[ "$method" == 2 ]] ||
+ [[ "$private" == "-r" ]] && [[ "$expect_failure" != 1 ]]; then
+
+ bash write_hugetlb_memory.sh "$size" "$populate" "$write" \
+ "$cgroup" "$path" "$method" "$private" "-l" "$reserve" 2>&1 | tee $output &
+
+ local write_result=$?
+ local write_pid=$!
+
+ until grep -q -i "DONE" $output; do
+ echo waiting for DONE signal.
+ if ! ps $write_pid > /dev/null
+ then
+ echo "FAIL: The write died"
+ cleanup
+ exit 1
+ fi
+ sleep 0.5
+ done
+
+ echo ================= write_hugetlb_memory.sh output is:
+ cat $output
+ echo ================= end output.
+
+ if [[ "$populate" == "-o" ]] || [[ "$write" == "-w" ]]; then
+ wait_for_hugetlb_memory_to_get_written "$cgroup" "$size"
+ elif [[ "$reserve" != "-n" ]]; then
+ wait_for_hugetlb_memory_to_get_reserved "$cgroup" "$size"
+ else
+ # This case doesn't produce visible effects, but we still have
+ # to wait for the async process to start and execute...
+ sleep 0.5
+ fi
+
+ echo write_result is $write_result
+ else
+ bash write_hugetlb_memory.sh "$size" "$populate" "$write" \
+ "$cgroup" "$path" "$method" "$private" "$reserve"
+ local write_result=$?
+
+ if [[ "$reserve" != "-n" ]]; then
+ wait_for_hugetlb_memory_to_get_reserved "$cgroup" "$size"
+ fi
+ fi
+ set -e
+
+ if [[ "$write_result" == 1 ]]; then
+ reservation_failed=1
+ fi
+
+ # On linus/master, the above process gets SIGBUS'd on oomkill, with
+ # return code 135. On earlier kernels, it gets actual oomkill, with return
+ # code 137, so just check for both conditions in case we're testing
+ # against an earlier kernel.
+ if [[ "$write_result" == 135 ]] || [[ "$write_result" == 137 ]]; then
+ oom_killed=1
+ fi
+
+ local hugetlb_after=$(cat $hugetlb_usage)
+ local reserved_after=$(cat $reserved_usage)
+
+ echo After write:
+ echo hugetlb_usage="$hugetlb_after"
+ echo reserved_usage="$reserved_after"
+
+ hugetlb_difference=$(($hugetlb_after - $hugetlb_before))
+ reserved_difference=$(($reserved_after - $reserved_before))
+}
+
+function cleanup_hugetlb_memory() {
+ set +e
+ local cgroup="$1"
+ if [[ "$(pgrep -f write_to_hugetlbfs)" != "" ]]; then
+ echo killing write_to_hugetlbfs
+ killall -2 write_to_hugetlbfs
+ wait_for_hugetlb_memory_to_get_depleted $cgroup
+ fi
+ set -e
+
+ if [[ -e /mnt/huge ]]; then
+ rm -rf /mnt/huge/*
+ umount /mnt/huge
+ rmdir /mnt/huge
+ fi
+}
+
+function run_test() {
+ local size=$(($1 * ${MB} * 1024 * 1024))
+ local populate="$2"
+ local write="$3"
+ local cgroup_limit=$(($4 * ${MB} * 1024 * 1024))
+ local reservation_limit=$(($5 * ${MB} * 1024 * 1024))
+ local nr_hugepages="$6"
+ local method="$7"
+ local private="$8"
+ local expect_failure="$9"
+ local reserve="${10}"
+
+ # Function return values.
+ hugetlb_difference=0
+ reserved_difference=0
+ reservation_failed=0
+ oom_killed=0
+
+ echo nr hugepages = "$nr_hugepages"
+ echo "$nr_hugepages" >/proc/sys/vm/nr_hugepages
+
+ setup_cgroup "hugetlb_cgroup_test" "$cgroup_limit" "$reservation_limit"
+
+ mkdir -p /mnt/huge
+ mount -t hugetlbfs -o pagesize=${MB}M,size=256M none /mnt/huge
+
+ write_hugetlbfs_and_get_usage "hugetlb_cgroup_test" "$size" "$populate" \
+ "$write" "/mnt/huge/test" "$method" "$private" "$expect_failure" \
+ "$reserve"
+
+ cleanup_hugetlb_memory "hugetlb_cgroup_test"
+
+ local final_hugetlb=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$fault_usage_file)
+ local final_reservation=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$reservation_usage_file)
+
+ echo $hugetlb_difference
+ echo $reserved_difference
+ expect_equal "0" "$final_hugetlb" "final hugetlb is not zero"
+ expect_equal "0" "$final_reservation" "final reservation is not zero"
+}
+
+function run_multiple_cgroup_test() {
+ local size1="$1"
+ local populate1="$2"
+ local write1="$3"
+ local cgroup_limit1="$4"
+ local reservation_limit1="$5"
+
+ local size2="$6"
+ local populate2="$7"
+ local write2="$8"
+ local cgroup_limit2="$9"
+ local reservation_limit2="${10}"
+
+ local nr_hugepages="${11}"
+ local method="${12}"
+ local private="${13}"
+ local expect_failure="${14}"
+ local reserve="${15}"
+
+ # Function return values.
