1 votes 1 votes Consider a system in which DMA technique is used to transfer 16 MB of data from an I/O device into memory. The bandwidth of I/O device is 128 KB/s. What percentage of time is the CPU in busy mode (approximately)? tiger asked Dec 20, 2015 tiger 4.5k views answer comment Share Follow See 1 comment See all 1 1 comment reply joshi_nitish commented Jul 10, 2017 reply Follow Share processor clock frequency is also required... 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Explanation: Time taken by I/O device = 16 MB128 kB=128 sec Percentage time CPU is busy = 128128+28×100=82.05 Paras Nath answered Sep 16, 2016 Paras Nath comment Share Follow See 1 comment See all 1 1 comment reply nishitshah commented Jul 10, 2017 reply Follow Share 1. Can you tell me when will the CPU be in busy mode i.e. is it busy at the overhead time or when the actual data transfer is happening. ? 2. How did you get 28 sec time ? 0 votes 0 votes Please log in or register to add a comment.
–1 votes –1 votes here the time for i/o transfer is not given. sonali gupta answered Jan 6, 2016 sonali gupta comment Share Follow See all 0 reply Please log in or register to add a comment.