bench: add batched TCP writes benchmark

Times how long it takes to queue and write out 1,000,000 short strings.

Makefile

@@ -77,8 +77,8 @@ else
 include config-unix.mk
 endif
 
-TESTS=test/echo-server.c test/test-*.c
+TESTS=test/blackhole-server.c test/echo-server.c test/test-*.c
-BENCHMARKS=test/echo-server.c test/dns-server.c test/benchmark-*.c
+BENCHMARKS=test/blackhole-server.c test/echo-server.c test/dns-server.c test/benchmark-*.c
 
 all: uv.a test/run-tests$(E) test/run-benchmarks$(E)
 

test/benchmark-list.h

@@ -21,6 +21,7 @@
 
 BENCHMARK_DECLARE (sizes)
 BENCHMARK_DECLARE (ping_pongs)
+BENCHMARK_DECLARE (tcp_write_batch)
 BENCHMARK_DECLARE (tcp4_pound_100)
 BENCHMARK_DECLARE (tcp4_pound_1000)
 BENCHMARK_DECLARE (pipe_pound_100)
@@ -42,6 +43,7 @@ BENCHMARK_DECLARE (udp_packet_storm_1000v1000)
 BENCHMARK_DECLARE (gethostbyname)
 BENCHMARK_DECLARE (getaddrinfo)
 BENCHMARK_DECLARE (spawn)
+HELPER_DECLARE    (tcp4_blackhole_server)
 HELPER_DECLARE    (tcp_pump_server)
 HELPER_DECLARE    (pipe_pump_server)
 HELPER_DECLARE    (tcp4_echo_server)
@@ -54,6 +56,9 @@ TASK_LIST_START
   BENCHMARK_ENTRY  (ping_pongs)
   BENCHMARK_HELPER (ping_pongs, tcp4_echo_server)
 
+  BENCHMARK_ENTRY  (tcp_write_batch)
+  BENCHMARK_HELPER (tcp_write_batch, tcp4_blackhole_server)
+
   BENCHMARK_ENTRY  (tcp_pump100_client)
   BENCHMARK_HELPER (tcp_pump100_client, tcp_pump_server)
 

test/benchmark-tcp-write-batch.c

@@ -0,0 +1,144 @@
+/* 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.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#define WRITE_REQ_DATA  "Hello, world."
+#define NUM_WRITE_REQS  (1000 * 1000)
+
+#define container_of(ptr, type, member) \
+  ((type *) ((char *) (ptr) - offsetof(type, member)))
+
+typedef struct {
+  uv_write_t req;
+  uv_buf_t buf;
+} write_req;
+
+
+static write_req* write_reqs;
+static uv_tcp_t tcp_client;
+static uv_connect_t connect_req;
+static uv_shutdown_t shutdown_req;
+
+static int shutdown_cb_called = 0;
+static int connect_cb_called = 0;
+static int write_cb_called = 0;
+static int close_cb_called = 0;
+
+static void connect_cb(uv_connect_t* req, int status);
+static void write_cb(uv_write_t* req, int status);
+static void shutdown_cb(uv_shutdown_t* req, int status);
+static void close_cb(uv_handle_t* handle);
+
+
+static void connect_cb(uv_connect_t* req, int status) {
+  write_req* w;
+  int i;
+  int r;
+
+  ASSERT(req->handle == (uv_stream_t*)&tcp_client);
+
+  for (i = 0; i < NUM_WRITE_REQS; i++) {
+    w = &write_reqs[i];
+    r = uv_write(&w->req, req->handle, &w->buf, 1, write_cb);
+    ASSERT(r == 0);
+  }
+
+  r = uv_shutdown(&shutdown_req, req->handle, shutdown_cb);
+  ASSERT(r == 0);
+
+  connect_cb_called++;
+}
+
+
+static void write_cb(uv_write_t* req, int status) {
+  ASSERT(req != NULL);
+  ASSERT(status == 0);
+  write_cb_called++;
+}
+
+
+static void shutdown_cb(uv_shutdown_t* req, int status) {
+  ASSERT(req->handle == (uv_stream_t*)&tcp_client);
+  ASSERT(req->handle->write_queue_size == 0);
+
+  uv_close((uv_handle_t*)req->handle, close_cb);
+  free(write_reqs);
+
+  shutdown_cb_called++;
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  ASSERT(handle == (uv_handle_t*)&tcp_client);
+  close_cb_called++;
+}
+
+
+BENCHMARK_IMPL(tcp_write_batch) {
+  struct sockaddr_in addr;
+  uv_loop_t* loop;
+  uint64_t start;
+  uint64_t stop;
+  int i;
+  int r;
+
+  write_reqs = malloc(sizeof(*write_reqs) * NUM_WRITE_REQS);
+  ASSERT(write_reqs != NULL);
+
+  /* Prepare the data to write out. */
+  for (i = 0; i < NUM_WRITE_REQS; i++) {
+    write_reqs[i].buf = uv_buf_init(WRITE_REQ_DATA,
+                                    sizeof(WRITE_REQ_DATA) - 1);
+  }
+
+  loop = uv_default_loop();
+  addr = uv_ip4_addr("127.0.0.1", TEST_PORT);
+
+  r = uv_tcp_init(loop, &tcp_client);
+  ASSERT(r == 0);
+
+  r = uv_tcp_connect(&connect_req, &tcp_client, addr, connect_cb);
+  ASSERT(r == 0);
+
+  start = uv_hrtime();
+
+  r = uv_run(loop);
+  ASSERT(r == 0);
+
+  stop = uv_hrtime();
+
+  ASSERT(connect_cb_called == 1);
+  ASSERT(write_cb_called == NUM_WRITE_REQS);
+  ASSERT(shutdown_cb_called == 1);
+  ASSERT(close_cb_called == 1);
+
+  printf("%ld write requests in %.2fs.\n",
+         (long)NUM_WRITE_REQS,
+         (stop - start) / 10e8);
+
+  return 0;
+}

