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
|
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* This benchmark spawns itself 1000 times. */
#include "task.h"
#include "uv.h"
static uv_loop_t* loop;
static int N = 1000;
static int done;
static uv_process_t process;
static uv_process_options_t options;
static char exepath[1024];
static size_t exepath_size = 1024;
static char* args[3];
static uv_pipe_t out;
#define OUTPUT_SIZE 1024
static char output[OUTPUT_SIZE];
static int output_used;
static int process_open;
static int pipe_open;
static void spawn(void);
static void maybe_spawn(void) {
if (process_open == 0 && pipe_open == 0) {
done++;
if (done < N) {
spawn();
}
}
}
static void process_close_cb(uv_handle_t* handle) {
ASSERT(process_open == 1);
process_open = 0;
maybe_spawn();
}
static void exit_cb(uv_process_t* process,
int64_t exit_status,
int term_signal) {
ASSERT(exit_status == 42);
ASSERT(term_signal == 0);
uv_close((uv_handle_t*)process, process_close_cb);
}
static void on_alloc(uv_handle_t* handle,
size_t suggested_size,
uv_buf_t* buf) {
buf->base = output + output_used;
buf->len = OUTPUT_SIZE - output_used;
}
static void pipe_close_cb(uv_handle_t* pipe) {
ASSERT(pipe_open == 1);
pipe_open = 0;
maybe_spawn();
}
static void on_read(uv_stream_t* pipe, ssize_t nread, const uv_buf_t* buf) {
if (nread > 0) {
ASSERT(pipe_open == 1);
output_used += nread;
} else if (nread < 0) {
if (nread == UV_EOF) {
uv_close((uv_handle_t*)pipe, pipe_close_cb);
}
}
}
static void spawn(void) {
uv_stdio_container_t stdio[2];
int r;
ASSERT(process_open == 0);
ASSERT(pipe_open == 0);
args[0] = exepath;
args[1] = "spawn_helper";
args[2] = NULL;
options.file = exepath;
options.args = args;
options.exit_cb = exit_cb;
uv_pipe_init(loop, &out, 0);
options.stdio = stdio;
options.stdio_count = 2;
options.stdio[0].flags = UV_IGNORE;
options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
options.stdio[1].data.stream = (uv_stream_t*)&out;
r = uv_spawn(loop, &process, &options);
ASSERT(r == 0);
process_open = 1;
pipe_open = 1;
output_used = 0;
r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
ASSERT(r == 0);
}
BENCHMARK_IMPL(spawn) {
int r;
static int64_t start_time, end_time;
loop = uv_default_loop();
r = uv_exepath(exepath, &exepath_size);
ASSERT(r == 0);
exepath[exepath_size] = '\0';
uv_update_time(loop);
start_time = uv_now(loop);
spawn();
r = uv_run(loop, UV_RUN_DEFAULT);
ASSERT(r == 0);
uv_update_time(loop);
end_time = uv_now(loop);
fprintf(stderr, "spawn: %.0f spawns/s\n",
(double) N / (double) (end_time - start_time) * 1000.0);
fflush(stderr);
MAKE_VALGRIND_HAPPY();
return 0;
}
|
