Please use this identifier to cite or link to this item: https://accedacris.ulpgc.es/jspui/handle/10553/158198
Title: CPU Accounting in CMP Processors
Authors: Luque, Carlos
Moreto, Miquel
Cazorla, Francisco J.
Gioiosa, Roberto
Buyuktosunoglu, Alper
Valero, Mateo
UNESCO Clasification: 120317 Informática
Keywords: Hardware
Operating Systems
Kernel
Multi-core/single-chip multiprocessors
Switches
Issue Date: 2009
Journal: IEEE Computer Architecture Letters 
Abstract: Chip-Multiprocessor (CMP) architectures introduce complexities when accounting CPU utilization to processes because the progress done by a process during an interval of time highly depends on the activity of the other processes it is co-scheduled with. In this paper, we identify how an inaccurate measurement of the CPU utilization affects several key aspects of the system like the process scheduling or the charging mechanism in data centers. We propose a new hardware accounting mechanism to improve the accuracy when measuring the CPU utilization in chip multiprocessors and compare it with the previous accounting mechanisms. Our results show that currently known mechanisms could lead to a 12% average error when it comes to CPU utilization accounting. Our proposal reduces this error to less than 1% in a modeled 4-core processor system.
URI: https://accedacris.ulpgc.es/jspui/handle/10553/158198
ISSN: 1556-6056
DOI: 10.1109/L-CA.2009.3
Source: IEEE Computer Architecture Letters, Volume 8, Issue 1, p. 17-20
Appears in Collections:Artículos
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