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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                 cd "$source" &&
  88                 { cp -Rl "$objects_dir" "$repo/.git/" 2>/dev/null ||
  89                         cp -R "$objects_dir" "$repo/.git/"; } &&
  90                 for stuff in "$source_git"/*; do
  91                         case "$stuff" in
  92                                 */objects|*/hooks|*/config|*/commondir)
  93                                         ;;
  94                                 *)
  95                                         cp -R "$stuff" "$repo/.git/" || exit 1
  96                                         ;;
  97                         esac
  98                 done
  99         ) &&
 100         (
 101                 cd "$repo" &&
 102                 git init -q && {
 103                         test_have_prereq SYMLINKS ||
 104                         git config core.symlinks false
 105                 } &&
 106                 mv .git/hooks .git/hooks-disabled 2>/dev/null
 107         ) || error "failed to copy repository '$source' to '$repo'"
 108 }
 109
 110 # call at least one of these to establish an appropriately-sized repository
 111 test_perf_default_repo () {
 112         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
 113 }
 114 test_perf_large_repo () {
 115         if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
 116                 echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
 117                 echo "warning: This will work, but may not be a sufficiently large repo" >&2
 118                 echo "warning: for representative measurements." >&2
 119         fi
 120         test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
 121 }
 122 test_checkout_worktree () {
 123         git checkout-index -u -a ||
 124         error "git checkout-index failed"
 125 }
 126
 127 # Performance tests should never fail.  If they do, stop immediately
 128 immediate=t
 129
 130 # Perf tests require GNU time
 131 case "$(uname -s)" in Darwin) GTIME="${GTIME:-gtime}";; esac
 132 GTIME="${GTIME:-/usr/bin/time}"
 133
 134 test_run_perf_ () {
 135         test_cleanup=:
 136         test_export_="test_cleanup"
 137         export test_cleanup test_export_
 138         "$GTIME" -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 139 . '"$TEST_DIRECTORY"/test-lib-functions.sh'
 140 test_export () {
 141         [ $# != 0 ] || return 0
 142         test_export_="$test_export_\\|$1"
 143         shift
 144         test_export "$@"
 145 }
 146 '"$1"'
 147 ret=$?
 148 set | sed -n "s'"/'/'\\\\''/g"';s/^\\($test_export_\\)/export '"'&'"'/p" >test_vars
 149 exit $ret' >&3 2>&4
 150         eval_ret=$?
 151
 152         if test $eval_ret = 0 || test -n "$expecting_failure"
 153         then
 154                 test_eval_ "$test_cleanup"
 155                 . ./test_vars || error "failed to load updated environment"
 156         fi
 157         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 158                 echo ""
 159         fi
 160         return "$eval_ret"
 161 }
 162
 163
 164 test_perf () {
 165         test_start_
 166         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 167         test "$#" = 2 ||
 168         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 169         export test_prereq
 170         if ! test_skip "$@"
 171         then
 172                 base=$(basename "$0" .sh)
 173                 echo "$test_count" >>"$perf_results_dir"/$base.subtests
 174                 echo "$1" >"$perf_results_dir"/$base.$test_count.descr
 175                 if test -z "$verbose"; then
 176                         printf "%s" "perf $test_count - $1:"
 177                 else
 178                         echo "perf $test_count - $1:"
 179                 fi
 180                 for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
 181                         say >&3 "running: $2"
 182                         if test_run_perf_ "$2"
 183                         then
 184                                 if test -z "$verbose"; then
 185                                         printf " %s" "$i"
 186                                 else
 187                                         echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
 188                                 fi
 189                         else
 190                                 test -z "$verbose" && echo
 191                                 test_failure_ "$@"
 192                                 break
 193                         fi
 194                 done
 195                 if test -z "$verbose"; then
 196                         echo " ok"
 197                 else
 198                         test_ok_ "$1"
 199                 fi
 200                 base="$perf_results_dir"/"$perf_results_prefix$(basename "$0" .sh)"."$test_count"
 201                 "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".times
 202         fi
 203         test_finish_
 204 }
 205
 206 # We extend test_done to print timings at the end (./run disables this
 207 # and does it after running everything)
 208 test_at_end_hook_ () {
 209         if test -z "$GIT_PERF_AGGREGATING_LATER"; then
 210                 ( cd "$TEST_DIRECTORY"/perf && ./aggregate.perl $(basename "$0") )
 211         fi
 212 }
 213
 214 test_export () {
 215         export "$@"
 216 }