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VM\u65e2\u7ee7\u627f\u4e86Sun\u4e4b\u524d\u4e24\u6b3e\u5546\u7528\u865a\u62df\u673a\u7684\u4f18\u70b9&#xff08;\u5982\u524d\u9762\u63d0\u5230\u7684\u51c6\u786e\u5f0f\u5185\u5b58\u7ba1\u7406&#xff09;&#xff0c;\u4e5f\u6709\u8bb8\u591a\u81ea\u5df1\u65b0\u7684\u6280\u672f\u4f18\u52bf&#xff0c; \u5982\u5b83\u540d\u79f0\u4e2d\u7684HotSpot\u6307\u7684\u5c31\u662f\u5b83\u7684\u70ed\u70b9\u4ee3\u7801\u63a2\u6d4b\u6280\u672f&#xff08;\u5176\u5b9e\u4e24\u4e2aVM\u57fa\u672c\u4e0a\u662f\u540c\u65f6\u671f\u7684\u72ec\u7acb\u4ea7\u54c1&#xff0c;<br \/>\nHotSpot\u8fd8\u7a0d\u65e9\u4e00\u4e9b&#xff0c;HotSpot\u4e00\u5f00\u59cb\u5c31\u662f\u51c6\u786e\u5f0fGC&#xff0c; \u800cExact VM\u4e4b\u4e2d\u4e5f\u6709\u4e0eHotSpot\u51e0\u4e4e\u4e00\u6837\u7684\u70ed\u70b9\u63a2\u6d4b\u3002<br \/>\n\u4e3a\u4e86Exact VM\u548cHotSpot VM\u54ea\u4e2a\u6210\u4e3aSun\u4e3b\u8981\u652f\u6301\u7684VM\u4ea7\u54c1&#xff0c;\u5728Sun\u516c\u53f8\u5185\u90e8\u8fd8\u6709\u8fc7\u4e89\u8bba&#xff0c;<br \/>\nHotSpot\u6253\u8d25Exact\u5e76\u4e0d\u80fd\u7b97\u6280\u672f\u4e0a\u7684\u80dc\u5229&#xff09;&#xff0c; HotSpot VM\u7684\u70ed\u70b9\u4ee3\u7801\u63a2\u6d4b\u80fd\u529b\u53ef\u4ee5\u901a\u8fc7\u6267\u884c\u8ba1\u6570\u5668\u627e\u51fa\u6700\u5177\u6709\u7f16\u8bd1\u4ef7\u503c\u7684\u4ee3\u7801&#xff0c;\u7136\u540e\u901a\u77e5JIT\u7f16\u8bd1\u5668\u4ee5\u65b9\u6cd5\u4e3a\u5355\u4f4d\u8fdb\u884c\u7f16\u8bd1\u3002 \u5982\u679c\u4e00\u4e2a\u65b9\u6cd5\u88ab\u9891\u7e41\u8c03\u7528&#xff0c;\u6216\u65b9\u6cd5\u4e2d\u6709\u6548\u5faa\u73af\u6b21\u6570\u5f88\u591a&#xff0c;\u5c06\u4f1a\u5206\u522b\u89e6\u53d1\u6807\u51c6\u7f16\u8bd1\u548cOSR&#xff08;\u6808\u4e0a\u66ff\u6362&#xff09;\u7f16\u8bd1\u52a8\u4f5c\u3002 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VM&#xff09;\u5728GPL\u534f\u8bae\u4e0b\u516c\u5f00\u4e86\u6e90\u7801&#xff0c; \u5e76\u5728\u6b64\u57fa\u7840\u4e0a\u5efa\u7acb\u4e86OpenJDK\u3002\u8fd9\u6837&#xff0c;<\/p>\n<p>HotSpot VM\u4fbf\u6210\u4e3a\u4e86Sun JDK\u548cOpenJDK\u4e24\u4e2a\u5b9e\u73b0\u6781\u5ea6\u63a5\u8fd1\u7684JDK\u9879\u76ee\u7684\u5171\u540c\u865a\u62df\u673a\u3002<br \/>\n\u57282008\u5e74\u548c2009\u5e74&#xff0c;Oracle\u516c\u53f8\u5206\u522b\u6536\u8d2d\u4e86BEA\u516c\u53f8\u548cSun\u516c\u53f8&#xff0c;\u8fd9\u6837Oracle\u5c31\u540c\u65f6\u62e5\u6709\u4e86\u4e24\u6b3e\u4f18\u79c0\u7684Java\u865a\u62df\u673a&#xff1a;JRockit VM\u548cHotSpot VM\u3002<br \/>\n Oracle\u516c\u53f8\u5ba3\u5e03\u5728\u4e0d\u4e45\u7684\u5c06\u6765&#xff08;\u5927\u7ea6\u5e94\u5728\u53d1\u5e03JDK 8\u7684\u65f6\u5019&#xff09;\u4f1a\u5b8c\u6210\u8fd9\u4e24\u6b3e\u865a\u62df\u673a\u7684\u6574\u5408\u5de5\u4f5c&#xff0c;\u4f7f\u4e4b\u4f18\u52bf\u4e92\u8865\u3002 \u6574\u5408\u7684\u65b9\u5f0f\u5927\u81f4\u4e0a\u662f\u5728HotSpot\u7684\u57fa\u7840\u4e0a&#xff0c;\u79fb\u690dJRockit\u7684\u4f18\u79c0\u7279\u6027&#xff0c;\u8b6c\u5982\u4f7f\u7528JRockit\u7684\u5783\u573e\u56de\u6536\u5668\u4e0eMissionControl\u670d\u52a1&#xff0c; \u4f7f\u7528HotSpot\u7684JIT\u7f16\u8bd1\u5668\u4e0e\u6df7\u5408\u7684\u8fd0\u884c\u65f6\u7cfb\u7edf\u3002 <\/p>\n<h4>Exact VM&#xff08;\u6682\u4e0d\u63d0&#xff09;<\/h4>\n<p>\u8fd9\u662f\u4e00\u6b3e\u88abHotSpot VM\u7ed9PK\u6389\u7684VM&#xff0c;\u4e0a\u9762\u8bb2\u5386\u53f2\u7684\u65f6\u5019\u8bb2\u8fc7\u3002\u5b83\u53ea\u5b58\u5728\u4e86\u5f88\u77ed\u6682\u7684\u65f6\u95f4&#xff0c;\u800c\u4e14\u53ea\u5728Solaris\u5e73\u53f0\u53d1\u5e03\u8fc7\u3002\u00a0<\/p>\n<h4>Sun 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