2,692,156 research outputs found
The Official Student Newspaper of UAS
UAS Answers: Everybody's got one... -- Campus Safety & Security (Clery Act) and Annual Fire Safety Reports -- The Cure for the Scholar with Wanderlust -- Holding onto Hope: A Review of The Oh Hellos -- Thanks for all the MSG -- Suddenly College: Stakeout in the Stacks -- October Snapshots -- Literary Traditions: The Four-Fold Exegesis -- Battling the Seasonal Blues -- Write, Write, Baby -- A Challenger Approaches -- Campus Calenda
Improving Phase Change Memory Performance with Data Content Aware Access
A prominent characteristic of write operation in Phase-Change Memory (PCM) is
that its latency and energy are sensitive to the data to be written as well as
the content that is overwritten. We observe that overwriting unknown memory
content can incur significantly higher latency and energy compared to
overwriting known all-zeros or all-ones content. This is because all-zeros or
all-ones content is overwritten by programming the PCM cells only in one
direction, i.e., using either SET or RESET operations, not both. In this paper,
we propose data content aware PCM writes (DATACON), a new mechanism that
reduces the latency and energy of PCM writes by redirecting these requests to
overwrite memory locations containing all-zeros or all-ones. DATACON operates
in three steps. First, it estimates how much a PCM write access would benefit
from overwriting known content (e.g., all-zeros, or all-ones) by
comprehensively considering the number of set bits in the data to be written,
and the energy-latency trade-offs for SET and RESET operations in PCM. Second,
it translates the write address to a physical address within memory that
contains the best type of content to overwrite, and records this translation in
a table for future accesses. We exploit data access locality in workloads to
minimize the address translation overhead. Third, it re-initializes unused
memory locations with known all-zeros or all-ones content in a manner that does
not interfere with regular read and write accesses. DATACON overwrites unknown
content only when it is absolutely necessary to do so. We evaluate DATACON with
workloads from state-of-the-art machine learning applications, SPEC CPU2017,
and NAS Parallel Benchmarks. Results demonstrate that DATACON significantly
improves system performance and memory system energy consumption compared to
the best of performance-oriented state-of-the-art techniques.Comment: 18 pages, 21 figures, accepted at ACM SIGPLAN International Symposium
on Memory Management (ISMM
Recommended from our members
Affirmations: How to Inspire Students to Revise
A product of creative thinking, inspiration is a sudden moment of clarity. Many
students lack clarity when asked to write in school–particularly those whose
color, gender and economic class place them on the outside looking into the
classroom. Language differences are primary concerns, and I don’t mean just
English as a Second Language. Those who grow up female, poor, or nonwhite
may find their ways with words at odds with expectations on how to write in
school. They need affirmations to inspire them to sweat over a draft, not to
mention face the fear of writing in school. Think about it. If you were a student
who struggled to write, regardless of the reason, all through school, what would
help you to write and want to do it? Positive feedback is my guess.University Writing Cente
- …