|
1 /* |
|
2 * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved. |
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
|
4 * |
|
5 * This code is free software; you can redistribute it and/or modify it |
|
6 * under the terms of the GNU General Public License version 2 only, as |
|
7 * published by the Free Software Foundation. Sun designates this |
|
8 * particular file as subject to the "Classpath" exception as provided |
|
9 * by Sun in the LICENSE file that accompanied this code. |
|
10 * |
|
11 * This code is distributed in the hope that it will be useful, but WITHOUT |
|
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
14 * version 2 for more details (a copy is included in the LICENSE file that |
|
15 * accompanied this code). |
|
16 * |
|
17 * You should have received a copy of the GNU General Public License version |
|
18 * 2 along with this work; if not, write to the Free Software Foundation, |
|
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
20 * |
|
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
|
22 * CA 95054 USA or visit www.sun.com if you need additional information or |
|
23 * have any questions. |
|
24 */ |
|
25 |
|
26 #include "ergo.h" |
|
27 |
|
28 static unsigned long physical_processors(void); |
|
29 |
|
30 #ifdef __solaris__ |
|
31 |
|
32 /* |
|
33 * A utility method for asking the CPU about itself. |
|
34 * There's a corresponding version of linux-i586 |
|
35 * because the compilers are different. |
|
36 */ |
|
37 static void |
|
38 get_cpuid(uint32_t arg, |
|
39 uint32_t* eaxp, |
|
40 uint32_t* ebxp, |
|
41 uint32_t* ecxp, |
|
42 uint32_t* edxp) { |
|
43 #ifdef _LP64 |
|
44 asm( |
|
45 /* rbx is a callee-saved register */ |
|
46 " movq %rbx, %r11 \n" |
|
47 /* rdx and rcx are 3rd and 4th argument registers */ |
|
48 " movq %rdx, %r10 \n" |
|
49 " movq %rcx, %r9 \n" |
|
50 " movl %edi, %eax \n" |
|
51 " cpuid \n" |
|
52 " movl %eax, (%rsi)\n" |
|
53 " movl %ebx, (%r10)\n" |
|
54 " movl %ecx, (%r9) \n" |
|
55 " movl %edx, (%r8) \n" |
|
56 /* Restore rbx */ |
|
57 " movq %r11, %rbx"); |
|
58 #else |
|
59 /* EBX is a callee-saved register */ |
|
60 asm(" pushl %ebx"); |
|
61 /* Need ESI for storing through arguments */ |
|
62 asm(" pushl %esi"); |
|
63 asm(" movl 8(%ebp), %eax \n" |
|
64 " cpuid \n" |
|
65 " movl 12(%ebp), %esi \n" |
|
66 " movl %eax, (%esi) \n" |
|
67 " movl 16(%ebp), %esi \n" |
|
68 " movl %ebx, (%esi) \n" |
|
69 " movl 20(%ebp), %esi \n" |
|
70 " movl %ecx, (%esi) \n" |
|
71 " movl 24(%ebp), %esi \n" |
|
72 " movl %edx, (%esi) "); |
|
73 /* Restore ESI and EBX */ |
|
74 asm(" popl %esi"); |
|
75 /* Restore EBX */ |
|
76 asm(" popl %ebx"); |
|
77 #endif /* LP64 */ |
|
78 } |
|
79 |
|
80 /* The definition of a server-class machine for solaris-i586/amd64 */ |
|
81 jboolean |
|
82 ServerClassMachineImpl(void) { |
|
83 jboolean result = JNI_FALSE; |
|
84 /* How big is a server class machine? */ |
|
85 const unsigned long server_processors = 2UL; |
|
86 const uint64_t server_memory = 2UL * GB; |
|
87 /* |
|
88 * We seem not to get our full complement of memory. |
|
89 * We allow some part (1/8?) of the memory to be "missing", |
|
90 * based on the sizes of DIMMs, and maybe graphics cards. |
|
91 */ |
|
92 const uint64_t missing_memory = 256UL * MB; |
|
93 const uint64_t actual_memory = physical_memory(); |
|
94 |
|
95 /* Is this a server class machine? */ |
|
96 if (actual_memory >= (server_memory - missing_memory)) { |
|
97 const unsigned long actual_processors = physical_processors(); |
|
98 if (actual_processors >= server_processors) { |
|
99 result = JNI_TRUE; |
|
100 } |
|
101 } |
|
102 JLI_TraceLauncher("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n", |
|
103 (result == JNI_TRUE ? "true" : "false")); |
|
104 return result; |
|
105 } |
|
106 |
|
107 #endif /* __solaris__ */ |
|
108 |
|
109 #ifdef __linux__ |
|
110 |
|
111 /* |
