[理工] [計組] 記憶體快取
看板Grad-ProbAsk作者steven1028 (Steven_Shie)時間11年前 (2012/12/05 14:36)推噓0(0推 0噓 0→)留言0則, 0人參與討論串1/2 (看更多)
Media applications that play audio or video files are part of a class of
workloads called "streaming" workloads; i.e., they bring in large amounts
of data but do not reuse much of it. Consider a video streaming workload
that accesses a 512 KB working set sequentially with the following address
stream:
0, 4, 8, 12, 16, 20, 24, 28, 32....
(1) Assume a 64 KB direct-mapped cache with a 32-byte line. What is the
miss rate for the address stream above. How is this miss rate sensitive
to the size of the cache or the working set? How would you categorize
the misses this workload is experiencing, based on the 3C model.
(2) Recompute the miss rate when the cache line size is 16 bytes, 64 bytes,
and 128 bytes? What kind of locality is this workload exploiting?
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