KR970010368B1 - 캐시라인 리프레이스장치 및 방법 - Google Patents
캐시라인 리프레이스장치 및 방법 Download PDFInfo
- Publication number
- KR970010368B1 KR970010368B1 KR1019940000879A KR19940000879A KR970010368B1 KR 970010368 B1 KR970010368 B1 KR 970010368B1 KR 1019940000879 A KR1019940000879 A KR 1019940000879A KR 19940000879 A KR19940000879 A KR 19940000879A KR 970010368 B1 KR970010368 B1 KR 970010368B1
- Authority
- KR
- South Korea
- Prior art keywords
- bus
- cache
- data
- cpu
- memory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0844—Multiple simultaneous or quasi-simultaneous cache accessing
- G06F12/0855—Overlapped cache accessing, e.g. pipeline
- G06F12/0859—Overlapped cache accessing, e.g. pipeline with reload from main memory
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Memory System Of A Hierarchy Structure (AREA)
Abstract
Description
Claims (6)
- CPU와 주메모리와 캐시메모리를 구비한 컴퓨터시스템에서, 캐시미스가 발생하였을 때 CPU/캐시버스의 캐시라인을 주메모리로 라이트백하고 원하는 캐시라인을 주메모리로부터 베모리버스로 리드하여 CPU/캐시버스로 전송하기 위한 캐시라인 리프레이스장치에 있어서, CPU/캐시버스의 라이트백데이타를 저장하기 위한 제1저장수단; 주메모리로부터 메모리버스로 리드한 데이타를 저장하기 위한 제2저장수단; 및 상기 제2저장수단에 저장된 데이타를 CPU/캐시버스로 전송한 다음, 계속하여 메모리버스의 데이타를 CPU/캐시버스로 전송하는 멀티플렉서를 포함함을 특징으로 하는 캐시라인 리프레이스장치.
- 제1항에 있어서, 상기 제2저장수단에 데이타가 저장될 때 카운트값을 증가하고, 상기 제2저장수단에서 데이타가 독출될 때 상기 카운트값을 감소하는 레지스터를 더 구비하여, 상기 멀티플렉서가 상기 레지스터의 카운트값에 따라 상기 제2저장수단에 저장된 데이타 또는 메모리버스의 데이타를 선택하여 CPU/캐시버스로 전송하는 것을 특징으로 하는 캐시라인 리프레이스장치.
- 제1항에 있어서, 상기 제1저장수단의 억세스레이턴시는 주메모리의 억세스레이턴시보다 작음을 특징으로 하는 캐시라인 리프레이스장치.
- 제1항에 있어서, 상기 제1저장수단 및 상기 제2저장수단은 데이타의 입출력이 선입선출방식으로 이루어짐을 특징으로 하는 캐시라인 리프레이스장치.
- CPU와 주메모리와 캐시메모리를 구비한 컴퓨터시스템에서, 캐시미스가 발생하였을 때, CPU/캐시버스의 캐시라인을 주메모리로 라이트백하고, 원하는 캐시라인을 주메모리로부터 메모리버스로 리드하여 CPU/캐시버스로 전송하기 위한 캐시라인 리프레이스 방법에 있어서, 주메모리 라이트백 할 데이타를 제1버퍼에 저장하는 제1과정 ; 상기 제1과정 동안 주메모리로부터 메모리버스로 리드한 데이타를 제2버퍼에 저장하는 제2과정 ; 상기 제2버퍼에 저장된 데이타를 CPU/캐시버스로 전송한 다음, 계속하여 메모리버스의 데이타를 CPU/캐시버스로 전송하는 제3과정 ; 및 상기 제1버퍼에 저장된 데이타를 주메모리에 라이트백하는 제4과정으로 이루어짐을 특징으로 하는 캐시라인 리프레이스방법.
