1 | #!/usr/bin/env python |
---|
2 | |
---|
3 | from mapping import * |
---|
4 | |
---|
5 | ################################################################################### |
---|
6 | # file : mjpeg.py |
---|
7 | # date : november 2015 |
---|
8 | # author : Alain Greiner |
---|
9 | ################################################################################### |
---|
10 | # This file describes the mapping of the multi-threaded "mjpeg" |
---|
11 | # application on a multi-clusters, multi-processors architecture. |
---|
12 | # |
---|
13 | # The mapping of threads on processors is the following: |
---|
14 | # - the "main" thread is running on P[0,0,0]. |
---|
15 | # - the "demux", "iqzz", "idct", "vld", and "libu" threads, implementing |
---|
16 | # a block-level pipe-line, are replicated in all clusters. |
---|
17 | # In each cluster the actual mapping depends on the <nprocs> parameter. |
---|
18 | # |
---|
19 | # The mapping of virtual segments is the following: |
---|
20 | # - There is one shared data vseg in cluster[0][0] |
---|
21 | # - The code vsegs are replicated in all clusters. |
---|
22 | # - There is one heap vseg per cluster (containing MWMR channels). |
---|
23 | # - The stacks vsegs are distibuted in all clusters. |
---|
24 | ################################################################################## |
---|
25 | |
---|
26 | ###################### |
---|
27 | def extend( mapping ): |
---|
28 | |
---|
29 | x_size = mapping.x_size |
---|
30 | y_size = mapping.y_size |
---|
31 | nprocs = mapping.nprocs |
---|
32 | |
---|
33 | assert (nprocs >= 1) and (nprocs <= 4) |
---|
34 | |
---|
35 | # define vsegs base & size |
---|
36 | code_base = 0x10000000 |
---|
37 | code_size = 0x00010000 # 64 Kbytes (per cluster) |
---|
38 | |
---|
39 | data_base = 0x20000000 |
---|
40 | data_size = 0x00010000 # 64 Kbytes (non replicated) |
---|
41 | |
---|
42 | heap_base = 0x30000000 |
---|
43 | heap_size = 0x00200000 # 2 Mbytes (per cluster) |
---|
44 | |
---|
45 | stack_base = 0x40000000 |
---|
46 | stack_size = 0x00020000 # 128 Kbytes (per thread) |
---|
47 | |
---|
48 | # create vspace |
---|
49 | vspace = mapping.addVspace( name = 'mjpeg', |
---|
50 | startname = 'mjpeg_data', |
---|
51 | active = True ) |
---|
52 | |
---|
53 | # data vseg : shared / cluster[0][0] |
---|
54 | mapping.addVseg( vspace, 'mjpeg_data', data_base , data_size, |
---|
55 | 'C_WU', vtype = 'ELF', x = 0, y = 0, pseg = 'RAM', |
---|
56 | binpath = 'bin/mjpeg/appli.elf', |
---|
57 | local = False ) |
---|
58 | |
---|
59 | # heap vsegs : shared (one per cluster) |
---|
60 | for x in xrange (x_size): |
---|
61 | for y in xrange (y_size): |
---|
62 | cluster_id = (x * y_size) + y |
---|
63 | if ( mapping.clusters[cluster_id].procs ): |
---|
64 | size = heap_size |
---|
65 | base = heap_base + (cluster_id * size) |
---|
66 | |
---|
67 | mapping.addVseg( vspace, 'mjpeg_heap_%d_%d' %(x,y), base , size, |
---|
68 | 'C_WU', vtype = 'HEAP', x = x, y = y, pseg = 'RAM', |
---|
69 | local = False, big = True ) |
