Andrew's git - gitweb.git/blob - 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
  22case "$GIT_TEST_TEE_STARTED, $* " in
  23done,*)
  24        # do not redirect again
  25        ;;
  26*' --tee '*|*' --va'*)
  27        mkdir -p test-results
  28        BASE=test-results/$(basename "$0" .sh)
  29        (GIT_TEST_TEE_STARTED=done ${SHELL-sh} "$0" "$@" 2>&1;
  30         echo $? > $BASE.exit) | tee $BASE.out
  31        test "$(cat $BASE.exit)" = 0
  32        exit
  33        ;;
  34esac
  35
  36TEST_DIRECTORY=$(pwd)/..
  37TEST_OUTPUT_DIRECTORY=$(pwd)
  38if test -z "$GIT_TEST_INSTALLED"; then
  39        perf_results_prefix=
  40else
  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)
  44fi
  45
  46TEST_NO_CREATE_REPO=t
  47TEST_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
  53export TEST_DIRECTORY TRASH_DIRECTORY GIT_BUILD_DIR GIT_TEST_CMP
  54
  55MODERN_GIT=$GIT_BUILD_DIR/bin-wrappers/git
  56export MODERN_GIT
  57
  58perf_results_dir=$TEST_OUTPUT_DIRECTORY/test-results
  59test -n "$GIT_PERF_SUBSECTION" && perf_results_dir="$perf_results_dir/$GIT_PERF_SUBSECTION"
  60mkdir -p "$perf_results_dir"
  61rm -f "$perf_results_dir"/$(basename "$0" .sh).subtests
  62
  63die_if_build_dir_not_repo () {
  64        if ! ( cd "$TEST_DIRECTORY/.." &&
  65                    git rev-parse --build-dir >/dev/null 2>&1 ); then
  66                error "No $1 defined, and your build directory is not a repo"
  67        fi
  68}
  69
  70if test -z "$GIT_PERF_REPO"; then
  71        die_if_build_dir_not_repo '$GIT_PERF_REPO'
  72        GIT_PERF_REPO=$TEST_DIRECTORY/..
  73fi
  74if test -z "$GIT_PERF_LARGE_REPO"; then
  75        die_if_build_dir_not_repo '$GIT_PERF_LARGE_REPO'
  76        GIT_PERF_LARGE_REPO=$TEST_DIRECTORY/..
  77fi
  78
  79test_perf_do_repo_symlink_config_ () {
  80        test_have_prereq SYMLINKS || git config core.symlinks false
  81}
  82
  83test_perf_create_repo_from () {
  84        test "$#" = 2 ||
  85        error "bug in the test script: not 2 parameters to test-create-repo"
  86        repo="$1"
  87        source="$2"
  88        source_git="$("$MODERN_GIT" -C "$source" rev-parse --git-dir)"
  89        objects_dir="$("$MODERN_GIT" -C "$source" rev-parse --git-path objects)"
  90        mkdir -p "$repo/.git"
  91        (
  92                cd "$source" &&
  93                { cp -Rl "$objects_dir" "$repo/.git/" 2>/dev/null ||
  94                        cp -R "$objects_dir" "$repo/.git/"; } &&
  95                for stuff in "$source_git"/*; do
  96                        case "$stuff" in
  97                                */objects|*/hooks|*/config|*/commondir)
  98                                        ;;
  99                                *)
 100                                        cp -R "$stuff" "$repo/.git/" || exit 1
 101                                        ;;
 102                        esac
 103                done
 104        ) &&
 105        (
 106                cd "$repo" &&
 107                "$MODERN_GIT" init -q &&
 108                test_perf_do_repo_symlink_config_ &&
 109                mv .git/hooks .git/hooks-disabled 2>/dev/null &&
 110                if test -f .git/index.lock
 111                then
 112                        # We may be copying a repo that can't run "git
 113                        # status" due to a locked index. Since we have
 114                        # a copy it's fine to remove the lock.
