• Keine Ergebnisse gefunden

Frequency Scaling:

N/A
N/A
Protected

Academic year: 2021

Aktie "Frequency Scaling:"

Copied!
1
0
0

Wird geladen.... (Jetzt Volltext ansehen)

Volltext

(1)

Praktikum Power Management

PM1/PM8

Frequency Scaling:

Implementierung des PAST-Algorithmus

Der Intel Atom unterst¨utzt 4 Taktraten zwischen 1600 und 800 MHz. Es soll der Al- gorithmus

”PAST“ von Weiser [1] implementiert werden. Ziel ist es, Idle-Phasen nach M¨oglichkeit zu eliminieren. Der Algorithmus merkt sich die L¨angen der aktiven und Idle- Phasen der vergangenen Sekunde und passt die Taktrate entsprechend an. Anhand des Zustands des Prozesses (TASK INTERRUPTIBLE bzw. TASK UNINTERRUPTIBLE) kann zwi- schen Soft- und Hard-Idle Zeiten unterschieden werden. Zum Umschalten der Taktrate siehe arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.cund drivers/cpufreq.

[1] M. Weiser, B. Welch, A. Demers, and S. Shenker. Scheduling for reduced CPU energy.

In Proceedings of the First Symposium on Operating System Design and Implementation OSDI’94, November 1994.

ftp://parcftp.xerox.com/pub/sprite/welch/osdi94.ps

Referenzen

ÄHNLICHE DOKUMENTE

For example, an automotive E/E engineering project with to-do lists for planning and checklists for quality assurance can be properly supported by a corresponding proCollab

Just make sure that you‘ve got two extra details for each

To simplify this expression we assume, that the mean free path will be much bigger than the film thickness, meaning Λ ≫ d. We are meant to determine the

As the prolongation of the RT to the auditory task due to the low-volume condition was very large, I also expected that it would aid the participants with recognizing the order of

As demonstrated, incentive contracts are tailored to the agent’s task-specific abilities and, particularly, depend on three factors: (i) the inefficiency of effort distortion as

Even if the Iranian government rejects this step, more US personnel should be assigned to overcoming logistical hurdles so that more Iranians can come to the United States

Six are his direct appointees to the Expediency Council—a body that is supposed to mediate disputes between government branches—and include Ali Akbar Velayati, a former

global). Single stimuli contain no distractor level at all. neutral stimuli have a distractor level that is meaningless with respect to the judgments. For congru- ent stimuli,