source: soft/giet_vm/convol/convol.py @ 423

#!/usr/bin/env python

from mapping import *

######################################################################################
#   file   : convol.py  (for the convol application)
#   date   : may 2014
#   author : Alain Greiner
#######################################################################################
#  This file describes the mapping of the multi-threaded "convol" 
#  application on a multi-clusters, multi-processors architecture.
#  This include both the mapping of virtual segments on the clusters,
#  and the mapping of tasks on processors.
#  This mapping uses 5 platform parameters, (obtained from the "mapping" argument)
#  - x_size    : number of clusters in a row
#  - y_size    : number of clusters in a column
#  - x_width   : number of bits coding x coordinate
#  - y_width   : number of bits coding y coordinate
#  - nprocs : number of processors per cluster
####################################################################################

######################
def convol( mapping ):

    x_size    = mapping.x_size
    y_size    = mapping.y_size
    nprocs    = mapping.nprocs
    x_width   = mapping.x_width
    y_width   = mapping.y_width

    # define vsegs base & size
    code_base  = 0x10000000
    code_size  = 0x00010000     # 64 Kbytes (replicated in each cluster)
    
    data_base  = 0x20000000
    data_size  = 0x00010000     # 64 Kbytes (non replicated)

    heap_base  = 0x40000000     
    heap_size  = 0x01000000     # 16 Mbytes (per cluster)

    stack_base = 0x50000000     
    stack_size = 0x00200000     # 2 Mbytes (per cluster) 

    # create Vspace
    vspace = mapping.addVspace( name = 'convol', startname = 'conv_data' )
    
    # data vseg in cluster[0,0] : non local
    mapping.addVseg( vspace, 'conv_data', data_base , data_size, 'C_WU', vtype = 'ELF',
                     x = 0, y = 0, pseg = 'RAM', binpath = 'build/convol/convol.elf',
                     local = False )

    # code vsegs : local (one copy in each cluster)
    for x in xrange (x_size):
        for y in xrange (y_size):
            size       = code_size
            base       = code_base 
            mapping.addVseg( vspace, 'conv_code_%d_%d' % (x,y), base, size,
                             'CXWU', vtype = 'ELF', x = x , y = y , pseg = 'RAM', 
                             binpath = 'build/convol/convol.elf', 
                             local = True )

    # stack vsegs : local (one stack per processor)
    for x in xrange (x_size):
        for y in xrange (y_size):
            for p in xrange( nprocs ):
                proc_id = (((x * y_size) + y) * nprocs) + p
                size    = stack_size / nprocs
                base    = stack_base + (proc_id * size)
                mapping.addVseg( vspace, 'conv_stack_%d_%d_%d' % (x,y,p), base, size,
                                 'C_WU', vtype = 'BUFFER', x = x , y = y , pseg = 'RAM',
                                 local = True, big = True )
            
    # heap vsegs : distributed but non local (all heap vsegs can be accessed by all tasks)
    for x in xrange (x_size):
        for y in xrange (y_size):
            cluster_id = (x * y_size) + y
            size       = heap_size
            base       = heap_base + (cluster_id * size)
            mapping.addVseg( vspace, 'conv_heap_%d_%d' % (x,y), base, size,
                             'C_WU', vtype = 'BUFFER', x = x , y = y , pseg = 'RAM',
                             local = False, big = True )

    # distributed tasks : one task per processor 
    for x in xrange (x_size):
        for y in xrange (y_size):
            for p in xrange( nprocs ):
                trdid = (((x * y_size) + y) * nprocs) + p
                mapping.addTask( vspace, 'conv_%d_%d_%d' % (x,y,p), trdid, x, y, p,
                                 'conv_stack_%d_%d_%d' % (x,y,p),
                                 'conv_heap_%d_%d' % (x,y), 0 )

    # extend mapping name
    mapping.name += '_convol'

    return vspace  # useful for test
            
################################ test ######################################################

if __name__ == '__main__':

    vspace = convol( Mapping( 'test', 2, 2, 4 ) )
    print vspace.xml()


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