Case Study 3: Managing Contention for Shared Resources on Multicore Processors By Ja’Kedrick L. Pearson Professor Hossein Besharatian CIS 512 June 2, 2013 Memory contention Memory contention is a state an OS memory manager can reside in when to many memory requests are issued to it from an active application possibly leading to a DOS condition specific to that application. A test was run on a group of applications several times, on three different schedules
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multiprocessing, or MSMP, is when one CPU (the master) controls the system, all resources and scheduling. Only this master can execute the operating system. The other CPU’s are slaves that perform all of the work assigned by the master (Englander, 2009). This configuration is not widely used anymore. Conversely, Symmetrical multiprocessing, or SMP, is where each CPU has the same access to the operating system, all resources, and memory. In this set-up, each CPU is identical (Englander, 2009). In
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protects CPU resource from getting stuck by a user program. To ensure OS maintains control over the CPU, a timer can be set to interrupt the computer after a specified period. Use it to prevent a user program from running too long. 1.6 * A process is a program in execution. It is a unit of work in the system. A program by itself is not a process. It is a passive entity, like the contents of a file stored on disk, whereas a process is an active entity. 1.7 * To improve CPU utilization
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Task 1 1. The LGA1156 connector is used with Xeon processors and the purpose of the LGA1156 connector on the motherboard is to allow connections to be made from the processor to the rest of the system. 2. The H55 chipset is used with the Pentium i7-800 Intel, Intel core i5, and intel core i3. The purpose of the H55 chipset on the motherboard is to provide the interface for the PCI express lanes on the motherboard. 3. The gigabyte GA-H55M-UDah is incredibly affordable. And will likely
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A Look into Computer Memory Table of Contents Abstract 3 A Look into Computer Memory 4 Memory Hierarchy 4 Allocation Policies 5 Relocation Policies 6 Hit and Hit Ratio 6 Modern Computer Applications 7 Conclusion 7 References 8 Abstract The memory of a computer is a key component of the overall architecture of a computer. Several types of memory exist with the architecture of the computer which collectively is known as the memory hierarchy. The use of the memory hierarchy, placing
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processor known as the GMA HD. It differs by the number of Unified shaders in the G45 GMA X4500HD which was increased from 10 to 12. D) What is its purpose on the motherboard? Its purpose on the motherboard is to enable direct connection between the CPU and the graphics core. This allows the display information to be sent back to the H55 chipset for output. E) Gigabyte GA-H55M-UD2H motherboard. What interesting information can you find? The interesting information I found is that it supports the
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Unit 10 Analysis: Repair Shop The pros are: • The users personal files will be saved • The user will have a fresh start and a chance to take preventative measures to avoid future problems • All of the users data will be backed up The cons are: • The user may have to pay to reinstall certain programs • The user will have to reinstall old programs The user with the new computer will not likely be affected as much as the user who has ran their computer for several years. The new user
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in a block of memory is read, that block is transferred to one of the slots of the cache. Cache Operation: – CPU requests contents of memory location – Check cache for this data – If present, get from cache (fast) – If not present, read required block from main memory to cache – Then deliver from cache to CPU – Cache includes tags to identify which block of main memory is in each cache slot [pic] [pic] [pic] Fig:
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Microprocessor Evolution: 4004 to Pentium-4 Joel Emer Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology Based on the material prepared by Krste Asanovic and Arvind November 2, 2005 First Microprocessor Intel 4004, 1971 Image removed due to copyright restrictions. To view image, visit http://news.com.com/Images+Moores+L aw+turns+40/2009-1041_3-56490195.html November 2, 2005 6.823 L15- 2 Emer • 4-bit accumulator architecture
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Chapter 1 - IT Essentials - PC Hardware & Software 1 Which CPU architecture uses a small set of instructions that are designed to be executed rapidly? CISC RAID RISC RISK SCSI 2 Which type of memory is primarily used as cache memory? DRAM RAM ROM SRAM 3 Which three devices are considered output devices? (Choose three.) fingerprint scanner headphones keyboard monitor mouse Printer 4 Which type of ROM can be reprogrammed with software while it is still physically installed in the computer
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