{"id":477196,"date":"2023-08-09T09:08:44","date_gmt":"2023-08-09T09:08:44","guid":{"rendered":""},"modified":"2023-09-05T11:14:15","modified_gmt":"2023-09-05T11:14:15","slug":"fcfs","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/fcfs\/","title":{"rendered":"\u5148\u671f\u5148\u5f97"},"content":{"rendered":"<p>\u5148\u6765\u5148\u670d\u52a1 (FCFS) \u662f\u4e00\u79cd\u57fa\u672c\u8c03\u5ea6\u7b97\u6cd5\uff0c\u7528\u4e8e\u5404\u79cd\u8ba1\u7b97\u673a\u7cfb\u7edf\u548c\u5e94\u7528\u7a0b\u5e8f\uff0c\u4ee5\u7ba1\u7406\u4efb\u52a1\u6216\u8fdb\u7a0b\u7684\u6267\u884c\u3002\u5b83\u9075\u5faa\u9996\u5148\u670d\u52a1\u961f\u5217\u4e2d\u6700\u8001\u7684\u4efb\u52a1\u7684\u539f\u5219\uff0c\u4f7f\u5176\u6210\u4e3a\u6700\u7b80\u5355\u3001\u6700\u76f4\u89c2\u7684\u8c03\u5ea6\u65b9\u6cd5\u4e4b\u4e00\u3002FCFS \u5e7f\u6cdb\u5e94\u7528\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u3001\u4efb\u52a1\u7ba1\u7406\u548c\u8d44\u6e90\u5206\u914d\uff0c\u5305\u62ec\u5b83\u4e0e\u4ee3\u7406\u670d\u52a1\u5668\u9886\u57df\u7684\u76f8\u5173\u6027\u3002\u672c\u6587\u5168\u9762\u4ecb\u7ecd\u4e86 FCFS\u3001\u5b83\u7684\u5386\u53f2\u3001\u5185\u90e8\u7ed3\u6784\u3001\u4e3b\u8981\u529f\u80fd\u3001\u7c7b\u578b\u3001\u7528\u4f8b\u4ee5\u53ca\u5b83\u4e0e OneProxy \u7b49\u4ee3\u7406\u670d\u52a1\u5668\u63d0\u4f9b\u5546\u7684\u5173\u7cfb\u3002<\/p>\n<h2>FCFS \u7684\u8d77\u6e90\u5386\u53f2\u53ca\u5176\u9996\u6b21\u63d0\u53ca<\/h2>\n<p>FCFS \u7684\u8d77\u6e90\u53ef\u4ee5\u8ffd\u6eaf\u5230\u8ba1\u7b97\u673a\u7cfb\u7edf\u548c\u64cd\u4f5c\u7cfb\u7edf\u5f00\u53d1\u7684\u65e9\u671f\u3002\u867d\u7136\u6ca1\u6709\u5177\u4f53\u7684\u65e5\u671f\u6216\u4eba\u7269\u4e0e\u5b83\u7684\u8bde\u751f\u6709\u5173\uff0c\u4f46\u6309\u4efb\u52a1\u5230\u8fbe\u7684\u987a\u5e8f\u63d0\u4f9b\u670d\u52a1\u7684\u6982\u5ff5\u53ef\u4ee5\u5728\u65e9\u671f\u7684\u624b\u52a8\u5904\u7406\u7cfb\u7edf\u4e2d\u770b\u5230\u3002\u968f\u7740\u8ba1\u7b97\u673a\u7684\u53d1\u5c55\u548c\u81ea\u52a8\u5316\u7a0b\u5ea6\u7684\u63d0\u9ad8\uff0c\u5bf9\u6b63\u5f0f\u8c03\u5ea6\u7b97\u6cd5\u7684\u9700\u6c42\u4e5f\u968f\u4e4b\u800c\u6765\u3002<\/p>\n<p>FCFS \u6700\u65e9\u51fa\u73b0\u5728 20 \u4e16\u7eaa 50 \u5e74\u4ee3\u548c 60 \u5e74\u4ee3\u7684\u6279\u5904\u7406\u7cfb\u7edf\u4e2d\u3002\u5728\u8fd9\u4e9b\u7cfb\u7edf\u4e2d\uff0c\u4f5c\u4e1a\u4ee5\u6279\u5904\u7406\u65b9\u5f0f\u63d0\u4ea4\u7ed9\u8ba1\u7b97\u673a\uff0c\u6bcf\u4e2a\u6279\u5904\u7406\u4e2d\u7684\u4efb\u52a1\u6839\u636e\u63d0\u4ea4\u987a\u5e8f\u4f9d\u6b21\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u6cd5\u6613\u4e8e\u5b9e\u73b0\u548c\u7406\u89e3\uff0c\u4f46\u4e5f\u6709\u5c40\u9650\u6027\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406\u957f\u65f6\u95f4\u8fd0\u884c\u6216\u65f6\u95f4\u654f\u611f\u7684\u4efb\u52a1\u65f6\u3002<\/p>\n<h2>\u6709\u5173 