47 }
48 }
49
50 /**
51 * Validate the minimum number of compiler threads needed to run the
52 * JVM. The following configurations are possible.
53 *
54 * 1) The JVM is build using an interpreter only. As a result, the minimum number of
55 * compiler threads is 0.
56 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As
57 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1.
58 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However,
59 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only
60 * C1 can be used, so the minimum number of compiler threads is 1.
61 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option
62 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result,
63 * the minimum number of compiler threads is 2.
64 */
65 Flag::Error CICompilerCountConstraintFunc(intx value, bool verbose) {
66 int min_number_of_compiler_threads = 0;
67 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI
68 // case 1
69 #else
70 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) {
71 min_number_of_compiler_threads = 1; // case 2 or case 3
72 } else {
73 min_number_of_compiler_threads = 2; // case 4 (tiered)
74 }
75 #endif
76
77 // The default CICompilerCount's value is CI_COMPILER_COUNT.
78 // With a client VM, -XX:+TieredCompilation causes TieredCompilation
79 // to be true here (the option is validated later) and
80 // min_number_of_compiler_threads to exceed CI_COMPILER_COUNT.
81 min_number_of_compiler_threads = MIN2(min_number_of_compiler_threads, CI_COMPILER_COUNT);
82
83 if (value < (intx)min_number_of_compiler_threads) {
84 CommandLineError::print(verbose,
85 "CICompilerCount (" INTX_FORMAT ") must be "
86 "at least %d \n",
87 value, min_number_of_compiler_threads);
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47 }
48 }
49
50 /**
51 * Validate the minimum number of compiler threads needed to run the
52 * JVM. The following configurations are possible.
53 *
54 * 1) The JVM is build using an interpreter only. As a result, the minimum number of
55 * compiler threads is 0.
56 * 2) The JVM is build using the compiler(s) and tiered compilation is disabled. As
57 * a result, either C1 or C2 is used, so the minimum number of compiler threads is 1.
58 * 3) The JVM is build using the compiler(s) and tiered compilation is enabled. However,
59 * the option "TieredStopAtLevel < CompLevel_full_optimization". As a result, only
60 * C1 can be used, so the minimum number of compiler threads is 1.
61 * 4) The JVM is build using the compilers and tiered compilation is enabled. The option
62 * 'TieredStopAtLevel = CompLevel_full_optimization' (the default value). As a result,
63 * the minimum number of compiler threads is 2.
64 */
65 Flag::Error CICompilerCountConstraintFunc(intx value, bool verbose) {
66 int min_number_of_compiler_threads = 0;
67 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI
68 // case 1
69 #else
70 if (!TieredCompilation || (TieredStopAtLevel < CompLevel_full_optimization)) {
71 min_number_of_compiler_threads = 1; // case 2 or case 3
72 } else {
73 min_number_of_compiler_threads = 2; // case 4 (tiered)
74 }
75 #endif
76
77 // The default CICompilerCount's value is CI_COMPILER_COUNT.
78 // With a client VM, -XX:+TieredCompilation causes TieredCompilation
79 // to be true here (the option is validated later) and
80 // min_number_of_compiler_threads to exceed CI_COMPILER_COUNT.
81 min_number_of_compiler_threads = MIN2(min_number_of_compiler_threads, CI_COMPILER_COUNT);
82
83 if (value < (intx)min_number_of_compiler_threads) {
84 CommandLineError::print(verbose,
85 "CICompilerCount (" INTX_FORMAT ") must be "
86 "at least %d \n",
87 value, min_number_of_compiler_threads);
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