summaryrefslogtreecommitdiff
path: root/t/perf/perf-lib.sh
blob: 13e389367a4e091c59d52b1e2567f3ca6cb121fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
# Performance testing framework.  Each perf script starts much like
# a normal test script, except it sources this library instead of
# test-lib.sh.  See t/perf/README for documentation.
#
# Copyright (c) 2011 Thomas Rast
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see http://www.gnu.org/licenses/ .

# These variables must be set before the inclusion of test-lib.sh below,
# because it will change our working directory.
TEST_DIRECTORY=$(pwd)/..
TEST_OUTPUT_DIRECTORY=$(pwd)

TEST_NO_CREATE_REPO=t
TEST_NO_MALLOC_CHECK=t

. ../test-lib.sh

if test -n "$GIT_TEST_INSTALLED" -a -z "$PERF_SET_GIT_TEST_INSTALLED"
then
	error "Do not use GIT_TEST_INSTALLED with the perf tests.

Instead use:

    ./run <path-to-git> -- <tests>

See t/perf/README for details."
fi

# Variables from test-lib that are normally internal to the tests; we
# need to export them for test_perf subshells
export TEST_DIRECTORY TRASH_DIRECTORY GIT_BUILD_DIR GIT_TEST_CMP

MODERN_GIT=$GIT_BUILD_DIR/bin-wrappers/git
export MODERN_GIT

perf_results_dir=$TEST_OUTPUT_DIRECTORY/test-results
test -n "$GIT_PERF_SUBSECTION" && perf_results_dir="$perf_results_dir/$GIT_PERF_SUBSECTION"
mkdir -p "$perf_results_dir"
rm -f "$perf_results_dir"/$(basename "$0" .sh).subtests

die_if_build_dir_not_repo () {
	if ! ( cd "$TEST_DIRECTORY/.." &&
		    git rev-parse --build-dir >/dev/null 2>&1 ); then
		error "No $1 defined, and your build directory is not a repo"
	fi
}

if test -z "$GIT_PERF_REPO"; then
	die_if_build_dir_not_repo '$GIT_PERF_REPO'
	GIT_PERF_REPO=$TEST_DIRECTORY/..
fi
if test -z "$GIT_PERF_LARGE_REPO"; then
	die_if_build_dir_not_repo '$GIT_PERF_LARGE_REPO'
	GIT_PERF_LARGE_REPO=$TEST_DIRECTORY/..
fi

test_perf_do_repo_symlink_config_ () {
	test_have_prereq SYMLINKS || git config core.symlinks false
}

test_perf_create_repo_from () {
	test "$#" = 2 ||
	BUG "not 2 parameters to test-create-repo"
	repo="$1"
	source="$2"
	source_git="$("$MODERN_GIT" -C "$source" rev-parse --git-dir)"
	objects_dir="$("$MODERN_GIT" -C "$source" rev-parse --git-path objects)"
	mkdir -p "$repo/.git"
	(
		cd "$source" &&
		{ cp -Rl "$objects_dir" "$repo/.git/" 2>/dev/null ||
			cp -R "$objects_dir" "$repo/.git/"; } &&
		for stuff in "$source_git"/*; do
			case "$stuff" in
				*/objects|*/hooks|*/config|*/commondir)
					;;
				*)
					cp -R "$stuff" "$repo/.git/" || exit 1
					;;
			esac
		done
	) &&
	(
		cd "$repo" &&
		"$MODERN_GIT" init -q &&
		test_perf_do_repo_symlink_config_ &&
		mv .git/hooks .git/hooks-disabled 2>/dev/null &&
		if test -f .git/index.lock
		then
			# We may be copying a repo that can't run "git
			# status" due to a locked index. Since we have
			# a copy it's fine to remove the lock.
			rm .git/index.lock
		fi
	) || error "failed to copy repository '$source' to '$repo'"
}

# call at least one of these to establish an appropriately-sized repository
test_perf_fresh_repo () {
	repo="${1:-$TRASH_DIRECTORY}"
	"$MODERN_GIT" init -q "$repo" &&
	(
		cd "$repo" &&
		test_perf_do_repo_symlink_config_
	)
}

test_perf_default_repo () {
	test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
}
test_perf_large_repo () {
	if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
		echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
		echo "warning: This will work, but may not be a sufficiently large repo" >&2
		echo "warning: for representative measurements." >&2
	fi
	test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
}
test_checkout_worktree () {
	git checkout-index -u -a ||
	error "git checkout-index failed"
}

# Performance tests should never fail.  If they do, stop immediately
immediate=t

# Perf tests require GNU time
case "$(uname -s)" in Darwin) GTIME="${GTIME:-gtime}";; esac
GTIME="${GTIME:-/usr/bin/time}"

test_run_perf_ () {
	test_cleanup=:
	test_export_="test_cleanup"
	export test_cleanup test_export_
	"$GTIME" -f "%E %U %S" -o test_time.$i "$SHELL" -c '
. '"$TEST_DIRECTORY"/test-lib-functions.sh'
test_export () {
	[ $# != 0 ] || return 0
	test_export_="$test_export_\\|$1"
	shift
	test_export "$@"
}
'"$1"'
ret=$?
set | sed -n "s'"/'/'\\\\''/g"';s/^\\($test_export_\\)/export '"'&'"'/p" >test_vars
exit $ret' >&3 2>&4
	eval_ret=$?

	if test $eval_ret = 0 || test -n "$expecting_failure"
	then
		test_eval_ "$test_cleanup"
		. ./test_vars || error "failed to load updated environment"
	fi
	if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
		echo ""
	fi
	return "$eval_ret"
}

test_wrapper_ () {
	test_wrapper_func_=$1; shift
	test_start_
	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
	test "$#" = 2 ||
	BUG "not 2 or 3 parameters to test-expect-success"
	export test_prereq
	if ! test_skip "$@"
	then
		base=$(basename "$0" .sh)
		echo "$test_count" >>"$perf_results_dir"/$base.subtests
		echo "$1" >"$perf_results_dir"/$base.$test_count.descr
		base="$perf_results_dir"/"$PERF_RESULTS_PREFIX$(basename "$0" .sh)"."$test_count"
		"$test_wrapper_func_" "$@"
	fi

	test_finish_
}

test_perf_ () {
	if test -z "$verbose"; then
		printf "%s" "perf $test_count - $1:"
	else
		echo "perf $test_count - $1:"
	fi
	for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
		say >&3 "running: $2"
		if test_run_perf_ "$2"
		then
			if test -z "$verbose"; then
				printf " %s" "$i"
			else
				echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
			fi
		else
			test -z "$verbose" && echo
			test_failure_ "$@"
			break
		fi
	done
	if test -z "$verbose"; then
		echo " ok"
	else
		test_ok_ "$1"
	fi
	"$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".result
}

test_perf () {
	test_wrapper_ test_perf_ "$@"
}

test_size_ () {
	say >&3 "running: $2"
	if test_eval_ "$2" 3>"$base".result; then
		test_ok_ "$1"
	else
		test_failure_ "$@"
	fi
}

test_size () {
	test_wrapper_ test_size_ "$@"
}

# We extend test_done to print timings at the end (./run disables this
# and does it after running everything)
test_at_end_hook_ () {
	if test -z "$GIT_PERF_AGGREGATING_LATER"; then
		( cd "$TEST_DIRECTORY"/perf && ./aggregate.perl $(basename "$0") )
	fi
}

test_export () {
	export "$@"
}