FCFS \u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u6269\u5c55 FCFS \u4e3b\u9898\u3002<\/h2>\n<p>FCFS \u662f\u4e00\u79cd\u975e\u62a2\u5360\u5f0f\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5373\u4e00\u65e6\u4efb\u52a1\u88ab\u5206\u914d\u5230 CPU\uff08\u4e2d\u592e\u5904\u7406\u5668\uff09\u6267\u884c\uff0c\u5b83\u5c06\u6301\u7eed\u8fd0\u884c\u76f4\u5230\u5b8c\u6210\uff0c\u6216\u8005\u4e3b\u52a8\u653e\u5f03 CPU\u3002\u5b83\u4e0d\u4f1a\u5728\u4efb\u52a1\u6267\u884c\u8fc7\u7a0b\u4e2d\u4e2d\u65ad\u4efb\u52a1\uff0c\u56e0\u6b64\u9002\u7528\u4e8e\u4e0d\u9700\u8981\u4efb\u52a1\u62a2\u5360\u7684\u573a\u666f\u3002<\/p>\n<p>FCFS \u4e2d\u4f7f\u7528\u7684\u4e3b\u8981\u6570\u636e\u7ed3\u6784\u662f\u961f\u5217\uff0c\u4efb\u52a1\u4ece\u961f\u5217\u7684\u540e\u9762\u8fdb\u5165\uff0c\u4ece\u961f\u5217\u7684\u524d\u9762\u9000\u51fa\u3002\u65b0\u4efb\u52a1\u5230\u8fbe\u65f6\uff0c\u5b83\u4eec\u4f1a\u88ab\u6392\u5728\u961f\u5217\u7684\u672b\u5c3e\uff0c\u800c\u961f\u5217\u524d\u9762\u7684\u4efb\u52a1\u5219\u7531 CPU \u5904\u7406\u3002\u5f53\u67d0\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u5b83\u4f1a\u4ece\u961f\u5217\u7684\u524d\u9762\u51fa\u961f\uff0c\u961f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u4efb\u52a1\u5c06\u6210\u4e3a\u5f53\u524d\u4efb\u52a1\u3002<\/p>\n<p>FCFS \u53ef\u80fd\u5bfc\u81f4\u201c\u62a4\u822a\u6548\u5e94\u201d\uff0c\u5373\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4efb\u52a1\u53ef\u80fd\u4f1a\u5ef6\u8fdf\u540e\u7eed\u4efb\u52a1\u7684\u6267\u884c\uff0c\u5373\u4f7f\u8fd9\u4e9b\u4efb\u52a1\u5f88\u77ed\u3002\u8fd9\u79cd\u73b0\u8c61\u4f1a\u5bfc\u81f4\u8d44\u6e90\u5229\u7528\u7387\u4f4e\u4e0b\uff0c\u5e76\u589e\u52a0\u4efb\u52a1\u7684\u5e73\u5747\u7b49\u5f85\u65f6\u95f4\u3002<\/p>\n<h2>FCFS \u7684\u5185\u90e8\u7ed3\u6784\u3002FCFS \u7684\u5de5\u4f5c\u539f\u7406\u3002<\/h2>\n<p>FCFS \u7684\u5185\u90e8\u7ed3\u6784\u56f4\u7ed5\u7b80\u5355\u7684\u961f\u5217\u6570\u636e\u7ed3\u6784\u3002\u6bcf\u5f53\u63d0\u4ea4\u4e00\u4e2a\u65b0\u4efb\u52a1\u65f6\uff0c\u5b83\u90fd\u4f1a\u88ab\u6dfb\u52a0\u5230\u961f\u5217\u7684\u672b\u5c3e\uff0c\u800c CPU \u4f1a\u6267\u884c\u961f\u5217\u524d\u9762\u7684\u4efb\u52a1\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u91cd\u590d\u8fdb\u884c\uff0c\u76f4\u5230\u6240\u6709\u4efb\u52a1\u90fd\u5b8c\u6210\u3002<\/p>\n<p>FCFS \u7b97\u6cd5\u7684\u4f2a\u4ee3\u7801\u8868\u793a\uff1a<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>sql<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>\u590d\u5236\u4ee3\u7801<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-sql\" data-no-translation=\"\"><span class=\"hljs-keyword\">function<\/span> FCFS_Schedule(tasks):\n    <span class=\"hljs-keyword\">create<\/span> an <span