MeekJeen

Warning!

This gist was moved to:

https://github.com/EXL/Stuff/tree/master/Examples/Linux-OpenGL-ES

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	/**
	* 用AudioManager获取音频焦点避免音视频声音重叠问题
	*/
	public class AudioFocusManager {

	private static final String TAG = "AudioFocusManager";

	private Context mContext;
	private AudioManager mAudioManager;
	private AudioManager.OnAudioFocusChangeListener mAudioFocusChangeListener;

	#include "logger.h"


	int DebugLevel = DEBUG_WARN;

	int main(void)
	{
	DBGPRINT(DEBUG_WARN, ("hello,debug=%s\n", "aaa"));
	return 0;
	}

	#!/bin/bash

	rm -rf CMake*

	export NDK=/home/syoyo/local/android-ndk-r10e
	export SYSROOT=$NDK/platforms/android-21/arch-arm64

	export CC="$NDK/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-gcc"

	export CXX="$NDK/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-g++"


	#include <iostream>
	#include <locale>
	#include <string>
	#include "voe_base.h"
	#include "voe_codec.h"
	#include "voe_volume_control.h"
	#include "voe_dtmf.h"
	#include "voe_rtp_rtcp.h"
	#include "voe_audio_processing.h"

	----

	Linux 基于策略的路由(Linux Policy Routing)

	Linux 有传统的基于数据包目的地址的路由算法，和新的基于策略的路由算法
	新算法优点：支持多个路由表，支持按数据报属性（源地址、目的地址、协议、端口、数据包大小、内容等）选择不同路由表


	# 查看规则命令，后面可跟其它参数，默认为 show(list) 显示全部
	ip rule

	#!/bin/sh

	while :
	do
	dev=$(ip link \| grep state \| awk '{ sub(":", "", $2); print $2 }' \| grep vpn)
	if [ $? -ne 0 ]; then
	sleep 5
	continue
	fi
	break