cse331-week15sp10 - CSE 331 Computer Organization and...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
CSE331 W15.1 KB Fall 2008 PSU CSE 331 Computer Organization and Design Fall 2010 Week 15 Section 1 and Section 2: Kabekode V. Bhat Course material on ANGEL: cms.psu.edu [Thanks to Mary Jane Irwin adapted from D. Patterson slides]
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CSE331 W15.2 KB Fall 2008 PSU Head’s Up Memory hierarchies - Reading assignment – PH: 7.1-7.2 Reminders CMPEN331 FINAL EXAM Filing grade corrections/updates-Deadline Week before Final Extra points/projects due (email [email protected] ) Dec/11/08.
Background image of page 2
CSE331 W15.3 KB Fall 2008 PSU To say that the P6 project had its share of people issues would be an understatement. Any effort that combines extreme creativity, mindbending stress, and colorful personalities has to account for the “people factor,” … The people factor is probably the least understood aspect of hardware design, and nothing you learn in graduate school compares with what a day-to-day, long-term, high-visibility, pressure-cooker project can teach you about your coworkers, or yourself. The Pentium Chronicles , Colwell, pg. 137
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CSE331 W15.4 KB Fall 2008 PSU Review: Major Components of a Computer Processor Control Datapath Memory Devices Input Output Cache Main Memory Secondary (Disk)
Background image of page 4
CSE331 W15.5 KB Fall 2008 PSU The Memory Hierarchy L1$ L2$ Main Memory Secondary Memory Increasing distance from the processor in access time Processor (Relative) size of the memory at each level Inclusive – what is in L1$ is a subset of what is in L2$ is a subset of what is in MM that is a subset of is in SM 4-8 bytes ( word ) 1 to 4 blocks 1,024+ bytes ( disk sector = page ) 8-32 bytes ( block ) Take advantage of the principle of locality to present the user with as much memory as is available in the cheapest technology at the speed offered by the fastest technology
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CSE331 W15.6 KB Fall 2008 PSU The Memory Hierarchy: Why Does it Work? Temporal Locality (Locality in Time): Keep most recently accessed instructions/datum closer to the processor Spatial Locality (Locality in Space): Move blocks consisting of contiguous words to the upper levels Lower Level Memory Upper Level Memory To Processor From Processor Blk X Blk Y
Background image of page 6
CSE331 W15.7 KB Fall 2008 PSU The Memory Hierarchy: Terminology Hit : data is in some block in the upper level ( Blk X ) Hit Rate : the fraction of memory accesses found in the upper level Hit Time : Time to access the upper level which consists of - RAM access time + Time to determine hit/miss Miss : data is not in the upper level so needs to be retrieved from a block in the lower level ( Blk Y ) Miss Rate = 1 - (Hit Rate) Miss Penalty : Time to replace a block in the upper level + Time to deliver the block to the processor Lower Level Memory Upper Level Memory To Processor From Processor Blk X Blk Y
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CSE331 W15.8 KB Fall 2008 PSU How is the Hierarchy Managed? registers
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/12/2010 for the course CMPEN 331 taught by Professor Bhat during the Spring '08 term at Pennsylvania State University, University Park.

Page1 / 38

cse331-week15sp10 - CSE 331 Computer Organization and...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online