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/* 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 = { 0 };
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 maybe_spawn() {
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, int exit_status, int term_signal) {
ASSERT(exit_status == 42);
ASSERT(term_signal == 0);
uv_close((uv_handle_t*)process, process_close_cb);
}
uv_buf_t 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;
return buf;
}
void pipe_close_cb(uv_handle_t* pipe) {
ASSERT(pipe_open == 1);
pipe_open = 0;
maybe_spawn();
}
void on_read(uv_stream_t* pipe, ssize_t nread, uv_buf_t buf) {
uv_err_t err = uv_last_error(loop);
if (nread > 0) {
ASSERT(pipe_open == 1);
output_used += nread;
} else if (nread < 0) {
if (err.code == UV_EOF) {
uv_close((uv_handle_t*)pipe, pipe_close_cb);
}
}
}
static void spawn() {
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);
options.stdout_stream = &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);
ASSERT(r == 0);
uv_update_time(loop);
end_time = uv_now(loop);
LOGF("spawn: %.0f spawns/s\n",
(double) N / (double) (end_time - start_time) * 1000.0);
return 0;
}
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