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Questions about OCEAN XL

jorankin

Stacy,

    Hello. I am writing with regards to OceanXL. I, too, am having trouble using OceanXL to do what I have been able to do previously with Ocean. My two issues are below:

 1. I would like to have OceanXL output only certain outputs (such as those I have specified in ADE or ADEXL, like gain, bandwidth, etc) in tabular format using something like fprintf or the like. It doesn't seem to work the same way I have tried in the regular OCEAN since I am running distributed sims.

 

2. I would also like to run OCEANXL in distributed mode AND run it in the background without it holding down my cadence session. In the past, I have run OCEAN using the icsub command, but this precludes me running distributed sims. I would like to run OCEANXL using the icsub command AND have it use my distributed simulation settings specified in my OCEANXL script.

      Of course, I can run distributed sims in ADEXL which works. But when I run enough sims in parallel, my cadence session gets tied down and I can't do anything else. This is undesirable. My productivity goes down 10x!

     The above issues are not spelled out at all in the OCEANXL reference provided to designers. Do you have suggestions for a better reference and/or how to fix the problems?

 

Thanks,

John

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  • Andrew Beckett

    John,

    I split this post into a new topic, because it's bad practice to tack onto an existing thread (which is really rather different). I am hoping to get some forum guidelines up at some point to make it clear what the "rules" are for the forum. Anyway, never mind - it's split off now.

    OCEAN XL can quite happily output only certain outputs - you control that via the ocnxlOutputExpr function. If however you want to have something where you post-process all the results afterwards and format the data in the specific way you want, there are a couple of possible approaches:

    1. Use the axlWriteDatasheet function - see solution http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11609060 . This outputs XML for all the scalar data you've captured, and then you could use a program to pull out whatever info you want from the XML. 
    2. Wait for IC615 where there will be a new public function to access the "RDB" (the Results Database) which is where all the scalar results get stored. Right now there's only a private interface to this (and it's not very easy to use because it wasn't designed with external users in mind).

    For point 2, "icsub" is not a Cadence command - it's presumably something in your environment to submit to a queuing system. I'm not sure why you can't distribute from there. For example, in my office I have LSF set up, and I can use "bsub" to submit my virtuoso or ocean session, and then run an OCEAN or OCEAN XL script which further distributes the jobs. So icsub won't be in the documentation because it is nothing to do with Cadence. From a quick search, it seems to be a command used at one particular company (headquartered in Milpitas?) - if so, I used to work for them (albeit nearly 20 years ago now) ;-)

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    John,

    I split this post into a new topic, because it's bad practice to tack onto an existing thread (which is really rather different). I am hoping to get some forum guidelines up at some point to make it clear what the "rules" are for the forum. Anyway, never mind - it's split off now.

    OCEAN XL can quite happily output only certain outputs - you control that via the ocnxlOutputExpr function. If however you want to have something where you post-process all the results afterwards and format the data in the specific way you want, there are a couple of possible approaches:

    1. Use the axlWriteDatasheet function - see solution http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11609060 . This outputs XML for all the scalar data you've captured, and then you could use a program to pull out whatever info you want from the XML. 
    2. Wait for IC615 where there will be a new public function to access the "RDB" (the Results Database) which is where all the scalar results get stored. Right now there's only a private interface to this (and it's not very easy to use because it wasn't designed with external users in mind).

    For point 2, "icsub" is not a Cadence command - it's presumably something in your environment to submit to a queuing system. I'm not sure why you can't distribute from there. For example, in my office I have LSF set up, and I can use "bsub" to submit my virtuoso or ocean session, and then run an OCEAN or OCEAN XL script which further distributes the jobs. So icsub won't be in the documentation because it is nothing to do with Cadence. From a quick search, it seems to be a command used at one particular company (headquartered in Milpitas?) - if so, I used to work for them (albeit nearly 20 years ago now) ;-)

    Regards,

    Andrew.

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