class=\"hljs-keyword\">empty<\/span> queue\n    <span class=\"hljs-keyword\">for<\/span> <span class=\"hljs-keyword\">each<\/span> task <span class=\"hljs-keyword\">in<\/span> tasks:\n        enqueue task <span class=\"hljs-keyword\">into<\/span> the queue\n    while the queue <span class=\"hljs-keyword\">is<\/span> <span class=\"hljs-keyword\">not<\/span> <span class=\"hljs-keyword\">empty<\/span>:\n        current_task <span class=\"hljs-operator\">=<\/span> dequeue the front task <span class=\"hljs-keyword\">from<\/span> the queue\n        <span class=\"hljs-keyword\">execute<\/span> current_task\n<\/code><\/div><\/div><\/pre>\n<h2>\u5206\u6790FCFS\u7684\u4e3b\u8981\u7279\u70b9\u3002<\/h2>\n<p>FCFS \u5177\u6709\u51e0\u4e2a\u5173\u952e\u7279\u6027\uff0c\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u7b80\u5355\uff1a<\/strong> FCFS \u6613\u4e8e\u5b9e\u73b0\u548c\u7406\u89e3\uff0c\u4f7f\u5176\u6210\u4e3a\u7b80\u5355\u7cfb\u7edf\u6216\u66f4\u590d\u6742\u8c03\u5ea6\u7b97\u6cd5\u7684\u8d77\u70b9\u7684\u70ed\u95e8\u9009\u62e9\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u975e\u62a2\u5360\u5f0f\uff1a<\/strong> FCFS \u4e0d\u4f1a\u62a2\u5360\u6b63\u5728\u8fd0\u884c\u7684\u4efb\u52a1\uff0c\u786e\u4fdd\u4e00\u65e6\u4efb\u52a1\u5f00\u59cb\u6267\u884c\uff0c\u5b83\u5c31\u4f1a\u4e00\u76f4\u6267\u884c\uff0c\u76f4\u5230\u5b8c\u6210\u6216\u76f4\u5230\u81ea\u613f\u653e\u5f03 CPU\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u516c\u5e73\uff1a<\/strong> \u7531\u4e8eFCFS\u9075\u5faa\u201c\u5148\u5230\u5148\u5f97\u201d\u7684\u539f\u5219\uff0c\u56e0\u6b64\u53ef\u4ee5\u4fdd\u8bc1\u4efb\u52a1\u6267\u884c\u987a\u5e8f\u7684\u516c\u5e73\u6027\u3002\u4efb\u52a1\u6309\u7167\u5230\u8fbe\u7684\u987a\u5e8f\u8fdb\u884c\u6267\u884c\uff0c\u4e0d\u533a\u5206\u4f18\u5148\u7ea7\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u957f\u671f\u4efb\u52a1\u7684\u5468\u8f6c\u65f6\u95f4\u8f83\u957f\uff1a<\/strong> \u62a4\u822a\u6548\u5e94\u53ef\u80fd\u5bfc\u81f4\u957f\u65f6\u95f4\u4efb\u52a1\u7684\u5468\u8f6c\u65f6\u95f4\u66f4\u957f\uff0c\u4ece\u800c\u5f71\u54cd\u6574\u4e2a\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>FCFS \u7684\u7c7b\u578b<\/h2>\n<p>FCFS \u8c03\u5ea6\u53ea\u6709\u4e00\u79cd\u53d8\u4f53\uff0c\u5373\u524d\u9762\u6240\u8ff0\u7684\u57fa\u672c\u975e\u62a2\u5360\u5f0f\u3002\u4f46\u662f\uff0c\u5f53\u4e0e\u5176\u4ed6\u8c03\u5ea6\u7b56\u7565\uff08\u4f8b\u5982\u57fa\u4e8e\u4f18\u5148\u7ea7\u7684\u8c03\u5ea6\uff09\u7ed3\u5408\u4f7f\u7528\u65f6\uff0c\u53ef\u4ee5\u770b\u5230 FCFS \u7684\u53d8\u4f53\u3002\u5728\u57fa\u4e8e\u4f18\u5148\u7ea7\u7684 FCFS \u4e2d\uff0c\u4f18\u5148\u7ea7\u76f8\u540c\u7684\u4efb\u52a1\u6309 FCFS \u987a\u5e8f\u6267\u884c\uff0c\u800c\u4f18\u5148\u7ea7\u4e0d\u540c\u7684\u4efb\u52a1\u5219\u6839\u636e\u5176\u4f18\u5148\u7ea7\u6267\u884c\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u57fa\u672c