courgette/analyze_stress_test

   1 #!/bin/bash
   2
   3 # Copyright 2013 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # Produce metrics analyzing the output of a stress test
   8
   9 source "$(dirname ${0})/stress_test_common"
  10
  11 set -e
  12
  13 # Given a token, search for and compute the percentiles from logfile.
  14 compute_percentiles() {
  15   if [ ! -z "${1}" ]; then
  16     local pctls=".5 .9 1"
  17     local lines=$(count_result ${1})
  18     for p in $pctls; do
  19       local count="$(echo "${lines} * $p" | bc -lq | cut -d. -f1)"
  20       echo -n $(cat ${log} \
  21         | grep ${1} \
  22         | cut -d' ' -f2 \
  23         | sort -n \
  24         | head -n$count \
  25         | tail -n1)
  26       echo -n "s "
  27     done
  28   fi
  29 }
  30
  31 main() {
  32   if [ $# -lt 1 ]; then
  33     cat <<EOF
  34
  35 USAGE: $(basename ${0}) logfile
  36
  37 Analyze the logfile of a stress test and produce metrics.
  38
  39 EOF
  40     exit 1
  41   fi
  42
  43   local log="${1}"
  44   if [ ! -f "${log}" ]; then
  45     error "\"${log}\" not found"
  46     exit 1
  47   fi
  48
  49   cat <<EOF
  50 $(count_result "PASS_COURGETTE") successful courgette patches
  51 $(count_result "FAIL_COURGETTE") failed courgette patches
  52 $(count_result "FAIL_DISASSEMBLE") failed to disassemble/assemble
  53 $(count_result "PASS_BSDIFF") succesful bsdiff patches
  54 $(count_result "FAIL_BSDIFF") failed bsdiff patches
  55 $(count_result "BEST_COURGETTE") patch(es) where courgette is smaller (bz2)
  56 $(count_result "BEST_BSDIFF") patch(es) where bsdiff is smaller (xz)
  57 $(count_result "BEST_TIE") patch(es) where both are the same size (bz2)
  58 $(count_result "XZBEST_COURGETTE") patch(es) where courgette (xz) is smaller
  59 $(count_result "XZBEST_BSDIFF") patch(es) where bsdiff is smaller (xz)
  60 $(count_result "XZBEST_TIE") patch(es) where both are the same size (xz)
  61 EOF
  62
  63   # Log file has the format "^SIZE courgette=... bsdiff=..."
  64   local courgette_total="$(cat "${log}" \
  65     | grep "^SIZE " \
  66     | cut -d' ' -f2 \
  67     | awk -F= 'BEGIN{sum=0} {sum += $2} END{print sum}')"
  68   echo "${courgette_total} bytes for a courgette payload (bz2)"
  69
  70   local courgette_total_xz="$(cat "${log}" \
  71     | grep "^SIZE " \
  72     | cut -d' ' -f4 \
  73     | awk -F= 'BEGIN{sum=0} {sum += $2} END{print sum}')"
  74   echo "${courgette_total_xz} bytes for a courgette payload (xz)"
  75
  76   local bsdiff_total="$(cat "${log}" \
  77     | grep "^SIZE " \
  78     | cut -d' ' -f3 \
  79     | awk -F= 'BEGIN{sum=0} {sum += $2} END{print sum}')"
  80   echo "${bsdiff_total} bytes for a bsdiff payload"
  81
  82   local best_total="$(cat "${log}" \
  83     | grep "^BEST_" \
  84     | awk 'BEGIN{sum=0} {sum += $2} END{print sum}')"
  85     echo "${best_total} bytes for a best-choice payload (bz2)"
  86
  87   local best_total_xz="$(cat "${log}" \
  88     | grep "^XZBEST_" \
  89     | awk 'BEGIN{sum=0} {sum += $2} END{print sum}')"
  90     echo "${best_total_xz} bytes for a best-choice payload (xz)"
  91
  92   local pct="$(echo "100*${best_total}/${bsdiff_total}" \
  93     | bc -lq \
  94     | awk '{printf "%.2f\n", $0}')"
  95     echo "${pct}% of a bsdiff-only payload (bz2)"
  96
  97   local pct="$(echo "100*${best_total_xz}/${bsdiff_total}" \
  98     | bc -lq \
  99     | awk '{printf "%.2f\n", $0}')"
 100     echo "${pct}% of a bsdiff-only payload (xz)"
 101
 102   local savings="$((bsdiff_total - best_total))"
 103   echo "${savings} bytes saved by courgette (bz2)"
 104
 105   local savings_xz="$((bsdiff_total - best_total_xz))"
 106   echo "${savings} bytes saved by courgette (xz)"
 107
 108   local pct_savings="$(echo "100*${savings}/${bsdiff_total}" \
 109     | bc -lq \
 110     | awk '{printf "%.2f\n", $0}')"
 111   echo "${pct_savings}% savings (bz2)"
 112
 113   local pct_savings="$(echo "100*${savings_xz}/${bsdiff_total}" \
 114     | bc -lq \
 115     | awk '{printf "%.2f\n", $0}')"
 116   echo "${pct_savings}% savings (xz)"
 117
 118   echo "$(compute_percentiles "TIME_GEN")to generate a patch (50th 90th 100th)"
 119   echo "$(compute_percentiles "TIME_APPLY")to apply a patch (50th 90th 100th)"
 120   echo "$(compute_percentiles "TIME_BSDIFF")for bsdiff (50th 90th 100th)"
 121   echo "$(compute_percentiles "TIME_BSPATCH")for bspatch (50th 90th 100th)"
 122 }
 123
 124 main "${@}"