{"id":5549,"date":"2025-01-02T16:46:40","date_gmt":"2025-01-02T08:46:40","guid":{"rendered":"http:\/\/www.wangkaixuan.tech\/?p=5549"},"modified":"2025-01-10T10:22:06","modified_gmt":"2025-01-10T02:22:06","slug":"linux%e6%97%b6%e9%92%9f%e7%b3%bb%e5%88%97-01-%e7%b3%bb%e7%bb%9f%e6%97%b6%e9%92%9f%e6%bc%82%e7%a7%bb%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/www.wangkaixuan.tech\/?p=5549","title":{"rendered":"Linux\u65f6\u949f\u7cfb\u5217-01-\u7cfb\u7edf\u65f6\u949f\u6f02\u79fb\u95ee\u9898"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1.\u524d\u8a00<\/h1>\n\n\n\n<p>\u6700\u8fd1\u78b0\u5230\u4e86\u4e00\u4e2a\u670d\u52a1\u5668\u65f6\u95f4\u6f02\u79fb\u7684\u95ee\u9898\uff0c\u4e00\u53f0Linux\u670d\u52a1\u5668\u8fd0\u884c12\u5c0f\u65f6\u540e\uff0c\u7cfb\u7edf\u65f6\u949f\u6f02\u79fb\u4e86700\u591ams\uff0c\u800c\u4e14\u5728\u673a\u5668\u8d1f\u8f7d\u4e0d\u540c\u7684\u65f6\u5019\uff0c\u6f02\u79fb\u7a0b\u5ea6\u8fd8\u4e0d\u4e00\u6837\u3002<\/p>\n\n\n\n<p>\u5176\u5b9e\u78b0\u89c1\u8fd9\u4e2a\u95ee\u9898\u5df2\u7ecf\u597d\u591a\u597d\u591a\u5e74\u4e86\uff0c\u53ea\u4e0d\u8fc7\u6ca1\u6709\u65f6\u95f4\u6df1\u7a76\uff0c\u6b63\u597d\u6700\u8fd1\u5f97\u7a7a\u7814\u7a76\u4e0b\uff0c\u6574\u7406\u51e0\u7bc7\u6587\u7ae0\u51fa\u6765\u3002<\/p>\n\n\n\n<p>\u4e8b\u5148\u58f0\u660e\uff1a\u7531\u4e8e\u672c\u4eba\u5e76\u975e\u4e13\u4e1a\u786c\u4ef6\u5de5\u7a0b\u5e08\uff0c\u6709\u4e9b\u8868\u8ff0\u53ef\u80fd\u6bd4\u8f83\u6d45\u663e\u6216\u8005\u4e0d\u591f\u51c6\u786e\uff0c\u5bf9\u4e8e\u6b64\u7c7b\u4fe1\u606f\u6211\u4f1a\u5c3d\u91cf\u6ce8\u660e\u4fe1\u606f\u6765\u6e90\u4f9b\u53c2\u8003\uff0c\u9632\u6b62\u8bef\u5bfc\u8bfb\u8005\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\uff0c\u53c2\u8003\u8d44\u6599\u90e8\u5206\u7684\u51e0\u4e2a\u89c6\u9891\uff0c\u8d28\u91cf\u90fd\u5f88\u9ad8\uff0c\u5f3a\u70c8\u5efa\u8bae\u89c2\u770b\u5b66\u4e60\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2.\u57fa\u7840\u6982\u5ff5<\/h1>\n\n\n\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6709\u4e24\u79cd\u201c\u65e5\u671f-\u65f6\u95f4\u201d\u65f6\u949f\uff0c\u5373\u786c\u4ef6\u65f6\u949f\u548c\u7cfb\u7edf\u65f6\u949f\u3002\u8fd9\u91cc\u6240\u8ba8\u8bba\u7684\u65f6\u949f\u6982\u5ff5\uff0c\u4ec5\u8868\u793a\u201c\u65e5\u671f-\u65f6\u95f4\u201d\u65f6\u949f\uff0c\u5373\u7528\u4e8e\u4fdd\u5b58\u548c\u7ef4\u6301\u7cfb\u7edf\u7684\u65e5\u671f-\u65f6\u95f4\u6b63\u5e38\u6d41\u901d\u7684\u65f6\u949f\uff08Clock\uff09\uff0c\u800c\u975e\u7cfb\u7edf\u5b9a\u65f6\u5668\uff08Timer\uff09\u3001\u8ba1\u6570\u5668\uff08Counter\uff09\u7b49\u6982\u5ff5\uff0c\u8bf7\u6ce8\u610f\u533a\u5206\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 \u786c\u4ef6\u65f6\u949f\uff08Hardware Clock\uff09<\/h2>\n\n\n\n<p>\u786c\u4ef6\u65f6\u949f\u662f\u4e00\u4e2a\u72ec\u7acb\u4e8eCPU\u7b49\u5176\u4ed6\u8ba1\u7b97\u673a\u90e8\u4ef6\u7684\u786c\u4ef6\u8bbe\u5907\uff0c\u4e00\u822c\u91c7\u7528\u7ebd\u6263\u7535\u6c60\u4f9b\u7535\uff08CR2032\uff0c\u80fd\u752810\u5e74\u5de6\u53f3\uff09\uff0c\u80fd\u5728\u670d\u52a1\u5668\u4e0b\u7535\u540e\u6b63\u5e38\u7ef4\u6301\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u66f4\u65b0\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1982\" height=\"1438\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2025\/01\/WechatIMG1114.jpg\" alt=\"\" class=\"wp-image-5589\"\/><\/figure>\n\n\n\n<p>\u8fd9\u4e2a\u8bbe\u5907\u9664\u4e86\u88ab\u53eb\u505a\u786c\u4ef6\u65f6\u949f\uff08Hardware