int main() { _asm{ mov edi,edi mov edi,edi } ,Green,Yellow}; _asm{ mov edi,edi mov edi,edi } Color c=Red; //The only valid values that you can assign to an enumeration variable without a type //cast are the enumerator values used in defining the type…

问题说明:在一台zabbix被监控服务器上(64位centos6.8系统,64G内容)启动zabbix_agent,发现进程无法启动,10050端口没有起来! 启动zabbix_agent进程没有报错,但10050端口没有正常启动起来.[root@ctl ~]# /usr/local/zabbix/sbin/zabbix_agentd[root@ctl ~]# ps -ef|grep zabbix_agentroot 27506 27360 0 11:07 pts/5 00:00:00 grep…

InnoDB: The InnoDB memory heap is disabled InnoDB: Mutexes and rw_locks use GCC atomic builtins InnoDB: Compressed tables use zlib 1.2.3 InnoDB: mmap(2196766720 bytes) failed; errno 12 InnoDB: Fatal error: cannot allocate the memory for the buffer po…

问题状态:zabbix_server 不能启动,系统CentOS 6.7 原因分析:这是因为内核对share memory的限制造成的. 用到如下命令ipcs [-m|l|a],sysctl [-a|p] [root@server01 ~]# ipcs -l ------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 0 max total shared memory (kb…

目录 . 引言 . 页表 . 结构化内存管理 . 物理内存的管理 . SLAB分配器 . 处理器高速缓存和TLB控制 . 内存管理的概念 . 内存覆盖与内存交换 . 内存连续分配管理方式 . 内存非连续分配管理方式 . 虚拟内存的概念.特征及其实现 . 请求分页管理方式实现虚拟内存 . 页面置换算法 . 页面分配策略 . 页面抖动和工作集 . 缺页异常的处理 . 堆与内存管理 0. 引言 有两种类型的计算机,分别以不同的方法管理物理内存 . UMA计算机(一致内存访问 uniform memor…

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…

CUDA02 - 的内存调度与优化 前面一篇(传送门)简单介绍了CUDA的底层架构和一些线程调度方面的问题,但这只是整个CUDA的第一步,下一个问题在于数据的访存:包括数据以何种形式在CPU/GPU之间进行通信.迁移,以及在GPU内部进行存储.访问. 1 global .shared .constant.local 通常来讲,待计算的数据都存放在内存或者硬盘(外部存储设备)中,由CPU来进行调度.想要在device上计算.处理数据,就首先需要将数据转移至CUDA,这样的转移操作通常需要经过数据总…

METHOD 1: Consider the case where we do not know the number of elements in each row at compile time, i.e. both the number of rows and number of columns must be determined at run time. One way of doing this would be to create an array of pointers to t…

Managing Your App's Memory In this document How Android Manages Memory Sharing Memory Allocating and Reclaiming App Memory Restricting App Memory Switching Apps How Your App Should Manage Memory 「高效内存的16条策略」 Use services sparingly Release memory when…

How to Use DTrace to Troubleshoot Java Native Memory Problems on Oracle Solaris 11 Hands-On Labs of the System Admin and Developer Community of OTN by Wang Yu, Vincent Liu, and Gary Wang This lab will introduce the basic concepts of DTrace and provid…

  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…

  Article 1:Loading Win32/64 DLLs "manually" without LoadLibrary() The most important steps of DLL loading are: Mapping or loading the DLL into memory. Relocating offsets in the DLL using the relocating table of the DLL (if present). Resolving t…

Managed Heaps In general it can be categorized into 1) SOH and 2) LOH.  size lower than 85K will be in SOH, size larger than 85K will be in LOH. Small Object Heap GC will do 1) Mark 2) Sweep 3) Compact on SOH. How GC works When a small object is crea…

In this article, I will show you how to use the new version of MySQL (5.7+) and how to troubleshoot MySQL memory allocation more easily. by Alexander Rubin   Troubleshooting crashes is never a fun task, especially if MySQL does not report the cause o…

kmalloc #include <linux/slab.h> void *kmalloc(size_t size,int flags); void kfree(void *addr); flags: GFP_ATOMIC: Used to allocate memory from interrupt handlers and other code outside of a process context.Never sleeps GFP_KERNEL: Normal allocation o…

