t/perf/perf-lib.sh

   1 # Performance testing framework.  Each perf script starts much like
   2 # a normal test script, except it sources this library instead of
   3 # test-lib.sh.  See t/perf/README for documentation.
   4 #
   5 # Copyright (c) 2011 Thomas Rast
   6 #
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see http://www.gnu.org/licenses/ .
  19
  20 # do the --tee work early; it otherwise confuses our careful
  21 # GIT_BUILD_DIR mangling
  22 case "$GIT_TEST_TEE_STARTED, $* " in
  23 done,*)
  24         # do not redirect again
  25         ;;
  26 *' --tee '*|*' --va'*)
  27         mkdir -p test-results
  28         BASE=test-results/$(basename "$0" .sh)
  29         (GIT_TEST_TEE_STARTED=done ${SHELL-sh} "$0" "$@" 2>&1;
  30          echo $? > $BASE.exit) | tee $BASE.out
  31         test "$(cat $BASE.exit)" = 0
  32         exit
  33         ;;
  34 esac
  35
  36 TEST_DIRECTORY=$(pwd)/..
  37 TEST_OUTPUT_DIRECTORY=$(pwd)
  38 if test -z "$GIT_TEST_INSTALLED"; then
  39         perf_results_prefix=
  40 else
  41         perf_results_prefix=$(printf "%s" "${GIT_TEST_INSTALLED%/bin-wrappers}" | tr -c "[a-zA-Z0-9]" "[_*]")"."
  42         # make the tested dir absolute
  43         GIT_TEST_INSTALLED=$(cd "$GIT_TEST_INSTALLED" && pwd)
  44 fi
  45
  46 TEST_NO_CREATE_REPO=t
  47 TEST_NO_MALLOC_CHECK=t
  48
  49 . ../test-lib.sh
  50
  51 # Variables from test-lib that are normally internal to the tests; we
  52 # need to export them for test_perf subshells
  53 export TEST_DIRECTORY TRASH_DIRECTORY GIT_BUILD_DIR GIT_TEST_CMP
  54
  55 perf_results_dir=$TEST_OUTPUT_DIRECTORY/test-results
  56 mkdir -p "$perf_results_dir"
  57 rm -f "$perf_results_dir"/$(basename "$0" .sh).subtests
  58
  59 if test -z "$GIT_PERF_REPEAT_COUNT"; then
  60         GIT_PERF_REPEAT_COUNT=3
  61 fi
  62 die_if_build_dir_not_repo () {
  63         if ! ( cd "$TEST_DIRECTORY/.." &&
  64                     git rev-parse --build-dir >/dev/null 2>&1 ); then
  65                 error "No $1 defined, and your build directory is not a repo"
  66         fi
  67 }
  68
  69 if test -z "$GIT_PERF_REPO"; then
  70         die_if_build_dir_not_repo '$GIT_PERF_REPO'
  71         GIT_PERF_REPO=$TEST_DIRECTORY/..
  72 fi
  73 if test -z "$GIT_PERF_LARGE_REPO"; then
  74         die_if_build_dir_not_repo '$GIT_PERF_LARGE_REPO'
  75         GIT_PERF_LARGE_REPO=$TEST_DIRECTORY/..
  76 fi
  77
  78 test_perf_create_repo_from () {
  79         test "$#" = 2 ||
  80         error "bug in the test script: not 2 parameters to test-create-repo"
  81         repo="$1"
  82         source="$2"
  83         source_git=$source/$(cd "$source" && git rev-parse --git-dir)
  84         mkdir -p "$repo/.git"
  85         (
  86                 cd "$repo/.git" &&
  87                 { cp -Rl "$source_git/objects" . 2>/dev/null ||
  88                         cp -R "$source_git/objects" .; } &&
  89                 for stuff in "$source_git"/*; do
  90                         case "$stuff" in
  91                                 */objects|*/hooks|*/config)
  92                                         ;;
  93                                 *)
  94                                         cp -R "$stuff" . || break
  95                                         ;;
  96                         esac
  97                 done &&
  98                 cd .. &&
  99                 git init -q &&
 100                 mv .git/hooks .git/hooks-disabled 2>/dev/null
 101         ) || error "failed to copy repository '$source' to '$repo'"
 102 }
 103
 104 # call at least one of these to establish an appropriately-sized repository
 105 test_perf_default_repo () {
 106         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
 107 }
 108 test_perf_large_repo () {
 109         if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
 110                 echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
 111                 echo "warning: This will work, but may not be a sufficiently large repo" >&2
 112                 echo "warning: for representative measurements." >&2
 113         fi
 114         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
 115 }
 116 test_checkout_worktree () {
 117         git checkout-index -u -a ||
 118         error "git checkout-index failed"
 119 }
 120
 121 # Performance tests should never fail.  If they do, stop immediately
 122 immediate=t
 123
 124 test_run_perf_ () {
 125         test_cleanup=:
 126         test_export_="test_cleanup"
 127         export test_cleanup test_export_
 128         /usr/bin/time -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 129 . '"$TEST_DIRECTORY"/test-lib-functions.sh'
 130 test_export () {
 131         [ $# != 0 ] || return 0
 132         test_export_="$test_export_\\|$1"
 133         shift
 134         test_export "$@"
 135 }
 136 '"$1"'
 137 ret=$?
 138 set | sed -n "s'"/'/'\\\\''/g"';s/^\\($test_export_\\)/export '"'&'"'/p" >test_vars
 139 exit $ret' >&3 2>&4
 140         eval_ret=$?
 141
 142         if test $eval_ret = 0 || test -n "$expecting_failure"
 143         then
 144                 test_eval_ "$test_cleanup"
 145                 . ./test_vars || error "failed to load updated environment"
 146         fi
 147         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 148                 echo ""
 149         fi
 150         return "$eval_ret"
 151 }
 152
 153
 154 test_perf () {
 155         test_start_
 156         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 157         test "$#" = 2 ||
 158         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 159         export test_prereq
 160         if ! test_skip "$@"
 161         then
 162                 base=$(basename "$0" .sh)
 163                 echo "$test_count" >>"$perf_results_dir"/$base.subtests
 164                 echo "$1" >"$perf_results_dir"/$base.$test_count.descr
 165                 if test -z "$verbose"; then
 166                         printf "%s" "perf $test_count - $1:"
 167                 else
 168                         echo "perf $test_count - $1:"
 169                 fi
 170                 for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
 171                         say >&3 "running: $2"
 172                         if test_run_perf_ "$2"
 173                         then
 174                                 if test -z "$verbose"; then
 175                                         printf " %s" "$i"
 176                                 else
 177                                         echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
 178                                 fi
 179                         else
 180                                 test -z "$verbose" && echo
 181                                 test_failure_ "$@"
 182                                 break
 183                         fi
 184                 done
 185                 if test -z "$verbose"; then
 186                         echo " ok"
 187                 else
 188                         test_ok_ "$1"
 189                 fi
 190                 base="$perf_results_dir"/"$perf_results_prefix$(basename "$0" .sh)"."$test_count"
 191                 "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".times
 192         fi
 193         test_finish_
 194 }
 195
 196 # We extend test_done to print timings at the end (./run disables this
 197 # and does it after running everything)
 198 test_at_end_hook_ () {
 199         if test -z "$GIT_PERF_AGGREGATING_LATER"; then
 200                 ( cd "$TEST_DIRECTORY"/perf && ./aggregate.perl $(basename "$0") )
 201         fi
 202 }
 203
 204 test_export () {
 205         export "$@"
 206 }