---|
70 | |
---|
71 | # code vsegs : local (one copy per cluster) |
---|
72 | for x in xrange (x_size): |
---|
73 | for y in xrange (y_size): |
---|
74 | cluster_id = (x * y_size) + y |
---|
75 | if ( mapping.clusters[cluster_id].procs ): |
---|
76 | |
---|
77 | mapping.addVseg( vspace, 'mjpeg_code_%d_%d' %(x,y), |
---|
78 | code_base , code_size, |
---|
79 | 'CXWU', vtype = 'ELF', x = x, y = y, pseg = 'RAM', |
---|
80 | binpath = 'bin/mjpeg/appli.elf', |
---|
81 | local = True ) |
---|
82 | |
---|
83 | # stacks vsegs: local (one stack per thread => 5 stacks per cluster) |
---|
84 | # ... plus main_stack in cluster[0][0] |
---|
85 | base = stack_base |
---|
86 | mapping.addVseg( vspace, 'mjpeg_main_stack', |
---|
87 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
88 | x = 0 , y = 0 , pseg = 'RAM', |
---|
89 | local = True ) |
---|
90 | |
---|
91 | base += stack_size |
---|
92 | |
---|
93 | for x in xrange (x_size): |
---|
94 | for y in xrange (y_size): |
---|
95 | if ( mapping.clusters[cluster_id].procs ): |
---|
96 | |
---|
97 | mapping.addVseg( vspace, 'mjpeg_demux_stack_%d_%d' % (x,y), |
---|
98 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
99 | x = x , y = y , pseg = 'RAM', |
---|
100 | local = True ) |
---|
101 | |
---|
102 | base += stack_size |
---|
103 | |
---|
104 | mapping.addVseg( vspace, 'mjpeg_vld_stack_%d_%d' % (x,y), |
---|
105 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
106 | x = x , y = y , pseg = 'RAM', |
---|
107 | local = True ) |
---|
108 | |
---|
109 | base += stack_size |
---|
110 | |
---|
111 | mapping.addVseg( vspace, 'mjpeg_iqzz_stack_%d_%d' % (x,y), |
---|
112 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
113 | x = x , y = y , pseg = 'RAM', |
---|
114 | local = True ) |
---|
115 | |
---|
116 | base += stack_size |
---|
117 | |
---|
118 | mapping.addVseg( vspace, 'mjpeg_idct_stack_%d_%d' % (x,y), |
---|
119 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
120 | x = x , y = y , pseg = 'RAM', |
---|
121 | local = True ) |
---|
122 | |
---|
123 | base += stack_size |
---|
124 | |
---|
125 | mapping.addVseg( vspace, 'mjpeg_libu_stack_%d_%d' % (x,y), |
---|
126 | base, stack_size, 'C_WU', vtype = 'BUFFER', |
---|
127 | x = x , y = y , pseg = 'RAM', |
---|
128 | local = True ) |
---|
129 | |
---|
130 | base += stack_size |
---|
131 | |
---|
132 | # threads mapping: demux, vld, iqzz, idct, libu replicated in all clusters |
---|
133 | # main mapped in cluster[0,0] |
---|
134 | mapping.addThread( vspace, 'main', True, 0, 0, 0, |
---|
135 | 'mjpeg_main_stack', |
---|
136 | 'mjpeg_heap_0_0', |
---|
137 | 0 ) # index in start_vector |
---|
138 | |
---|
139 | if ( x==0 and y==0 ): # tasks mapping in cluster[0,0] |
---|
140 | if ( nprocs == 1 ): |
---|
141 | p_demux = 0 |
---|
142 | p_vld = 0 |
---|
143 | p_iqzz = 0 |
---|
144 | p_idct = 0 |
---|
145 | p_libu = 0 |
---|
146 | elif ( nprocs == 2 ): |
---|
147 | p_demux = 1 |
---|
148 | p_vld = 1 |
---|
149 | p_iqzz = 1 |
---|
150 | p_idct = 1 |
---|
