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Partitioning the design.

gops
I know how to partition a design but I need to know about the purpose of partitioning the design. I have read that this helps in splitting the design among various layout engineers.But i don't understand how it's possible. By partitioning i think a hierarchical module i can assign the pin position and the cell density of the module . After partitioning how should i transfer the partitioned block to another layout engineer so that he could do the CTS, routing and optimization of the design? thanks gops.

  • The "savePartition" command creates a directory structure that enables the tool to be run on each hierarchical module you elect to specify as a partition.  For example, if you do a "savePartition -dir PTN" after completing the partitioning process, the structure will look like this (for the tutorial circuit shipped with the software):

    PTN/DTMF_CHIP <- This is the top level of the design with 2 partitions hardened
    PTN/results_conv <- This is a partition
    PTN/tdsp_core <- This is a partition

    Each of these directories will contain an FE .conf file that you can use to initialize the design.  Further, all of the data needed to perform block level implementation should be present:

    results_conv.conf
    results_conv.v
    results_conv.fp
    results_conv.fp.spr
    results_conv.place.gz
    results_conv.route.gz
    results_conv.constr.pt
    results_conv.constr.warn
    lib.defs
    results_conv.mode

    I've posted a 5-minute screencast on the subject of partitioning in general here:

    /blogs/di/archive/2008/11/06/demo-partitioning-a-design-in-soc-encounter.aspx?postID=12440

    Hope this helps,
    Bob

  • Hi Bob;

    Thanks for your reply. I understood about saving the partition.
     
    So i need to pass all these datas to another layout engineer so that  he could do the CTS,routing and optimization on the partition . Am i correct?
     
    Thanks N regards
    gops

  •  Your block designer could start work right in that directory, but if he/she prefers, the starting data can be copied to another work area. It's up to you!

  • Hi,Bob

    How can i get my desired core to boundary sapcing while partitioning.

    Here the tool adjusting the core spacing to some other value. 

      definePartition -hinst Partition_1 -coreSpacing 0.56 0.52 1.59 2.52
    Creating partition Partition_1

    **WARN: (ENCPTN-426):    Adjusting partition Partition_1 core to left from 0.560000 to 0.795000.
    **WARN: (ENCPTN-427):    Adjusting partition Partition_1 core to right from 0.520000 to 0.565000.
    **WARN: (ENCPTN-428):    Adjusting partition Partition_1 core to top from 1.590000 to 3.255000.
    **WARN: (ENCPTN-429):    Adjusting partition Partition_1 core to bottom from 2.520000 to 3.375000.

     

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