 115                        rm .git/index.lock
 116                fi
 117        ) || error "failed to copy repository '$source' to '$repo'"
 118}
 119
 120# call at least one of these to establish an appropriately-sized repository
 121test_perf_fresh_repo () {
 122        repo="${1:-$TRASH_DIRECTORY}"
 123        "$MODERN_GIT" init -q "$repo" &&
 124        (
 125                cd "$repo" &&
 126                test_perf_do_repo_symlink_config_
 127        )
 128}
 129
 130test_perf_default_repo () {
 131        test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
 132}
 133test_perf_large_repo () {
 134        if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
 135                echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
 136                echo "warning: This will work, but may not be a sufficiently large repo" >&2
 137                echo "warning: for representative measurements." >&2
 138        fi
 139        test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
 140}
 141test_checkout_worktree () {
 142        git checkout-index -u -a ||
 143        error "git checkout-index failed"
 144}
 145
 146# Performance tests should never fail.  If they do, stop immediately
 147immediate=t
 148
 149# Perf tests require GNU time
 150case "$(uname -s)" in Darwin) GTIME="${GTIME:-gtime}";; esac
 151GTIME="${GTIME:-/usr/bin/time}"
 152
 153test_run_perf_ () {
 154        test_cleanup=:
 155        test_export_="test_cleanup"
 156        export test_cleanup test_export_
 157        "$GTIME" -f "%E %U %S" -o test_time.$i "$SHELL" -c '
 158. '"$TEST_DIRECTORY"/test-lib-functions.sh'
 159test_export () {
 160        [ $# != 0 ] || return 0
 161        test_export_="$test_export_\\|$1"
 162        shift
 163        test_export "$@"
 164}
 165'"$1"'
 166ret=$?
 167set | sed -n "s'"/'/'\\\\''/g"';s/^\\($test_export_\\)/export '"'&'"'/p" >test_vars
 168exit $ret' >&3 2>&4
 169        eval_ret=$?
 170
 171        if test $eval_ret = 0 || test -n "$expecting_failure"
 172        then
 173                test_eval_ "$test_cleanup"
 174                . ./test_vars || error "failed to load updated environment"
 175        fi
 176        if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 177                echo ""
 178        fi
 179        return "$eval_ret"
 180}
 181
 182
 183test_perf () {
 184        test_start_
 185        test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 186        test "$#" = 2 ||
 187        error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 188        export test_prereq
 189        if ! test_skip "$@"
 190        then
 191                base=$(basename "$0" .sh)
 192                echo "$test_count" >>"$perf_results_dir"/$base.subtests
 193                echo "$1" >"$perf_results_dir"/$base.$test_count.descr
 194                if test -z "$verbose"; then
 195                        printf "%s" "perf $test_count - $1:"
 196                else
 197                        echo "perf $test_count - $1:"
 198                fi
 199                for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
 200                        say >&3 "running: $2"
 201                        if test_run_perf_ "$2"
 202                        then
 203                                if test -z "$verbose"; then
 204                                        printf " %s" "$i"
 205                                else
 206                                        echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
 207                                fi
 208                        else
 209                                test -z "$verbose" && echo
 210                                test_failure_ "$@"
 211                                break
 212                        fi
 213                done
 214                if test -z "$verbose"; then
 215                        echo " ok"
 216                else
 217                        test_ok_ "$1"
 218                fi
 219                base="$perf_results_dir"/"$perf_results_prefix$(basename "$0" .sh)"."$test_count"
 220                "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".times
 221        fi
 222        test_finish_
 223}
 224
 225# We extend test_done to print timings at the end (./run disables this
 226# and does it after running everything)
 227test_at_end_hook_ () {
 228        if test -z "$GIT_PERF_AGGREGATING_LATER"; then
 229                ( cd "$TEST_DIRECTORY"/perf && ./aggregate.perl $(basename "$0") )
 230        fi
 231}
 232
 233test_export () {
 234        export "$@"
 235}