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Consider a memory system with a level 1 cache of 32 KB and DRAM of 512 MB with the processor operating at 1 GHz. The latency to L1 cache is one cycle and the latency to DRAM is 100 cycles. In each mem?
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∙ 11y ago
The computation performs 8 FLOPS on 2 cache lines, i.e., 8 FLOPS in 200 ns. This corresponds to a computation
rate of 40 MFLOPS
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∙ 11y ago
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What is miss latency?
miss latency is the time (in cycles) the CPU waits when a miss happen in the cache. (the time needed to bring the data from the main memory to the cache).
Memory that relfects the number of clock cycles that pass while data is written to memory?
CAS Latency
What is a memory performance measurement in which the lower number is better performance?
Latency. The main latency figure is CAS Latency, also called CL Latency is the number of clock cycles that a RAM chip has to wait after being read or written, before it is ready to be read or written again. A lower latency means less time the computer has to wait before it can do another memory operation.
L1 is a type of?
L1 = Level 1. This is a shorthand notation for a very fast, tightly-coupled cache. Typically L1 caches are fairly small, but very fast - usually on the order of a couple of clock cycles latency (the time between when a processor make a read request to memory and the time the data is retrieved from memory). L2 = Level 2. This is another type of cache which is usually somewhat larger (usually by a factor of 16 or so bigger than L1), and slower (read: less expensive). Even though it is slower than L1, it is still much faster than accessing main memory. Systems that have multiple processors may use L2 for sharing information among the processors. That is, each processor has its own L1 cache, but only one L2 which is shared among the processors. Latency here is on the order of 16-32 clock cycles. Main memory (typically DDR2 or DDR3) can be 64-128+ clock cycles of latency. This means that if you have a very fast processor with no cache (or a cache that is too small) the processor will spend far more time (by a factor of 64 or more) just waiting for data to be retrieved from memory!
The higher the GHz the faster the computer processor speed?
yep, the more GHz u have the faster the processor GHz stands for gigaherz or the amount of processor cycles per second 1Hz is one cycle per second. 1KHz is 1000 cycles per second 1 MHz is 1000 kila cycles per second or 1,000,000 cycles per second 1 GHZ is 1000 mega cycles per second or 1000,000,000 cycles per second and so on....
Which is faster CL3 memory or CL5 memory?
cl3 CL - CAS Latency (column access strobe) refers to the number of clock cycles taken to read or write a column of data off a memory module. The lower the latency, the faster the read/write. RL - Row access strobe Latency (RAS Latency), similarlly, measures cycles taken to read\write a row of data.
What is the unit for measuring processor speeds?
Processor speeds are usually measured in hertz (cycles per second) And then there are FLOPS ... Floating point operations per second.
How many clock cycles does the CPU require to act on a command?
It depends on the processor. They often have a different number of Cycles per Instruction. (http://en.wikipedia.org/wiki/Cycles_Per_Instruction)
A 3.8-GHz processor performs work at a rate of?
3.8 billion machine cycles per second.
What is 800MHz?
The term "Mhz" stands for Megahertz, where hertz is the number of cycles per second, and Mega equals 1 000 000 (one million). Therefore, 800Mhz is 800x1000 cycles per second. The term Mhz is commonly applied in computers. For example, a 800Mhz Processor has 800 000 cycles/second and this is its computing speed.. In comparison, a common 2.3Ghz processor is much faster because it has 2 300 000 cycles/second.
What does 3Ghz mean?
3.06 GHz is equivalent to 3,060,000,000 Hz, or Hertz, named after Heinrich Hertz. Hz is the standard unit of measure for frequency, or the number of cycles per second. Hz are commonly used as a measure of the clock speed in a CPU.
Which is better 2x 2gb ddr2 1066 cl5 or 4x 1gb ddr2 1066 cl4?
THE "CL" stands for "CAS Latency" the number of clock cycles it takes before data starts to flow once a command is received. Low CAS latency is faster than high CAS. You would not be able to tell the difference between waiting 4 clock cycles as to 5 clock cycles since a 200MHz bus is 200 million clock cycles a second....go with whatever is cheaper and easy for you to handle when installing it. Personnally, I'd go for the 2X2GB, that is two less sticks of RAM you have to worry about going dead on you.
