iperf,测试网络性能的，不同于 webrtc里面的gcc 算法预估网络带宽，iperf是实际占用网络来传输数据测量实际的网络性能。

官网：https://iperf.fr/
官方就有 android 的下载 https://iperf.fr/iperf-download.php#android，但是看起来要访问 play.google. 墙。急用，怎么自己拿源码来ndk 编译一下。
1. 最适配的方式，应该是用 configure + make， configure来配置ndk编译器。（ubuntu环境下）没有环境，不想太折腾
2. 在AndroidStudio 上用cmake 编译
3. 还是用比较熟悉的 Android.mk ，在AS中编译

一：下载源码

二：AS 创建一个空的demo，src/main 目录下建一个jni，把源码解压到这里，然后编写 Android.mk 来编译。（如果直接使用ndk-build 命令，就不需要AS了。）

在app 的build.gradle中手动指定Android.mk 文件位置，使用的ndk版本，以及要编译的平台

Android.mk

对源码需要做一点头文件的修改

1. 在src 中加上 iperf_config.h

2. src 目录下 version.h 同上，来源为version.h.in

3.修改源码里面一个字符串，临时文件的路径

最后，build

1. 测试带宽

2. 测试udp 丢包

一：下载源码

发布的只有3.1.3 iPerf - Download iPerf3 and original iPerf pre-compiled binaries

二：AS 创建一个空的demo，src/main 目录下建一个jni，把源码解压到这里，然后编写 Android.mk 来编译。（如果直接使用ndk-build 命令，就不需要AS了。）

在app 的build.gradle中手动指定Android.mk 文件位置，使用的ndk版本，以及要编译的平台

android {
    compileSdk 32

    defaultConfig {
        applicationId "com.example.iperf3"
        minSdk 23
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

// 平台指定
        ndk{
            abiFilters "arm64-v8a"
        }
    }
// ndk 版本指定（可不选，AS会根据gradle版本指定默认）
//    ndkVersion "22.0.7026061"
    ndkVersion '24.0.8215888'
//    ndkVersion "21.1.6352462"
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

// Android.mk 文件指定
    externalNativeBuild{
        ndkBuild{
            path file("src/main/jni/Android.mk")
        }
    }
}

Android.mk

LOCAL_PATH := $(call my-dir)

#-------------------iperf3-----
include $(CLEAR_VARS)
LOCAL_MODULE := iperf3
MY_SRC_PATH = iperf-3.1.3/src
LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(MY_SRC_PATH)
#LOCAL_SRC_FILES := $(call all-c-files-under, iperf-3.1.3/src) 没效果？？
LOCAL_SRC_FILES += $(MY_SRC_PATH)/cjson.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_api.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_client_api.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_error.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_locale.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_sctp.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_server_api.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_tcp.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_udp.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/iperf_util.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/main.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/net.c
#LOCAL_SRC_FILES += $(MY_SRC_PATH)/t_timer.c
#LOCAL_SRC_FILES += $(MY_SRC_PATH)/t_units.c
#LOCAL_SRC_FILES += $(MY_SRC_PATH)/t_uuid.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/tcp_info.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/tcp_window_size.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/timer.c
LOCAL_SRC_FILES += $(MY_SRC_PATH)/units.c

LOCAL_LDFLAGS += -pie -fPIE
include $(BUILD_EXECUTABLE)
#include $(BUILD_STATIC_LIBRARY)

对源码需要做一点头文件的修改

本来这些头文件是 configure 命令自动添加上去的，我们没有configure,需要自己动手补上。

1. 在src 中加上 iperf_config.h

(来源是源码中的 iperf_config.h.in, configure命令以这个为输入，定义了一些宏, 不确定的话，直接把这个iperf3搞到ubuntu上，运行一下./configure 可以得到一版，然参考修改) 可直接参考：
iperf_config.h

/* src/iperf_config.h.in.  Generated from configure.ac by autoheader.  */

/* Define to 1 if you have the `cpuset_setaffinity' function. */
#undef HAVE_CPUSET_SETAFFINITY

/* Have CPU affinity support. */
#undef HAVE_CPU_AFFINITY

/* Define to 1 if you have the <dlfcn.h> header file. */
#undef HAVE_DLFCN_H

/* Have IPv6 flowlabel support. */
#undef HAVE_FLOWLABEL

/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H

/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H

/* Define to 1 if you have the <netinet/sctp.h> header file. */
#undef HAVE_NETINET_SCTP_H