|
112 * A utility method for asking the CPU about itself. |
|
113 * There's a corresponding version of solaris-i586 |
|
114 * because the compilers are different. |
|
115 */ |
|
116 static void |
|
117 get_cpuid(uint32_t arg, |
|
118 uint32_t* eaxp, |
|
119 uint32_t* ebxp, |
|
120 uint32_t* ecxp, |
|
121 uint32_t* edxp) { |
|
122 #ifdef _LP64 |
|
123 __asm__ volatile (/* Instructions */ |
|
124 " movl %4, %%eax \n" |
|
125 " cpuid \n" |
|
126 " movl %%eax, (%0)\n" |
|
127 " movl %%ebx, (%1)\n" |
|
128 " movl %%ecx, (%2)\n" |
|
129 " movl %%edx, (%3)\n" |
|
130 : /* Outputs */ |
|
131 : /* Inputs */ |
|
132 "r" (eaxp), |
|
133 "r" (ebxp), |
|
134 "r" (ecxp), |
|
135 "r" (edxp), |
|
136 "r" (arg) |
|
137 : /* Clobbers */ |
|
138 "%rax", "%rbx", "%rcx", "%rdx", "memory" |
|
139 ); |
|
140 #else /* _LP64 */ |
|
141 uint32_t value_of_eax = 0; |
|
142 uint32_t value_of_ebx = 0; |
|
143 uint32_t value_of_ecx = 0; |
|
144 uint32_t value_of_edx = 0; |
|
145 __asm__ volatile (/* Instructions */ |
|
146 /* ebx is callee-save, so push it */ |
|
147 " pushl %%ebx \n" |
|
148 " movl %4, %%eax \n" |
|
149 " cpuid \n" |
|
150 " movl %%eax, %0 \n" |
|
151 " movl %%ebx, %1 \n" |
|
152 " movl %%ecx, %2 \n" |
|
153 " movl %%edx, %3 \n" |
|
154 /* restore ebx */ |
|
155 " popl %%ebx \n" |
|
156 |
|
157 : /* Outputs */ |
|
158 "=m" (value_of_eax), |
|
159 "=m" (value_of_ebx), |
|
160 "=m" (value_of_ecx), |
|
161 "=m" (value_of_edx) |
|
162 : /* Inputs */ |
|
163 "m" (arg) |
|
164 : /* Clobbers */ |
|
165 "%eax", "%ecx", "%edx" |
|
166 ); |
|
167 *eaxp = value_of_eax; |
|
168 *ebxp = value_of_ebx; |
|
169 *ecxp = value_of_ecx; |
|
170 *edxp = value_of_edx; |
|
171 #endif /* _LP64 */ |
|
172 } |
|
173 |
|
174 /* The definition of a server-class machine for linux-i586 */ |
|
175 jboolean |
|
176 ServerClassMachineImpl(void) { |
|
177 jboolean result = JNI_FALSE; |
|
178 /* How big is a server class machine? */ |
|
179 const unsigned long server_processors = 2UL; |
|
180 const uint64_t server_memory = 2UL * GB; |
|
181 /* |
|
182 * We seem not to get our full complement of memory. |
|
183 * We allow some part (1/8?) of the memory to be "missing", |
|
184 * based on the sizes of DIMMs, and maybe graphics cards. |
|
185 */ |
|
186 const uint64_t missing_memory = 256UL * MB; |
|
187 const uint64_t actual_memory = physical_memory(); |
|
188 |
|
189 /* Is this a server class machine? */ |
|
190 if (actual_memory >= (server_memory - missing_memory)) { |
|
191 const unsigned long actual_processors = physical_processors(); |
|
192 if (actual_processors >= server_processors) { |
|
193 result = JNI_TRUE; |
|
194 } |
|
195 } |
|
196 JLI_TraceLauncher("linux_" LIBARCHNAME "_ServerClassMachine: %s\n", |
|
197 (result == JNI_TRUE ? "true" : "false")); |
|
198 return result; |
|
199 } |
|
200 #endif /* __linux__ */ |
|
201 |
|
202 /* |
|
203 * Routines shared by solaris-i586 and linux-i586. |
|
204 */ |
|
205 |
|
206 enum HyperThreadingSupport_enum { |
|
207 hts_supported = 1, |
|
208 hts_too_soon_to_tell = 0, |
|
209 hts_not_supported = -1, |
|
210 hts_not_pentium4 = -2, |
|
211 hts_not_intel = -3 |
|
212 }; |
|
213 typedef enum HyperThreadingSupport_enum HyperThreadingSupport; |
|
214 |
|
215 /* Determine if hyperthreading is supported */ |
|
216 static HyperThreadingSupport |
|
217 hyperthreading_support(void) { |
|
218 HyperThreadingSupport result = hts_too_soon_to_tell; |
|
219 /* Bits 11 through 8 is family processor id */ |
|
220 # define FAMILY_ID_SHIFT 8 |
|
221 # define FAMILY_ID_MASK 0xf |
|
222 /* Bits 23 through 20 is extended family processor id */ |
|
223 # define EXT_FAMILY_ID_SHIFT 20 |
|
224 # define EXT_FAMILY_ID_MASK 0xf |
|
225 /* Pentium 4 family processor id */ |
|
226 # define PENTIUM4_FAMILY_ID 0xf |
|
227 /* Bit 28 indicates Hyper-Threading Technology support */ |
|
228 # define HT_BIT_SHIFT 28 |
|
