{"id":72,"date":"2023-12-02T17:48:47","date_gmt":"2023-12-02T09:48:47","guid":{"rendered":"https:\/\/blog.zwdblog.online\/?p=72"},"modified":"2023-12-11T21:22:10","modified_gmt":"2023-12-11T13:22:10","slug":"%e7%9f%ad%e8%bf%9b%e7%a8%8b%e4%bc%98%e5%85%88%e8%b0%83%e5%ba%a6%e7%ae%97%e6%b3%95%ef%bc%88spf%ef%bc%89%e5%92%8c%e6%97%b6%e9%97%b4%e7%89%87%e8%bd%ae%e8%bd%ac%e8%b0%83%e5%ba%a6%e7%ae%97%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blog.zwdblog.online\/index.php\/2023\/12\/02\/%e7%9f%ad%e8%bf%9b%e7%a8%8b%e4%bc%98%e5%85%88%e8%b0%83%e5%ba%a6%e7%ae%97%e6%b3%95%ef%bc%88spf%ef%bc%89%e5%92%8c%e6%97%b6%e9%97%b4%e7%89%87%e8%bd%ae%e8%bd%ac%e8%b0%83%e5%ba%a6%e7%ae%97%e6%b3%95\/","title":{"rendered":"\u77ed\u8fdb\u7a0b\u4f18\u5148\u8c03\u5ea6\u7b97\u6cd5\uff08SPF\uff09\u548c\u65f6\u95f4\u7247\u8f6e\u8f6c\u8c03\u5ea6\u7b97\u6cd5\uff08RR\uff09"},"content":{"rendered":"\n<p 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class=\"wp-block-list\">\n<li><strong>\u7b49\u5f85\u65f6\u95f4\u957f<\/strong>\uff1a\u5bf9\u4e8e\u957f\u65f6\u95f4\u7684\u4efb\u52a1\uff0c\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u8f83\u957f\u65f6\u95f4\u624d\u80fd\u6267\u884c\u5b8c\u6bd5\uff0c\u56e0\u4e3a\u5b83\u4eec\u9700\u8981\u591a\u6b21\u5207\u7247\u624d\u80fd\u5b8c\u6210\u3002<\/li>\n\n\n\n<li><strong>\u54cd\u5e94\u65f6\u95f4\u4e0d\u786e\u5b9a<\/strong>\uff1a\u65e0\u6cd5\u4fdd\u8bc1\u5bf9\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u54cd\u5e94\u65f6\u95f4\uff0c\u6709\u53ef\u80fd\u4f1a\u6709\u957f\u65f6\u95f4\u7684\u7b49\u5f85\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u3001\u5b9a\u4e49PCB\u6a21\u5757<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"font-size:18px\"><code>class Status(Enum):\n    running = 1\n    ready = 2\n    blocked = 3\n\nclass PCB:\n    def __init__(self, pid, arrival_time, total_time, block_time=0):\n        self.id = pid\n        self.arrival_time = arrival_time\n        self.total_time = total_time\n        self.remaining_time = total_time\n        self.block_time = block_time\n        self.state = Status.ready\n        self.next = None<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u56db\u3001\u8fdb\u7a0b\u5217\u8868\u7684\u521d\u59cb\u5316<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"font-size:18px\"><code>#\u8c03\u7528PCB\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\nprocesses = &#91;\n    PCB(1, 0, 10),\n    PCB(2, 1, 4),\n    PCB(3, 2, 5),\n    PCB(4, 3, 3),\n    PCB(5, 4, 8)\n]<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u6b64\u53ef\u89c1\uff0c\u521d\u59cb\u5316\u4e86\u4e94\u4e2a\u8fdb\u7a0b\u5e8f\u5217\uff0c\u4ece\u5de6\u81f3\u53f3\u5206\u522b\u662f\u8fdb\u7a0b\u5e8f\u53f7\uff0c\u8fdb\u7a0b\u5230\u8fbe\u65f6\u95f4\uff0c\u8fdb\u7a0b\u9700\u8981\u6267\u884c\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e94\u3001\u8fd0\u884c\u7ed3\u679c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff081\uff09SPF\u7b97\u6cd5\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"365\" height=\"381\" src=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image.png\" alt=\"\" class=\"wp-image-73\" style=\"width:412px;height:auto\" srcset=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image.png 365w, https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-287x300.png 287w\" sizes=\"auto, (max-width: 365px) 100vw, 