Q6) A hard real time task of 1000 instructions (each instruction is of 1- byte) is running by a processor of 12 CPI (due to cache), with cache, and memory cycle (read or write in the main memory) of 10 processor clocks. The deadline of the task is 1 nano sec. 25% of the instructions requested memory access. Statistical observations show that 90% of the memory accesses are for read (from cache) whereas only 10%

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Q6) A hard real time task of 1000 instructions (each instruction is of 1-
byte) is running by a processor of 12 CPI (due to cache), with cache,
and memory cycle (read or write in the main memory) of 10 processor
clocks. The deadline of the task is 1 nano sec. 25% of the instructions
requested memory access. Statistical observations show that 90% of
the memory accesses are for read (from cache), whereas only 10%
are for writes (main memory). Determine the minimum processor clock
to execute the task within its deadline.
Transcribed Image Text:Q6) A hard real time task of 1000 instructions (each instruction is of 1- byte) is running by a processor of 12 CPI (due to cache), with cache, and memory cycle (read or write in the main memory) of 10 processor clocks. The deadline of the task is 1 nano sec. 25% of the instructions requested memory access. Statistical observations show that 90% of the memory accesses are for read (from cache), whereas only 10% are for writes (main memory). Determine the minimum processor clock to execute the task within its deadline.
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