diff options
Diffstat (limited to 'tools/perf/tests/shell/stat+shadow_stat.sh')
| -rwxr-xr-x | tools/perf/tests/shell/stat+shadow_stat.sh | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/tools/perf/tests/shell/stat+shadow_stat.sh b/tools/perf/tests/shell/stat+shadow_stat.sh index e6e35fc6c882..cabbbf17c662 100755 --- a/tools/perf/tests/shell/stat+shadow_stat.sh +++ b/tools/perf/tests/shell/stat+shadow_stat.sh @@ -1,9 +1,11 @@ -#!/bin/sh +#!/bin/bash # perf stat metrics (shadow stat) test # SPDX-License-Identifier: GPL-2.0 set -e +THRESHOLD=0.015 + # skip if system-wide mode is forbidden perf stat -a true > /dev/null 2>&1 || exit 2 @@ -12,9 +14,9 @@ perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2 test_global_aggr() { - perf stat -a --no-big-num -e cycles,instructions sleep 1 2>&1 | \ + perf stat -a --no-big-num -M insn_per_cycle sleep 1 2>&1 | \ grep -e cycles -e instructions | \ - while read num evt hash ipc rest + while read num evt _ ipc rest do # skip not counted events if [ "$num" = "<not" ]; then @@ -33,19 +35,27 @@ test_global_aggr() fi # use printf for rounding and a leading zero - res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)` + res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` if [ "$ipc" != "$res" ]; then - echo "IPC is different: $res != $ipc ($num / $cyc)" - exit 1 + # check the difference from the real result for FP imperfections + diff=`echo $ipc $res $THRESHOLD | \ + awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'` + + if [ $diff -eq 1 ]; then + echo "IPC is different: $res != $ipc ($num / $cyc)" + exit 1 + fi + + echo "Warning: Difference of IPC is under the threshold" fi done } test_no_aggr() { - perf stat -a -A --no-big-num -e cycles,instructions sleep 1 2>&1 | \ + perf stat -a -A --no-big-num -M insn_per_cycle sleep 1 2>&1 | \ grep ^CPU | \ - while read cpu num evt hash ipc rest + while read cpu num evt _ ipc rest do # skip not counted events if [ "$num" = "<not" ]; then @@ -67,10 +77,18 @@ test_no_aggr() fi # use printf for rounding and a leading zero - res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)` + res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'` if [ "$ipc" != "$res" ]; then - echo "IPC is different for $cpu: $res != $ipc ($num / $cyc)" - exit 1 + # check difference from the real result for FP imperfections + diff=`echo $ipc $res $THRESHOLD | \ + awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'` + + if [ $diff -eq 1 ]; then + echo "IPC is different: $res != $ipc ($num / $cyc)" + exit 1 + fi + + echo "Warning: Difference of IPC is under the threshold" fi done } |