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#!/bin/sh
# perf stat metrics (shadow stat) test
# SPDX-License-Identifier: GPL-2.0
set -e
# skip if system-wide mode is forbidden
perf stat -a true > /dev/null 2>&1 || exit 2
test_global_aggr()
{
local cyc
perf stat -a --no-big-num -e cycles,instructions sleep 1 2>&1 | \
grep -e cycles -e instructions | \
while read num evt hash ipc rest
do
# skip not counted events
if [[ $num == "<not" ]]; then
continue
fi
# save cycles count
if [[ $evt == "cycles" ]]; then
cyc=$num
continue
fi
# skip if no cycles
if [[ -z $cyc ]]; then
continue
fi
# use printf for rounding and a leading zero
local res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)`
if [[ $ipc != $res ]]; then
echo "IPC is different: $res != $ipc ($num / $cyc)"
exit 1
fi
done
}
test_no_aggr()
{
declare -A results
perf stat -a -A --no-big-num -e cycles,instructions sleep 1 2>&1 | \
grep ^CPU | \
while read cpu num evt hash ipc rest
do
# skip not counted events
if [[ $num == "<not" ]]; then
continue
fi
# save cycles count
if [[ $evt == "cycles" ]]; then
results[$cpu]=$num
continue
fi
# skip if no cycles
local cyc=${results[$cpu]}
if [[ -z $cyc ]]; then
continue
fi
# use printf for rounding and a leading zero
local res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)`
if [[ $ipc != $res ]]; then
echo "IPC is different for $cpu: $res != $ipc ($num / $cyc)"
exit 1
fi
done
}
test_global_aggr
test_no_aggr
exit 0
|
