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