FCFS \u548c\u57fa\u4e8e\u4f18\u5148\u7ea7\u7684 FCFS \u7684\u6bd4\u8f83\u8868\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5148\u671f\u5148\u5f97<\/th>\n<th>\u57fa\u4e8e\u4f18\u5148\u7ea7\u7684 FCFS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u975e\u62a2\u5360\u5f0f<\/td>\n<td>\u975e\u62a2\u5360\u5f0f<\/td>\n<\/tr>\n<tr>\n<td>\u540c\u7b49\u4f18\u5148<\/td>\n<td>\u4e0d\u540c\u7684\u4f18\u5148\u4e8b\u9879<\/td>\n<\/tr>\n<tr>\n<td>\u7b80\u5355\u7684<\/td>\n<td>\u7b80\u5355\u7684<\/td>\n<\/tr>\n<tr>\n<td>\u62a4\u822a\u6548\u5e94<\/td>\n<td>\u62a4\u822a\u6548\u5e94<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>FCFS \u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6cd5\u3002<\/h2>\n<p>FCFS \u53ef\u5e94\u7528\u4e8e\u5404\u4e2a\u9886\u57df\uff0c\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u64cd\u4f5c\u7cfb\u7edf\uff1a<\/strong> \u65e9\u671f\u64cd\u4f5c\u7cfb\u7edf\u91c7\u7528 FCFS \u6765\u8c03\u5ea6\u6279\u5904\u7406\u7cfb\u7edf\u4e2d\u7684\u4efb\u52a1\u3002\u7136\u800c\uff0c\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u91c7\u7528\u66f4\u5148\u8fdb\u7684\u8c03\u5ea6\u7b97\u6cd5\u6765\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u4efb\u52a1\u7ba1\u7406\uff1a<\/strong> FCFS \u7528\u4e8e\u4efb\u52a1\u961f\u5217\uff0c\u5176\u4e2d\u4efb\u52a1\u6309\u7167\u6dfb\u52a0\u7684\u987a\u5e8f\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8d44\u6e90\u5206\u914d\uff1a<\/strong> FCFS \u7528\u4e8e\u516c\u5e73\u5206\u914d\u8d44\u6e90\u81f3\u5173\u91cd\u8981\u7684\u573a\u666f\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u786e\u4fdd\u4efb\u52a1\u7684\u6267\u884c\u6ca1\u6709\u4f18\u5148\u7ea7\u504f\u89c1\u3002<\/p>\n<\/li>\n<\/ol>\n<h3>\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848\uff1a<\/h3>\n<ol>\n<li>\n<p><strong>\u62a4\u822a\u6548\u679c\uff1a<\/strong> \u5982\u524d\u6240\u8ff0\uff0cFCFS \u53ef\u80fd\u5bfc\u81f4\u62a4\u822a\u6548\u5e94\uff0c\u5bfc\u81f4\u77ed\u4efb\u52a1\u5ef6\u8fdf\u3002\u89e3\u51b3\u6b64\u95ee\u9898\u7684\u4e00\u4e2a\u65b9\u6cd5\u662f\u4f7f\u7528\u8003\u8651\u4efb\u52a1\u4f18\u5148\u7ea7\u6216\u6267\u884c\u65f6\u95f4\u7684\u66f4\u9ad8\u7ea7\u8c03\u5ea6\u7b97\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u957f\u671f\u5de5\u4f5c\u5e72\u6270\uff1a<\/strong> \u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4efb\u52a1\u53ef\u80fd\u4f1a\u72ec\u5360 CPU\uff0c\u5f71\u54cd\u6574\u4e2a\u7cfb\u7edf\u7684\u54cd\u5e94\u80fd\u529b\u3002\u53ef\u4ee5\u901a\u8fc7\u5f15\u5165\u4efb\u52a1\u62a2\u5360\u6216\u4f7f\u7528\u5206\u65f6\u6280\u672f\u6765\u7f13\u89e3\u6b64\u95ee\u9898\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u4ee5\u8868\u683c\u548c\u5217\u8868\u7684\u5f62\u5f0f\u5217\u51fa\u4e3b\u8981\u7279\u5f81\u4ee5\u53ca\u4e0e\u7c7b\u4f3c\u672f\u8bed\u7684\u5176\u4ed6\u6bd4\u8f83\u3002<\/h2>\n<p>\u4ee5\u4e0b\u662f