Performance analysis on interposed functions

Hi,
This is a repost of http://forum.java.sun.com/thread.jspa?threadID=5156578 mistakenly posted in Sun Studio C++ forum.
I'm using the example code given in the following article (and the Linker and Library Guide) to define my own time function as a shared library:
http://developers.sun.com/solaris/articles/time_stamp.html
This works properly. Now I wish to analyze performance of a program using this library using collect and analyzer. Two problems arise:
1. The #pragma init does not seem to work. I have to put a static flag variable and call the init_func myself inside my time() function if the flag is not set.
2. Even after doing this, the dlsym() call returns an error indicating the original time() function could not be found.
Is performance analysis of such interposed functions possible ? The test code only has a bunch of time() calls.
If this can work, I plan to use it to analyze some code (including some third party libraries) that needs the current time to be set to a fixed value in order to ensure identical results.
I'm using Sun Studio 10 on Solaris 8.
Regards,
Paul

Sorry for a delayed response.
I'm not sure if this constitutes a bug in the dynamic linker. Please try setting LD_PRELOAD environment variable instead of LD_FLAGS. It appears that setting both (collect sets LD_PRELOAD) confuses the dynamic linker and only one setting takes effect.
-- Oleg

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I want some "Performance Analysis Notes or material"..
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Hi, this may help you.
1) Dont use nested select statements
2) If possible use for all entries in addition
3) In the where addition make sure you give all the primary key
4) Use Index for the selection criteria.
5) You can also use inner joins
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https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5d0db4c9-0e01-0010-b68f-9b1408d5f234
ABAP performance depends upon various factors and in devicded in three parts:
1. Database
2. ABAP
3. System
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Avoid for all entries in JOINS
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Try to restrict the joins to 1 level only ie only for tables
Avoid using Select *.
Avoid having multiple Selects from the same table in the same object.
Try to minimize the number of variables to save memory.
The sequence of fields in 'where clause' must be as per primary/secondary index ( if any)
Avoid creation of index as far as possible
Avoid operators like <>, > , < & like % in where clause conditions
Avoid select/select single statements in loops.
Try to use 'binary search' in READ internal table. Ensure table is sorted before using BINARY SEARCH.
Avoid using aggregate functions (SUM, MAX etc) in selects ( GROUP BY , HAVING,)
Avoid using ORDER BY in selects
Avoid Nested Selects
Avoid Nested Loops of Internal Tables
Try to use FIELD SYMBOLS.
Try to avoid into Corresponding Fields of
Avoid using Select Distinct, Use DELETE ADJACENT
Check the following Links
Re: performance tuning
Re: Performance tuning of program
http://www.sapgenie.com/abap/performance.htm
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
check the below link
http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm
See the following link if it's any help:
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
Check also http://service.sap.com/performance
and
books like
http://www.sap-press.com/product.cfm?account=&product=H951
http://www.sap-press.com/product.cfm?account=&product=H973
http://www.sap-img.com/abap/more-than-100-abap-interview-faqs.htm
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
Performance tuning for Data Selection Statement
http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm
Debugger
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
http://www.cba.nau.edu/haney-j/CIS497/Assignments/Debugging.doc
http://help.sap.com/saphelp_erp2005/helpdata/en/b3/d322540c3beb4ba53795784eebb680/frameset.htm
Run Time Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617cafe68c11d2b2ab080009b43351/content.htm
SQL trace
http://help.sap.com/saphelp_47x200/helpdata/en/d1/801f7c454211d189710000e8322d00/content.htm
CATT - Computer Aided Testing Too
http://help.sap.com/saphelp_47x200/helpdata/en/b3/410b37233f7c6fe10000009b38f936/frameset.htm
Test Workbench
http://help.sap.com/saphelp_47x200/helpdata/en/a8/157235d0fa8742e10000009b38f889/frameset.htm
Coverage Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c7/af9a79061a11d4b3d4080009b43351/content.htm
Runtime Monitor
http://help.sap.com/saphelp_47x200/helpdata/en/b5/fa121cc15911d5993d00508b6b8b11/content.htm
Memory Inspector
http://help.sap.com/saphelp_47x200/helpdata/en/a2/e5fc84cc87964cb2c29f584152d74e/content.htm
ECATT - Extended Computer Aided testing tool.
http://help.sap.com/saphelp_47x200/helpdata/en/20/e81c3b84e65e7be10000000a11402f/frameset.htm
Just refer to these links...
performance
Performance
Performance Guide
performance issues...
Performance Tuning
Performance issues
performance tuning
performance tuning
You can go to the transaction SE30 to have the runtime analysis of your program.Also try the transaction SCI , which is SAP Code Inspector.
1 Always check the driver internal tables is not empty, while using FOR ALL ENTRIES
2 Avoid for all entries in JOINS
3 Try to avoid joins and use FOR ALL ENTRIES.
4 Try to restrict the joins to 1 level only ie only for 2 tables
5 Avoid using Select *.
6 Avoid having multiple Selects from the same table in the same object.
7 Try to minimize the number of variables to save memory.
8 The sequence of fields in 'where clause' must be as per primary/secondary index ( if any)
9 Avoid creation of index as far as possible
10 Avoid operators like <>, > , < & like % in where clause conditions
11 Avoid select/select single statements in loops.
12 Try to use 'binary search' in READ internal table. Ensure table is sorted before using BINARY SEARCH.
13 Avoid using aggregate functions (SUM, MAX etc) in selects ( GROUP BY , HAVING,)
14 Avoid using ORDER BY in selects
15 Avoid Nested Selects
16 Avoid Nested Loops of Internal Tables
17 Try to use FIELD SYMBOLS.
18 Try to avoid into Corresponding Fields of
19 Avoid using Select Distinct, Use DELETE ADJACENT.
Regards
Madhu

