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Topic: CPU cache

Related Topics

Clock rate

Athlon

Primary storage

Dynamic random access memory

64 bit

Core memory

Reduced Instruction Set Computer

Celeron

DLX

Victim cache

Cache

Classic RISC pipeline

Virtual memory

CPU architecture

CPU design

	CPU cache - Wikipedia, the free encyclopedia
		A CPU cache is a cache used by the central processing unit of a computer to reduce the average time to access memory.
		For a cache read miss happening to instruction cache, the processor, or at least the thread of execution, has to wait (stall) until the instruction is fetched from main memory.
		A victim cache is a cache used to hold blocks evicted from a CPU cache due to a conflict or capacity miss.
	en.wikipedia.org /wiki/CPU_cache (7028 words)

	Cache - Wikipedia, the free encyclopedia
		In computer science, a cache (pronounced /kæʃ/, like the English word cash) is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive (usually in terms of access time) to fetch or compute relative to reading the cache.
		Caches have proven extremely effective in many areas of computing because access patterns in typical computer applications have locality of reference.
		The cache of disk sectors in main memory is usually managed by the operating system kernel or file system.
	en.wikipedia.org /wiki/Cache (1853 words)

	PC Architecture. Chapter 10. The cache
		The cache stores are a central bridge between the RAM and the registers which exchange data with the processor’s execution units.
		CPU caches are a remedy against a very specific set of “bottleneck” problems.
		The cache system tries to ensure that relevant data is constantly being fetched from RAM, so that the CPU (ideally) never has to wait for data.
	www.karbosguide.com /books/pcarchitecture/chapter10.htm (847 words)

	CPU cache - PC-Media Tech Forums
		The chip with the larger cache should be faster because it can hold more of the commands in the L2 memory and not have to totally go back and reload them from the disk when it needs to reuse it again.
		The L2 cache used to be on the mobo itself as a row of chips.
		L2 cache that was located in the processor package but not directly on the die usually ran at half/one-third core speed when the core speed got to high for the SRAM that was being manufactured.
	forum.pcmech.com /showthread.php?t=58694 (780 words)

	HDD Cache Vs CPU Cache - Neowin.net
		HDD cache follows a similar principle in that it stores data from the platters based on what the operating system is doing (and the cache is of course much faster than reading/writing from the platters).
		Generally, the first CPU cache is an instruction cache that is designed to help branch prediction in order to prevent the performance loss that comes with the long pipelines of the new CPUs when they encounter a branch.
		The second cache is a high speed buffer between the CPU and the RAM memory that's on the motherboard.
	www.neowin.net /forum/index.php?showtopic=192160 (424 words)

	CPU Director
		CPU Director is compatible with both Mac OS 9.x and Mac OS X 10.2 or higher.
		The included utilities allow you to enable or disable the cache "on the fly", change the speed at which your backside cache operates and automatically enable the cache at this speed at boot time.
		CPU Director can become confused if it is run before the PLKEXT has finished loading, so it is best to wait 20 or 30 seconds before launching CPU Director after a fresh boot.
	www.powerlogix.com /products/cpudirector/index.html (2494 words)

	Theories About Modern CPU Cache (Site not responding. Last check: 2007-11-02)
		For example, the K5 CPU has a 16Kb data cache with 4-way association so the CPU can have 4-4Kb blocks of the main memory in the L1 cache.
		Now in the new CPU's, like the Coppermine and Athlon, if the CPU has to go to the main memory, it can mean that the CPU slows down to the speed of the main memory.
		The caches may be big, but the data and code L1 caches and even the L2 cache are only 2 way associative.
	www.overclockers.com /articles139 (734 words)

	Multimedia Streams and the CPU Cache (Site not responding. Last check: 2007-11-02)
		This paper discusses the use of the CPU cache when the processor is being used to manipulate stream data, in particular isochronous media such as as video.
		The principal idea is to enable data to avoid main memory and flow directly into a portion of the cache.
		When used with a ``cache aware'' operating system this method is shown to provide a rich support environment for multimedia manipulation.
	www.cl.cam.ac.uk /Research/SRG/bluebook/12/scache/scache.html (97 words)

	Cpu Cache question. - TechSpot Troubleshooting
		I built a pc and threw a Celeron D 478 2.93ghz cpu in there with a cache of 256kb.
		I thought a cpu was based mostly on the ghz, but now im looking into things, the cache has important play.
		Another task randomly accessing two gigabytes worth of data in RAM will gain or lose almost nothing from the CPU cache, but will depend largely on the speed of your memory subsystem, including the hard drives used for swapping.
	www.techspot.com /vb/all/windows/t-45691-Cpu-Cache-question.html (374 words)

