dgrove@google.com
977977e6ea
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9 260f80e4-7a28-3924-810f-c04153c831b5
60 lines
1.6 KiB
Bash
60 lines
1.6 KiB
Bash
#!/bin/bash
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#
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# Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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# This file is repsonsible for performing the averag and standard deviation
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# for a specific metrics over a given set of metrics in a file.
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# This should be included in other compiler scripts, or used through
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# sample_metrics.sh
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AVERAGE=0
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STDEV=0
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COUNT=0
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function do_math_return() {
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local sum=0
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local count=0
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local time
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for time in $2
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do
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sum=$(echo "$sum + $time" | bc -l)
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(( count++ ))
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done
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average=$(echo "$sum / $count" | bc -l)
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#echo "count=$count, sum=$sum, average=$average"
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#go over the numbers, take the difference from the average and squart, then square root / count.
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sum_dev=0
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for time in $2
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do
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step=$(echo "$time - $average" | bc -l)
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sum_dev=$(echo "$sum_dev + $step^2" | bc -l)
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done
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step=$(echo "$sum_dev / $count" | bc -l)
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OUT="sqrt(${step})"
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standard_dev=$(echo $OUT | bc -l | sed 's/\([0-9]*\.[0-9][0-9]\)[0-9]*/\1/')
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average=$(echo $average | sed 's/\([0-9]*\.[0-9][0-9]\)[0-9]*/\1/')
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AVERAGE=$average
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STDEV=$standard_dev
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COUNT=$count
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}
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function do_math() {
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do_math_return "$1" "$2"
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echo "$1: average: $AVERAGE stdev: $STDEV count: $COUNT"
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}
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function sample_file_return() {
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TIMES=$(sed -n "s/$2\S*\s*:\s*\(\([0-9]*\)\(\.[0-9]*\)\?\)/\1/p" $3)
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do_math_return "$1" "$TIMES"
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SAMPLE_LINE="$1: average: $AVERAGE stdev: $STDEV count: $COUNT"
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}
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function sample_file() {
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TIMES=$(sed -n "s/$2\S*\s*:\s*\(\([0-9]*\)\(\.[0-9]*\)\?\)/\1/p" $3)
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do_math "$1" "$TIMES"
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}
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