Plz Discuss this assignment
Assignment No. 05
CS501: Advanced Computer Architecture
Total Marks: 20
Due Date: 03-07-13
Please read the following instructions carefully before assignment submission.
It should be clear that your assignment will not get any credit if:
The objective of this assignment is:
Suppose we have a benchmark that executes in 100 seconds of elapsed time, where 90 seconds is CPU time and the rest is I/O (Input/output) time. If CPU time improves by 50% per year for the next five years but I/O time doesn’t improve, how much faster will our program run at the end of five years?
You are required to calculate the CPU improved performance and improved elapsed time.
Question No 2: (4 marks)
Consider a 20 MIPS (Microprocessor without Interlocked Pipeline Stages) processor with several input devices attached to it, each running at 1000 characters per second. Assume that it takes 17 instructions to handle an interrupt. If the hardware interrupt response takes 1msec, what is the maximum number of devices that can be handled simultaneously?
NOTE: Theoretical answer will not be considered
Question No 3: (6 Marks)
If we want the lowest latency for an I/O operation to a single I/O device; while in terms of lowest impact on processor utilization from a single I/O device then what will be the orders/arrangements of Interrupt driven, DMA(Direct Memory Access) and polling in both scenarios? Explain reasons.
NOTE: Give answer within 3-5 lines. Otherwise answer will not be considered.
GOOD LUCK J
system improvement 100/22 mn 22 kahan sy aya?Sana Rajpoot plz explain sis
yar ye 1.5 kaha se aata ha
yar ye denominator main har bar 1.5 kaha se aata ha????
scenario no 1.If we want the lowest latency for an I/O operation to a single I/O device;
scenario no 2. while in terms of lowest impact on processor utilization from a single I/O device
i hope q no 3 will be clear now every one can answer.
read lect 26, 27, 28, 31 and conclude your answer in 3-5 lines
Good effort . Thanx BFSS sis
no need to say thanks bas dua ker dia karin dunyia aur akhirat main kamyabi aur kamrani ki
Allah hum sab ko dunyia aur akhirat main kamyabi aur kamrani ata farmai...! Ameen
Q #2 ki example ki calculation theek ni hui. kindly calculation kr k chk kr lain
and BFSS sis agar ap Q # 3 ki arrangements just bta dain to maharbani ho gi, comments hm khud explain kr lain gay
DMA: A mechanism that provides a device controller with the ability to transfer data directly to or from the memory without involving the processor.
For Q 3 i found,
2. Interrupt Driven I/O
If i am wrong plz correct me with reason??? m waiting........
i think DMA is first and than Interrupt driven because DMA has higher priority than interrupt
i think the order wud b
3. Interrupt Driven I/O
firstly DMA uses less CPU n then polling involves less CPU comparitively n then Interrupt driven....