- 제5항에 있어서, 상기 제2과정은, 상기 제3과정에서 상기 제2버퍼에 저장된 데이타를 CPU/캐시버스로 전송하는 동안에, 주메모리로부터 메모리버스로 리드로 데이타를 상기 제2버퍼에 계속하여 저장하는 것을 특징으로 하는 캐시라인 리프레이스방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940000879A KR970010368B1 (ko) | 1994-01-18 | 1994-01-18 | 캐시라인 리프레이스장치 및 방법 |
| JP11277394A JP3534822B2 (ja) | 1994-01-18 | 1994-05-26 | キャッシュラインリプレーシング装置及び方法 |
| US08/260,783 US5526508A (en) | 1994-01-18 | 1994-06-16 | Cache line replacing system for simultaneously storing data into read and write buffers having multiplexer which controls by counter value for bypassing read buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940000879A KR970010368B1 (ko) | 1994-01-18 | 1994-01-18 | 캐시라인 리프레이스장치 및 방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950024323A KR950024323A (ko) | 1995-08-21 |
| KR970010368B1 true KR970010368B1 (ko) | 1997-06-25 |
Family
ID=19375880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940000879A Expired - Lifetime KR970010368B1 (ko) | 1994-01-18 | 1994-01-18 | 캐시라인 리프레이스장치 및 방법 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5526508A (ko) |
| JP (1) | JP3534822B2 (ko) |
| KR (1) | KR970010368B1 (ko) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5812799A (en) * | 1995-06-07 | 1998-09-22 | Microunity Systems Engineering, Inc. | Non-blocking load buffer and a multiple-priority memory system for real-time multiprocessing |
| US6801979B1 (en) * | 1995-07-31 | 2004-10-05 | Lexar Media, Inc. | Method and apparatus for memory control circuit |
| US6076150A (en) * | 1995-08-10 | 2000-06-13 | Lsi Logic Corporation | Cache controller with improved instruction and data forwarding during refill operation |
| GB2308903B (en) * | 1996-01-05 | 2000-01-26 | Advanced Risc Mach Ltd | Cache memory circuit |
| US6038645A (en) * | 1996-08-28 | 2000-03-14 | Texas Instruments Incorporated | Microprocessor circuits, systems, and methods using a combined writeback queue and victim cache |
| US5870573A (en) * | 1996-10-18 | 1999-02-09 | Hewlett-Packard Company | Transistor switch used to isolate bus devices and/or translate bus voltage levels |
| AU1729100A (en) * | 1998-11-17 | 2000-06-05 | Lexar Media, Inc. | Method and apparatus for memory control circuit |
| US6298417B1 (en) * | 1998-11-20 | 2001-10-02 | International Business Machines Corporation | Pipelined cache memory deallocation and storeback |
| IL129345A (en) * | 1999-04-06 | 2004-05-12 | Broadcom Corp | Video encoding and video/audio/data multiplexing device |
| SE515897C2 (sv) * | 1999-04-12 | 2001-10-22 | Ericsson Telefon Ab L M | Anordning och förfarande för en avdelad buffert |
| US6591316B1 (en) * | 1999-05-20 | 2003-07-08 | Marconi Communications, Inc. | Avoiding fragmentation loss in high speed burst oriented packet memory interface |
| US6397300B1 (en) | 1999-06-25 | 2002-05-28 | International Business Machines Corporation | High performance store instruction management via imprecise local cache update mechanism |
| US6385694B1 (en) * | 1999-06-25 | 2002-05-07 | International Business Machines Corporation | High performance load instruction management via system bus with explicit register load and/or cache reload protocols |
| US6463507B1 (en) | 1999-06-25 | 2002-10-08 | International Business Machines Corporation | Layered local cache with lower level cache updating upper and lower level cache directories |
| US6405285B1 (en) | 1999-06-25 | 2002-06-11 | International Business Machines Corporation | Layered local cache mechanism with split register load bus and cache load bus |
| US6418513B1 (en) | 1999-06-25 | 2002-07-09 | International Business Machines Corporation | Queue-less and state-less layered local data cache mechanism |
| US6446166B1 (en) | 1999-06-25 | 2002-09-03 | International Business Machines Corporation | Method for upper level cache victim selection management by a lower level cache |
| US6434667B1 (en) | 1999-06-25 | 2002-08-13 | International Business Machines Corporation | Layered local cache with imprecise reload mechanism |