+ hugetlb_difference1=0
+ reserved_difference1=0
+ reservation_failed1=0
+ oom_killed1=0
+
+ hugetlb_difference2=0
+ reserved_difference2=0
+ reservation_failed2=0
+ oom_killed2=0
+
+ echo nr hugepages = "$nr_hugepages"
+ echo "$nr_hugepages" >/proc/sys/vm/nr_hugepages
+
+ setup_cgroup "hugetlb_cgroup_test1" "$cgroup_limit1" "$reservation_limit1"
+ setup_cgroup "hugetlb_cgroup_test2" "$cgroup_limit2" "$reservation_limit2"
+
+ mkdir -p /mnt/huge
+ mount -t hugetlbfs -o pagesize=${MB}M,size=256M none /mnt/huge
+
+ write_hugetlbfs_and_get_usage "hugetlb_cgroup_test1" "$size1" \
+ "$populate1" "$write1" "/mnt/huge/test1" "$method" "$private" \
+ "$expect_failure" "$reserve"
+
+ hugetlb_difference1=$hugetlb_difference
+ reserved_difference1=$reserved_difference
+ reservation_failed1=$reservation_failed
+ oom_killed1=$oom_killed
+
+ local cgroup1_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$fault_usage_file
+ local cgroup1_reservation_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$reservation_usage_file
+ local cgroup2_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$fault_usage_file
+ local cgroup2_reservation_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$reservation_usage_file
+
+ local usage_before_second_write=$(cat $cgroup1_hugetlb_usage)
+ local reservation_usage_before_second_write=$(cat $cgroup1_reservation_usage)
+
+ write_hugetlbfs_and_get_usage "hugetlb_cgroup_test2" "$size2" \
+ "$populate2" "$write2" "/mnt/huge/test2" "$method" "$private" \
+ "$expect_failure" "$reserve"
+
+ hugetlb_difference2=$hugetlb_difference
+ reserved_difference2=$reserved_difference
+ reservation_failed2=$reservation_failed
+ oom_killed2=$oom_killed
+
+ expect_equal "$usage_before_second_write" \
+ "$(cat $cgroup1_hugetlb_usage)" "Usage changed."
+ expect_equal "$reservation_usage_before_second_write" \
+ "$(cat $cgroup1_reservation_usage)" "Reservation usage changed."
+
+ cleanup_hugetlb_memory
+
+ local final_hugetlb=$(cat $cgroup1_hugetlb_usage)
+ local final_reservation=$(cat $cgroup1_reservation_usage)
+
+ expect_equal "0" "$final_hugetlb" \
+ "hugetlbt_cgroup_test1 final hugetlb is not zero"
+ expect_equal "0" "$final_reservation" \
+ "hugetlbt_cgroup_test1 final reservation is not zero"
+
+ local final_hugetlb=$(cat $cgroup2_hugetlb_usage)
+ local final_reservation=$(cat $cgroup2_reservation_usage)
+
+ expect_equal "0" "$final_hugetlb" \
+ "hugetlb_cgroup_test2 final hugetlb is not zero"
+ expect_equal "0" "$final_reservation" \
+ "hugetlb_cgroup_test2 final reservation is not zero"
+}
+
+cleanup
+
+for populate in "" "-o"; do
+ for method in 0 1 2; do
+ for private in "" "-r"; do
+ for reserve in "" "-n"; do
+
+ # Skip mmap(MAP_HUGETLB | MAP_SHARED). Doesn't seem to be supported.
+ if [[ "$method" == 1 ]] && [[ "$private" == "" ]]; then
+ continue
+ fi
+
+ # Skip populated shmem tests. Doesn't seem to be supported.
+ if [[ "$method" == 2"" ]] && [[ "$populate" == "-o" ]]; then
+ continue
+ fi
+
+ if [[ "$method" == 2"" ]] && [[ "$reserve" == "-n" ]]; then
+ continue
+ fi
+
+ cleanup
+ echo
+ echo
+ echo
+ echo Test normal case.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+ run_test 5 "$populate" "" 10 10 10 "$method" "$private" "0" "$reserve"
+
+ echo Memory charged to hugtlb=$hugetlb_difference
+ echo Memory charged to reservation=$reserved_difference
+
+ if [[ "$populate" == "-o" ]]; then
+ expect_equal "$((5 * $MB * 1024 * 1024))" "$hugetlb_difference" \
+ "Reserved memory charged to hugetlb cgroup."
+ else
+ expect_equal "0" "$hugetlb_difference" \
+ "Reserved memory charged to hugetlb cgroup."
