Thin Client Power Efficiency

Thin Client Power Efficiency W. Vereecken, W Vereecken L. L Deboosere Deboosere, P P. Simoens Simoens, B B. Vermeulen, D.Colle, C. Develder, M. Pickavet, B Dhoedt, B. Dhoedt P P. Demeester

Vakgroep Informatietechnologie – IBCN

ICT Power Consumption Forecast Yearly Power Consumption Forecast 500

Pow wer Consum mption (GW))

450 400 350 300 250 200 150 100 50 0 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

Data Center

PCs

Thin Client Power Efficiency– Willem Vereecken Vakgroep Informatietechnologie – IBCN

Network Equipment

TVs

Other

p. 2

Thin Client Computing


p. 3

Thin Client Computing + Client terminal consumption is significantly lower (4W) + More efficient use of resources in the server + Less performance requirements i t for f the th client terminal → Longer life cycle

- Additional equipment required - Thin client protocol overhead - Network and server q p needs to be equipment cooled


p. 4

Mathematical Model

Active State Analysis z z

Desktop D kt PC Thin Client setup

Passive State Analysis z z z

What about idle users? Optimizing server farm Optimizing the network


p. 5

Mathematical Model

Active State d d Ptot = P0d + αCPU λdCPU

P

tc

(

) (

)

1 c n s s s s = P0 + P0 + P0 + αCPUλ CPU + αnT + αNIC b N

d ⎡ ⎤ C s d λ CPU = N⎢λ CPU + ε⎥ s C ⎢⎣ ⎥⎦


p. 6

Mathimatical Model

Passive State

d Pd = Pact −

∑

* =sb,off

tc PItc = Pact −

∑

( P0d,act − P0d,* ) − Nu Nu*

Nusb + Nuoff Nu

d α CPU λdCPU

( P0c,act − P0c,* ) Nu Nu*

* =sb,off Nusb + Nuoff s 1 s − α CPUλ CPU,AS u N

N

−

Nusb + Nuoff Nu

s (αnT + αNIC )b


p. 7

Mathemathical Model

Passive state (cont’d) z

S Servers standby/shut t db / h t d down when h possible ibl u u + N N s off 1 P s PIItc = PItc − sb − P 0,sb b N 0,actt Nu u u + N N 1 s tc tc sb off PIII = PII − P0,sbb − P0s,offff N Nu Simplified

( (

z

u N tc PIII = act P tc u

N

) )

Nuoff n + P u 0 N


p. 8

Mathemathical Model

Passive State (cont’d) z

R d Reduced d power states t t iin th the network t k tc tc PIV = PIII −

n ( P0n − Pred d) u N

Nuoff


p. 9

Equipment

PC: AMD Athlon 64 3500+ Client C Device: JackPC C Server: AMD Opteron 2212 Network

z z z

ADSL2 VDSL2 PON

(based on European Code of Conduct on Energy Consumption of Broadband Equipment)


p. 10

Experimental Results


p. 11


ΔP = P[desktop] – P[thin client] R = P[desktop] / P[thin client]


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70

350%

60

300%

50

250%

40

200%

R

ΔP(W)


30

150%

20

100%

10

50%

0

0%

TC D

0

5

10

15

20

0

2

4

ADSL2

8

10

12

14

16

18

20

N

N Pn = 0

6

VDSL2

PON


Pn = 0

ADSL2

VDSL2

PON

p. 13

Experimental Results 300% 250%

R

200% 150%

TC 100%

D 50% 0% 0%

10% 20% 30% 40%

50% 60% 70% 80% 90% 100%

Nuoff/Nu I Thin Client Power Efficiency– Willem Vereecken Vakgroep Informatietechnologie – IBCN

II

III

IV p. 14

300%

300%

250%

250%

200%

200%

R

R


150%

150%

TC

TC

100%

100%

D

D

50%

50%

0%

0% 0%

10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

0%

10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Nuoff/Nu I

II

III

Nuoff/Nu IV


I

II

III

IV

p. 15

Conclusions

Worldwide energy footprint of ICTs is high, increasing rapidly and unsustainable The thin client paradigm has a large potential i l in i reducing d i this hi footprint f i

z z

More efficient use of resources Reducing life cycle impact

Some caveats need to be considered z

z

Power consumption of individual devices needs to be kept under control Reduced power states in server farm and network need to be obtained


p. 16

Thank you for your attention Questions?

Vakgroep Informatietechnologie – IBCN