365px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6700\u77ed\u8fdb\u7a0b\u4f18\u5148\u7b97\u6cd5\uff08SPF\uff09\u4e2d\uff0c\u6bcf\u6b21\u9009\u62e9\u5f53\u524d\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\u6765\u6267\u884c\u3002\u5728\u4e0a\u8ff0\u8fd0\u884c\u7ed3\u679c\u4e2d\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8fdb\u7a0b\u6267\u884c\u8fc7\u7a0b<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fdb\u7a0b 4 \u662f\u9996\u5148\u5230\u8fbe\u7684\uff0c\u5728\u65f6\u95f4 3 \u5f00\u59cb\u6267\u884c\uff0c\u56e0\u4e3a\u5b83\u603b\u65f6\u95f4\u6700\u77ed\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u5728\u65f6\u95f4 6 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 2 \u5728\u65f6\u95f4 6 \u5f00\u59cb\u6267\u884c\uff0c\u56e0\u4e3a\u6b64\u65f6\u5b83\u662f\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u5728\u65f6\u95f4 10 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 3 \u5728\u65f6\u95f4 10 \u5f00\u59cb\u6267\u884c\uff0c\u56e0\u4e3a\u6b64\u65f6\u5b83\u662f\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u5728\u65f6\u95f4 15 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 5 \u5728\u65f6\u95f4 15 \u5f00\u59cb\u6267\u884c\uff0c\u56e0\u4e3a\u6b64\u65f6\u5b83\u662f\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u5728\u65f6\u95f4 23 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 1 \u5728\u65f6\u95f4 23 \u5f00\u59cb\u6267\u884c\uff0c\u56e0\u4e3a\u6b64\u65f6\u5b83\u662f\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u5728\u65f6\u95f4 33 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8fdb\u7a0b\u6267\u884c\u5b8c\u6210\u65f6\u95f4<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fdb\u7a0b 1 \u5728\u65f6\u95f4 33 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 2 \u5728\u65f6\u95f4 10 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 3 \u5728\u65f6\u95f4 15 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 4 \u5728\u65f6\u95f4 6 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u8fdb\u7a0b 5 \u5728\u65f6\u95f4 23 \u5b8c\u6210\u6267\u884c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">SPF \u7b97\u6cd5\u5728\u6bcf\u4e2a\u65f6\u95f4\u70b9\u9009\u62e9\u5269\u4f59\u65f6\u95f4\u6700\u77ed\u7684\u8fdb\u7a0b\u6267\u884c\uff0c\u8fd9\u6837\u4fdd\u8bc1\u4e86\u66f4\u77ed\u4efb\u52a1\u80fd\u66f4\u65e9\u5b8c\u6210\uff0c\u4f46\u4e5f\u53ef\u80fd\u5bfc\u81f4\u957f\u4efb\u52a1\u7b49\u5f85\u65f6\u95f4\u589e\u52a0\u3002\u56e0\u6b64\uff0c\u867d\u7136\u67d0\u4e9b\u8fdb\u7a0b\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u8f83\u957f\u65f6\u95f4\u624d\u80fd\u6267\u884c\uff0c\u4f46\u77ed\u4efb\u52a1\u7684\u6267\u884c\u901f\u5ea6\u8f83\u5feb\uff0c\u8fd9\u662f\u6700\u77ed\u8fdb\u7a0b\u4f18\u5148\u7b97\u6cd5\u7684\u7279\u70b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uff082\uff09RR\u7b97\u6cd5<\/p>\n\n\n\n<div class=\"wp-block-group is-content-justification-center is-nowrap is-layout-flex wp-container-core-group-is-layout-d05cb3ef wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"341\" src=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/\u5fae\u4fe1\u56fe\u7247_20231202173914.png\" alt=\"\" class=\"wp-image-76\" style=\"width:311px;height:auto\" srcset=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/\u5fae\u4fe1\u56fe\u7247_20231202173914.png 273w, https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/\u5fae\u4fe1\u56fe\u7247_20231202173914-240x300.png 240w\" sizes=\"auto, (max-width: 273px) 100vw, 273px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"269\" height=\"344\" src=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-3.png\" alt=\"\" class=\"wp-image-77\" style=\"width:307px;height:auto\" srcset=\"https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-3.png 