Re: [Starpu-devel] BCSR: the rowptr field.

[Cyril Roelandt <cyril.roelandt@inria.fr>]

On 06/08/2012 03:38 AM, Samuel Thibault wrote:
> Cyril Roelandt, le Fri 08 Jun 2012 03:08:38 +0200, a écrit :
>> I think colind should be [0, 0, 2], since the first two blocks start at
>> column 0, and the lower right block starts at column 2.
> 
> I believe that would rather be [0, 0, 1], i.e. in blocks.
> 
>> But I'm not sure of what should be put in the rowptr field. Does anyone
>> master the BCSR format ?
> 
> rowptr is the index (inside the nnzval array) of each row. Here,
> [ 0, 1 ] since the first blocks of the rows are blocks 0 and 1 inside
> nnzval.
> 

Thanks, I fixed this in the trunk.

>> (I don't think we have any code using this interface in examples/).
> 
> We do, see examples/spmv.
> 

OK, I missed this one.

Cyril.