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|
#!/bin/sh
# PCP QA Test No. 1702
# Exercise the bpftrace PMDA - register, start, stop and deregister named scripts
#
seq=`basename $0`
echo "QA output created by $seq"
. ./common.bpftrace
_pmdabpftrace_check
echo "kretprobe:vfs_read" >$tmp.tmp
_pmdabpftrace_check_probes $tmp.tmp
status=1 # failure is the default!
_prepare_pmda bpftrace
trap "_pmdabpftrace_cleanup; exit \$status" 0 1 2 3 15
_stop_auto_restart pmcd
# real QA test starts here
cat <<EOF | _pmdabpftrace_install
# Installed by PCP QA test $seq on `date`
[dynamic_scripts]
enabled = true
auth_enabled = false
EOF
echo "=== start bpftrace script ==="
pmstore bpftrace.control.register "// name: testscript
kretprobe:vfs_read
{
@bytes = hist(retval);
}"
_pmdabpftrace_wait_for_value bpftrace.scripts.testscript.data.bytes
echo "=== check metrics ==="
cat $here/$seq > /dev/null # generate vfs_read syscalls
pmsleep 2 # bpftrace output interval
pminfo -dfmtT bpftrace.scripts.testscript.data.bytes 2>&1 | tee -a $seq_full \
| _instances_filter_any
pid1=$(pminfo -f bpftrace.scripts.testscript.pid | sed -En 's/.*value ([0-9]+)/\1/gp')
echo "=== stop bpftrace script ==="
pmstore -F bpftrace.control.stop testscript
echo "=== verify script is stopped ==="
for i in $(seq 1 30);
do
if ! ps -p $pid1 > /dev/null; then
echo OK
echo "took $i seconds for the bpftrace script to stop" >> $seq_full
break
fi
sleep 1
done
echo "=== start script again ==="
pmstore -F bpftrace.control.start testscript
_pmdabpftrace_wait_for_value bpftrace.scripts.testscript.data.bytes
echo "=== verify current bpftrace PID is different than last PID ==="
pid2=$(pminfo -f bpftrace.scripts.testscript.pid | sed -En 's/.*value ([0-9]+)/\1/gp')
echo "check PID $pid2 != $pid1" >> $seq_full
if [ "$pid2" -ne "$pid1" ]; then
echo "Success: Second PID is different than first PID."
else
echo "Failure: PIDs are equal."
fi
echo "=== deregister bpftrace script ==="
pmstore -F bpftrace.control.deregister testscript
echo "=== check metric has disappeared ==="
pminfo bpftrace.scripts.testscript.data.bytes
echo "=== register two scripts ==="
pmstore bpftrace.control.register "// name: testscript1
kretprobe:vfs_read { @bytes = hist(retval); }"
pmstore bpftrace.control.register "// name: testscript2
kretprobe:vfs_read { @bytes = hist(retval); }"
echo "=== verify two scripts ==="
pminfo -f bpftrace.info.scripts
echo "=== deregister two scripts ==="
pmstore -F bpftrace.control.deregister testscript1,testscript2
echo "=== verify two scripts are deregistered ==="
pminfo -f bpftrace.info.scripts
_pmdabpftrace_remove
status=0
exit
|