269w, https:\/\/blog.zwdblog.online\/wp-content\/uploads\/2023\/12\/image-3-235x300.png 235w\" sizes=\"auto, (max-width: 269px) 100vw, 269px\" \/><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0a\u8ff0\u65f6\u95f4\u7247\u8f6e\u8f6c\u7b97\u6cd5\uff08RR\uff09\u7684\u8fd0\u884c\u7ed3\u679c\u4e2d\uff0c\u8f6e\u8f6c\u8fc7\u7a0b\u662f\u4e00\u76f4\u6301\u7eed\uff0c\u76f4\u5230\u6240\u6709\u8fdb\u7a0b\u90fd\u5b8c\u6210\u6267\u884c\u3002\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6309\u7167\u65f6\u95f4\u7247\u5927\u5c0f\uff081\u4e2a\u65f6\u95f4\u7247\uff09\u6267\u884c\uff0c\u76f4\u5230\u5b8c\u6210\uff0c\u6216\u8005\u5728\u65f6\u95f4\u7247\u5185\u65e0\u6cd5\u5b8c\u6210\u65f6\u8ba9\u51fa CPU \u7ed9\u4e0b\u4e00\u4e2a\u8fdb\u7a0b\u3002\u5b83\u6267\u884c\u7684\u8fc7\u7a0b\u4e0e\u9884\u671f\u7b26\u5408\uff0c\u56e0\u6b64\u8bc1\u660e\u7a0b\u5e8f\u6b63\u786e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u516d\u3001\u9644\u5168\u90e8\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\" style=\"font-size:18px\"><code>from enum import Enum\n\nclass Status(Enum):\n    running = 1\n    ready = 2\n    blocked = 3\n\nclass PCB:\n    def __init__(self, pid, arrival_time, total_time, block_time=0):\n        self.id = pid\n        self.arrival_time = arrival_time\n        self.total_time = total_time\n        self.remaining_time = total_time\n        self.block_time = block_time\n        self.state = Status.ready\n        self.next = None\n\ndef round_robin_scheduler(processes, time_slice):\n    current_time = 0  # \u5f53\u524d\u65f6\u95f4\u521d\u59cb\u5316\u4e3a0\n    completed_processes = &#91;]  # \u5b58\u50a8\u5df2\u5b8c\u6210\u7684\u8fdb\u7a0b\u4fe1\u606f\n\n    # \u5f53\u8fdb\u7a0b\u5217\u8868\u975e\u7a7a\u65f6\uff0c\u6267\u884c\u8c03\u5ea6\n    while processes:\n        for process in processes:  # \u5bf9\u4e8e\u6bcf\u4e2a\u8fdb\u7a0b\n            # \u68c0\u67e5\u8fdb\u7a0b\u662f\u5426\u53ef\u4ee5\u6267\u884c\n            if process.arrival_time &lt;= current_time and process.state != Status.blocked:\n                if process.remaining_time &lt;= time_slice:  # \u5982\u679c\u8fdb\u7a0b\u5269\u4f59\u65f6\u95f4\u5c0f\u4e8e\u7b49\u4e8e\u65f6\u95f4\u7247\n                    current_time += process.remaining_time  # \u66f4\u65b0\u5f53\u524d\u65f6\u95f4\n                    process.remaining_time = 0  # \u8fdb\u7a0b\u5269\u4f59\u65f6\u95f4\u7f6e\u4e3a0\uff0c\u8868\u793a\u6267\u884c\u5b8c\u6210\n                    process.state = Status.blocked  # \u8fdb\u7a0b\u72b6\u6001\u8bbe\u7f6e\u4e3a\u963b\u585e\n                    completed_processes.append((process.id, current_time))  # \u5c06\u5b8c\u6210\u7684\u8fdb\u7a0b\u4fe1\u606f\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\n                    print(f\"\u8fdb\u7a0b {process.id} \u5728\u65f6\u95f4 {current_time} \u6267\u884c\u5b8c\u6210\")  # \u8f93\u51fa\u8fdb\u7a0b\u6267\u884c\u5b8c\u6210\u4fe1\u606f\n                    processes.remove(process)  # \u4ece\u8fdb\u7a0b\u5217\u8868\u4e2d\u79fb\u9664\u8be5\u8fdb\u7a0b\n                else:\n                    current_time += time_slice  # \u66f4\u65b0\u5f53\u524d\u65f6\u95f4\u4e3a\u4e00\u4e2a\u65f6\u95f4\u7247\n                    process.remaining_time -= time_slice  # \u51cf\u53bb\u6267\u884c\u7684\u65f6\u95f4\u7247\n                    process.state = Status.ready  # \u8fdb\u7a0b\u72b6\u6001\u8bbe\u7f6e\u4e3a\u5c31\u7eea\n                    