	X-Setup Pro Forum - CPU Cache Mod
		But you know with my last cpu (Duron 1800), the mod reported that the cache settings were incorrect by default.
		I have a Pentium 4 Prescott 3.4GHz with 1Mb L2 cache running at 4.01GHz, and everything I have read on various forums says that by physically specifying the L2 cache size in the XP registry there is a noticeable speed improvement.
		This entry is designed as a secondary source of cache size information for computers on which the HAL cannot detect the L2 cache.
	www.x-setup.net /forum/printthread.php?t=372 (1268 words)

	hardCOREware Forum - upgrading cpu cache
		Then, they just release a "new" cpu with..
		That cache was running at 50% of the Pentium 3's CPU speed.
		Then, when they moved it to the CPU die, they made it the full speed of the CPU, but dropped the amount to 256k L2.
	www.hardcoreware.net /forum/printthread.php?t=5035 (296 words)

	Design of CPU Cache Memories (Site not responding. Last check: 2007-11-02)
		Abstract: We present an overview of the current issues in the design of CPU cache memories.
		Our stress is on those issues of greatest concern to cache designers and builders, including line size, associativity, real vs. virtual addressing, main memory update algorithm, split (data/instructions) cache vs. unified cache, cache consistency mechanisms, cache size and number of cache levels.
		Brief mention is made of other aspects of cache and S-unit design.
	techreports.lib.berkeley.edu /accessPages/CSD-87-357.html (83 words)

	What is L2 cache?
		SRAM (Static RAM) cache generally refers to the oldest of the three technologies, where the L2 cache is located on the system motherboard running at the speed of the Front Side Bus (FSB).
		An on-die L2 cache is a faster alternative to an SRAM cache, particularly as CPU clock speeds continue to increase.
		Though the size of the cache is larger, its FSB speed limit shows its effect as CPU clock speeds increase.
	www.cpuscorecard.com /cpufaqs/oct99a.htm (448 words)

	Changeing P4 CPU Cache - TechIMO Forums (Site not responding. Last check: 2007-11-02)
		Is there a way to change the CPU Cache level.
		I have a P4 3.4 ghz But L2 is 512K Cache can i change it to 1MB or more.
		Cache is a physical part of the CPU, It is not something you can change.
	www.techimo.com /forum/t128536.html (137 words)

	VMTN Discussion Forums: ESX and CPU Cache? ... (Site not responding. Last check: 2007-11-02)
		The cost hike is due to the amount of cache on the cpu.
		The reason larger caches in the Intel market have actually been better than clockspeed in enhancing ESX performance is that with the amount of memory IO being performed for ESX to do its thing, low latency memory access such as that provided by large caches will perform better.
		Also the AMD architecture, which I realize Dell has rejected, performs better at lower clockspeeds (and no L3 cache) than Intel with a high cache, because of the embeded Memory controller on the AMD chip and HT (Hyper Transport) which provides such low memory access latencies to all memory that L3 cache is unnecessary.
	www.vmware.com /community/message.jspa?messageID=141366 (369 words)

	PC-Media Tech Forums - Internal CPU cache problem
		Installed Windows 98 and still if I enable internal cpu cache, it will boot as far as "verifying DMI pool" and stop.
		If I disable internal cpu cache, it will boot normally, but then the system seems to run slow.
		There may be jumpers to define the CPU type and make.
	www.pcmech.com /forum/printthread.php?t=23578 (273 words)

	Annoyances.org - re: Internal CPU Cache Conflict (Windows XP Discussion Forum)
		I don't know if this will help or confuse, but there should be a setting in the BIOS for the Cache Type.
		If you're not comfortable with getting into the belly of the beast, you may have a technically oriented friend who can check the BIOS settings for you.
		Cache is memory, although it's part of the CPU.
	www.annoyances.org /exec/forum/winxp/1040110932 (270 words)

	Latest News. CPU Rightmark
		CPU Load and Throttled Clock are now reported as "N/A" when CPU does not support necessary features.
		Softpedia guarantees that RightMark CPU Clock Utility 1.4 is 100% FREE, which means it is a freeware product (both for personal and commercial use) that does not contain any form of malware, including but not limited to: spyware, viruses, trojans and backdoors.
		A64CLK (AMD64 Clock Utility) is a simple utility designed for realtime CPU frequency monitoring and realtime adjustment of the CPU multiplier (FID) and voltage level (VID) of the upported CPUs via processor's power management model specific registers (MSRs).
	cpu.rightmark.org (2759 words)

