107 lines
4.4 KiB
Bash
107 lines
4.4 KiB
Bash
#!/bin/sh
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die() {
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echo "$1 failed"
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echo "Exiting"
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exit $2
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}
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# A linear congruential generator is sufficient for the purpose.
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SEED=3735928559
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LCG() {
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SEED=$(((1103515245 * $SEED + 12345) % 2147483648))
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echo $SEED
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}
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median() {
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# read everything besides the header from file $1
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# | cut-out the required column $2
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# | sort all the entries numerically
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# | show only the first $3 entries
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# | show only the last entry
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tail -n +2 $1 | cut -d' ' -f$2 | sort -n | head -n $3 | tail -n 1
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}
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MPWD=$(dirname $(readlink -f "$0"))
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FILE_NAME="tuning_list"
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TOMMATH_CUTOFFS_H="$MPWD/../tommath_cutoffs.h"
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BACKUP_SUFFIX=".orig"
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RNUM=0
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#############################################################################
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# It would be a good idea to isolate these processes (with e.g.: cpuset) #
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# #
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# It is not a good idea to e.g: watch high resolution videos while this #
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# test are running if you do not have enough memory to avoid page faults. #
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#############################################################################
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# Number of rounds overall.
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LIMIT=100
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# Number of loops for each input.
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RLOOPS=10
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# Offset ( > 0 ) . Runs tests with asymmetric input of the form 1:OFFSET
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# Please use another destination for TOMMATH_CUTOFFS_H if you change OFFSET, because the numbers
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# with an offset different from 1 (one) are not usable as the general cut-off values
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# in "tommath_cutoffs.h".
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OFFSET=1
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# Number ( >= 3 ) of positive results (TC-is-faster) accumulated until it is accepted.
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# Due to the algorithm used to compute the median in this Posix compliant shell script
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# the value needs to be 3 (three), not less, to keep the variation small.
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LAG=3
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# Keep the temporary file $FILE_NAME. Set to 0 (zero) to remove it at the end.
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# The file is in a format fit to feed into R directly. If you do it and find the median
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# of this program to be off by more than a couple: please contact the authors and report
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# the numbers from this program and R and the standard deviation. This program is known
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# to get larger errors if the standard deviation is larger than ~50.
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KEEP_TEMP=1
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echo "You might like to watch the numbers go up to $LIMIT but it will take a long time!"
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# Might not have sufficient rights or disc full.
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echo "km ks tc3m tc3s" > $FILE_NAME || die "Writing header to $FILE_NAME" $?
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i=1
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while [ $i -le $LIMIT ]; do
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RNUM=$(LCG)
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printf "\r%d" $i
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"$MPWD"/tune -t -r $RLOOPS -L $LAG -S "$RNUM" -o $OFFSET >> $FILE_NAME || die "tune" $?
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i=$((i + 1))
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done
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if [ $KEEP_TEMP -eq 0 ]; then
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rm -v $FILE_NAME || die "Removing $KEEP_TEMP" $?
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fi
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echo "Writing cut-off values to \"$TOMMATH_CUTOFFS_H\"."
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echo "In case of failure: a copy of \"$TOMMATH_CUTOFFS_H\" is in \"$TOMMATH_CUTOFFS_H$BACKUP_SUFFIX\""
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cp -v $TOMMATH_CUTOFFS_H $TOMMATH_CUTOFFS_H$BACKUP_SUFFIX || die "Making backup copy of $TOMMATH_CUTOFFS_H" $?
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cat << END_OF_INPUT > $TOMMATH_CUTOFFS_H || die "Writing header to $TOMMATH_CUTOFFS_H" $?
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/* LibTomMath, multiple-precision integer library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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/*
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Current values evaluated on an AMD A8-6600K (64-bit).
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Type "make tune" to optimize them for your machine but
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be aware that it may take a long time. It took 2:30 minutes
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on the aforementioned machine for example.
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*/
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END_OF_INPUT
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# The Posix shell does not offer an array data type so we create
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# the median with 'standard tools'^TM
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# read the file (without the first line) and count the lines
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i=$(tail -n +2 $FILE_NAME | wc -l)
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# our median point will be at $i entries
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i=$(( (i / 2) + 1 ))
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TMP=$(median $FILE_NAME 1 $i)
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echo "#define MP_DEFAULT_MUL_KARATSUBA_CUTOFF $TMP"
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echo "#define MP_DEFAULT_MUL_KARATSUBA_CUTOFF $TMP" >> $TOMMATH_CUTOFFS_H || die "(km) Appending to $TOMMATH_CUTOFFS_H" $?
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TMP=$(median $FILE_NAME 2 $i)
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echo "#define MP_DEFAULT_SQR_KARATSUBA_CUTOFF $TMP"
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echo "#define MP_DEFAULT_SQR_KARATSUBA_CUTOFF $TMP" >> $TOMMATH_CUTOFFS_H || die "(ks) Appending to $TOMMATH_CUTOFFS_H" $?
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TMP=$(median $FILE_NAME 3 $i)
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echo "#define MP_DEFAULT_MUL_TOOM_CUTOFF $TMP"
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echo "#define MP_DEFAULT_MUL_TOOM_CUTOFF $TMP" >> $TOMMATH_CUTOFFS_H || die "(tc3m) Appending to $TOMMATH_CUTOFFS_H" $?
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TMP=$(median $FILE_NAME 4 $i)
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echo "#define MP_DEFAULT_SQR_TOOM_CUTOFF $TMP"
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echo "#define MP_DEFAULT_SQR_TOOM_CUTOFF $TMP" >> $TOMMATH_CUTOFFS_H || die "(tc3s) Appending to $TOMMATH_CUTOFFS_H" $?
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