151 | p_libu = 1 |
---|
152 | elif ( nprocs == 3 ): |
---|
153 | p_demux = 1 |
---|
154 | p_vld = 2 |
---|
155 | p_iqzz = 1 |
---|
156 | p_idct = 1 |
---|
157 | p_libu = 1 |
---|
158 | elif ( nprocs == 4 ): |
---|
159 | p_demux = 1 |
---|
160 | p_vld = 2 |
---|
161 | p_iqzz = 1 |
---|
162 | p_idct = 3 |
---|
163 | p_libu = 1 |
---|
164 | else: # tasks mapping in other clusters |
---|
165 | if ( nprocs == 1 ): |
---|
166 | p_demux = 0 |
---|
167 | p_vld = 0 |
---|
168 | p_iqzz = 0 |
---|
169 | p_idct = 0 |
---|
170 | p_libu = 0 |
---|
171 | elif ( nprocs == 2 ): |
---|
172 | p_demux = 0 |
---|
173 | p_vld = 1 |
---|
174 | p_iqzz = 0 |
---|
175 | p_idct = 0 |
---|
176 | p_libu = 0 |
---|
177 | elif ( nprocs == 3 ): |
---|
178 | p_demux = 0 |
---|
179 | p_vld = 1 |
---|
180 | p_iqzz = 0 |
---|
181 | p_idct = 2 |
---|
182 | p_libu = 1 |
---|
183 | elif ( nprocs == 4 ): |
---|
184 | p_demux = 0 |
---|
185 | p_vld = 1 |
---|
186 | p_iqzz = 2 |
---|
187 | p_idct = 3 |
---|
188 | p_libu = 2 |
---|
189 | |
---|
190 | |
---|
191 | for x in xrange (x_size): |
---|
192 | for y in xrange (y_size): |
---|
193 | if ( mapping.clusters[cluster_id].procs ): |
---|
194 | |
---|
195 | mapping.addThread( vspace, 'demux_%d_%d' % (x,y), False , x, y, p_demux, |
---|
196 | 'mjpeg_demux_stack_%d_%d' % (x,y), |
---|
197 | 'mjpeg_heap_%d_%d' % (x,y), |
---|
198 | 1 ) # start_index |
---|
199 | |
---|
200 | mapping.addThread( vspace, 'vld_%d_%d' % (x,y), False , x, y, p_vld, |
---|
201 | 'mjpeg_vld_stack_%d_%d' % (x,y), |
---|
202 | 'mjpeg_heap_%d_%d' % (x,y), |
---|
203 | 2 ) # start_index |
---|
204 | |
---|
205 | mapping.addThread( vspace, 'iqzz_%d_%d' % (x,y), False , x, y, p_iqzz, |
---|
206 | 'mjpeg_iqzz_stack_%d_%d' % (x,y), |
---|
207 | 'mjpeg_heap_%d_%d' % (x,y), |
---|
208 | 3 ) # start_index |
---|
209 | |
---|
210 | mapping.addThread( vspace, 'idct_%d_%d' % (x,y), False , x, y, p_idct, |
---|
211 | 'mjpeg_idct_stack_%d_%d' % (x,y), |
---|
212 | 'mjpeg_heap_%d_%d' % (x,y), |
---|
213 | 4 ) # start_index |
---|
214 | |
---|
215 | mapping.addThread( vspace, 'libu_%d_%d' % (x,y), False , x, y, p_libu, |
---|
216 | 'mjpeg_libu_stack_%d_%d' % (x,y), |
---|
217 | 'mjpeg_heap_%d_%d' % (x,y), |
---|
218 | 5 ) # start_index |
---|
219 | |
---|
220 | # extend mapping name |
---|
221 | mapping.name += '_mjpeg' |
---|
222 | |
---|
223 | return vspace # useful for test |
---|
224 | |
---|
225 | ################################ test ############################################ |
---|
226 | |
---|
227 | if __name__ == '__main__': |
---|
228 | |
---|
229 | vspace = extend( Mapping( 'test', 2, 2, 4 ) ) |
---|
230 | print vspace.xml() |
---|
231 | |
---|
232 | |
---|
233 | # Local Variables: |
---|
234 | # tab-width: 4; |
---|
235 | # c-basic-offset: 4; |
---|
236 | # c-file-offsets:((innamespace . 0)(inline-open . 0)); |
---|
237 | # indent-tabs-mode: nil; |
---|
238 | # End: |
---|
239 | # |
---|
240 | # vim: filetype=python:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
---|
241 | |
---|