Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
MIPS Calculation

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM
View previous topic :: :: View next topic  
Author Message
Senthil81

New User


Joined: 13 Jan 2009
Posts: 4
Location: India

PostPosted: Mon Aug 10, 2009 1:36 pm    Post subject: MIPS Calculation
Reply with quote

Hi,

Could you please give me the formula to calculate MIPS if i have Elapsed Time and CPU Time. One of my friend gave me the formual as

491*(CPU Time/(Elapsed Time*3))

Is that correct ?
Back to top
View user's profile Send private message

expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Mon Aug 10, 2009 1:39 pm    Post subject:
Reply with quote

MIPS are a measure of the processing power of a CPU. The number of MIPS is dependant on the CPU installed. Please ask one of your sysprogs or capacity / performance people for this site specific information.

However, if this is not what you want, please ask clearly.
Back to top
View user's profile Send private message
enrico-sorichetti

Global Moderator


Joined: 14 Mar 2007
Posts: 10310
Location: italy

PostPosted: Mon Aug 10, 2009 1:49 pm    Post subject: Reply to: MIPS Calculation
Reply with quote

Quote:
Is that correct ?
NO
the most stupid formula ever seen around any IT related ... paper, conversation, question, answer, thingy

but maybe Your friend was just pulling Your leg icon_biggrin.gif
Back to top
View user's profile Send private message
Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8154
Location: East Dubuque, Illinois, USA

PostPosted: Mon Aug 10, 2009 5:08 pm    Post subject:
Reply with quote

Quote:
One of my friend gave me the formual as

491*(CPU Time/(Elapsed Time*3))

Is that correct ?
Since you don't provide us with any details such as the machine you're running on, the model number of the machine, whether or not the LPAR is capped, whether or not your job is running while the LPAR is capped, we could not possibly provide a yes answer. However, since MIPS was an IBM measurement (no longer supported by IBM, by the way) of the entire processing workload (including I/O to disk, I/O to tape, channel usage, memory usage, paging, cycle consumption, and so forth) of a machine and was absolutely never applied to individual jobs, we can categorically state that your formula is wrong. There is no way to calculate a MIPS number for an individual job, period. It is wrong to talk about MIPS for a job.

Research on IBM's web sites the concept of MSU and learn to use it.
Back to top
View user's profile Send private message
Bill Dennis

Active Member


Joined: 17 Aug 2007
Posts: 562
Location: Iowa, USA

PostPosted: Mon Aug 10, 2009 8:38 pm    Post subject:
Reply with quote

Service Units per job is another measurement. Each processor type and capacity has a "Services Units per second" value. Multiply the SU/sec value times the CPU seconds used by the job to get the total SUs.

Faster processors have a larger SU/sec value so jobs ending more quickly have a similar total SUs number to the same job on a slower CPU. This gives a rough comparison of workloads on various machines, assuming the resources (CPU, I/O and memory) are weighted the same on each machine.
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts MIPS/CPU consumption reduction in Batch vishwakotin DFSORT/ICETOOL 4 Sat Mar 18, 2017 5:46 pm
This topic is locked: you cannot edit posts or make replies. MIPS reduction for Batch job Virendra Shambharkar All Other Mainframe Topics 8 Mon Nov 07, 2016 4:02 pm
No new posts MSU calculation for DB2 (to decide be... SRICOBSAS DB2 4 Wed Mar 23, 2016 6:07 pm
No new posts Need training ppt for DB2 v10 MSU / M... SRICOBSAS DB2 5 Tue Mar 15, 2016 10:30 pm
No new posts Time difference calculation Ramsee COBOL Programming 8 Wed Dec 10, 2014 3:15 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us