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Date Posted: 7/23/2008 2:00:50 AM  Status: Live
Operating System
Course Textbook Chapter Problem
N/A Operating System N/A N/A
Question Details:

Suppose the memory access time (Tmem) is 200 nsec ,the acess time for Translation Lookaside Buffer (TTLB) is 30 nsec and the hit ratio (HR) is 90%.Calculate the effective access time (Teffective)

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Date Posted: 7/23/2008 9:27:44 AM  Status: Live
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Please amend this example according to your require question.
 
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Date Posted: 7/28/2008 1:10:39 AM  Status: Live
Asker's Rating: None Provided    Moderator's Rating: Somewhat Helpful
Response:
 

Teffective = HR (TTLB + Tmem) + MR (TTLB + 2Tmem)

Tmem = 200 nsec

TTLB = 30 nsec

Hit ratio is 90%

Teffective = 0.9 (30 + 200) + 0.1 (30 + 2*200) nanoseconds

     =207+43 =250 nanoseconds



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