+ fi
+
+ if [[ "$reserve" != "-n" ]] || [[ "$populate" == "-o" ]]; then
+ expect_equal "$((5 * $MB * 1024 * 1024))" "$reserved_difference" \
+ "Reserved memory not charged to reservation usage."
+ else
+ expect_equal "0" "$reserved_difference" \
+ "Reserved memory not charged to reservation usage."
+ fi
+
+ echo 'PASS'
+
+ cleanup
+ echo
+ echo
+ echo
+ echo Test normal case with write.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+ run_test 5 "$populate" '-w' 5 5 10 "$method" "$private" "0" "$reserve"
+
+ echo Memory charged to hugtlb=$hugetlb_difference
+ echo Memory charged to reservation=$reserved_difference
+
+ expect_equal "$((5 * $MB * 1024 * 1024))" "$hugetlb_difference" \
+ "Reserved memory charged to hugetlb cgroup."
+
+ expect_equal "$((5 * $MB * 1024 * 1024))" "$reserved_difference" \
+ "Reserved memory not charged to reservation usage."
+
+ echo 'PASS'
+
+ cleanup
+ continue
+ echo
+ echo
+ echo
+ echo Test more than reservation case.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+
+ if [ "$reserve" != "-n" ]; then
+ run_test "5" "$populate" '' "10" "2" "10" "$method" "$private" "1" \
+ "$reserve"
+
+ expect_equal "1" "$reservation_failed" "Reservation succeeded."
+ fi
+
+ echo 'PASS'
+
+ cleanup
+
+ echo
+ echo
+ echo
+ echo Test more than cgroup limit case.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+
+ # Not sure if shm memory can be cleaned up when the process gets sigbus'd.
+ if [[ "$method" != 2 ]]; then
+ run_test 5 "$populate" "-w" 2 10 10 "$method" "$private" "1" "$reserve"
+
+ expect_equal "1" "$oom_killed" "Not oom killed."
+ fi
+ echo 'PASS'
+
+ cleanup
+
+ echo
+ echo
+ echo
+ echo Test normal case, multiple cgroups.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+ run_multiple_cgroup_test "3" "$populate" "" "10" "10" "5" \
+ "$populate" "" "10" "10" "10" \
+ "$method" "$private" "0" "$reserve"
+
+ echo Memory charged to hugtlb1=$hugetlb_difference1
+ echo Memory charged to reservation1=$reserved_difference1
+ echo Memory charged to hugtlb2=$hugetlb_difference2
+ echo Memory charged to reservation2=$reserved_difference2
+
+ if [[ "$reserve" != "-n" ]] || [[ "$populate" == "-o" ]]; then
+ expect_equal "3" "$reserved_difference1" \
+ "Incorrect reservations charged to cgroup 1."
+
+ expect_equal "5" "$reserved_difference2" \
+ "Incorrect reservation charged to cgroup 2."
+
+ else
+ expect_equal "0" "$reserved_difference1" \
+ "Incorrect reservations charged to cgroup 1."
+
+ expect_equal "0" "$reserved_difference2" \
+ "Incorrect reservation charged to cgroup 2."
+ fi
+
+ if [[ "$populate" == "-o" ]]; then
+ expect_equal "3" "$hugetlb_difference1" \
+ "Incorrect hugetlb charged to cgroup 1."
+
+ expect_equal "5" "$hugetlb_difference2" \
+ "Incorrect hugetlb charged to cgroup 2."
+
+ else
+ expect_equal "0" "$hugetlb_difference1" \
+ "Incorrect hugetlb charged to cgroup 1."
+
+ expect_equal "0" "$hugetlb_difference2" \
+ "Incorrect hugetlb charged to cgroup 2."
+ fi
+ echo 'PASS'
+
+ cleanup
+ echo
+ echo
+ echo
+ echo Test normal case with write, multiple cgroups.
+ echo private=$private, populate=$populate, method=$method, reserve=$reserve
+ run_multiple_cgroup_test "3" "$populate" "-w" "10" "10" "5" \
+ "$populate" "-w" "10" "10" "10" \
+ "$method" "$private" "0" "$reserve"
+
+ echo Memory charged to hugtlb1=$hugetlb_difference1
+ echo Memory charged to reservation1=$reserved_difference1
+ echo Memory charged to hugtlb2=$hugetlb_difference2
+ echo Memory charged to reservation2=$reserved_difference2
+
+ expect_equal "3" "$hugetlb_difference1" \
+ "Incorrect hugetlb charged to cgroup 1."
+
+ expect_equal "3" "$reserved_difference1" \
+ "Incorrect reservation charged to cgroup 1."
+
+ expect_equal "5" "$hugetlb_difference2" \
+ "Incorrect hugetlb charged to cgroup 2."
+
+ expect_equal "5" "$reserved_difference2" \
+ "Incorrected reservation charged to cgroup 2."
+ echo 'PASS'
+
+ cleanup
+
+ done # reserve
+ done # private
+ done # populate
+done # method
+
+if [[ $do_umount ]]; then
+ umount $cgroup_path
+ rmdir $cgroup_path
+fi