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In-Line Interrupt Handling for Software Managed TLBs Aamer Jaleel and Bruce Jacob Electrical and Computer Engineering University of Maryland at College Park
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Usage Example: Demand Paging. Keep only active pages in memory ... Usage Example: Zero Fill On Demand. New data pages must carry no information (say be zeroed) ...
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Topics Motivations for VM Address translation Accelerating translation with TLBs Motivations for Virtual Memory Use Physical DRAM as a Cache for the Disk Address ...
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Virtual Memory March 23, 2000 Topics Motivations for VM Address translation Accelerating address translation with TLBs Pentium II/III memory system
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Physical and virtual memory, page tables, TLBs ... CritSec Attempt #1. int turn = 0; void enter_cs() while (turn == thread_id); void leave_cs ...
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Review of Abbreviations. Symbols: Components of the virtual address (VA) TLBI: TLB index ... 1 byte word size. 13. 12. 11. 10. 9. 8. 7. 6. 5. 4. 3. 2. 1. 0. 11 ...
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The course that gives CMU its Zip! Virtual Memory Oct. 29, 2002 Topics Motivations for VM Address translation Accelerating translation with TLBs
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GESTI N DE FICHEROS 5. S.O.I Temario Curso: 04/05. Gesti n de ... Cambio de contexto pesado (procesador entorno) TLB's, cach s, ... Comunicaci n v a mensajes ...
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Title: CSE 431. Computer Architecture Subject: Lecture 19 Author: Janie Irwin Last modified by: chi Created Date: 8/19/1997 4:58:46 PM Document presentation format
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Tour of the Black Holes of Computing! P6/Linux Memory System Topics P6 address translation Linux memory management Linux page fault handling Memory mapping
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huge miss penalty, thus pages should be fairly large (e.g., 4KB) ... Nightmare Scenario: ping pong effect! Capacity Misses: increase cache size. Cache Design Space ...
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Review of Memory Hierarchy
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memory images kept in secondary storage; ... 1-KB subpages for 4-Kbyte pages. Separate instruction and data MMUs. Can be disabled separately ...
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Title: Training Last modified by: Hany Ammar Created Date: 9/9/1996 11:50:52 AM Document presentation format: On-screen Show (4:3) Other titles: Times New Roman Arial ...
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One process can't interfere with another. Because they operate in different address spaces. User process cannot access privileged information ...
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WT. U/S. R/W. P=1 ... WT: write-through or write-back cache policy for this page table ... WT: write-through or write-back cache policy for this page. U/S: user ...
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Chapter Seven Sistemas de Mem ria parte B Mem ria Virtual
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Recitation 9 (Nov. 8) Outline Virtual memory Lab 6 hints Reminders Lab 6: Get correctness points Exam 2: Nov. 16 (Next Tue) Minglong Shao shaoml+213@cs.cmu.edu
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Title: Training Last modified by: Alok N Choudhary Created Date: 9/9/1996 11:50:52 AM Document presentation format: On-screen Show Other titles: Times New Roman Arial ...
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Page table is a collection of PTEs that maps a virtual page number to a PTE ... CPU evicts entries when a new entry must be added and no free slots exist ...
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Title: Main Tasks Author: Winnie IDA Last modified by: Gert Jervan, ESLAB/SaS/IDA, Link pings Universitet Created Date: 8/31/1998 10:45:28 AM Document presentation ...
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modified from: David Patterson Electrical Engineering and Computer Sciences University of California, Berkeley http://www.eecs.berkeley.edu/~pattrsn
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Computer Architecture Lecture 16: Virtual Memory Review: The Principle of Locality The Principle of Locality: Program access a relatively small portion of the address ...
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IBM claims to have found. a way to build 3D chips by stacking them together. ... technology is claimed to be the saving grace that extends Moore's law for now! ...
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Virtual Memory and Paging J. Nelson Amaral
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... fastest comparison based sorting algorithm when all keys fit in ... Quicksort vs. Radix as vary number keys: Instructions. Set size in keys. Instructions/key ...
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Pages should be large enough to amortize the high access time. ... Advantages (reduce number of writes to disk, amortize the cost). Dirty-bit. ...
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A. CD. WT. U/S. R/W. P=1 ... A: accessed (set by MMU on reads and writes, cleared by software) ... WT: write-through or write-back cache policy for this page table ...
