test: add basic memory pressure extended test for oomd
Simple test to generate a lot of pressure in one unit and assert that systemd-oomd kills the right one.
This commit is contained in:
Anita Zhang
parent
018b6f4548
commit
e4ff80404a
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../TEST-01-BASIC/Makefile
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#!/usr/bin/env bash
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set -e
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TEST_DESCRIPTION="systemd-oomd Memory Pressure Test"
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. $TEST_BASE_DIR/test-functions
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check_result_nspawn() {
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local ret=1
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local journald_report=""
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local pids=""
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[[ -e $1/testok ]] && ret=0
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if [[ -e $1/skipped ]]; then
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echo "TEST-56-OOMD was skipped:"
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cat $1/skipped
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ret=0
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fi
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[[ -f $1/failed ]] && cp -a $1/failed $TESTDIR
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save_journal $1/var/log/journal
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[[ -f $TESTDIR/failed ]] && cat $TESTDIR/failed
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echo $JOURNAL_LIST
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test -s $TESTDIR/failed && ret=$(($ret+1))
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[ -n "$TIMED_OUT" ] && ret=$(($ret+1))
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check_asan_reports "$1" || ret=$(($ret+1))
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_umount_dir $initdir
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return $ret
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}
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check_result_qemu() {
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local ret=1
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mount_initdir
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[[ -e $initdir/testok ]] && ret=0
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if [[ -e $initdir/skipped ]]; then
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echo "TEST-56-OOMD was skipped:"
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cat $initdir/skipped
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ret=0
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fi
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[[ -f $initdir/failed ]] && cp -a $initdir/failed $TESTDIR
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save_journal $initdir/var/log/journal
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check_asan_reports "$initdir" || ret=$(($ret+1))
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_umount_dir $initdir
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[[ -f $TESTDIR/failed ]] && cat $TESTDIR/failed
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echo $JOURNAL_LIST
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test -s $TESTDIR/failed && ret=$(($ret+1))
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[ -n "$TIMED_OUT" ] && ret=$(($ret+1))
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return $ret
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}
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do_test "$@" 56
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@ -65,6 +65,7 @@ BASICTOOLS=(
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echo
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env
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false
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getconf
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getent
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getfacl
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grep
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#!/usr/bin/env bash
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set -eu -o pipefail
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PAGE_SIZE=$(getconf PAGE_SIZE)
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BLOAT_ITERATION_TARGET=$(( 100 << 20 )) # 100 MB
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BLOAT_HOLDER=()
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PID="$$"
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function bloat {
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local set_size=$(cat "/proc/$PID/statm" | cut -d " " -f2)
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local mem_usage=$(( "$set_size" * "$PAGE_SIZE" ))
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local target_mem_size=$(( "$mem_usage" + "$1" ))
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BLOAT_HOLDER=()
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while [[ "$mem_usage" -lt "$target_mem_size" ]]; do
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echo "target $target_mem_size"
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echo "mem usage $mem_usage"
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BLOAT_HOLDER+=( $(printf "%0.sg" {1..1000000}) )
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set_size=$(cat "/proc/$PID/statm" | cut -d " " -f2)
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mem_usage=$(( "$set_size" * "$PAGE_SIZE" ))
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done
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}
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function run {
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local arr=()
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while [[ true ]]; do
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bloat "$BLOAT_ITERATION_TARGET"
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arr+=( "$BLOAT_HOLDER" )
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sleep 1
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done
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}
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run
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[Unit]
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Description=TESTSUITE-56-OOMD
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[Service]
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ExecStartPre=rm -f /failed /skipped /testok
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ExecStart=/usr/lib/systemd/tests/testdata/units/%N.sh
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Type=oneshot
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#!/usr/bin/env bash
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set -ex
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set -o pipefail
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systemd-analyze log-level debug
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systemd-analyze log-target console
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# Loose checks to ensure the environment has the necessary features for systemd-oomd
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[[ "$( awk '/SwapTotal/ { print $2 }' /proc/meminfo )" != "0" ]] || echo "no swap" >> /skipped
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[[ -e /proc/pressure ]] || echo "no PSI" >> /skipped
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cgroup_type=$(stat -fc %T /sys/fs/cgroup/)
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if [[ "$cgroup_type" != *"cgroup2"* ]] && [[ "$cgroup_type" != *"0x63677270"* ]]; then
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echo "no cgroup2" >> /skipped
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fi
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[[ -e /skipped ]] && exit 0 || true
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cat > /etc/systemd/system/testworkload.slice <<EOF
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[Slice]
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CPUAccounting=true
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MemoryAccounting=true
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IOAccounting=true
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TasksAccounting=true
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ManagedOOMMemoryPressure=kill
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ManagedOOMMemoryPressureLimitPercent=50%
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EOF
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# Create a lot of memory pressure by setting memory.high to a very small value
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cat > /etc/systemd/system/testbloat.service <<EOF
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[Service]
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MemoryHigh=2M
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Slice=testworkload.slice
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ExecStart=/usr/lib/systemd/tests/testdata/units/testsuite-56-slowgrowth.sh
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EOF
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# This generates no memory pressure
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cat > /etc/systemd/system/testchill.service <<EOF
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[Service]
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MemoryHigh=2M
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Slice=testworkload.slice
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ExecStart=sleep infinity
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EOF
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systemctl daemon-reload
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systemctl start testbloat.service
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systemctl start testchill.service
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# Verify systemd-oomd is monitoring the expected units
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oomctl | grep "/testworkload.slice"
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oomctl | grep "50%"
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# systemd-oomd watches for elevated pressure for 30 seconds before acting.
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# It can take time to build up pressure so either wait 5 minutes or for the service to fail.
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timeout=$(date -ud "5 minutes" +%s)
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while [[ $(date -u +%s) -le $timeout ]]; do
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if ! systemctl status testbloat.service; then
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break
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fi
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sleep 15
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done
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# testbloat should be killed and testchill should be fine
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if systemctl status testbloat.service; then exit 42; fi
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if ! systemctl status testchill.service; then exit 24; fi
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systemd-analyze log-level info
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echo OK > /testok
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exit 0
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