	CPU-Z
		The cache latency computation tool allows to gather information about the cache hierarchy of the system.
		Please notice that code caches are not reported.
		New CPUs support : AMD Opteron socket 939, Intel Pentium 4 Cedar Mill and Presler, Intel Xeon Paxville, Intel Pentium M Yonah SC & DC.
	www.cpuid.com /cpuz.php (1130 words)

	cpu cache errors mystery (Site not responding. Last check: 2007-11-02)
		The system has been rebooted at least twice after and the CPU seems to be operational at the moment.
		Description of Error: 3 parity errors have been detected in the Data portion of the Instruction Cache (I-Cache Data) in 1 Day(s).
		Description of Error: Due to errors indicated in the prior 100611 EMS Event(s), the monitor tried to deactivate the processor for current boot session and mark the processor for deconfiguration for the next boot session.
	www.webservertalk.com /message924741.html (710 words)

	eBay - cpu cache, Desktop Laptop Components, Networking items on eBay.com (Site not responding. Last check: 2007-11-02)
		TMS390 Sun Super SPARC CPU with cache controller TI
		Xeon PIII 900Mhz 2MB Cache CPU and Heat Sink SL4XZ 5 12V
		Intel Pentium III 500MHz CPU w 512 cache and 100MHz bus
	search-desc.ebay.com /search/search.dll?query=cpu+cache&newu=1&krd=1 (605 words)

	PCTechTalk - CPU cache
		I guess i noticed this doing the AMD vs Pentium, lots of the AMDs i saw the two lvls of cache, where the Pentium only had the one,...
		First thing to remember with cpu's is you can't really compare AMD and Pentium.
		When selecting the chip for you, its important to take into account the sort of things you plan to do on the machine.
	www.pctechtalk.com /forums/showthread.php?t=17982 (217 words)

	VideoHelp.com Forum Archive - CPU Cache
		I'm pretty sure the internal Data and Trace cache are combined in L1 cache.
		Not sure but I would suspect that the 'trace cache' is used for instructions and the data cache is used for data.
		It had no harddrive, a pair of 5 1/4 inch floppies and the CPU speed was measure in 1's of MHz.
	www.videohelp.com /forum/archive/t262057.html (630 words)

	CPU Cache? - MajorGeeks Support Forums
		I want a 3.0 ghz, I found 2 P4 3.0s but one has 512K cache and the other is double that.
		The large cache one is hte PRESCOTT cored P4, the 512 is the Northwood.
		Aircooled (thermalright SP120 on cpu, thermalright V1 on GPU)
	forums.majorgeeks.com /showthread.php?t=32797 (241 words)

	Page Table Management > Describing the Page Directory (Site not responding. Last check: 2007-11-02)
		automatically, hooks that are architecture dependent have to be explicitly left in the code for when the TLB and CPU caches need to be altered and flushed, even if they are null operations on some architectures like the x86.
		The initialization stage is then discussed, which shows how the page tables are initialized during boot strapping.
		Finally, I cover how the TLB and CPU caches are utilized.
	www.phptr.com /articles/article.asp?p=336868&seqNum=9 (884 words)

	Multimedia Streams and the CPU Cache (ResearchIndex)
		This document uses CoBlitz to cache paper downloads.
		If your firewall is blocking outgoing connections to port 3125, you can use these links to download local copies.
		Abstract: This paper discusses the use of the CPU cache when the processor is being used to manipulate stream data, in particular isochronous media such as as video.
	citeseer.ist.psu.edu /222408.html (361 words)

	Cpu cache? what the hell - TechSpot OpenBoards
		The higher the cache the better it is basically information stored on the chip is a pretty good not techie explanation....
		Level 1 Cache: 8 KB Level 2 Cache: 512 KB this has got me very confoosed
		I don't understand the l1 cache, look at this.
	www.techspot.com /vb/topic22735.html (418 words)

	CPU & Cache R&R Service
		This product includes the labor required to remove and replace any standard PowerPC 750/7400/7410/7450/7455 CPU and Cache with a new CPU and Cache
		This labor charge does not include the CPU part required for the operation.
		It is intended as a repair service for systems and upgrade cards requiring a CPU replacement for operation.
	daystar-store.com /browseproducts/CPU---Cache-R-R-Service.html (177 words)

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