FCFS \u4e0e\u5176\u4ed6\u8c03\u5ea6\u7b97\u6cd5\u7684\u6bd4\u8f83\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5148\u671f\u5148\u5f97<\/th>\n<th>\u5faa\u73af\u8d5b<\/th>\n<th>\u6700\u77ed\u4f5c\u4e1a\u4f18\u5148 (SJF)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u975e\u62a2\u5360\u5f0f<\/td>\n<td>\u5148\u53d1\u5236\u4eba<\/td>\n<td>\u975e\u62a2\u5360\u5f0f<\/td>\n<\/tr>\n<tr>\n<td>\u7b80\u5355\u7684<\/td>\n<td>\u6bd4\u8f83\u7b80\u5355<\/td>\n<td>\u590d\u6742\u7684<\/td>\n<\/tr>\n<tr>\n<td>\u62a4\u822a\u6548\u5e94<\/td>\n<td>\u907f\u514d\u62a4\u822a\u6548\u5e94<\/td>\n<td>\u907f\u514d\u62a4\u822a\u6548\u5e94<\/td>\n<\/tr>\n<tr>\n<td>\u6ca1\u6709\u4f18\u5316<\/td>\n<td>\u65f6\u95f4\u91cf\u5b50\u4f18\u5316<\/td>\n<td>\u5e73\u5747\u65f6\u95f4\u6700\u4f18<\/td>\n<\/tr>\n<tr>\n<td>\u516c\u5e73\u6267\u884c<\/td>\n<td>\u5206\u65f6\u6280\u672f<\/td>\n<td>\u53ef\u80fd\u5bfc\u81f4\u9965\u997f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4e0e FCFS \u76f8\u5173\u7684\u672a\u6765\u89c2\u70b9\u548c\u6280\u672f\u3002<\/h2>\n<p>\u968f\u7740\u8ba1\u7b97\u7cfb\u7edf\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u53d1\u5c55\uff0c\u4eba\u4eec\u5f00\u53d1\u51fa\u4e86\u66f4\u590d\u6742\u7684\u8c03\u5ea6\u7b97\u6cd5\u6765\u89e3\u51b3 FCFS \u548c\u5176\u4ed6\u57fa\u672c\u7b97\u6cd5\u7684\u5c40\u9650\u6027\u3002\u8fd9\u4e9b\u8fdb\u6b65\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u591a\u7ea7\u961f\u5217\u8c03\u5ea6\uff1a<\/strong> \u6839\u636e\u4f18\u5148\u7ea7\u5c06\u4efb\u52a1\u5206\u6210\u5355\u72ec\u7684\u961f\u5217\uff0c\u5141\u8bb8\u6bcf\u4e2a\u961f\u5217\u4f7f\u7528\u4e0d\u540c\u7684\u8c03\u5ea6\u7b97\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u591a\u7ea7\u53cd\u9988\u961f\u5217\u8c03\u5ea6\uff1a<\/strong> \u5141\u8bb8\u4efb\u52a1\u6839\u636e\u5176\u884c\u4e3a\u5728\u4e0d\u540c\u7684\u961f\u5217\u4e4b\u95f4\u79fb\u52a8\uff0c\u4ee5\u9002\u5e94\u52a8\u6001\u5de5\u4f5c\u8d1f\u8f7d\u7684\u53d8\u5316\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5b9e\u65f6\u8c03\u5ea6\uff1a<\/strong> \u8c03\u5ea6\u7b97\u6cd5\u65e8\u5728\u6ee1\u8db3\u4e25\u683c\u7684\u65f6\u95f4\u7ea6\u675f\uff0c\u8fd9\u5bf9\u4e8e\u5b9e\u65f6\u5e94\u7528\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u57fa\u4e8e\u673a\u5668\u5b66\u4e60\u7684\u8c03\u5ea6\uff1a<\/strong> \u5229\u7528\u673a\u5668\u5b66\u4e60\u6280\u672f\u6839\u636e\u5386\u53f2\u6570\u636e\u548c\u7cfb\u7edf\u884c\u4e3a\u4f18\u5316\u4efb\u52a1\u8c03\u5ea6\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u5982\u4f55\u4f7f\u7528\u4ee3\u7406\u670d\u52a1\u5668\u6216\u5c06\u5176\u4e0e FCFS \u5173\u8054\u3002<\/h2>\n<p>\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u4ece FCFS \u4e2d\u83b7\u76ca\u826f\u591a\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\u3002\u901a\u8fc7\u5229\u7528 FCFS \u4f5c\u4e3a\u4f20\u5165\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u786e\u4fdd\u8bf7\u6c42\u6309\u5230\u8fbe\u7684\u987a\u5e8f\u8fdb\u884c\u5904\u7406\uff0c\u4ece\u800c\u516c\u5e73\u5bf9\u5f85\u6240\u6709\u5ba2\u6237\u7aef\u3002\u8fd9\u6709\u52a9\u4e8e\u9632\u6b62\u4efb\u4f55\u5355\u4e2a\u5ba2\u6237\u7aef\u72ec\u5360\u670d\u52a1\u5668\u8d44\u6e90\uff0c\u5e76\u786e\u4fdd\u5728\u5ba2\u6237\u7aef\u4e4b\u95f4\u5747\u8861\u5206\u914d\u5904\u7406\u80fd\u529b\u3002<\/p>\n<h2>\u76f8\u5173\u94fe\u63a5<\/h2>\n<p>\u6709\u5173 FCFS \u548c\u8c03\u5ea6\u7b97\u6cd5\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u4ee5\u4e0b\u8d44\u6e90\uff1a<\/p>\n<ol>\n<li><a href=\"https:\/\/www.os-book.com\/OS10\/slide-dir\/index.html#slides\/sched-1\/sld024.htm\" target=\"_new\" rel=\"noopener nofollow\">\u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5 \u2013 FCFS \u8c03\u5ea6<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Multilevel_feedback_queue\" target=\"_new\" rel=\"noopener nofollow\">\u591a\u7ea7\u53cd\u9988\u961f\u5217\u8c03\u5ea6<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Real-time_scheduling\" target=\"_new\" rel=\"noopener nofollow\">\u5b9e\u65f6\u8c03\u5ea6<\/a><\/li>\n<li><a href=\"https:\/\/ieeexplore.ieee.org\/abstract\/document\/9150162\" target=\"_new\" rel=\"noopener nofollow\">\u673a\u5668\u5b66\u4e60\u4efb\u52a1\u8c03\u5ea6<\/a><\/li>\n<\/ol>\n<p>\u968f\u7740\u6280\u672f\u7684\u4e0d\u65ad\u53d1\u5c55\uff0c\u8c03\u5ea6\u7b97\u6cd5\u4ecd\u5c06\u662f\u4f18\u5316\u7cfb\u7edf\u6027\u80fd\u548c\u8d44\u6e90\u5206\u914d\u7684\u5173\u952e\u65b9\u9762\u3002FCFS \u51ed\u501f\u5176\u7b80\u5355\u6027\u548c\u516c\u5e73\u6027\uff0c\u5c06\u7ee7\u7eed\u5728\u5404\u79cd\u8ba1\u7b97\u9886\u57df\uff08\u5305\u62ec\u4ee3\u7406\u670d\u52a1\u5668\u7ba1\u7406\u7b49\uff09\u4e2d\u53d1\u6325\u91cd\u8981\u4f5c\u7528\u3002<\/p>","protected":false},"featured_media":477197,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477196","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>FCFS (First-Come, First-Serve) Scheduling: An In-depth Guide<\/mark>","faq_items":[{"question":"What is FCFS (First-Come, First-Serve) Scheduling?","answer":"<p>FCFS (First-Come, First-Serve) Scheduling is a fundamental task scheduling algorithm used in computer systems and applications. It serves tasks in the order they arrive, following a simple \"first-come, first-serve\" principle.