The prioritization of large memory page mapping is a function of the access bits in the L1 page table. In a first phase of operation, the number of set access bits in each of the L1 page tables is counted periodically and a current count value is cal…

A processor including a virtualization system of the processor with a memory virtualization support system to map a reference to guest-physical memory made by guest software executable on a virtual machine which in turn is executable on a host machin…

C Configuring Large Memory Optimization This appendix provides information for configuring memory optimization with large page tables on the Linux operating system, using Hugepages. It contains the following topics: Overview of HugePages Restrictions…

BACKGROUND INFORMATION An embodiment of the present invention relates generally to virtualization platforms and, more specifically, to a system and method to run components of a virtual machine monitor at a reduced privilege level. Various mechanisms…

A system and method in one embodiment includes modules for detecting an access attempt to a critical address space (CAS) of a guest operating system (OS) that has implemented address space layout randomization in a hypervisor environment, identifying…

A binary search tree is provided for efficiently organizing values for a set of items, even when values are duplicated. In generating the binary search tree, the value of each item in a set of values is determined. If a particular value is unique and…

A processor of a plurality of processors includes a processor core and a message manager. The message manager is in communication with the processor core. The message manager to receive a message from a second processor of the plurality of processors…

FIELD OF THE INVENTION The present invention is related to computing systems, and more particularly to a system and method for adjusting to changes in processor performance. BACKGROUND INFORMATION Designers of mobile computing platforms are faced wit…

An apparatus, system, and method are provided for automatically minimizing Real-Time (RT) task latency and maximizing Non-Real Time (NRT) task throughput. The apparatus may include a task manager, a determination module, and optionally a tracking mod…

COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION The basic mechanism for reading a word from memory involves the translation of a virtual, or logical, address, consisting of page number and offset, into a physical addres…

redis报错Windows error 0x70 redis 嫌弃你内存不够了,就给你不开第二个实例. The Windows version of Redis allocates a large memory mapped file for sharing the heap with the forked process used in persistence operations.这句话说的很明白了 解决办法: 1:改redis.windows.conf中的maxheap参数 maxhea…

A system and method for address space layout randomization ("ASLR") for a Windows operating system is disclosed. The address space layout includes one or more memory regions that are identified and then a particular implementation of the system…

  All of the physical pages in the system are described by the mem_map  data structure which is a list of mem_map_t    typedef struct page { // these must be first (free area handling) struct page        *next;struct page        *prev;struct inode   …

One of the problems with developing embedded systems is the detection of memory leaks; I've found three tools that are useful for this. These tools are used to detect application program errors, not kernel memory leaks. Two of these tools (mtrace and…

关键词:warn_alloc().__GFP_XXX.order.CMA等等. 在内存申请的时候经常会遇到类似“ xxx: page allocation failure: order:10...”类型的问题,这是warn_alloc()的输出. warn_alloc()被如下函数调用:__alloc_pages_slowpath().__vmalloc_area_node().__vmalloc_node_range. 下面分三部分了解这种问题的来龙去脉: 什么情况会导致warn_alloc(…

场景:领导电话通知,我们的主站宕机了,到家后从另外一台机器上ssh一直处于等待状态,开始怀疑机器的负载比较高,后查看监控机器,发现网卡.cpu.nginx连接数.....通通都没有数据了,显然不是负载高度问题了,应该是机器死机了,立刻通过ipmi重启机器重启机器后,机器正常!其实这个机器都正常运行大半年了,没啥问题! 查询/var/log/messages,发现大量的信息如下: 点击(此处)折叠或打开 Mar 12 11:15:04 hy1 kernel: php-fpm: page alloc…

A data processor supports the use of multiple memory models by computer programs. At a device external to a data processor, such as a memory controller, memory transactions requests are received from the data processor. Each memory transaction reques…

Aspects of the invention relate to improvements to the Least Recently Used (LRU) cache replacement method. Weighted LRU (WLRU) and Compact Weighted LRU (CWLRU) are CPU cache replacement methods that have superior hit rates to LRU replacement for prog…

In one embodiment, a method includes transitioning control to a virtual machine (VM) from a virtual machine monitor (VMM), determining that a VMM timer indicator is set to an enabling value, and identifying a VMM timer value configured by the VMM. Th…

System.Data.Objects.EntityFunctions和System.Data.Objects.SqlClient.SqlFunctions中的方法进行比较,如下 where System.Data.Objects.SqlClient.SqlFunctions.DateDiff("s",DateTime.Now,u.Time)>0 where System.Data.Objects.EntityFunctions.DiffSeconds(DateTime.Now,…

if (!string.IsNullOrEmpty(FarmWorkId)) { data = data.Where(p => p.TypeId == Convert.ToInt32(FarmWorkId)); } 解决方法: if (!string.IsNullOrEmpty(FarmWorkId)) { int i = Convert.ToInt32(FarmWorkId); data = data.Where(p => p.TypeId == i); }…

import * as _ from "lodash"; import paramCache from "../common/param-cache" import RequestPromise from "./axios-service/RequestPromise"; export const fetchSystemParams = () => { return RequestPromise({ url: '/api/system-pa…

Memory Profilers In this document Memory Monitor Heap Viewer Allocation Tracker You should also read Memory Monitor Walkthrough Heap Viewer Walkthrough Allocation Tracker Walkthrough 1.简介 Heap Viewer, Memory Monitor, and Allocation Tracker are comple…

A system and method for accessing memory are provided. The system comprises a lookup buffer for storing one or more page table entries, wherein each of the one or more page table entries comprises at least a virtual page number and a physical page nu…

In a computing system, cache coherency is performed by selecting one of a plurality of coherency protocols for a first memory transaction. Each of the plurality of coherency protocols has a unique set of cache states that may be applied to cached dat…

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…

Memory Detail Vmstat 查看/proc/vmstat 文件的内容 1. Memory Pages In / Out type: GraphUnit: shortLabel: PagesPagesin - 从启动到现在读入的内存页数的速率(5分钟内) /proc/vmstat pgpgin metrics: irate(node_vmstat_pgpgin{instance=~"$node:$port",job=~"$job"}[5m]) Pages…

see also: 韩国人的教材:http://ddii.pe.kr/ Section 1.1 – Implement and Manage complex storage Determine use cases for and configure VMware DirectPath I/O Determine requirements for and configure NPIV Determine appropriate RAID level for various Virtual Mach…

vNUMA介绍 http://virtualbarker.com/ vSphere VMware Performance With every release of vSphere the overhead of running an application on the vSphere virtualized platform is reduced by the new performance improving features. Typical virtualization overhea…

BACKGROUND A virtual machine (VM) architecture logically partitions a physical machine, such that the underlying hardware of the machine is time-shared and appears as one or more independently operation virtual machines. A computer platform in a virt…