1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (c) 2007 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "ifftw.h"
#if HAVE_CELL
#define USE_PS_AREA 1
#ifdef HAVE_LIBSPE2
# include <pthread.h>
# include <libspe2.h>
#else /* !HAVE_LIBSPE2 */
# include <libspe.h>
#endif /* !HAVE_LIBSPE2 */
#include "fftw-cell.h"
#include <stdlib.h> /* posix_memalign */
extern spe_program_handle_t X(spu_fftw);
void *X(cell_aligned_malloc)(size_t n)
{
void *p;
posix_memalign(&p, 128, n);
return p;
}
static struct spu_context *ctx[MAX_NSPE];
#ifdef HAVE_LIBSPE2
static pthread_t spe_pthread[MAX_NSPE];
static spe_context_ptr_t spe_id[MAX_NSPE];
# if USE_PS_AREA
static spe_spu_control_area_t *ps_area[MAX_NSPE];
# endif
#else
static speid_t spe_id[MAX_NSPE];
#endif
static int refcnt = 0;
static int nspe = -1;
static void set_default_nspe(void)
{
if (nspe < 0) {
/* set NSPE to the maximum of 8 and the number of physical
SPEs. A two-processor Cell blade reports 16 SPEs, but we
only want to use one processor by default. */
#ifdef HAVE_LIBSPE2
int phys = spe_cpu_info_get(SPE_COUNT_PHYSICAL_SPES, -1);
#else
int phys = spe_count_physical_spes();
#endif
if (phys > 8)
phys = 8;
X(cell_set_nspe)(phys);
}
}
#ifdef HAVE_LIBSPE2
static void *ppu_thread(void *arg)
{
int rc, i = (int) ((uintptr_t) arg);
do {
unsigned int entry = SPE_DEFAULT_ENTRY;
rc = spe_context_run(spe_id[i], &entry, 0, ctx[i], NULL, NULL);
} while (rc > 0);
pthread_exit(NULL);
}
#endif
void X(cell_activate_spes)(void)
{
if (refcnt++ == 0) {
int i;
set_default_nspe();
for(i = 0; i < nspe; ++i) {
ctx[i] = X(cell_aligned_malloc)(sizeof(*ctx[i]));
#ifdef HAVE_LIBSPE2
# if USE_PS_AREA
spe_id[i] = spe_context_create(SPE_MAP_PS, NULL);
if (spe_id[i])
ps_area[i] = (spe_spu_control_area_t *)
spe_ps_area_get(spe_id[i], SPE_CONTROL_AREA);
else { /* OS doesn't support SPE_MAP_PS */
spe_id[i] = spe_context_create(0, NULL);
ps_area[i] = NULL;
}
# else
spe_id[i] = spe_context_create(0, NULL);
# endif
spe_program_load(spe_id[i], &X(spu_fftw));
pthread_create(&spe_pthread[i], NULL, ppu_thread,
(void *) ((uintptr_t) i));
#else
spe_id[i] = spe_create_thread(0, &X(spu_fftw), ctx[i],
NULL, -1, 0);
#endif
}
}
}
void X(cell_deactivate_spes)(void)
{
if (--refcnt == 0) {
int i;
for (i = 0; i < nspe; ++i)
ctx[i]->op = FFTW_SPE_EXIT;
X(cell_spe_awake_all)();
for (i = 0; i < nspe; ++i) {
#ifdef HAVE_LIBSPE2
pthread_join(spe_pthread[i], NULL);
spe_context_destroy(spe_id[i]);
#else
int status = 0;
spe_wait(spe_id[i], &status, 0);
#endif
free(ctx[i]);
ctx[i] = 0;
}
}
}
int X(cell_nspe)(void)
{
return nspe;
}
void X(cell_set_nspe)(int n)
{
if (n > MAX_NSPE)
n = MAX_NSPE;
if (n < 0)
n = 0;
nspe = n;
}
struct spu_context *X(cell_get_ctx)(int spe)
{
return ctx[spe];
}
void X(cell_spe_awake_all)(void)
{
int i;
#ifdef HAVE_LIBSPE2
unsigned int zero = 0;
#endif
for (i = 0; i < nspe; ++i) {
ctx[i]->done = 0;
}
/* FIXME: do we need this? */
asm volatile ("sync");
for (i = 0; i < nspe; ++i) {
#ifdef HAVE_LIBSPE2
# if USE_PS_AREA
if (ps_area[i])
ps_area[i]->SPU_In_Mbox = 0;
else /* NULL if not supported by OS */
# endif
spe_in_mbox_write(spe_id[i], &zero, 1, SPE_MBOX_ANY_NONBLOCKING);
#else
spe_write_in_mbox(spe_id[i], 0);
#endif
}
}
void X(cell_spe_wait_all)(void)
{
int i;
for (i = 0; i < nspe; ++i) {
while (!ctx[i]->done)
;
}
/* BE Programming Handbook, 19.6.4 */
asm volatile ("lwsync");
}
#endif /* HAVE_CELL */
|
