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Diffstat (limited to '3rdparty/libuv/test/benchmark-spawn.c')
-rw-r--r-- | 3rdparty/libuv/test/benchmark-spawn.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/3rdparty/libuv/test/benchmark-spawn.c b/3rdparty/libuv/test/benchmark-spawn.c new file mode 100644 index 00000000000..ed9ad608f37 --- /dev/null +++ b/3rdparty/libuv/test/benchmark-spawn.c @@ -0,0 +1,164 @@ +/* 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; +} |