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Bilkent University Department of Computer Engineering CS342 Operating Systems Chapter 8 Memory Management Strategies Dr. Selim Aksoy http://www.cs.bilkent.edu.tr/~saksoy
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Each MULTICS program has a segment table, with one descriptor per segment. ... Conversion of a 2-part MULTICS address into a main memory address ...
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Have a table of (seg, size) Protection: each entry has (nil, read, write, exec) ... seg. size. error. Oct 9, 2001. Virtual Memory & Translation. 16. Paging. Use ...
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Segmentation Memory-management scheme that supports user view of memory. A program is a collection of segments. A segment is a logical unit such as:
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This legal document must contain the legible name of the person conducting the ... 2 is outside of the customary meal time and lunch meals served during this time ...
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Prefetching comes in two flavors: Binding prefetch: Requests load directly into register. Must be correct address and register! Non-Binding prefetch: Load into cache. ...
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Find free physical page (swapping out current page if necessary) ... swap in page table. restart faulting instruction by returning from handler. ...
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Memory Hierarchy Page 520 The technology we used to build our memory hierarchy can be divided into ...
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... so that don t wait for lower level memory Write Back Write data to memory only when cache line is replaced We need a Dirty ... quick and/or too many ... growth ...
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Chapter 4 Memory Management 4.1 Basic memory management 4.2 Swapping 4.3 Virtual memory 4.4 Page replacement algorithms 4.5 Modeling page replacement algorithms
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Traditionally we lookup the TLB using all 20-bits of the VPN ... few bits are enough for TLB tag match lookup instead of the whole 20-bit VPN ...
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PPN: physical page number. CO: byte offset within cache line. CI: cache index. CT: cache tag ... PPN. PPO. 20. 12. Physical address. word offset into. physical ...
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Virtual Memory Space Partitioning. Based on programming language. Non-overlapped subdivisions ... Dj. Cj. Bc. Bf. bm. 23. ISLPED 2003. 24. ISLPED 2003. Design ...
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Microprocessors and Embedded Systems Lectures 39: Cache & Virtual Memory Review http://www.cse.unsw.edu.au/~cs3221 November, 2003 Saeid Nooshabadi
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One process can't interfere with another. because they operate in different address spaces. User process cannot access privileged information ...
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VM allows a program to run on a machine with less memory than it needs . Many programs don t need all of their code and data all at once (or ever), so this ...
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Transitions between states represented as arrows with inputs on arcs. ... each have one load of clothes. to wash, dry, and fold. Washer takes 30 minutes ...
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Memory Management Basic memory management Swapping Virtual memory Page replacement algorithms Modeling page replacement algorithms Design issues for paging systems
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... are passed through the argv[] array: int main (int argc, char * argv ... including the name of the program or command being executed ( passed as argv[0] ...
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Paging CS-502 Operating Systems Paging A different approach Addresses all of the issues of previous topic Introduces new issues of its own Memory Management ...
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Where to misses come from? Classifying Misses: 3 Cs ... by accessing 'blocks' of data repeatedly vs. going down whole columns or rows ...
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When no free extents of desired size is available, two choices: ... Page Coloring ... is that page coloring is less useful, since physical pages are contiguous. ...
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Logic: 2x in 3 years 2x in 3 years. DRAM: 4x in 3 ... WrEn. Precharge. Din 0. Din 1. Din 2. Din 3. A0. A1. A2. A3. Tarun Soni, Summer'03. Problems with SRAM ...
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Break 20-bit VPN into two 10-bit parts. VPN ... Dirty Bits and TLB: Two Solutions. TLB is ... Dirty bit present in both TLB and page table in MM. On first ...
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In this sense, they can be seen as a hardware abstraction layer. Previous microkernels perform ... Servers can't stomp on each other. Principle of integrity ...
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funny times, as most systems can't access all of 2nd level cache without TLB misses! ... composed of units that send messages over channels via ports. Units ...
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zero wait state access speed. power efficiency. reduced electromagnetic interference ... Option 2: Hardware traps to OS, up to OS to decide what to do ...
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Computers run lots of processes simultaneously. No full address ... Page size 4 kilobytes. Therefore: 0000. 0000. 0000. 0000. 0000. 0000. 0000. 0000. 0000. 0000 ...
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