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63 lines
1.6 KiB
63 lines
1.6 KiB
3 months ago
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#!/bin/bash
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# An utility for tuning the LibUCW radix sorter threshold
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# (c) 2007 Martin Mares <mj@ucw.cz>
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set -e
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UCW_PROGNAME="$0"
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. lib/libucw.sh
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# Path to LibUCW build directory
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[ -n "$BUILD" ] || BUILD=..
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[ -f "$BUILD/ucw/sorter/sorter.h" ] || die "BUILD does not point to LibUCW build directory"
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# Find out sort buffer size
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parse-config 'Sorter{##SortBuffer}'
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SORTBUF=$CF_Sorter_SortBuffer
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[ "$SORTBUF" -gt 0 ] || die "Unable to determine SortBuffer"
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log "Detected sort buffer size $SORTBUF"
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# Find out radix-sorter width
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[ -f "$BUILD/obj/config.mk" ] || die "LibUCW source not configured"
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WIDTH=`sed <$BUILD/obj/config.mk 's/^CONFIG_UCW_RADIX_SORTER_BITS=\(.*\)/\1/;t;d'`
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[ -n "$WIDTH" ] || die "CONFIG_UCW_RADIX_SORTER_BITS not set (!?)"
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log "Detected radix-sorter width $WIDTH"
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# Maximum size of the test -- should be slightly less than a half of SortBuffer
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SIZE=$(($SORTBUF/2 - 8192))
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# Which sort-test test we try
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TEST="2"
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# Which thresholds we try
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THRS="16"
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T=$SIZE
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while [ $T -gt 100 ] ; do
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THRS="$THRS $T"
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T=$(($T/2))
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done
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if true ; then
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rm -f tmp/radix-*
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echo "sizes" >tmp/radix-sizes
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while [ $SIZE -gt 262144 ] ; do
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echo $SIZE >>tmp/radix-sizes
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for T in $THRS ; do
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log "Trying size $SIZE with threshold $T"
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$BUILD/obj/ucw/sorter/sort-test -SSorter.RadixThreshold=$T -s$SIZE -t$TEST -v 2>&1 | tee -a tmp/radix-$T
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done
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SIZE=$(($SIZE/2))
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done
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fi
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FILES=tmp/radix-sizes
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for T in $THRS ; do
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a=tmp/radix-$T
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echo >$a.out $T
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sed 's/.* \([0-9.]\+\)s internal sorting.*/\1/;t;d' <$a >>$a.out
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FILES="$FILES $a.out"
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done
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log "These are the results:"
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paste $FILES
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