--- a/jdk/src/java.base/unix/native/libjli/ergo_i586.c Mon Nov 14 16:33:48 2016 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,323 +0,0 @@
-/*
- * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code 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
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-#include "ergo.h"
-
-static unsigned long physical_processors(void);
-
-#ifdef __solaris__
-
-/*
- * A utility method for asking the CPU about itself.
- * There's a corresponding version of linux-i586
- * because the compilers are different.
- */
-static void
-get_cpuid(uint32_t arg,
- uint32_t* eaxp,
- uint32_t* ebxp,
- uint32_t* ecxp,
- uint32_t* edxp) {
-#ifdef _LP64
- asm(
- /* rbx is a callee-saved register */
- " movq %rbx, %r11 \n"
- /* rdx and rcx are 3rd and 4th argument registers */
- " movq %rdx, %r10 \n"
- " movq %rcx, %r9 \n"
- " movl %edi, %eax \n"
- " cpuid \n"
- " movl %eax, (%rsi)\n"
- " movl %ebx, (%r10)\n"
- " movl %ecx, (%r9) \n"
- " movl %edx, (%r8) \n"
- /* Restore rbx */
- " movq %r11, %rbx");
-#else
- /* EBX is a callee-saved register */
- asm(" pushl %ebx");
- /* Need ESI for storing through arguments */
- asm(" pushl %esi");
- asm(" movl 8(%ebp), %eax \n"
- " cpuid \n"
- " movl 12(%ebp), %esi \n"
- " movl %eax, (%esi) \n"
- " movl 16(%ebp), %esi \n"
- " movl %ebx, (%esi) \n"
- " movl 20(%ebp), %esi \n"
- " movl %ecx, (%esi) \n"
- " movl 24(%ebp), %esi \n"
- " movl %edx, (%esi) ");
- /* Restore ESI and EBX */
- asm(" popl %esi");
- /* Restore EBX */
- asm(" popl %ebx");
-#endif /* LP64 */
-}
-
-/* The definition of a server-class machine for solaris-i586/amd64 */
-jboolean
-ServerClassMachineImpl(void) {
- jboolean result = JNI_FALSE;
- /* How big is a server class machine? */
- const unsigned long server_processors = 2UL;
- const uint64_t server_memory = 2UL * GB;
- /*
- * We seem not to get our full complement of memory.
- * We allow some part (1/8?) of the memory to be "missing",
- * based on the sizes of DIMMs, and maybe graphics cards.
- */
- const uint64_t missing_memory = 256UL * MB;
- const uint64_t actual_memory = physical_memory();
-
- /* Is this a server class machine? */
- if (actual_memory >= (server_memory - missing_memory)) {
- const unsigned long actual_processors = physical_processors();
- if (actual_processors >= server_processors) {
- result = JNI_TRUE;
- }
- }
- JLI_TraceLauncher("solaris_" LIBARCHNAME "_ServerClassMachine: %s\n",
- (result == JNI_TRUE ? "true" : "false"));
- return result;
-}
-
-#endif /* __solaris__ */
-
-#ifdef __linux__
-
-/*
- * A utility method for asking the CPU about itself.
- * There's a corresponding version of solaris-i586
- * because the compilers are different.
- */
-static void
-get_cpuid(uint32_t arg,
- uint32_t* eaxp,
- uint32_t* ebxp,
- uint32_t* ecxp,
- uint32_t* edxp) {
-#ifdef _LP64
- __asm__ volatile (/* Instructions */
- " movl %4, %%eax \n"
- " cpuid \n"
- " movl %%eax, (%0)\n"
- " movl %%ebx, (%1)\n"
- " movl %%ecx, (%2)\n"
- " movl %%edx, (%3)\n"
- : /* Outputs */
- : /* Inputs */
- "r" (eaxp),
- "r" (ebxp),
- "r" (ecxp),
- "r" (edxp),
- "r" (arg)
- : /* Clobbers */
- "%rax", "%rbx", "%rcx", "%rdx", "memory"
- );
-#else /* _LP64 */
- uint32_t value_of_eax = 0;
- uint32_t value_of_ebx = 0;
- uint32_t value_of_ecx = 0;
- uint32_t value_of_edx = 0;
- __asm__ volatile (/* Instructions */
- /* ebx is callee-save, so push it */
- " pushl %%ebx \n"
- " movl %4, %%eax \n"
- " cpuid \n"
- " movl %%eax, %0 \n"
- " movl %%ebx, %1 \n"
- " movl %%ecx, %2 \n"
- " movl %%edx, %3 \n"
- /* restore ebx */
- " popl %%ebx \n"
-
- : /* Outputs */
- "=m" (value_of_eax),
- "=m" (value_of_ebx),
- "=m" (value_of_ecx),
- "=m" (value_of_edx)
- : /* Inputs */
- "m" (arg)
- : /* Clobbers */
- "%eax", "%ecx", "%edx"
- );
- *eaxp = value_of_eax;
- *ebxp = value_of_ebx;
- *ecxp = value_of_ecx;
- *edxp = value_of_edx;
-#endif /* _LP64 */
-}
-
-/* The definition of a server-class machine for linux-i586 */
-jboolean
-ServerClassMachineImpl(void) {
- jboolean result = JNI_FALSE;
- /* How big is a server class machine? */
- const unsigned long server_processors = 2UL;
- const uint64_t server_memory = 2UL * GB;
- /*
- * We seem not to get our full complement of memory.
