mirror of
https://github.com/ilyakooo0/urbit.git
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137 lines
4.0 KiB
C
137 lines
4.0 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "task.h"
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#include "uv.h"
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#include <stdio.h>
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#include <stdlib.h>
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#define NUM_SYNC_REQS (10 * 1e5)
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#define NUM_ASYNC_REQS (1 * (int) 1e5)
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#define MAX_CONCURRENT_REQS 32
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#define sync_stat(req, path) \
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do { \
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uv_fs_stat(uv_default_loop(), (req), (path), NULL); \
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uv_fs_req_cleanup((req)); \
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} \
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while (0)
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struct async_req {
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const char* path;
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uv_fs_t fs_req;
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int* count;
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};
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static void warmup(const char* path) {
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uv_fs_t reqs[MAX_CONCURRENT_REQS];
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unsigned int i;
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/* warm up the thread pool */
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for (i = 0; i < ARRAY_SIZE(reqs); i++)
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uv_fs_stat(uv_default_loop(), reqs + i, path, uv_fs_req_cleanup);
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uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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/* warm up the OS dirent cache */
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for (i = 0; i < 16; i++)
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sync_stat(reqs + 0, path);
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}
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static void sync_bench(const char* path) {
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uint64_t before;
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uint64_t after;
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uv_fs_t req;
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int i;
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/* do the sync benchmark */
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before = uv_hrtime();
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for (i = 0; i < NUM_SYNC_REQS; i++)
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sync_stat(&req, path);
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after = uv_hrtime();
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printf("%s stats (sync): %.2fs (%s/s)\n",
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fmt(1.0 * NUM_SYNC_REQS),
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(after - before) / 1e9,
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fmt((1.0 * NUM_SYNC_REQS) / ((after - before) / 1e9)));
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fflush(stdout);
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}
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static void stat_cb(uv_fs_t* fs_req) {
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struct async_req* req = container_of(fs_req, struct async_req, fs_req);
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uv_fs_req_cleanup(&req->fs_req);
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if (*req->count == 0) return;
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uv_fs_stat(uv_default_loop(), &req->fs_req, req->path, stat_cb);
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(*req->count)--;
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}
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static void async_bench(const char* path) {
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struct async_req reqs[MAX_CONCURRENT_REQS];
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struct async_req* req;
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uint64_t before;
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uint64_t after;
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int count;
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int i;
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for (i = 1; i <= MAX_CONCURRENT_REQS; i++) {
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count = NUM_ASYNC_REQS;
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for (req = reqs; req < reqs + i; req++) {
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req->path = path;
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req->count = &count;
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uv_fs_stat(uv_default_loop(), &req->fs_req, req->path, stat_cb);
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}
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before = uv_hrtime();
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uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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after = uv_hrtime();
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printf("%s stats (%d concurrent): %.2fs (%s/s)\n",
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fmt(1.0 * NUM_ASYNC_REQS),
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i,
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(after - before) / 1e9,
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fmt((1.0 * NUM_ASYNC_REQS) / ((after - before) / 1e9)));
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fflush(stdout);
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}
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}
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/* This benchmark aims to measure the overhead of doing I/O syscalls from
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* the thread pool. The stat() syscall was chosen because its results are
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* easy for the operating system to cache, taking the actual I/O overhead
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* out of the equation.
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*/
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BENCHMARK_IMPL(fs_stat) {
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const char path[] = ".";
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warmup(path);
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sync_bench(path);
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async_bench(path);
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MAKE_VALGRIND_HAPPY();
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return 0;
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}
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