Block keeps a strong point to all object referenced in side of them, so all object will stay in heap as long as block dose,and when a object inside also has a strong point to the block, memory cycle happens.…

第八课: 1.协议 另一种安全处理id类型的方式如:id <MyProtocol> obj a.声明 //协议一般放于.h文件中或者在类的.h文件中 @protocol Foo <Xyzzy, NSObject>//<>中的内容表示还需实现自哪些协议,所有协议的根协议一般都是NSObject - (void)someMethod;//默认为必须实现的方法 @optional//可选方法声明 - (void)methodWithArgument:(BOOL)argumen…

学习OC有接触到一个新词Block(个人感觉又是一个牛气冲天的词),但不是新的概念,不是新的东西.学过Javascript的小伙伴对闭包应该不陌生吧~学过PHP的应该也不陌生,在PHP5.3版本以后也支持闭包, 也就是OC中所提到的Block. 到底什么是闭包或者block呢?用大白话说就是匿名函数,也就是在函数中可以包含这函数.就是在函数中可以定义匿名函数然后在函数中调用.学习OC中的block之前也小担心一下,Block在OC中属于高级的部分,心里有又有个疑问:学起来难不难?看过Block的…

来源: 伯乐在线 - 青玉伏案 链接:http://ios.jobbole.com/83229/ 学习OC有接触到一个新词Block(个人感觉又是一个牛气冲天的词),但不是新的概念,不是新的东西.学过Javascript的小伙伴对闭包应该不陌生吧~学过PHP的应该也不陌生,在PHP5.3版本以后也支持闭包, 也就是OC中所提到的Block. 到底什么是闭包或者block呢?用大白话说就是匿名函数,也就是在函数中可以包含这函数.就是在函数中可以定义匿名函数然后在函数中调用.学习OC中的block之…

  In the programs seen in previous chapters, all memory needs were determined before program execution by defining the variables needed. But there may be cases where the memory needs of a program can only be determined during runtime. For example, wh…

Memory kernel性能高低是不能单纯的从warp的执行上来解释的.比如之前博文涉及到的,将block的维度设置为warp大小的一半会导致load efficiency降低,这个问题无法用warp的调度或者并行性来解释.根本原因是获取global memory的方式很差劲. 众所周知,memory的操作在讲求效率的语言中占有极重的地位.low-latency和high-bandwidth是高性能的理想情况.但是购买拥有大容量,高性能的memory是不现实的,或者不经济的.因此,我们就要尽量…

BACKGROUND INFORMATION Various mechanisms exist for managing memory in a virtual machine environment. A virtual machine platform typically executes an underlying layer of software called a virtual machine monitor (VMM) which hosts one to many operati…

BACKGROUND Memory allocation systems assign blocks of memory on request. A memory allocation system employs an allocator to receive relatively large blocks of memory from an operating system and allocate that memory to satisfy memory requests. Upon r…

Described herein is a method and an apparatus for training a memory signal via an error signal of a memory. The method comprises transmitting from a memory controller a command-address (C/A) signal to a memory module; determining by the memory contro…

词条积累 1.NAND flash memory http://www.searchstorage.com.cn/whatis/word_6052.htm http://baike.baidu.com/subview/64506/5136742.htm?fromtitle=NAND%E9%97%AA%E5%AD%98&fromid=8051173&type=syn 2.FTL http://hi.baidu.com/alan_ding/item/7895367e324d5e3ed7a89c…