2. All down mode Analysis
Compared with all down rates ,unknown down is the top one .
All downmode analsys in Aug,2002 .
13 Unstable 14 Handler Unstable 2 No record of down
18 ACS Down
14% 1% Unknown down
0%
16%
11 Change Type
5%
3 Standby
10 Other 7%
8%
8 Handler Down 4 Calibration
5% 9%
7 Type當
13% 5 工Engineering
6 系統當
11% 11%
3. Compared with standby time
1.Unknow down occupy 34% of standby time.
2.Small down occupy 27% of standby time.
. Standby Time Status in Aug, 2002
Others Idle
Handler/Prob
10% 7%
er Cal./PM
0% Small down
27%
Unknown
down
34% Handler/ Type down
Prober down 16%
6%
4. Small down Happen
1.It happen when production stop over 2
minutes.
2.Each problem happened will casue small
stop first, why ?
System down
Handler down
ACS
Small
stop
Unknown
stop ? Type down
t
When do you found problem ? or
5. Small down v.s Others
The relativity of top six down modes .
Unknow down 34% System Down
Small down 27%
Handler
TypeDown 16% down
Other &
Idle 7%
6. Type Down Analysis
OneC 4058XH have more problem with Fusion.
VP40584 OM635X
6% 15%
PCD80XXH
13%
VP40581
35%
PCF50601
1%
VP40554 PCF50872
2% VP22344 9%
PCF87750
5%
14%
7. System Down
Hardware fail :
PECHF,FARMNT,DPS,PSCM…
Hang problem.
Hardware hang, bad die hang &
software hang …
8. System Down Analysis
System Down in Aug, 2002
Power
75% Casued by printer
without paper ,and summary out Cut
wait for processing 22% 2%
(hang). Compared with
system down.
Tester Hang
Teste down
64%
11%
Vaccum Source
1%
9. Handler Down
TESEC handlers loader have more problem 38% in Aug.
Handler down in Aug,2002
Peripheral problem Socket problem
ofhandler 0%
4%
Index abnormal Pin bend problem
20% 6%
Handler temperature
problem
7%
Loader problem
Handler test area 38%
Unloader problem
problem
19%
6%
10. Unknown Down
Unknow down occupy 34% of
standby time in ACS.
Why we don’t know it down ?
No one found it .
No down happened .
or Other …
11. Cause Analysis & Team members
Small Stop
UnknowStop Unknow Stop Unknow Stop
from handler from Type from System
OneC have more 40%
Handler down 5% System down have 11%
Of type down 13%:
And Unstable 1% 40581H occupy 35% of all down mode:
Loader problem occupy (40575 WT) Hang have 64 % of
38% of all handler 40584 6% system down.
problem Om635X 15%
J.R Wang Peace Lin C.S Tu
12. Hang problem
Production hang .
Double dataviewers casue test time longer.
(Need support from System,C.S.Tu and Vendor)
MS_Dlog could not worte (OneC DC log).
(Need support from CSTD, Peace.Lin & BL)
Fail die casue hang (OneC).
(Need support from CSTD. Peace.Lin & BL)
Hardware hang .
Load board casued it hung when failed TXD1.
(Need support from CSTD. Peace.Lin )
Hardware configuration miss.
(Need support from System,C.S.Tu and Vendor)
13. Secondary dataviewers problem
Why Fusion processes have two dataviewers?
1. Normally only one work with optool , but when test
program was unloaded , it still exited .Next launcher
command be run , a new dataviewer will popup.
2. It casue test time longer than default for all types.
For example :
OneC > 1.5 times
(normally dual sites 8.5sec ,become 12.8sec , but not always)
3. It influence output .
4. A bug of OS.
15. How serious is it ?
• FTF would have more problems than WTF, because it happened
when one exit optool after unload TP .
Users Happen Times
WeekUser Prod Envdiag Preprod Pre_vlsi Str Vlsi Pre_3gsm Others
Week227 27 4 3 1 3 1 2 2
Week228 32 7 5 0 2 0 1 1
Week229 20 5 2 0 5 1 1 0
Week230 25 1 3 0 1 1 1 1
July,2002 total
104 17 13 1 11 3 5 4
These with records!!!
16. The result after using pkill before
Short-term solution :
Pload
a .Kill the process before next optool popup automatically .
b. Two dataviewer prevention process was execute in Aug,2002 week 231.
Long-term solution :
Vendor’s SPR and improvement of OS are necessary.
Week User Prod Envdiag Preprod Pre_vlsi Str Vlsi Pre_3gsm
* Week231(Aug/1 ) 9 1 2 0 1 0 1
Week232 6 1 1 0 0 0 0
Week233 4 0 2 0 0 0 1
Week234 0 0 1 0 0 0 0
Week235 0 1 1 0 0 0 0
J uly to ta l 19 3 7 0 1 0 2
17. Improvement result and Target
• Compared to with pkill and without pkill.
Dataviewer casue long test time
120
104
100
Secondary
80
Dataviewer
happen 60
Times
40
19 17
13 11
20 3
7
3 5 2 4 2
1 0 1 0
0
Prod Envdiag Preprod Pre_vlsi Str Vlsi Pre_3gsm Others
No Pkill 104 17 13 1 11 3 5 4
Pkill 19 3 7 0 1 0 2 2
User account
• Finally target is no secondary dataviewer found .
