23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.inline.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "runtime/java.hpp"
29 #include "runtime/stubCodeGenerator.hpp"
30 #include "vm_version_sparc.hpp"
31 #ifdef TARGET_OS_FAMILY_linux
32 # include "os_linux.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_FAMILY_solaris
35 # include "os_solaris.inline.hpp"
36 #endif
37
38 int VM_Version::_features = VM_Version::unknown_m;
39 const char* VM_Version::_features_str = "";
40 unsigned int VM_Version::_L2_data_cache_line_size = 0;
41
42 void VM_Version::initialize() {
43 _features = determine_features();
44 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
45 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
46 PrefetchFieldsAhead = prefetch_fields_ahead();
47
48 assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 1, "invalid value");
49 if( AllocatePrefetchInstr < 0 ) AllocatePrefetchInstr = 0;
50 if( AllocatePrefetchInstr > 1 ) AllocatePrefetchInstr = 0;
51
52 // Allocation prefetch settings
53 intx cache_line_size = prefetch_data_size();
54 if( cache_line_size > AllocatePrefetchStepSize )
55 AllocatePrefetchStepSize = cache_line_size;
56
57 assert(AllocatePrefetchLines > 0, "invalid value");
58 if( AllocatePrefetchLines < 1 ) // set valid value in product VM
59 AllocatePrefetchLines = 3;
60 assert(AllocateInstancePrefetchLines > 0, "invalid value");
61 if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM
62 AllocateInstancePrefetchLines = 1;
63
64 AllocatePrefetchDistance = allocate_prefetch_distance();
65 AllocatePrefetchStyle = allocate_prefetch_style();
66
67 assert((AllocatePrefetchDistance % AllocatePrefetchStepSize) == 0 &&
68 (AllocatePrefetchDistance > 0), "invalid value");
69 if ((AllocatePrefetchDistance % AllocatePrefetchStepSize) != 0 ||
70 (AllocatePrefetchDistance <= 0)) {
71 AllocatePrefetchDistance = AllocatePrefetchStepSize;
72 }
73
74 if (AllocatePrefetchStyle == 3 && !has_blk_init()) {
75 warning("BIS instructions are not available on this CPU");
76 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1);
77 }
78
79 guarantee(VM_Version::has_v9(), "only SPARC v9 is supported");
80
81 assert(ArraycopySrcPrefetchDistance < 4096, "invalid value");
82 if (ArraycopySrcPrefetchDistance >= 4096)
83 ArraycopySrcPrefetchDistance = 4064;
84 assert(ArraycopyDstPrefetchDistance < 4096, "invalid value");
85 if (ArraycopyDstPrefetchDistance >= 4096)
86 ArraycopyDstPrefetchDistance = 4064;
87
88 UseSSE = 0; // Only on x86 and x64
89
90 _supports_cx8 = has_v9();
91 _supports_atomic_getset4 = true; // swap instruction
92
93 // There are Fujitsu Sparc64 CPUs which support blk_init as well so
94 // we have to take this check out of the 'is_niagara()' block below.
95 if (has_blk_init()) {
96 // When using CMS or G1, we cannot use memset() in BOT updates
97 // because the sun4v/CMT version in libc_psr uses BIS which
98 // exposes "phantom zeros" to concurrent readers. See 6948537.
99 if (FLAG_IS_DEFAULT(UseMemSetInBOT) && (UseConcMarkSweepGC || UseG1GC)) {
100 FLAG_SET_DEFAULT(UseMemSetInBOT, false);
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23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.inline.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "runtime/java.hpp"
29 #include "runtime/stubCodeGenerator.hpp"
30 #include "vm_version_sparc.hpp"
31 #ifdef TARGET_OS_FAMILY_linux
32 # include "os_linux.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_FAMILY_solaris
35 # include "os_solaris.inline.hpp"
36 #endif
37
38 int VM_Version::_features = VM_Version::unknown_m;
39 const char* VM_Version::_features_str = "";
40 unsigned int VM_Version::_L2_data_cache_line_size = 0;
41
42 void VM_Version::initialize() {
43
44 assert(_features != VM_Version::unknown_m, "System pre-initialization is not complete.");
45 guarantee(VM_Version::has_v9(), "only SPARC v9 is supported");
46
47 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
48 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
49 PrefetchFieldsAhead = prefetch_fields_ahead();
50
51 assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 1, "invalid value");
52 if( AllocatePrefetchInstr < 0 ) AllocatePrefetchInstr = 0;
53 if( AllocatePrefetchInstr > 1 ) AllocatePrefetchInstr = 0;
54
55 // Allocation prefetch settings
56 intx cache_line_size = prefetch_data_size();
57 if( cache_line_size > AllocatePrefetchStepSize )
58 AllocatePrefetchStepSize = cache_line_size;
59
60 assert(AllocatePrefetchLines > 0, "invalid value");
61 if( AllocatePrefetchLines < 1 ) // set valid value in product VM
62 AllocatePrefetchLines = 3;
63 assert(AllocateInstancePrefetchLines > 0, "invalid value");
64 if( AllocateInstancePrefetchLines < 1 ) // set valid value in product VM
65 AllocateInstancePrefetchLines = 1;
66
67 AllocatePrefetchDistance = allocate_prefetch_distance();
68 AllocatePrefetchStyle = allocate_prefetch_style();
69
70 assert((AllocatePrefetchDistance % AllocatePrefetchStepSize) == 0 &&
71 (AllocatePrefetchDistance > 0), "invalid value");
72 if ((AllocatePrefetchDistance % AllocatePrefetchStepSize) != 0 ||
73 (AllocatePrefetchDistance <= 0)) {
74 AllocatePrefetchDistance = AllocatePrefetchStepSize;
75 }
76
77 if (AllocatePrefetchStyle == 3 && !has_blk_init()) {
78 warning("BIS instructions are not available on this CPU");
79 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1);
80 }
81
82 assert(ArraycopySrcPrefetchDistance < 4096, "invalid value");
83 if (ArraycopySrcPrefetchDistance >= 4096)
84 ArraycopySrcPrefetchDistance = 4064;
85 assert(ArraycopyDstPrefetchDistance < 4096, "invalid value");
86 if (ArraycopyDstPrefetchDistance >= 4096)
87 ArraycopyDstPrefetchDistance = 4064;
88
89 UseSSE = 0; // Only on x86 and x64
90
91 _supports_cx8 = has_v9();
92 _supports_atomic_getset4 = true; // swap instruction
93
94 // There are Fujitsu Sparc64 CPUs which support blk_init as well so
95 // we have to take this check out of the 'is_niagara()' block below.
96 if (has_blk_init()) {
97 // When using CMS or G1, we cannot use memset() in BOT updates
98 // because the sun4v/CMT version in libc_psr uses BIS which
99 // exposes "phantom zeros" to concurrent readers. See 6948537.
100 if (FLAG_IS_DEFAULT(UseMemSetInBOT) && (UseConcMarkSweepGC || UseG1GC)) {
101 FLAG_SET_DEFAULT(UseMemSetInBOT, false);
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