小结: 1. 数据库连接池. JDBC语句和结果对象必须显式地关闭. 2. 电梯到目标楼层后地址是否被释放 When a button is pressed: Get some memory, which will be used to remember the floor number Put the floor number into the memory Are we already on the target floor? If so, we have nothing to do: fi…

  Arcgis map export or print Error: Cannot map metafile into memory. Not enough memory Link: https://support.esri.com/en/technical-article/000004362 Error Message When exporting or printing a large map, the following error message is displayed. "Cann…

很多人在android开发中都遇到了生成bitmap时候内存溢出,也就是out of memory(OOM)的问题,网上对这样的问题的的解决说法不一.笔者作为一个初级开发者,在这里向大家提供一种比较实用,比较易于理解的方法,这种方法不如一些高级开发者提出的方案来的深刻,但是也能帮助大家有效地解决问题.废话不多说了,直接上代码. BitmapFactory.Options opt = new BitmapFactory.Options(); //这个isjustdecodebounds很重要 op…

Memory Access Patterns 大部分device一开始从global Memory获取数据,而且,大部分GPU应用表现会被带宽限制.因此最大化应用对global Memory带宽的使用时获取高性能的第一步.也就是说,global Memory的使用就没调节好,其它的优化方案也获取不到什么大效果,下面的内容会涉及到不少L1的知识,这部分了解下就好,L1在Maxwell之后就不用了,但是cache的知识点是不变的. Aligned and Coalesced Access 如下图所示…

keras 自适应分配显存 & 清理不用的变量释放 GPU 显存 Intro Are you running out of GPU memory when using keras or tensorflow deep learning models, but only some of the time? Are you curious about exactly how much GPU memory your tensorflow model uses during training? Are…

在做图片处理的时候最常遇到的问题估计就是Out Of Memory (内存溢出)了 网上对这种问题的解决方案很多,原来无非就是压缩图片大小 本不该重复造轮子,但实际中却遇见了问题,写出来希望后来者能引以为戒,并给出一个自我感觉不错的方案 常用的一种解决方案: FileInputStream f = new FileInputStream(file);BitmapFactory.Options options = new BitmapFactory.Options();   options.inS…

https://github.com/fancycode/MemoryModule MemoryModule is a library that can be used to load a DLL completely from memory - without storing on the disk first. The default windows API functions to load external libraries into a program (LoadLibrary,Lo…

http://www.freertos.org/a00111.html The RTOS kernel allocates RAM each time a task, queue, mutex, software timer or semaphore is created. The standard C library malloc() and free() functions can sometimes be used for this purpose, but ... they are no…

http://lwn.net/Articles/480055/ Back in December 2011, LWN reviewed the list of Android kernel patches in the linux-next staging directory. The merging of these drivers, one of which is a memory allocator called PMEM, holds the promise that the mainl…

https://developer.apple.com/library/content/documentation/Performance/Conceptual/ManagingMemory/Articles/AboutMemory.html#//apple_ref/doc/uid/20001880-99714-TPXREF106 Wired memory (also called resident memory) stores kernel code and data structures t…

http://www.bogotobogo.com/cplusplus/memoryallocation.php Variables and Memory Variables represent storage space in the computer's memory. Each variable presents a convenient names like number or result in the source code. Behind the scenes at runtime…

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…

A real-time operating system (RTOS) for use with minimal-memory controllers has a kernel for managing task execution, including context switching, a plurality of defined tasks, individual ones of the tasks having subroutines callable in nested levels…

Symptom You have questions related to the SAP HANA memory. You experience a high memory utilization or out of memory dumps. Environment SAP HANA Cause 1. Which indications exist for SAP HANA memory problems?2. How can I collect information about the…

在OpenCL中,用__local(或local)修饰的变量会被存放在一个计算单元(Compute Unit)的共享存储器区域中.对于nVidia的GPU,一个CU可以被映射为物理上的一块SM(Stream Multiprocessor):而对于AMD-ATi的GPU可以被映射为物理上的一块SIMD.不管是SM也好,SIMD也罢,它们都有一个在本计算单元中被所有线程(OpenCL中称为Work Item)所共享的共享存储器.因此,在一个计算单元内,可以通过local shared memory来…