Changeset 764 for soft/giet_vm/applications/transpose/transpose.py

Timestamp:

Jan 19, 2016, 1:19:14 PM (9 years ago)

Author:

alain

Message:

Modify the transpose application to use replace the
giet_fat_read() / giet_fat_write() system calls
by the giet_far_mmap() system call, in order to
avoid one copy of data in user space.

The read/write version is still available as transpose_rw.c

File:

• soft/giet_vm/applications/transpose/transpose.py (modified) (3 diffs)

soft/giet_vm/applications/transpose/transpose.py

@@ -35 +35 @@
     # define vsegs base & size
     code_base  = 0x10000000
-    code_size  = 0x00010000     # 64 Kbytes (per cluster)
+    code_size  = 0x00010000     # 64 Kbytes  (256 Mbytes max)
     
     data_base  = 0x20000000
-    data_size  = 0x00010000     # 64 Kbytes (non replicated)
+    data_size  = 0x00010000     # 64 Kbytes  (256 Mbytes max)
+
+    mmap_base  = 0x30000000 
+    mmap_size  = 0x10000000     # 256 Mbytes (non mapped) 
 
     stack_base = 0x40000000 
-    stack_size = 0x00010000     # 64 Kbytes (per thread)
+    stack_size = 0x00010000     # 64 Kbytes per thread  (64 Mbytes max)
 
     heap_base  = 0x60000000 
-    heap_size  = 0x00200000     # 2 Mbytes (per cluster) 
+    heap_size  = 0x00200000     # 2 Mbytes per cluster  (512 Mbytes max)
 
     # create vspace
-    vspace = mapping.addVspace( name = 'transpose', startname = 'trsp_data', active = False )
+    vspace = mapping.addVspace( name = 'transpose', startname = 'trsp_data', active = True )
     
     # data vseg : shared (only in cluster[0,0])
@@ -54 +57 @@
                      binpath = 'bin/transpose/appli.elf',
                      local = False )
+
+    # mmap vseg : non mapped in physical memory
+    mapping.addVseg( vspace, 'trsp_mmap', mmap_base , mmap_size, 
+                     'C_WU', vtype = 'MMAP', local = False )
 
     # code vsegs : local (one copy in each cluster)
@@ -75 +82 @@
                     proc_id = (((x * y_size) + y) * nprocs) + p
                     base    = stack_base + (proc_id * stack_size)
-
+                    size    = stack_size - 4096
                     mapping.addVseg( vspace, 'trsp_stack_%d_%d_%d' % (x,y,p), 
-                                     base, stack_size, 'C_WU', vtype = 'BUFFER', 
+                                     base , size , 'C_WU', vtype = 'BUFFER', 
                                      x = x , y = y , pseg = 'RAM',
-                                     local = True, big = True )
+                                     local = True )
 
     # heap vsegs: distributed non local (all heap vsegs can be accessed by all tasks)