Awk is already called for /sys/block/zram#/mm_stat parsing, so use it
to also perform the floating point capacity vs consumption ratio
calculations. The test output is unchanged.
This allows bc to be dropped as a dependency for the zram selftests.
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
tools/testing/selftests/zram/zram01.sh | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/zram/zram01.sh b/tools/testing/selftests/zram/zram01.sh
index 8f4affe34f3e4..df1b1d4158989 100755
--- a/tools/testing/selftests/zram/zram01.sh
+++ b/tools/testing/selftests/zram/zram01.sh
@@ -33,7 +33,7 @@ zram_algs="lzo"
zram_fill_fs()
{
- for i in $(seq $dev_start $dev_end); do
+ for ((i = $dev_start; i <= $dev_end && !ERR_CODE; i++)); do
echo "fill zram$i..."
local b=0
while [ true ]; do
@@ -44,15 +44,13 @@ zram_fill_fs()
done
echo "zram$i can be filled with '$b' KB"
- local mem_used_total=`awk '{print $3}' "/sys/block/zram$i/mm_stat"`
- local v=$((100 * 1024 * $b / $mem_used_total))
- if [ "$v" -lt 100 ]; then
- echo "FAIL compression ratio: 0.$v:1"
- ERR_CODE=-1
- return
- fi
-
- echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
+ awk -v b="$b" '{ v = (100 * 1024 * b / $3) } END {
+ if (v < 100) {
+ printf "FAIL compression ratio: 0.%u:1\n", v
+ exit 1
+ }
+ printf "zram compression ratio: %.2f:1: OK\n", v / 100
+ }' "/sys/block/zram$i/mm_stat" || ERR_CODE=-1
done
}
--
2.35.3