test/blackhole-server.c

@@ -0,0 +1,122 @@
+/* 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.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#define container_of(ptr, type, member) \
+  ((type *) ((char *) (ptr) - offsetof(type, member)))
+
+typedef struct {
+  uv_tcp_t handle;
+  uv_shutdown_t shutdown_req;
+} conn_rec;
+
+static uv_tcp_t tcp_server;
+
+static void connection_cb(uv_stream_t* stream, int status);
+static uv_buf_t alloc_cb(uv_handle_t* handle, size_t suggested_size);
+static void read_cb(uv_stream_t* stream, ssize_t nread, uv_buf_t buf);
+static void shutdown_cb(uv_shutdown_t* req, int status);
+static void close_cb(uv_handle_t* handle);
+
+
+static void connection_cb(uv_stream_t* stream, int status) {
+  conn_rec* conn;
+  int r;
+
+  ASSERT(status == 0);
+  ASSERT(stream == (uv_stream_t*)&tcp_server);
+
+  conn = malloc(sizeof *conn);
+  ASSERT(conn != NULL);
+
+  r = uv_tcp_init(stream->loop, &conn->handle);
+  ASSERT(r == 0);
+
+  r = uv_accept(stream, (uv_stream_t*)&conn->handle);
+  ASSERT(r == 0);
+
+  r = uv_read_start((uv_stream_t*)&conn->handle, alloc_cb, read_cb);
+  ASSERT(r == 0);
+}
+
+
+static uv_buf_t alloc_cb(uv_handle_t* handle, size_t suggested_size) {
+  static char buf[65536];
+  return uv_buf_init(buf, sizeof buf);
+}
+
+
+static void read_cb(uv_stream_t* stream, ssize_t nread, uv_buf_t buf) {
+  conn_rec* conn;
+  int r;
+
+  if (nread >= 0)
+    return;
+
+  ASSERT(uv_last_error(stream->loop).code == UV_EOF);
+
+  conn = container_of(stream, conn_rec, handle);
+
+  r = uv_shutdown(&conn->shutdown_req, stream, shutdown_cb);
+  ASSERT(r == 0);
+}
+
+
+static void shutdown_cb(uv_shutdown_t* req, int status) {
+  conn_rec* conn = container_of(req, conn_rec, shutdown_req);
+  uv_close((uv_handle_t*)&conn->handle, close_cb);
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  conn_rec* conn = container_of(handle, conn_rec, handle);
+  free(conn);
+}
+
+
+HELPER_IMPL(tcp4_blackhole_server) {
+  struct sockaddr_in addr;
+  uv_loop_t* loop;
+  int r;
+
+  loop = uv_default_loop();
+  addr = uv_ip4_addr("127.0.0.1", TEST_PORT);
+
+  r = uv_tcp_init(loop, &tcp_server);
+  ASSERT(r == 0);
+
+  r = uv_tcp_bind(&tcp_server, addr);
+  ASSERT(r == 0);
+
+  r = uv_listen((uv_stream_t*)&tcp_server, 128, connection_cb);
+  ASSERT(r == 0);
+
+  r = uv_run(loop);
+  ASSERT(0 && "Blackhole server dropped out of event loop.");
+
+  return 0;
+}

uv.gyp

@@ -240,6 +240,7 @@
       'type': 'executable',
       'dependencies': [ 'uv' ],
       'sources': [
+        'test/blackhole-server.c',
         'test/echo-server.c',
         'test/run-tests.c',
         'test/runner.c',
@@ -326,9 +327,11 @@
         'test/benchmark-pump.c',
         'test/benchmark-sizes.c',
         'test/benchmark-spawn.c',
+        'test/benchmark-tcp-write-batch.c',
         'test/benchmark-udp-packet-storm.c',
         'test/dns-server.c',
         'test/echo-server.c',
+        'test/blackhole-server.c',
         'test/run-benchmarks.c',
         'test/runner.c',
         'test/runner.h',