Commit f77811a0 authored by Ammy Yi's avatar Ammy Yi Committed by Arnaldo Carvalho de Melo

perf test: test_intel_pt.sh: Add 9 tests

Add tests:
	Test with MTC and TSC disabled
	Test with branches disabled
	Test with/without CYC
	Test recording with sample mode
	Test with kernel trace
	Test virtual LBR
	Test power events
	Test with TNT packets disabled
	Test with event_trace

These tests mostly check that perf record works with the corresponding
Intel PT config terms, sometimes also checking that certain packets do or
do not appear in the resulting trace as appropriate.

The "Test virtual LBR" is slightly trickier, using a Python script to
check that branch stacks are actually synthesized.
Signed-off-by: default avatarAmmy Yi <ammy.yi@intel.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-8-adrian.hunter@intel.comSigned-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 89b15d00
...@@ -23,6 +23,7 @@ errfile="${temp_dir}/test-err.txt" ...@@ -23,6 +23,7 @@ errfile="${temp_dir}/test-err.txt"
workload="${temp_dir}/workload" workload="${temp_dir}/workload"
awkscript="${temp_dir}/awkscript" awkscript="${temp_dir}/awkscript"
jitdump_workload="${temp_dir}/jitdump_workload" jitdump_workload="${temp_dir}/jitdump_workload"
maxbrstack="${temp_dir}/maxbrstack.py"
cleanup() cleanup()
{ {
...@@ -422,7 +423,7 @@ test_jitdump() ...@@ -422,7 +423,7 @@ test_jitdump()
# Should be no errors # Should be no errors
if [ "${decode_err_cnt}" -ne 0 ] ; then if [ "${decode_err_cnt}" -ne 0 ] ; then
echo "Decode failed, ${decode_err_cnt} errors" echo "Decode failed, ${decode_err_cnt} errors"
perf script -i "${perfdatafile}" --itrace=e-o-l perf script -i "${perfdatafile}" --itrace=e-o-l --show-mmap-events | cat
return 1 return 1
fi fi
...@@ -430,6 +431,189 @@ test_jitdump() ...@@ -430,6 +431,189 @@ test_jitdump()
return 0 return 0
} }
test_packet_filter()
{
echo "--- Test with MTC and TSC disabled ---"
# Disable MTC and TSC
perf_record_no_decode -o "${perfdatafile}" -e intel_pt/mtc=0,tsc=0/u uname
# Should not get MTC packet
mtc_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "MTC 0x")
if [ "${mtc_cnt}" -ne 0 ] ; then
echo "Failed to filter with mtc=0"
return 1
fi
# Should not get TSC package
tsc_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "TSC 0x")
if [ "${tsc_cnt}" -ne 0 ] ; then
echo "Failed to filter with tsc=0"
return 1
fi
echo OK
return 0
}
test_disable_branch()
{
echo "--- Test with branches disabled ---"
# Disable branch
perf_record_no_decode -o "${perfdatafile}" -e intel_pt/branch=0/u uname
# Should not get branch related packets
tnt_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "TNT 0x")
tip_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "TIP 0x")
fup_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "FUP 0x")
if [ "${tnt_cnt}" -ne 0 ] || [ "${tip_cnt}" -ne 0 ] || [ "${fup_cnt}" -ne 0 ] ; then
echo "Failed to disable branches"
return 1
fi
echo OK
return 0
}
test_time_cyc()
{
echo "--- Test with/without CYC ---"
# Check if CYC is supported
cyc=$(cat /sys/bus/event_source/devices/intel_pt/caps/psb_cyc)
if [ "${cyc}" != "1" ] ; then
echo "SKIP: CYC is not supported"
return 2
fi
# Enable CYC
perf_record_no_decode -o "${perfdatafile}" -e intel_pt/cyc/u uname
# should get CYC packets
cyc_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "CYC 0x")
if [ "${cyc_cnt}" = "0" ] ; then
echo "Failed to get CYC packet"
return 1
fi
# Without CYC
perf_record_no_decode -o "${perfdatafile}" -e intel_pt//u uname
# Should not get CYC packets
cyc_cnt=$(perf script -i "${perfdatafile}" -D 2>/dev/null | grep -c "CYC 0x")
if [ "${cyc_cnt}" -gt 0 ] ; then
echo "Still get CYC packet without cyc"
return 1
fi
echo OK
return 0
}
test_sample()
{
echo "--- Test recording with sample mode ---"
