Send data to all workers or receive data sent to all workers
shared_data = labBroadcast(srcWkrIdx,data)
shared_data = labBroadcast(srcWkrIdx)
| The |
| The data being broadcast. This argument is required only for the worker that is broadcasting. The absence of this argument indicates that a worker is receiving. |
| The broadcast data as it is received on all other workers. |
shared_data = labBroadcast(srcWkrIdx,data) sends
the specified data to all executing workers. The
data is broadcast from the worker with labindex == srcWkrIdx, and is received by all other workers.
shared_data = labBroadcast(srcWkrIdx) receives
on each executing worker the specified shared_data that
was sent from the worker whose labindex is srcWkrIdx.
If labindex is not srcWkrIdx,
then you do not include the data argument. This
indicates that the function is to receive data, not broadcast it.
The received data, shared_data, is identical on
all workers.
This function blocks execution until the worker's involvement
in the collective broadcast operation is complete. Because some workers
may complete their call to labBroadcast before
others have started, use labBarrier if
you need to guarantee that all workers are at the same point in a
program.
In this case, the broadcaster is the worker whose labindex is 1.
srcWkrIdx = 1; if labindex == srcWkrIdx data = randn(10); shared_data = labBroadcast(srcWkrIdx,data); else shared_data = labBroadcast(srcWkrIdx); end