229 # define HT_BIT_MASK 1 |
|
230 uint32_t vendor_id[3] = { 0U, 0U, 0U }; |
|
231 uint32_t value_of_eax = 0U; |
|
232 uint32_t value_of_edx = 0U; |
|
233 uint32_t dummy = 0U; |
|
234 |
|
235 /* Yes, this is supposed to be [0], [2], [1] */ |
|
236 get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]); |
|
237 JLI_TraceLauncher("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n", |
|
238 ((vendor_id[0] >> 0) & 0xff), |
|
239 ((vendor_id[0] >> 8) & 0xff), |
|
240 ((vendor_id[0] >> 16) & 0xff), |
|
241 ((vendor_id[0] >> 24) & 0xff), |
|
242 ((vendor_id[1] >> 0) & 0xff), |
|
243 ((vendor_id[1] >> 8) & 0xff), |
|
244 ((vendor_id[1] >> 16) & 0xff), |
|
245 ((vendor_id[1] >> 24) & 0xff), |
|
246 ((vendor_id[2] >> 0) & 0xff), |
|
247 ((vendor_id[2] >> 8) & 0xff), |
|
248 ((vendor_id[2] >> 16) & 0xff), |
|
249 ((vendor_id[2] >> 24) & 0xff)); |
|
250 get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx); |
|
251 JLI_TraceLauncher("value_of_eax: 0x%x value_of_edx: 0x%x\n", |
|
252 value_of_eax, value_of_edx); |
|
253 if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) || |
|
254 (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) { |
|
255 if ((((vendor_id[0] >> 0) & 0xff) == 'G') && |
|
256 (((vendor_id[0] >> 8) & 0xff) == 'e') && |
|
257 (((vendor_id[0] >> 16) & 0xff) == 'n') && |
|
258 (((vendor_id[0] >> 24) & 0xff) == 'u') && |
|
259 (((vendor_id[1] >> 0) & 0xff) == 'i') && |
|
260 (((vendor_id[1] >> 8) & 0xff) == 'n') && |
|
261 (((vendor_id[1] >> 16) & 0xff) == 'e') && |
|
262 (((vendor_id[1] >> 24) & 0xff) == 'I') && |
|
263 (((vendor_id[2] >> 0) & 0xff) == 'n') && |
|
264 (((vendor_id[2] >> 8) & 0xff) == 't') && |
|
265 (((vendor_id[2] >> 16) & 0xff) == 'e') && |
|
266 (((vendor_id[2] >> 24) & 0xff) == 'l')) { |
|
267 if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) { |
|
268 JLI_TraceLauncher("Hyperthreading supported\n"); |
|
269 result = hts_supported; |
|
270 } else { |
|
271 JLI_TraceLauncher("Hyperthreading not supported\n"); |
|
272 result = hts_not_supported; |
|
273 } |
|
274 } else { |
|
275 JLI_TraceLauncher("Not GenuineIntel\n"); |
|
276 result = hts_not_intel; |
|
277 } |
|
278 } else { |
|
279 JLI_TraceLauncher("not Pentium 4 or extended\n"); |
|
280 result = hts_not_pentium4; |
|
281 } |
|
282 return result; |
|
283 } |
|
284 |
|
285 /* Determine how many logical processors there are per CPU */ |
|
286 static unsigned int |
|
287 logical_processors_per_package(void) { |
|
288 /* |
|
289 * After CPUID with EAX==1, register EBX bits 23 through 16 |
|
290 * indicate the number of logical processors per package |
|
291 */ |
|
292 # define NUM_LOGICAL_SHIFT 16 |
|
293 # define NUM_LOGICAL_MASK 0xff |
|
294 unsigned int result = 1U; |
|
295 const HyperThreadingSupport hyperthreading = hyperthreading_support(); |
|
296 |
|
297 if (hyperthreading == hts_supported) { |
|
298 uint32_t value_of_ebx = 0U; |
|
299 uint32_t dummy = 0U; |
|
300 |
|
301 get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy); |
|
302 result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK; |
|
303 JLI_TraceLauncher("logical processors per package: %u\n", result); |
|
304 } |
|
305 return result; |
|
306 } |
|
307 |
|
308 /* Compute the number of physical processors, not logical processors */ |
|
309 static unsigned long |
|
310 physical_processors(void) { |
|
311 const long sys_processors = sysconf(_SC_NPROCESSORS_CONF); |
|
312 unsigned long result = sys_processors; |
|
313 |
|
314 JLI_TraceLauncher("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors); |
|
315 if (sys_processors > 1) { |
|
316 unsigned int logical_processors = logical_processors_per_package(); |
|
317 if (logical_processors > 1) { |
|
318 result = (unsigned long) sys_processors / logical_processors; |
|
319 } |
|
320 } |
|
321 JLI_TraceLauncher("physical processors: %lu\n", result); |
|
322 return result; |
|
323 } |