<\/p>"},{"question":"What is the history of FCFS?","answer":"<p>The origins of FCFS can be traced back to the early days of computer systems. While there is no specific date or person associated with its inception, it was used in batch processing systems in the 1950s and 1960s. These systems processed tasks in the order of submission, forming the basis of FCFS.<\/p>"},{"question":"How does FCFS work internally?","answer":"<p>FCFS utilizes a queue data structure. As tasks arrive, they are added to the back of the queue. The CPU executes the task at the front of the queue. Once a task is completed, it is removed from the front, and the next task in line gets processed.<\/p>"},{"question":"What are the key features of FCFS?","answer":"<p>FCFS is simple, non-preemptive, and fair. It is easy to implement and understand, does not interrupt running tasks, and ensures equal treatment for all tasks in the queue.<\/p>"},{"question":"Are there different types of FCFS?","answer":"<p>While there is only one basic FCFS scheduling algorithm, variations can be seen when combined with other policies. For example, in priority-based FCFS, tasks with the same priority are served in FCFS order, while tasks with different priorities follow their priority levels.<\/p>"},{"question":"What are the uses of FCFS?","answer":"<p>FCFS finds applications in operating systems, task management, and resource allocation. It ensures fair distribution of resources and is useful in scenarios where task preemption is not required.<\/p>"},{"question":"What are the common issues with FCFS?","answer":"<p>FCFS can lead to the \"convoy effect,\" where long-running tasks delay shorter ones. To address this, more advanced scheduling algorithms can be used that consider task priorities or execution times.<\/p>"},{"question":"How does FCFS compare to other scheduling algorithms?","answer":"<p>Compared to Round Robin and Shortest Job First (SJF) algorithms, FCFS is non-preemptive, simple, and ensures fair execution. However, it may not be optimized for average time compared to SJF.<\/p>"},{"question":"How does FCFS relate to proxy servers?","answer":"<p>FCFS can be employed in proxy servers to process client requests in the order they arrive, ensuring fair treatment and resource allocation among clients.<\/p>"},{"question":"What does the future hold for FCFS and related technologies?","answer":"<p>As technology evolves, more advanced scheduling algorithms, like multilevel queue and real-time scheduling, will continue to be developed. Machine learning-based scheduling may also play a significant role in optimizing task scheduling in the future.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/477196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/477196\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media\/477197"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=477196"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}