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comparison src/share/vm/memory/metaspaceShared.cpp @ 20389:622c6e0ad4d6

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8048150: Allow easy configurations for large CDS archives Summary: Estimate the size of shared archive based on the number of classes in the classlist file Reviewed-by: iklam, jiangli, minqi, dholmes
author ccheung
date Mon, 25 Aug 2014 00:13:36 -0700
parents 6e0cb14ce59b
children 8cb56c8cb30d
comparison
equal deleted inserted replaced
20386:edb5f3b38aab 20389:622c6e0ad4d6
813 class_count++; 813 class_count++;
814 } else { 814 } else {
815 //tty->print_cr("Preload failed: %s", class_name); 815 //tty->print_cr("Preload failed: %s", class_name);
816 } 816 }
817 } 817 }
818 fclose(file);
818 } else { 819 } else {
819 char errmsg[JVM_MAXPATHLEN]; 820 char errmsg[JVM_MAXPATHLEN];
820 os::lasterror(errmsg, JVM_MAXPATHLEN); 821 os::lasterror(errmsg, JVM_MAXPATHLEN);
821 tty->print_cr("Loading classlist failed: %s", errmsg); 822 tty->print_cr("Loading classlist failed: %s", errmsg);
822 exit(1); 823 exit(1);
1083 return false; 1084 return false;
1084 } 1085 }
1085 } 1086 }
1086 return true; 1087 return true;
1087 } 1088 }
1089
1090 int MetaspaceShared::count_class(const char* classlist_file) {
1091 if (classlist_file == NULL) {
1092 return 0;
1093 }
1094 char class_name[256];
1095 int class_count = 0;
1096 FILE* file = fopen(classlist_file, "r");
1097 if (file != NULL) {
1098 while ((fgets(class_name, sizeof class_name, file)) != NULL) {
1099 if (*class_name == '#') { // comment
1100 continue;
1101 }
1102 class_count++;
1103 }
1104 fclose(file);
1105 } else {
1106 char errmsg[JVM_MAXPATHLEN];
1107 os::lasterror(errmsg, JVM_MAXPATHLEN);
1108 tty->print_cr("Loading classlist failed: %s", errmsg);
1109 exit(1);
1110 }
1111
1112 return class_count;
1113 }
1114
1115 // the sizes are good for typical large applications that have a lot of shared
1116 // classes
1117 void MetaspaceShared::estimate_regions_size() {
1118 int class_count = count_class(SharedClassListFile);
1119 class_count += count_class(ExtraSharedClassListFile);
1120
1121 if (class_count > LargeThresholdClassCount) {
1122 if (class_count < HugeThresholdClassCount) {
1123 SET_ESTIMATED_SIZE(Large, ReadOnly);
1124 SET_ESTIMATED_SIZE(Large, ReadWrite);
1125 SET_ESTIMATED_SIZE(Large, MiscData);
1126 SET_ESTIMATED_SIZE(Large, MiscCode);
1127 } else {
1128 SET_ESTIMATED_SIZE(Huge, ReadOnly);
1129 SET_ESTIMATED_SIZE(Huge, ReadWrite);
1130 SET_ESTIMATED_SIZE(Huge, MiscData);
1131 SET_ESTIMATED_SIZE(Huge, MiscCode);
1132 }
1133 }
1134 }