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   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="$2"
  83         source_git="$(git -C "$source" rev-parse --git-dir)"
  84         objects_dir="$(git -C "$source" rev-parse --git-path objects)"
  85         mkdir -p "$repo/.git"
  86         (
  87                 { cp -Rl "$objects_dir" "$repo/.git/" 2>/dev/null ||
  88                         cp -R "$objects_dir" "$repo/.git/"; } &&
  89                 for stuff in "$source_git"/*; do
  90                         case "$stuff" in
  91                                 */objects|*/hooks|*/config|*/commondir)
  92                                         ;;
  93                                 *)
  94                                         cp -R "$stuff" "$repo/.git/" || exit 1
  95                                         ;;
  96                         esac
  97                 done &&
  98                 cd "$repo" &&
  99                 git init -q && {
 100                         test_have_prereq SYMLINKS ||
 101                         git config core.symlinks false
 102                 } &&
 103                 mv .git/hooks .git/hooks-disabled 2>/dev/null
 104         ) || error "failed to copy repository '$source' to '$repo'"
 105 }
 106
 107 # call at least one of these to establish an appropriately-sized repository
 108 test_perf_default_repo () {
 109         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
 110 }
 111 test_perf_large_repo () {
 112         if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
 113                 echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
 114                 echo "warning: This will work, but may not be a sufficiently large repo" >&2
 115                 echo "warning: for representative measurements." >&2
 116         fi
 117         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
 118 }
 119 test_checkout_worktree () {
 120         git checkout-index -u -a ||
 121         error "git checkout-index failed"
 122 }
 123
 124 # Performance tests should never fail.  If they do, stop immediately
 125 immediate=t
 126
 127 test_run_perf_ () {
 128         test_cleanup=:
 129         test_export_="test_cleanup"
 130         export test_cleanup test_export_
 131         /usr/bin/time -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 132 . '"$TEST_DIRECTORY"/test-lib-functions.sh'
 133 test_export () {
 134         [ $# != 0 ] || return 0
 135         test_export_="$test_export_\\|$1"
 136         shift
 137         test_export "$@"
 138 }
 139 '"$1"'
 140 ret=$?
 141 set | sed -n "s'"/'/'\\\\''/g"';s/^\\($test_export_\\)/export '"'&'"'/p" >test_vars
 142 exit $ret' >&3 2>&4
 143         eval_ret=$?
 144
 145         if test $eval_ret = 0 || test -n "$expecting_failure"
 146         then
 147                 test_eval_ "$test_cleanup"
 148                 . ./test_vars || error "failed to load updated environment"
 149         fi
 150         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 151                 echo ""
 152         fi
 153         return "$eval_ret"
 154 }
 155
 156
 157 test_perf () {
 158         test_start_
 159         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 160         test "$#" = 2 ||
 161         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 162         export test_prereq
 163         if ! test_skip "$@"
 164         then
 165                 base=$(basename "$0" .sh)
 166                 echo "$test_count" >>"$perf_results_dir"/$base.subtests
 167                 echo "$1" >"$perf_results_dir"/$base.$test_count.descr
 168                 if test -z "$verbose"; then
 169                         printf "%s" "perf $test_count - $1:"
 170                 else
 171                         echo "perf $test_count - $1:"
 172                 fi
 173                 for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
 174                         say >&3 "running: $2"
 175                         if test_run_perf_ "$2"
 176                         then
 177                                 if test -z "$verbose"; then
 178                                         printf " %s" "$i"
 179                                 else
 180                                         echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
 181                                 fi
 182                         else
 183                                 test -z "$verbose" && echo
 184                                 test_failure_ "$@"
 185                                 break
 186                         fi
 187                 done
 188                 if test -z "$verbose"; then
 189                         echo " ok"
 190                 else
 191                         test_ok_ "$1"
 192                 fi
 193                 base="$perf_results_dir"/"$perf_results_prefix$(basename "$0" .sh)"."$test_count"
 194                 "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".times
 195         fi
 196         test_finish_
 197 }
 198
 199 # We extend test_done to print timings at the end (./run disables this
 200 # and does it after running everything)
 201 test_at_end_hook_ () {
 202         if test -z "$GIT_PERF_AGGREGATING_LATER"; then
 203                 ( cd "$TEST_DIRECTORY"/perf && ./aggregate.perl $(basename "$0") )
 204         fi
 205 }
 206
 207 test_export () {
 208         export "$@"
 209 }