1 /*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2020-2023. All rights reserved.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <sys/epoll.h>
17 #include <cerrno>
18 #include <cstdlib>
19 #include <cstring>
20 #include <cstdio>
21 #include <fcntl.h>
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <unistd.h>
25 #include "util.h"
26
27 using namespace std;
28 constexpr int EVENTSIZE = 10;
29 struct epoll_event g_events[EVENTSIZE], g_event;
30
31 // Used to create an epoll object to record events for files to be listened to
Bm_function_Epoll_createl(benchmark::State & state)32 static void Bm_function_Epoll_createl(benchmark::State &state)
33 {
34 for (auto _ : state) {
35 int epollFd = epoll_create1(0);
36 if (epollFd == -1) {
37 perror("epoll_createl");
38 }
39 benchmark::DoNotOptimize(epollFd);
40 close(epollFd);
41 }
42
43 state.SetBytesProcessed(state.iterations());
44 }
45
46 // Used to add, modify, or delete events to an epoll object
Bm_function_Epoll_ctl(benchmark::State & state)47 static void Bm_function_Epoll_ctl(benchmark::State &state)
48 {
49 int epollFd = epoll_create1(0);
50 if (epollFd == -1) {
51 perror("epoll_createl");
52 }
53 int fd = open("/dev/zero", O_RDONLY, OPEN_MODE);
54 if (fd == -1) {
55 perror("open epoll_ctl");
56 }
57 g_event.events = EPOLLIN | EPOLLET;
58 g_event.data.fd = fd;
59 for (auto _ : state) {
60 benchmark::DoNotOptimize(epoll_ctl(epollFd, EPOLL_CTL_ADD, fd, &g_event));
61 }
62 close(epollFd);
63 close(fd);
64 state.SetBytesProcessed(state.iterations());
65 }
66
67 // Used to wait for the file descriptor in the epoll object to appear for the event
Bm_function_Epoll_wait(benchmark::State & state)68 static void Bm_function_Epoll_wait(benchmark::State &state)
69 {
70 int epollFd = epoll_create1(0);
71 if (epollFd == -1) {
72 perror("epoll_createl");
73 }
74
75 int fd = open("/dev/zero", O_RDONLY, OPEN_MODE);
76 if (fd == -1) {
77 perror("open epoll_wait");
78 }
79
80 g_event.events = EPOLLIN | EPOLLET;
81 g_event.data.fd = fd;
82 for (auto _ : state) {
83 epoll_wait(epollFd, g_events, EVENTSIZE, 0);
84 }
85 close(epollFd);
86 close(fd);
87 state.SetBytesProcessed(state.iterations());
88 }
89
90 MUSL_BENCHMARK(Bm_function_Epoll_createl);
91 MUSL_BENCHMARK(Bm_function_Epoll_ctl);
92 MUSL_BENCHMARK(Bm_function_Epoll_wait);