Bottleneck At Heaven's Gates (Part One)

[August Highland]

Bottleneck At Heaven's Gates (Part One)



Bot tlen eck s in MP 
I Pr ogr am s 
Mic hae l G ern 
dt 
De fini tion 
s 
EX EC T(r ,p) 
Exe cut ion tim 
e o f re gio n r at p 
roc ess 
or p 
EX EC T(r ) 
a*p )p, r( 
EXECT 
IOT (...) 
Exe cut ion tim 
e o f IO 
op era tion 
s 
SY NC T(.. .) 
Exe cut ion tim 
e o f ba 
rrie r sy 
nch ron iza tion 
MP T(.. .) 
Exe cut ion tim 
e o f M ess 
age pa ssin 
g ro utin es (ex cep 
t 
bar rier ) 
FR EQ (...) 
Nu mb er o 
f ex ecu tion s o f th at r egi on 
MS GL EN GT H(. ..) 
Siz e o f da 
ta s ent in tha t re gio n 
IDL ET (...) 
Idle tim e, i .e. tim e w 
ast ed wh ile wa itin g fo 
r a 
com mu nic atio 
n p artn 
er. 
Re gio n 
pro gra m u 
nit, loo 
p n est s, c 
all site 
Exc ess ive co sts (R egi on r) 
De scr 
ipti on 
*It ide 
ntif ies wh 
eth er a 
ny per form 
anc e p rob lem 
ex ists 
in tha t re gio n. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-E XE CT (r), IO T(r ), M 
PT (r), SY 
NC T(r ) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-E XE CT (r)/ (IO T(r )+M 
PT (r)+ 
SY NC T(r )) > 
thr esh 
old 
Exc ess ive co mm 
uni cat ion (R egi on r) 
De scr 
ipti on 
*T he exe 
cut ion tim 
e o f th at r egi on is d 
om ina ted by me 
ssa ge pas 
sin g. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-E XE CT (MA 
IN) , M PT (r) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-M PT (r)/ EX EC T(M 
AIN ) > thre 
sho ld 
Exc ess ive ba rrie r sy 
nch ron iza tion 
(R egi on r) 
De scr 
ipti on 
*T he exe 
cut ion tim 
e fo r a bar rier ca ll si te i s s ign ifica 
nt. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-E XE CT (MA 
IN) , SY 
NC T(r ) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-S YN CT (r)/ EX EC T(M 
AIN ) > thre 
sho ld 
Un eve 
n w ork dis 
trib utio 
n (R 
egi on r) 
De scr 
ipti on 
*T he am oun 
t of tim 
e s pen 
t in us efu l wo 
rk i s d iffe ren t in the 
pro ces sor s. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
- "p: EX 
EC T(r ,p), 
IO T(r ,p), 
MP 
T(r ,p), 
SY 
NC T(r ,p) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-s tde v( { EX EC T(r ,p)- 
IOT 
(r,p )-M PT (r,p 
)-S YN CT (r,p 
)|pI^ 
P}) > t hre sho 
ld 
Exc ess ive nu mb er o 
f ca lls ( Re gio n r) 
De scr 
ipti on 
*T he exc 
ess ive ex ecu 
tion tim e o f th e M 
PI c all site 
r re 
sul ts f rom 
a h igh nu mb er 
of c alls . Th 
e c om mu nic atio 
n ti me pe r ca 
ll is typ 
ica l. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-E XE CT (r), FR 
EQ (r), MS 
GL EN GT H(r ) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-E XE CT (r)/ FR EQ (r)z. Ty pic alT ime 
(MS 
GL EN GT H(r )/FR 
EQ (r)) 
Co mm 
uni cat ion of big me 
ssa ges (R egi on r) 
De scr 
ipti on 
*E xte nsi ve com 
mu nic atio 
n c ost s re 
sul t fro 
m b ig m 
ess age s. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-F RE Q(r ), M 
SG LEN 
GT H(r ) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-M SG LEN 
GT H(r )/FR 
EQ (r) > th 
res hol d 
late se nde 
r (R egi on r) 
De scr 
ipti on 
*T he idle 
tim e fo r th e p ass 
ed rec eiv e o per atio 
n r is s ign ifica 
nt. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-F RE Q(r ), ID 
LET (r) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-I DL ET (r)/ FR EQ (r) > th 
res hol d 
late rec eiv er ( 
Re gio n r) 
De scr 
ipti on 
*T he idle 
tim e fo r se nd ope 
rati on r is sig 
nifi can 
t. 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
-F RE Q(r ), ID 
LET (r) 
*R equ ired sta tic info 
rma tion 
*C ond itio ns for this bo ttle nec 
k to oc cur 
-I DL ET (r)/ FR EQ (r) > th 
res hol d 
une ven MP 
dis trib utio 
n (R 
egi on r) 
De scr 
ipti on 
*T he com 
mu nic atio 
n ti me for ca ll si te r is diff ere nt i n th 
e p roc ess 
ors . 
Pro of *Re 
qui red dy nam 
i'c i nfo rma 
tion 
- "p EX 



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










---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.505 / Virus Database: 302 - Release Date: 7/30/2003