/* Define to 1 if you have the `sched_setaffinity' function. */
#undef HAVE_SCHED_SETAFFINITY

/* Have SCTP support. */
#undef HAVE_SCTP

/* Define to 1 if you have the `sendfile' function. */
#undef HAVE_SENDFILE

/* Have SO_MAX_PACING_RATE sockopt. */
#undef HAVE_SO_MAX_PACING_RATE

/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H

/* Define to 1 if you have the <stdlib.h> header file. */
#undef HAVE_STDLIB_H

/* Define to 1 if you have the <strings.h> header file. */
#undef HAVE_STRINGS_H

/* Define to 1 if you have the <string.h> header file. */
#undef HAVE_STRING_H

/* Define to 1 if the system has the type `struct sctp_assoc_value'. */
#undef HAVE_STRUCT_SCTP_ASSOC_VALUE

/* Define to 1 if you have the <sys/socket.h> header file. */
#undef HAVE_SYS_SOCKET_H

/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H

/* Define to 1 if you have the <sys/types.h> header file. */
#undef HAVE_SYS_TYPES_H

/* Have TCP_CONGESTION sockopt. */
#undef HAVE_TCP_CONGESTION

/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H

/* Define to the sub-directory where libtool stores uninstalled libraries. */
#undef LT_OBJDIR

/* Name of package */
#define PACKAGE "iperf"

/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT "https://github.com/esnet/iperf"

/* Define to the full name of this package. */
#define PACKAGE_NAME "iperf"

/* Define to the full name and version of this package. */
#define PACKAGE_STRING "iperf 3.1.3"

/* Define to the one symbol short name of this package. */
#define PACKAGE_TARNAME "iperf"

/* Define to the home page for this package. */
#define PACKAGE_URL "http://software.es.net/iperf/"

/* Define to the version of this package. */
#define PACKAGE_VERSION "3.1.3"

/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1

/* Version number of package */
#define VERSION "3.1.3"

2. src 目录下 version.h 同上，来源为version.h.in

/*
 * iperf, Copyright (c) 2014, The Regents of the University of
 * California, through Lawrence Berkeley National Laboratory (subject
 * to receipt of any required approvals from the U.S. Dept. of
 * Energy).  All rights reserved.
 *
 * If you have questions about your rights to use or distribute this
 * software, please contact Berkeley Lab's Technology Transfer
 * Department at TTD@lbl.gov.
 *
 * NOTICE.  This software is owned by the U.S. Department of Energy.
 * As such, the U.S. Government has been granted for itself and others
 * acting on its behalf a paid-up, nonexclusive, irrevocable,
 * worldwide license in the Software to reproduce, prepare derivative
 * works, and perform publicly and display publicly.  Beginning five
 * (5) years after the date permission to assert copyright is obtained
 * from the U.S. Department of Energy, and subject to any subsequent
 * five (5) year renewals, the U.S. Government is granted for itself
 * and others acting on its behalf a paid-up, nonexclusive,
 * irrevocable, worldwide license in the Software to reproduce,
 * prepare derivative works, distribute copies to the public, perform
 * publicly and display publicly, and to permit others to do so.
 *
 * This code is distributed under a BSD style license, see the LICENSE
 * file for complete information.
 */
#define IPERF_VERSION "3.1.3"

3.修改源码里面一个字符串，临时文件的路径

iperf_aip.c::

/tmp/ 这个是linux路径，android 上没有，直接改为 /data/ 或者就是当前运行目录。

最后，build

在app\build\intermediates\ndkBuild\debug\obj\local\arm64-v8a 得到可执行文件， push 到/data/xx上去运行。

附上测试命令：

1. 测试带宽

服务端：#iperf3 -s -p 5001
-s 表示作为服务端， -p 指定端口号

客户端：#iperf3 -c 127.0.0.1(服务器IP) -P 4 -t 30 -i 2 -p 5001
-c 表示作为客户端，后面跟服务端ip， -P (大写) 表示process，同时并发任务数，这里是4， -t 表示测试持续时间，单位秒。 -i 表示每隔2秒报一次结果。 -p 端口号

2. 测试udp 丢包

（udp无连接，发快网络带宽不够导致丢包，所以测udp在限制带宽的情况下丢包率）
服务端：#iperf3 -s -p 5001
客户端： #iperf3 -u -c 192.168.43.129 -p 8989 -b 100M -t 30
-u 指定使用udp， -c 表示作为客户端 -b 限制在100Mbit