Bottleneck At Heaven's Gates (Part Five)

[August Highland]

Bottleneck At Heaven's Gates (Part Five)


app lica tion (a cal cul ato r) 
eO f to day 
s m icro pro ces sor s 
k9 5% go int o e mb edd 
ed app 
lica tion s 
"S SH 3/4 (H itac 
hi): be st s 
elli ng RIS 
C m 
icro pro ces sor 
k5 0% of mic 
rop roc ess or rev 
enu 
e s tem 
s fr om em 
bed ded 
sys tem s 
eO ften foc use d o n p art icu 
lar app 
lica tion are a 
kM icro con tro ller 
s 
kD SP s 
kM edi a P roc ess ors 
kG rap hic s P roc ess ors 
kN etw ork an d C 
om mu nic atio 
n P roc ess ors 
F00 15 
CS /EE 
58 10 
CS /EE 
68 10 
Mea sure men t To ols 
eH ard wa re: Co 
st, del ay, are 
a, p ow er e 
stim 
atio n 
eB enc hm ark s, T 
rac es, Mi xes 
eS imu 
lati on (m any 
le vel s) 
kI SA , R T, G 
ate , C ircu 
it 
eQ ueu ing Th eor y 
eR ule s o f Th 
um b 
eF und 
am ent al " Law 
s"/ Pri nci ple s 
F00 16 
CS /EE 
58 10 
CS /EE 
68 10 
Rev iew : 
Per form 
anc e, C ost, Pow 
er 
F00 17 
CS /EE 
58 10 
CS /EE 
68 10 
Met ric 1 
: Pe rfor man 
ce 
*T ime 
to run the tas k 
-E xec utio n ti me , re spo 
nse tim e, l ate ncy 
*T ask s p er d 
ay, ho ur, we ek, se c, n 
s ... 
-T hro ugh 
put , ba ndw 
idth 
Pla ne 
Bo ein g 7 47 
Co nco 
rde 
Sp eed 
610 mp h 
135 0 m ph 
DC to Par is 
6.5 ho urs 
3 h our s 
Pas sen ger s 
470 132 
Thr oug 
hpu t 
286 ,70 0 
178 ,20 0 
In p ass eng er-m 
ile/ hou 
r 
F00 18 
CS /EE 
58 10 
CS /EE 
68 10 
Mea suri ng P 
erfo rma nce 
e2 ke y a spe 
cts 
kE xec utio n ti me 
kT hro ugh 
put 
kM aki ng one 
fas ter ma 
y s low 
the oth er 
eC om par ing pe rfo rm anc 
e 
kp erf orm 
anc e = 1/e 
xec utio n ti me 
kI f X is n ti me s fa 
ste r th 
an Y 
kI mp 
rov ed per for ma nce 
== > d ecr eas ing XE Q t ime 
Exe cut ion tim 
e Y 
Exe cut ion tim 
e X 
= N 
Pag e 4 
F00 19 
CS /EE 
58 10 
CS /EE 
68 10 
Mea suri ng P 
erfo rma nce 
Go od ide a, b 
ut w 
hat do we co unt ? 
eS eve ral kin ds of " 
tim e" 
kS top wa tch 
tim 
e - it's wh 
at t he use 
r ca res ab out , bu 
t is 
dep end ent on 
"L oad , I/O de lay s, O 
S o ver hea 
d 
kC PU tim 
e - tim e s pen 
t co mp utin 
g y our 
pro 
gra m 
"F act ors ou t tim 
e s pen 
t w aiti ng for I/O 
de lay s 
"B ut, inc lud es the OS 
+ y our pr ogr 
am 
kH enc e s yst em CP 
U t ime 
an d u ser CP 
U t ime 
F00 20 
CS /EE 
58 10 
CS /EE 
68 10 
OS Tim e 
eU nix "ti me " c om 
ma nd rep ort s 
ku ser CP 
U t ime 
ks yst em CP 
U t ime 
kt ota 
l el aps 
ed tim e 
k% of ela pse 
d ti me tha 
t is us er + 
sy ste m C 
PU tim 
e 
"T ells ho w m 
uch tim e y ou spe 
nt w 
aiti ng 
eB ew are ! 
kO S's ha ve a w 
ay of u 


august highland

muse apprentice guild
--"expanding the canon into the 21st century"
www.muse-apprentice-guild.com

culture animal
--"following in the footsteps of tradition"
www.cultureanimal.com












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