76 lines
1.8 KiB
Bash
Executable File
76 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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set -e
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checkflip()
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{
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r=$1
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expect=$2
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s2=$seed
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mib=20
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echo "*** $mib MiB of zeroes, ratio $r ***"
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rmax=-1
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rmin=-1
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rtot=0
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for x in 0 1 2 3 4; do
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ret=`dd if=/dev/zero bs=1048576 count=$mib 2>/dev/null | "$ZZUF" -s $s2 -r $r | "$ZZERO"`
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if [ "$rmax" = -1 -o "$ret" -gt "$rmax" ]; then rmax=$ret; fi
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if [ "$rmin" = -1 -o "$ret" -lt "$rmin" ]; then rmin=$ret; fi
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rtot=`expr $rtot + $ret || true`
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echo " try $x .......... $ret"
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s2=`expr $s2 + 1`
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done
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rmean=`expr '(' $rtot + 2 ')' / 5 || true`
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delta=`expr $rmean - $expect || true`
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if [ "$delta" -gt -5 -a "$delta" -lt 5 ]; then
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result="ok"
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elif [ $(($rmean * 8)) -lt $(($expect * 7)) \
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-o $(($rmean * 7)) -gt $(($expect * 8)) ]; then
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result="FAILED"
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FAILED=$(($FAILED + 1))
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else
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result="ok"
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fi
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TESTED=$(($TESTED + 1))
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echo " expected $expect min/avg/max $rmin/$rmean/$rmax .......... $result"
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}
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DIR="$(dirname "$0")"
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ZZUF="$DIR/../src/zzuf"
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ZZERO="$DIR/zzero"
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if [ ! -f "$ZZERO" ]; then
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echo "error: test/zzero is missing"
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exit 1
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fi
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FAILED=0
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TESTED=0
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if [ -z "$1" ]; then
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seed=$(date | $ZZUF -m 2>/dev/null | cut -f2 -d' ' | tr -d abcdef | cut -b1-8)
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else
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seed="$1"
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fi
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echo "*** running zzuf RNG test suite with seed $seed ***"
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# if X flips are performed on N bits set to 0, the average number of bits
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# set to 1 is: N / 2 * (1 - pow(1 - 2 / N, X)
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checkflip 0.000000001 0
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checkflip 0.00000001 1
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checkflip 0.0000001 16
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checkflip 0.000001 167
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checkflip 0.00001 1677
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checkflip 0.0001 16775
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checkflip 0.001 167604
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checkflip 0.01 1661055
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checkflip 0.1 15205967
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if [ "$FAILED" != 0 ]; then
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echo "*** $FAILED tests failed out of $TESTED ***"
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exit 1
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fi
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echo "*** all $TESTED tests OK ***"
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exit 0
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