assessing and evaluting (3) (1)

8/20/2019 Assessing and Evaluting (3) (1)

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ASSESSING AND EVALUTINGPERFORMANCE

By

Sateesh D154553


2/28

PERFORMANCE

• Measure Re!"rt a#$ Su%%ar&'e

• Ma(e te))&*e#t +h"&+es

• See thr"u*h the %ar(et* hy!e• ,hat -a+t"rs "- the syste%

!er-"r%a#+e &s

.ar$ /are a#$ s"-t /are re)ate$0• ."/ $"es %a+he stru+t&"# set

ae+ts !er-"r%a#+e0


3/28

,h&+h has the 2est!er-"r%a#+e0

• ,h&+h &s -aster0

• ,h&+h &s 2&**er0

• ,h&+h !)a#e %"es %"st #u%2er "-!asse#*ers )east t&%e


4/28

Per-"r%a#+e Metr&+s

• Pur+has* !ers!e+t&e – *&e# a +"))e+t&"# "- %a+hes /h&+h has the

• 2est !er-"r%a#+e 0• )east +"st 0• 2est +"st!er-"r%a#+e0

• Des&*# !ers!e+t&e – -a+e$ /&th $es&*# "!t&"#s /h&+h has the

• 2est !er-"r%a#+e &%!r"e%e#t 0• )east +"st 0• 2est +"st!er-"r%a#+e0

• B"th reu&re – 2as&s -"r +"%!ar&s"#

– %etr&+ -"r ea)uat&"#• Our *"a) &s t" u#$ersta#$ /hat -a+t"rs the

ar+h&te+ture +"#tr&2ute t" "era)) syste%!er-"r%a#+e a#$ the re)at&e &%!"rta#+e 6a#$ +"st7

"- these -a+t"rs


5/28

Res!"#se T&%e a#$ Thr"u*h!ut

• Res!"#se t&%e

– ."/ )"#* &t ta(es t" $" a tas(

• Thr"u*h!ut

– T"ta) /"r( $"#e !er u#&t t&%e• e8*8 tas(stra#sa+t&"#s9 !er h"ur

• ."/ are res!"#se t&%e a#$ thr"u*h!utae+te$ 2y

– Re!)a+* the !r"+ess"r /&th a -asterers&"#0

– A$$* %"re !r"+ess"rs0


6/28

Measur* E:e+ut&"# T&%e

• E)a!se$ t&%e – T"ta) res!"#se t&%e +)u$* a)) as!e+ts

• Pr"+ess* IO OS "erhea$ &$)e t&%e

– Deter%es syste% !er-"r%a#+e

• CPU t&%e – T&%e s!e#t !r"+ess* a *&e# ;"2

• D&s+"u#ts IO t&%e "ther ;"2s< shares

– Ca# 2e 2r"(e# u! t" user CPU t&%ea#$

syste% CPU t&%e• Our -"+us= CPU USER TIME= T&%e s!e#t

e:e+ut* the


7/28

Re)at&e Per-"r%a#+e

• Per-"r%a#+e > 1E:e+ut&"# T&%e

• ?@ &s n t&%e -aster tha#

!er-"r%a#+e :!er-"r%a#+e y > #

• E:a%!)e= t&%e ta(e# t" ru# a !r"*ra%

1s "# A 15s "# B

• E:e+ut&"# T&%e B E:e+ut&"# T&%e A> 15s 1s > 185

• S" A &s 185 t&%es -aster tha# B


8/28

CPU T&%e

• Per-"r%a#+e &%!r"e$ 2y – Re$u+* #u%2er "- +)"+( +y+)es

– I#+reas* +)"+( rate

– .ar$/are $es&*#er %ust "-te# tra$e "+)"+( rate a*ast +y+)e +"u#t

RateClock

CyclesClockCPU

TimeCycleClockCyclesClockCPUTimeCPU

=

×=


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CPI E:a%!)e• C"%!uter A= Cy+)e T&%e > 5!s CPI > 8

• C"%!uter B= Cy+)e T&%e > 5!s CPI > 18• Sa%e ISA

• ,h&+h &s -aster a#$ 2y h"/ %u+h0

P&t-a)) = E:!e+t* the &%!r"e%e#t "-"#e as!e+t a +"%!uter t" +rease!er-"r%a#+e 2y a# a%"u#t !r"!"rt&"#a) t"

1.2500psI600psI

ATimeCPU

BTimeCPU

600psI500ps1.2I

BTimeCycle

BCPICountnInstuctio

BTimeCPU

500psI250ps2.0I

ATimeCycle

ACPICountnInstuctio

ATimeCPU

=×

×=

×=××=

××=

×=××=

××=


10/28

Ee+t&e CPI

•C"%!ut* the "era)) ee+t&e CPI &s $"#e 2y)""(* at the $&ere#t ty!es "- stru+t&"#s a#$the&r $&&$ua) +y+)e +"u#ts a#$ aera**

