CS501 Assignment No 03 Solution & Discussion Due Date:21-01-2013

[+ M.Tariq Malik]

Assignment No. 03

Due Date:
Your assignment must be uploaded/submitted before or on21^st Jan, 2013
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Total Marks = 20

Question:

An I/O device transfers data at a rate of 5MB/s over a 100MB/s bus. The data is
transferred in 5KB block. If the processor operates at 400MHz, and it takes a total of 4000 cycles to handle each DMA request, find the fraction of CPU time handling the data transfer with and without DMA.

[+ M.Tariq Malik]

Our main purpose here discussion not just Solution

Please Discuss here about this assignment.Thanks

[Ali]

Almost the same question is in the handouts (snapshot below)

[+ ((( Zara) )))]

thnx ali..........

[Don't Display]

In assignment question figures are change...how we can done by formulatically

An I/O device transfers data at a rate of 5MB/s over a 100MB/s bus. The data is
transferred in 5KB block. If the processor operates at 400MHz, and it takes a total of 4000 cycles to handle each DMA request, find the fraction of CPU time handling the data transfer with and without DMA.

plz tell

[Adnan]

kia agr ma sirf warding change kr k book wali example lak lu tu tek ho ga

[Samiya Mansoor]

koi idea do na iss about k figures change hain to ab kia krna hai

[Don't Display]

dear value change han assignment ki....

koi btye ga k kesy krna ha solve

[faisal mehmood]

solution of half question will be as follows

Without DMA: The processor here copies the data into memory as it is sent over the bus. Since the I/O device sends data at a rate of 5MB/s over the 100MB/s bus, 5 % of each second is spent transferring data. Thus 5% of the CPU time is spent copying data to memory.

[faisal mehmood]

Solution of with DMA koi aur btaye to theek wrna, last date pe main hi bta dunga, don't worry sbke 20 aayenge :P

[Don't Display]

saeeda malik

ap ny value tu change ki nahi with DMA k solution men..pehly waly ki discussion again dy di.

[faisal mehmood]

Saeeda, inko paka pkaaya chahiye, khair hai naaa, jub itni effort ki hai ap ne to thori aur kr do! solution likhao ta k yeh sirf copy, paste aur changes kren :)

[GUL RUKH]

0.1 ans aya hai Saeeda sis.