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72-78, Grande Rue, F-92310 SEVRES
phone : +33 1 41 14 86 42 (direct) +33 1 41 14 85 00 (reception desk)
fax : +33 1 41 14 85 99

Hello,
It would be good if one could do some performance analysis and monitoring of
a Forte application at production time.
By performance analysis I mean measure the time some selected methods take
to return. In a CS application such a method would be some selected method
of a key remote service representative of the application's activity.
One would like to mesure the min, max, average time, and also give a
threshhold which when reached will automatically generate an alarm or some
pre-defined processing.
The most powerful way would be to use a SNMP application through a Forte -
SNMP gateway. (see the G. Puterbaugh paper "Building a Forte-SNMP gateway"
in the 96' Forte Forum proceedings).
But before going that far some simple means accessible through EConsole
would already be great.
A collegue of mine when to that Forum and reported that Puterbaugh said that
such an agent is currently missing, but that its implementation is not
difficult.
I looked at all the agents and their instruments. I came to the following
conclusions :
1) instrumented data are available at the granularity level of a partition,
not at a smaller granularity. For example, the DistObjectMgr agent gives you
very useful information : the number of events (sent/received) and the
number of (remote) methods (called/invoked), but this for the entire
partition. Thus it prevents making tuned observations (unless you partition
in a special way your application to put in a dedicated partition the thing
you want to observe and only this thing).
2) there is no instrumented data related to processing time.
This leads me to the point that no information observed by the standard
agents help me figuring out my performances. Thus I have to add at
development time some lines of code to the methods I potentially want to
observe later at production time to generate the appropriate information a
custom agent will then display (process) with the appropriate instruments.
Does someone share this position ?
Has someone implemented such an agent and assotiated means ?
PS: I will probably implement my own one if no other way around.
best regards,
Pierre Gelli
ADP GSI
Payroll and Human Resources Management
72-78, Grande Rue, F-92310 SEVRES
phone : +33 1 41 14 86 42 (direct) +33 1 41 14 85 00 (reception desk)
fax : +33 1 41 14 85 99

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OK.
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i5-3210M(2.5Ghz), 6GB RAM, 750GB 5400rpm HD, 15.6in 1366x768 LCD, Intel HD Graphics, 802.11bgn wireless, 1Gb Ethernet, UltraNav, Fingerprint reader, Camera, 6c Li-Ion, Win7 Home Premium 64
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SQL statements consuming significant database time were found.
======
While clicking on above link system opens another page and it should following details.
Action Run SQL Tuning Advisor on the SQL statement with SQL_ID "5z50bh2wj1svt".
SQL Text SELECT /*+FIRST_ROWS INDEX(a ttdpur041730$idx4)*/ a.t$amta,a.t$bqua,a.t$btsp,a.t...
SQL ID 5z50bh2wj1svt
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SSM

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I take it the path includes the correct <oracle_home>\bin
sqlplus / as sysdba
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Sorry, I can't explain the backup issue.
Eric

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All the application binaries were running fine.
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Solaris 8 - tux8 environment.
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I5_RQMG_0002_00
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Hi,
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