# Check if recording with sample mode is working
if ! perf_record_no_decode -o "${perfdatafile}" --aux-sample=8192 -e '{intel_pt//u,branch-misses:u}' uname ; then
echo "perf record failed with --aux-sample"
return 1
fi
echo OK
return 0
}
test_kernel_trace()
{
echo "--- Test with kernel trace ---"
# Check if recording with kernel trace is working
can_kernel || return 2
if ! perf_record_no_decode -o "${perfdatafile}" -e intel_pt//k -m1,128 uname ; then
echo "perf record failed with intel_pt//k"
return 1
fi
echo OK
return 0
}
test_virtual_lbr()
{
echo "--- Test virtual LBR ---"
# Python script to determine the maximum size of branch stacks
cat << "_end_of_file_" > "${maxbrstack}"
from __future__ import print_function
bmax = 0
def process_event(param_dict):
if "brstack" in param_dict:
brstack = param_dict["brstack"]
n = len(brstack)
global bmax
if n > bmax:
bmax = n
def trace_end():
print("max brstack", bmax)
_end_of_file_
# Check if virtual lbr is working
perf_record_no_bpf -o "${perfdatafile}" --aux-sample -e '{intel_pt//,cycles}:u' uname
times_val=$(perf script -i "${perfdatafile}" --itrace=L -s "${maxbrstack}" 2>/dev/null | grep "max brstack " | cut -d " " -f 3)
case "${times_val}" in
[0-9]*) ;;
*) times_val=0;;
esac
if [ "${times_val}" -lt 2 ] ; then
echo "Failed with virtual lbr"
return 1
fi
echo OK
return 0
}
test_power_event()
{
echo "--- Test power events ---"
# Check if power events are supported
power_event=$(cat /sys/bus/event_source/devices/intel_pt/caps/power_event_trace)
if [ "${power_event}" != "1" ] ; then
echo "SKIP: power_event_trace is not supported"
return 2
fi
if ! perf_record_no_decode -o "${perfdatafile}" -a -e intel_pt/pwr_evt/u uname ; then
echo "perf record failed with pwr_evt"
return 1
fi
echo OK
return 0
}
test_no_tnt()
{
echo "--- Test with TNT packets disabled ---"
# Check if TNT disable is supported
notnt=$(cat /sys/bus/event_source/devices/intel_pt/caps/tnt_disable)
if [ "${notnt}" != "1" ] ; then
echo "SKIP: tnt_disable is not supported"
return 2
fi
perf_record_no_decode -o "${perfdatafile}" -e intel_pt/notnt/u uname
# Should be no TNT packets
tnt_cnt=$(perf script -i "${perfdatafile}" -D | grep -c TNT)
if [ "${tnt_cnt}" -ne 0 ] ; then
echo "TNT packets still there after notnt"
return 1
fi
echo OK
return 0
}
test_event_trace()
{
echo "--- Test with event_trace ---"
# Check if event_trace is supported
event_trace=$(cat /sys/bus/event_source/devices/intel_pt/caps/event_trace)
if [ "${event_trace}" != 1 ] ; then
echo "SKIP: event_trace is not supported"
return 2
fi
if ! perf_record_no_decode -o "${perfdatafile}" -e intel_pt/event/u uname ; then
echo "perf record failed with event trace"
return 1
fi
echo OK
return 0
}
count_result() count_result()
{ {
if [ "$1" -eq 2 ] ; then if [ "$1" -eq 2 ] ; then
...@@ -448,6 +632,15 @@ test_system_wide_side_band || ret=$? ; count_result $ret ; ret=0 ...@@ -448,6 +632,15 @@ test_system_wide_side_band || ret=$? ; count_result $ret ; ret=0
test_per_thread "" "" || ret=$? ; count_result $ret ; ret=0 test_per_thread "" "" || ret=$? ; count_result $ret ; ret=0
test_per_thread "k" "(incl. kernel) " || ret=$? ; count_result $ret ; ret=0 test_per_thread "k" "(incl. kernel) " || ret=$? ; count_result $ret ; ret=0
test_jitdump || ret=$? ; count_result $ret ; ret=0 test_jitdump || ret=$? ; count_result $ret ; ret=0
test_packet_filter || ret=$? ; count_result $ret ; ret=0
test_disable_branch || ret=$? ; count_result $ret ; ret=0
test_time_cyc || ret=$? ; count_result $ret ; ret=0
test_sample || ret=$? ; count_result $ret ; ret=0
test_kernel_trace || ret=$? ; count_result $ret ; ret=0
test_virtual_lbr || ret=$? ; count_result $ret ; ret=0
test_power_event || ret=$? ; count_result $ret ; ret=0
test_no_tnt || ret=$? ; count_result $ret ; ret=0
test_event_trace || ret=$? ; count_result $ret ; ret=0
cleanup cleanup
......
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