Oera)) ee+t&e CPI > Σ 6CPI& : IC&7& > 1

#

,here IC& &s the +"u#t 6!er+e#ta*e7 "- the #u%2er "-stru+t&"#s "- +)ass & e:e+ute$

CPI& &s the 6aera*e7 #u%2er "- +)"+( +y+)es !erstru+t&"# -"r that stru+t&"# +)ass

# &s the #u%2er "- stru+t&"# +)asses

The "era)) ee+t&e CPI ar&es 2y stru+t&"# %&: a %easure "- the $y#a%&+ -reue#+y "-stru+t&"#s a+r"ss "#e "r %a#y !r"*ra%s


11/28

Deter%ates "- CPU Per-"r%a#+e

CPU t&%e > I#stru+t&"#+"u#t : CPI :

+)"+(+y+)e Instuction !count

CPI clock!cycle

Al"oit#m

Po"ammin"lan"ua"e

Compile

I$A

Pocessoo"ani%ation

Tec#nolo"yX

XX

XX

X X

X

X


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A S&%!)e E:a%!)e

&p 'e( CPIi 'e( ) CPIi

A*U 50+ 1

*oa, 20+ 2

$toe 10+ 2

Banc# 20+ 2

&-eall eecti-e CPIΣ /

85

84

84

8

185

,hat !er+e#ta*e "- t&%e /e s!e#$ "#$&ere#t stru+t&"#s0 ALU > H

BRANC.>33H DATA TRANSFER >4H


13/28

Per-"r%a#+e ea)uat&"#

Pr"*ra%s t" test !er-"r%a#+e=

• !er-"r%a#+e 2est $eter%e$ 2yru##*

rea) a!!)&+at&"#s

• Use !r"*ra%s ty!&+a) "- e:!e+te$/"r( )"a$

"r ty!&+a) "- e:!e+te$ +)ass "-

a!!)&+at&"#s

C"%!uter 2e#+h%ar(s=

• Be#+h%ar(= !r"*ra%6s7 use$ t"

ea)uate +"%!uter !er-"r%a#+e


14/28

A L""( at DSP Be#+h%ar(s


15/28

A*e#$a

• ,hy /e #ee$ 2e#+h%ar(s

• ,hat %a(es u! a *""$ 2e#+h%ar(

• ,hat are s"%e +"%%"#)y use$ BAD2e#+h%ar(s

• Ch""s* the r&*ht 2e#+h%ar(

• Be#+h%ar(s use$ 2y the $ustry


16/28

,hy Be#+h%ar(s

• ,a#t t" see /h&+h !r"+ess"r &s 2etteru&+()y8 But 2etter /hat as!e+t0

• Be#+h%ar(s +a# 2e 2)e#$ "-a#yth* – Ra/ s!ee$

– P"/er +"#su%!t&"#

– Me%"ry usa*e

– C"st


17/28

,hat sh"u)$ a 2e#+h%ar(2e0

• Re!eata2)e

• Re)ea#t

• Fa&r• .ae +"%!ara2)e resu)ts


18/28

MIPSMOPS VER BAD

• M&))&"#s "- I#stru+t&"#O!erat&"#s !erse+"#$

• 1 MIPS +a# 2e s)"/er tha# 1MIPS – S"%e stru+t&"#s $" %"re /"r( tha#

"thers8

– E:8 L"a$* a 32&t +"#sta#t "# the J(ta(es stru+t&"#sK ;ust "#e "# theS.ARC


19/28

A!!)&+at&"#s N"t Great

• C"%%"#)y use$ -"r #"#DSP "r&e#te$!r"+ess"rs8 E:8 SPEC BTE%ar(

• VER +"%!&)er $e!e#$e#t8 May "r%ay #"t use aa&)a2)e -a#+y DSP-eatures

• Ee# &- &%!)e%e#te$ asse%2)y &ts

st&)) a test "- the !r"*ra%%er


20/28

A!!)&+at&"#s C"#t


21/28

,h&+h 2e#+h%ar( t"+h""se0

• Ar+h&te+ture $e!e#$e#+e

• Sh"u)$ !er-e+t)y ree+t /hat the DSP+h&! /&)) 2e use$ -"r

• Sh"u)$ 2)e#$ -a+t"rs su+h as +"st!"/er usa*e the !r"!"rt&"#s y"u+are a2"ut

It !r"2a2)y $"es#


22/28

Trust the !r"-ess&"#a)s

• Fa%"us )ast /"r$s= Lets trust the $ustry8

• ,hat


23/28

,hy $" they use BDTI%ar(0


24/28

,hat $"es BDTI%ar( test0


25/28

Be#+h%ar( resu)ts=


26/28

A!!)&+at&"# !r")*=


27/28

C"#+)us&"#s

• Be#+h%ar(s sh"u)$ 2e re!eata2)ere)ea#t -a&r a#$ rea$&)y+"%!ara2)e

• Be#+h%ar(s test a# a!!)&+at&"# that!r"2a2)y &s#


28/28

uest&"#s0

assessing and evaluting (3) (1)

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