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Recent questions tagged cycle-stealing
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DMA Cycle Stealing
A DMA controller uses the main memory buffer. It employs cycle stealing to deposit input data to this buffer. Suppose the external device uses a 9600 band transfer rate. Also, suppose the primary memory transfer rate is 100 million words/second with every 5th instruction cycle stolen. How long will it take to transfer 10K data from the external device to the buffer?
A DMA controller uses the main memory buffer. It employs cycle stealing to deposit input data to this buffer. Suppose the external device uses a 9600 band transfer rate. ...
Balaji Jegan
531
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Balaji Jegan
asked
Dec 4, 2018
CO and Architecture
co-and-architecture
dma
numerical-answers
cycle-stealing
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1
votes
0
answers
2
Cycle Stealing DMA Doubt
Consider x = CPU time or data preparation time = 1 microsecond and y = data transfer time from DISK to DMA = 21 microseconds. % of memory cycles stolen = 1/(21) * 100 = 4.76% Doubt - For each 21 memory cycle, 1 memory cycle will be taken to ... . CPU can do its own work for 20 memory cycles and 1 memory cycle it will remain idle. What does this CPU cycle stealing means ?
Consider x = CPU time or data preparation time = 1 microsecond and y = data transfer time from DISK to DMA = 21 microseconds.% of memory cycles stolen = 1/(21) * 100 = ...
iarnav
2.1k
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iarnav
asked
Oct 5, 2018
CO and Architecture
co-and-architecture
cycle-stealing
doubt
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–
5
votes
1
answer
3
DMA Self Doubt
A device has been used in DMA. A word of 4 bytes can be transferred when it is available. The memory cycle time is 40 ms and CPU is idle for 10% of its time. What is the data transfer rate of the device for Burst mode and Cycle stealing mode. I'm getting Burst mode - 11.11 B/s Cycle stealing - 10 B/s Is it correct??
A device has been used in DMA. A word of 4 bytes can be transferred when it is available. The memory cycle time is 40 ms and CPU is idle for 10% of its time. What is the ...
Ashwin Kulkarni
1.7k
views
Ashwin Kulkarni
asked
Jan 9, 2018
CO and Architecture
dma
cycle-stealing
burst-mode
co-and-architecture
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