| US7000081B2 (en) * | 2002-02-12 | 2006-02-14 | Ip-First, Llc | Write back and invalidate mechanism for multiple cache lines |
| US7155548B2 (en) * | 2003-11-04 | 2006-12-26 | Texas Instruments Incorporated | Sequential device control with time-out function |
| US7296109B1 (en) * | 2004-01-29 | 2007-11-13 | Integrated Device Technology, Inc. | Buffer bypass circuit for reducing latency in information transfers to a bus |
| US20060282602A1 (en) * | 2005-06-09 | 2006-12-14 | Tse-Hsine Liao | Data transmission device and method thereof |
| WO2007097003A1 (ja) * | 2006-02-24 | 2007-08-30 | Fujitsu Limited | データ制御装置、データ制御方法およびデータ制御プログラム |
| WO2007097030A1 (ja) * | 2006-02-27 | 2007-08-30 | Fujitsu Limited | キャッシュ制御装置およびキャッシュ制御方法 |
| CN101673247B (zh) * | 2009-09-15 | 2011-10-19 | 威盛电子股份有限公司 | 内存管理系统与方法 |
| US8720072B2 (en) | 2010-08-11 | 2014-05-13 | Thomas J. Bucco | Razor with three-axis multi-position capability |
| KR101862785B1 (ko) * | 2011-10-17 | 2018-07-06 | 삼성전자주식회사 | 타일 기반 렌더링을 위한 캐쉬 메모리 시스템 및 캐슁 방법 |
| US20160179387A1 (en) * | 2014-12-19 | 2016-06-23 | Jayesh Gaur | Instruction and Logic for Managing Cumulative System Bandwidth through Dynamic Request Partitioning |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4195340A (en) * | 1977-12-22 | 1980-03-25 | Honeywell Information Systems Inc. | First in first out activity queue for a cache store |
| US5091846A (en) * | 1986-10-03 | 1992-02-25 | Intergraph Corporation | Cache providing caching/non-caching write-through and copyback modes for virtual addresses and including bus snooping to maintain coherency |
| US5025366A (en) * | 1988-01-20 | 1991-06-18 | Advanced Micro Devices, Inc. | Organization of an integrated cache unit for flexible usage in cache system design |
| US5222223A (en) * | 1989-02-03 | 1993-06-22 | Digital Equipment Corporation | Method and apparatus for ordering and queueing multiple memory requests |
| US5155832A (en) * | 1989-07-05 | 1992-10-13 | Hewlett-Packard Company | Method to increase performance in a multi-level cache system by the use of forced cache misses |
| US5043885A (en) * | 1989-08-08 | 1991-08-27 | International Business Machines Corporation | Data cache using dynamic frequency based replacement and boundary criteria |
| US5206941A (en) * | 1990-01-22 | 1993-04-27 | International Business Machines Corporation | Fast store-through cache memory |
| US5261066A (en) * | 1990-03-27 | 1993-11-09 | Digital Equipment Corporation | Data processing system and method with small fully-associative cache and prefetch buffers |
| US5249271A (en) * | 1990-06-04 | 1993-09-28 | Emulex Corporation | Buffer memory data flow controller |
| DE69127936T2 (de) * | 1990-06-29 | 1998-05-07 | Digital Equipment Corp | Busprotokoll für Prozessor mit write-back cache |
| US5404483A (en) * | 1990-06-29 | 1995-04-04 | Digital Equipment Corporation | Processor and method for delaying the processing of cache coherency transactions during outstanding cache fills |
| GB2256512B (en) * | 1991-06-04 | 1995-03-15 | Intel Corp | Second level cache controller unit and system |
| JP2881049B2 (ja) * | 1991-07-30 | 1999-04-12 | 株式会社日立製作所 | プリフェッチバッファ |
| EP0568231B1 (en) * | 1992-04-29 | 1999-03-10 | Sun Microsystems, Inc. | Methods and apparatus for providing multiple outstanding operations in a cache consistent multiple processor computer system |
| US5471598A (en) * | 1993-10-18 | 1995-11-28 | Cyrix Corporation | Data dependency detection and handling in a microprocessor with write buffer |
-
1994
- 1994-01-18 KR KR1019940000879A patent/KR970010368B1/ko not_active Expired - Lifetime
- 1994-05-26 JP JP11277394A patent/JP3534822B2/ja not_active Expired - Lifetime
- 1994-06-16 US US08/260,783 patent/US5526508A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5526508A (en) | 1996-06-11 |
| JP3534822B2 (ja) | 2004-06-07 |
| KR950024323A (ko) | 1995-08-21 |
| JPH07219844A (ja) | 1995-08-18 |
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