[ExM Users] Generating Blobs in Swift/T

[Tim Armstrong]

I just wanted to add that if you built the release from source you can
safely comment out the offending line (line 2178 of tcl-adlb.c, I believe,
if you are using the exm-0.5.0 release).  As Justin said, this made it into
the release on accident and doesn't have any useful purpose.

Regards,
Tim


On Mon, Jul 14, 2014 at 4:05 PM, Justin M Wozniak <wozniak at mcs.anl.gov>
wrote:

>  Hi
>
> Sorry- that message is a debugging line that unfortunately made it into
> the release.  It is already removed from our trunk and will not be in the
> next release- you can just remove it from your source.
>
> I will fix the blob doc issue now but feel free to post any additional
> questions here in the meantime...
>
>     Justin
>
>
> On 07/14/2014 03:52 PM, Knight, Samuel wrote:
>
> Hello,
>
>  I am writing a program in Swift/T that generates blob objects inside a
> leaf function. Binary data is generated with a Swig-wrapped C function, and
> the blob construct is produced by making a list out of the pointer and
> length in the Tcl wrapper.
>
>  Here is a sample from my Tcl script:
>
>  proc c_initVect { s o } {
> set len [ expr $s * [blobutils_sizeof_int32] ]
>         set ptr [ blobutils_malloc $len ]
>         initVect [blobutils_cast_to_int_ptr $ptr] $s $o # C leaf function
>
>          return [ list [ blobutils_cast_to_int  $ptr] $len ] # creating
> the blob
> }
>
>  When I run the program with this snippet, my output fills with
> 'uncache_blob' messages.
>
>  Here is an example:
> uncache_blob: 67376368 4000 3uncache_blob: 67380384 4000 4
> Which is the output from a program that generates 2 blobs with the
> function above.
>
>  The output is automatically generated by the runtime, and I have no
> control over when blobs are uncached.
>
>  I've traced that output to ADLB_Local_Blob_Free_Cmd function
> in src/tcl/adlb/tcl-adlb.c
>
>  For programs that allocate a large number of blobs, the output from the
> runtime becomes overwhelming, and I am starting to think my snippet is
> generating blobs incorrectly. So far, the only example I can find that
> generates blobs that are returned to Swift/T is a the fortran example from
> the leaf functions guide (Section 3.4
> www.mcs.anl.gov/exm/local/guides/leaf.html). There is a promising link in
> Section 3.3.3 of the leaf guide that explains blobs, but when I click on it
> I get a 403 error.
>
>  Is anyone aware of additional examples or tutorials that explain how to
> generate and manage blobs in Swift/T.
>
>  Thank you,
> Samuel Knight
>
>
> _______________________________________________
> ExM-user mailing listExM-user at lists.mcs.anl.govhttps://lists.mcs.anl.gov/mailman/listinfo/exm-user
>
>
> --
> Justin M Wozniak
>
>
> _______________________________________________
> ExM-user mailing list
> ExM-user at lists.mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/exm-user
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/exm-user/attachments/20140714/e0ae3005/attachment-0001.html>