print(f\"\u8fdb\u7a0b {process.id} \u5728\u65f6\u95f4 {current_time} \u6267\u884c\")  # \u8f93\u51fa\u8fdb\u7a0b\u6267\u884c\u4fe1\u606f\n\n    return completed_processes  # \u8fd4\u56de\u5b8c\u6210\u6267\u884c\u7684\u8fdb\u7a0b\u4fe1\u606f\u5217\u8868\n\n\ndef spf_scheduler(processes):\n    current_time = 0\n    completed_processes = &#91;]\n\n    while processes:\n        shortest_process = min(processes, key=lambda x: x.total_time)\n        current_process = shortest_process\n\n        if current_process.arrival_time &gt; current_time:\n            current_time = current_process.arrival_time\n\n        current_process.state = Status.running\n        print(f\"\u8fdb\u7a0b {current_process.id} \u5728\u65f6\u95f4 {current_time} \u6267\u884c\")\n        current_time += current_process.total_time\n        current_process.remaining_time = 0\n        completed_processes.append((current_process.id, current_time))\n        print(f\"\u8fdb\u7a0b {current_process.id} \u5728\u65f6\u95f4 {current_time} \u6267\u884c\u5b8c\u6bd5\")\n        processes.remove(current_process)\n\n    return completed_processes\n\nprocesses = &#91;\n    PCB(1, 0, 10),\n    PCB(2, 1, 4),\n    PCB(3, 2, 5),\n    PCB(4, 3, 3),\n    PCB(5, 4, 8)\n]\n\nprint(\"\u4e94\u4e2a\u8fdb\u7a0b\u5e8f\u5217\u5206\u522b\u4e3a\uff1a\")\nfor process in processes:\n    print(f\"\u8fdb\u7a0b\u5e8f\u53f7: {process.id}, \u5230\u8fbe\u65f6\u95f4: {process.arrival_time}, \u603b\u65f6\u95f4: {process.total_time}\")\n\nprint(\"\u8bf7\u9009\u62e9\u9009\u7528\u4f55\u79cd\u7b97\u6cd5\uff1a1\u3001SPF  2\u3001RR\")\n\na = input()\nif int(a) == 1:\n    result = spf_scheduler(processes)\n    result.sort(key=lambda x: x&#91;0])  # \u6309\u7167\u8fdb\u7a0bID\u6392\u5e8f\n    \n    print(\"\\n\")\n    print(\"\u8fdb\u7a0b\u6267\u884c\u5b8c\u6210\u65f6\u95f4\u5206\u522b\u4e3a:\")\n    for process_id, execution_time in result:\n        print(f\"\u8fdb\u7a0b {process_id} \u6267\u884c\u5b8c\u6210\u65f6\u95f4 {execution_time}\")\n\nif int(a) == 2:\n    time_slice = 1\n    result = round_robin_scheduler(processes, time_slice)\n    result.sort(key=lambda x: x&#91;0])  # \u6309\u7167\u8fdb\u7a0bID\u6392\u5e8f\n\n    print(\"\\n\")\n    print(\"\u8fdb\u7a0b\u6267\u884c\u5b8c\u6210\u65f6\u95f4\u5206\u522b\u4e3a:\")\n    for process_id, execution_time in result:\n        print(f\"\u8fdb\u7a0b {process_id} \u6267\u884c\u5b8c\u6210\u65f6\u95f4 {execution_time}\")\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u5185\u5bb9\uff081\uff09\u8fdb\u7a0b\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u8fdb\u7a0b\u63a7\u5236\u5757\u7684\u6570\u636e\u7ed3\u6784\uff08PCB\uff09 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":210,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-72","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2"],"_links":{"self":[{"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/posts\/72","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/comments?post=72"}],"version-history":[{"count":0,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/posts\/72\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/media\/210"}],"wp:attachment":[{"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/media?parent=72"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/categories?post=72"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.zwdblog.online\/index.php\/wp-json\/wp\/v2\/tags?post=72"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}