On Mar 19, 2012, at 3:35 PM, Alex Margolin wrote:
> I've removed put and get from mosix (feels good to cut down on code
> lines...), but now the question has to be asked:
> Threre are send and sendi (is sendi sufficient, or must i include send as
> well?)
send is sufficient. sendi is an optimization. You can always implement it
later, after you get base functionality working.
> for the outgoing, but what about the incoming?
> How does a process request input? Do I poll for incoming messages in the
> progress function and call the function in
> mca_btl_base_active_message_trigger[incoming_tag] ?
Yes.
> Also, If I remove the async operations and left only with the blocking ones -
> can I remove the prepare_src/prepare_dst functions (and any other mention of
> the descriptors data structure) for the time being?
Here's notes I have from a conversation I had with George when I was preparing
a custom BTL for an Sc'11 demo:
/*
* Notes from george:
*
* - BTL ALLOC: allocating PML control messages or eager frags if BTL
does not have IN_PLACE flag. To be clear: max it will ever alloc
is eager_limit. THEREFORE: eager_limit is the max that ALLOC
must always be able to alloc.
--> Contraction in the btl.h documentation.
*
* - BTL PREPARE SRC: max_send_size frags go through here. Can return
a smaller size than was asked for.
*
* - BTL PREPARE DEST: not used if you don't have PUT/GET
*
* - BTL SEND: will be used after ALLOC / PREPARE
*/
> I assume it'll cost me in performance, but I want to create a basic working
> prototype first and proceed to supporting async calls later on.
>
> Thanks for all your help,
> Alex
>
> P.S. Sorry about the lengthy thread... I promise I'll document my component
> so it can later be used for reference for the things I didn't understand
> reading the template, btl.h and the TCP component (any other devel manuals to
> read?).
No worries; we're happy to answer questions.
Any documentation you can provide would be awesome. :-) As you can see, we're
a little short of real developer documentation. :-(
--
Jeff Squyres
[email protected]
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