Charm++ parallel programming system

[Phil Miller <mille121 AT illinois.edu>]

On Wed, Jan 19, 2011 at 08:09, Xuehan Xu 
<xxhdx1985126 AT gmail.com>
 wrote:
>      I built the charm++ with the "version" set to "net-linux". It seemed
> that the charmrun.c file always includes the converse.h which in turn
> includes src/arch/net-linux/conv-mach.h, in which the macro
> CMK_SHARED_VARS_UNAVAILABLE is always defined as 1. Dose this mean that the
> shared variables are always not available when I run "./build charm++
> net-linux"?
>      I've also review several conv-mach.h files in other directory, such as
> src/arch/mpi-linux/conv-mach.h, they define CMK_SHARED_VARS_UNAVAILABLE as
> 1, too. Which version should I choose to use shared variables?

This is mostly a runtime implementation detail. What are you actually
trying to accomplish?

> On 19 January 2011 00:31, Phil Miller 
> <mille121 AT illinois.edu>
>  wrote:
>>
>> It means there won't be multiple PEs sharing virtual address space as
>> multiple threads in a common process. In other words, shared variables
>> are available on SMP and multicore builds of Charm, but not the
>> versions that fork a separate process per PE.
>>
>> On Tue, Jan 18, 2011 at 10:12, Xuehan Xu 
>> <xxhdx1985126 AT gmail.com>
>>  wrote:
>> > Dear sirs:
>> >         I've been reviewing charm source code in the past few days, and
>> > I
>> > discovered "CMK_SHARED_VARS_UNAVAILABLE" is defined, then the field
>> > "cpus"
>> > of every element of the "nodetab_table" can only be 1, why is that? What
>> > does the macro "CMK_SHARED_VARS_UNAVAILABLE" mean?
>> >
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>> >
>> >
>
>
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