- * We allow some part (1/8?) of the memory to be "missing",
- * based on the sizes of DIMMs, and maybe graphics cards.
- */
- const uint64_t missing_memory = 256UL * MB;
- const uint64_t actual_memory = physical_memory();
-
- /* Is this a server class machine? */
- if (actual_memory >= (server_memory - missing_memory)) {
- const unsigned long actual_processors = physical_processors();
- if (actual_processors >= server_processors) {
- result = JNI_TRUE;
- }
- }
- JLI_TraceLauncher("linux_" LIBARCHNAME "_ServerClassMachine: %s\n",
- (result == JNI_TRUE ? "true" : "false"));
- return result;
-}
-#endif /* __linux__ */
-
-/*
- * Routines shared by solaris-i586 and linux-i586.
- */
-
-enum HyperThreadingSupport_enum {
- hts_supported = 1,
- hts_too_soon_to_tell = 0,
- hts_not_supported = -1,
- hts_not_pentium4 = -2,
- hts_not_intel = -3
-};
-typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
-
-/* Determine if hyperthreading is supported */
-static HyperThreadingSupport
-hyperthreading_support(void) {
- HyperThreadingSupport result = hts_too_soon_to_tell;
- /* Bits 11 through 8 is family processor id */
-# define FAMILY_ID_SHIFT 8
-# define FAMILY_ID_MASK 0xf
- /* Bits 23 through 20 is extended family processor id */
-# define EXT_FAMILY_ID_SHIFT 20
-# define EXT_FAMILY_ID_MASK 0xf
- /* Pentium 4 family processor id */
-# define PENTIUM4_FAMILY_ID 0xf
- /* Bit 28 indicates Hyper-Threading Technology support */
-# define HT_BIT_SHIFT 28
-# define HT_BIT_MASK 1
- uint32_t vendor_id[3] = { 0U, 0U, 0U };
- uint32_t value_of_eax = 0U;
- uint32_t value_of_edx = 0U;
- uint32_t dummy = 0U;
-
- /* Yes, this is supposed to be [0], [2], [1] */
- get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
- JLI_TraceLauncher("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
- ((vendor_id[0] >> 0) & 0xff),
- ((vendor_id[0] >> 8) & 0xff),
- ((vendor_id[0] >> 16) & 0xff),
- ((vendor_id[0] >> 24) & 0xff),
- ((vendor_id[1] >> 0) & 0xff),
- ((vendor_id[1] >> 8) & 0xff),
- ((vendor_id[1] >> 16) & 0xff),
- ((vendor_id[1] >> 24) & 0xff),
- ((vendor_id[2] >> 0) & 0xff),
- ((vendor_id[2] >> 8) & 0xff),
- ((vendor_id[2] >> 16) & 0xff),
- ((vendor_id[2] >> 24) & 0xff));
- get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
- JLI_TraceLauncher("value_of_eax: 0x%x value_of_edx: 0x%x\n",
- value_of_eax, value_of_edx);
- if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
- (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
- if ((((vendor_id[0] >> 0) & 0xff) == 'G') &&
- (((vendor_id[0] >> 8) & 0xff) == 'e') &&
- (((vendor_id[0] >> 16) & 0xff) == 'n') &&
- (((vendor_id[0] >> 24) & 0xff) == 'u') &&
- (((vendor_id[1] >> 0) & 0xff) == 'i') &&
- (((vendor_id[1] >> 8) & 0xff) == 'n') &&
- (((vendor_id[1] >> 16) & 0xff) == 'e') &&
- (((vendor_id[1] >> 24) & 0xff) == 'I') &&
- (((vendor_id[2] >> 0) & 0xff) == 'n') &&
- (((vendor_id[2] >> 8) & 0xff) == 't') &&
- (((vendor_id[2] >> 16) & 0xff) == 'e') &&
- (((vendor_id[2] >> 24) & 0xff) == 'l')) {
- if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
- JLI_TraceLauncher("Hyperthreading supported\n");
- result = hts_supported;
- } else {
- JLI_TraceLauncher("Hyperthreading not supported\n");
- result = hts_not_supported;
- }
- } else {
- JLI_TraceLauncher("Not GenuineIntel\n");
- result = hts_not_intel;
- }
- } else {
- JLI_TraceLauncher("not Pentium 4 or extended\n");
- result = hts_not_pentium4;
- }
- return result;
-}
-
-/* Determine how many logical processors there are per CPU */
-static unsigned int
-logical_processors_per_package(void) {
- /*
- * After CPUID with EAX==1, register EBX bits 23 through 16
- * indicate the number of logical processors per package
- */
-# define NUM_LOGICAL_SHIFT 16
-# define NUM_LOGICAL_MASK 0xff
- unsigned int result = 1U;
- const HyperThreadingSupport hyperthreading = hyperthreading_support();
-
- if (hyperthreading == hts_supported) {
- uint32_t value_of_ebx = 0U;
- uint32_t dummy = 0U;
-
- get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
- result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
- JLI_TraceLauncher("logical processors per package: %u\n", result);
- }
- return result;
-}
-
-/* Compute the number of physical processors, not logical processors */
-static unsigned long
-physical_processors(void) {
- const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
- unsigned long result = sys_processors;
-
- JLI_TraceLauncher("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
- if (sys_processors > 1) {
- unsigned int logical_processors = logical_processors_per_package();
- if (logical_processors > 1) {
- result = (unsigned long) sys_processors / logical_processors;
- }
- }
- JLI_TraceLauncher("physical processors: %lu\n", result);
- return result;
-}