Clock\uff09\u5916\uff0c\u8fd8\u53ef\u80fd\u88ab\u53eb\u505aReal Time Clock\uff08RTC\uff09\u3001BIOS Clock\u3001CMOS Clock\uff0c\u90fd\u662f\u4e00\u4e2a\u610f\u601d\u3002RTC\u662f\u5b83\u7684\u6b63\u5f0f\u540d\u5b57\uff0c\u53ebBIOS Clock\u548cCMOS Clock\u662f\u56e0\u4e3aRTC\u548cBIOS\u7684CMOS\u90fd\u9700\u8981\u5728\u5173\u673a\u65f6\u4fdd\u6301\u4f9b\u7535\uff0c\u524d\u8005\u7528\u4e8e\u4fdd\u6301\u65f6\u95f4\u6d41\u901d\uff0c\u540e\u8005\u7528\u4e8e\u4fdd\u5b58\u4e00\u4e9bBIOS\u8bbe\u7f6e\u4fe1\u606f\uff0c\u6240\u4ee5\u4e00\u822c\u4f1a\u653e\u5728\u4e00\u8d77\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2414\" height=\"184\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2025\/01\/image-1.png\" alt=\"\" class=\"wp-image-5586\"\/><\/figure>\n\n\n\n<p>Linux\u4e00\u822c\u4ec5\u5728\u542f\u52a8\u65f6\u4e0e\u786c\u4ef6\u65f6\u949f\u901a\u4fe1\uff0c\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u65f6\u95f4\u7528\u4e8e\u521d\u59cb\u5316\u64cd\u4f5c\u7cfb\u7edf\u65f6\u95f4\uff0cLinux\u542f\u52a8\u6210\u529f\u540e\uff0c\u5c31\u6309\u7167\u81ea\u5df1\u7684\u903b\u8f91\u7ef4\u6301\u65f6\u95f4\u6d41\u901d\u4e86\uff0c\u4e0d\u518d\u4e0e\u4e0a\u8ff0\u786c\u4ef6\u65f6\u949f\u901a\u4fe1\u4e86\u3002<\/p>\n\n\n\n<p>\u5728Linux\u7cfb\u7edf\u4e0b\uff0c\u4f7f\u7528hwclock\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u786c\u4ef6\u65f6\u949f\u7684\u5f53\u524d\u65f6\u95f4\uff08\u9700\u8981root\u6743\u9650\uff09\uff1a <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"467\" height=\"35\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2024\/12\/10291735628655_.pic_.jpg\" alt=\"\" class=\"wp-image-5552\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1154\" height=\"96\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2024\/12\/image-18.png\" alt=\"\" class=\"wp-image-5553\" style=\"width:469px;height:auto\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 \u7cfb\u7edf\u65f6\u949f\uff08System Clock\uff09<\/h2>\n\n\n\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u7cfb\u7edf\u65f6\u949f\u662f\u6307\u7531\u5b9a\u65f6\u5668\u4e2d\u65ad\u9a71\u52a8\u66f4\u65b0\u7684\u65f6\u949f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2.1 \u65f6\u949f\u6e90<\/h3>\n\n\n\n<p>\u4ea7\u751f\u5b9a\u65f6\u5668\u4e2d\u65ad\u7684\u786c\u4ef6\uff0c\u53eb\u505a\u65f6\u949f\u6e90\uff08Clock Source\uff09\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u7cfb\u7edf\u7684\u53ef\u7528\u65f6\u949f\u6e90\u4ee5\u53ca\u5f53\u524d\u6b63\u5728\u4f7f\u7528\u7684\u65f6\u949f\u6e90\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"784\" height=\"73\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2024\/12\/10311735633902_.pic_.png\" alt=\"\" class=\"wp-image-5558\"\/><\/figure>\n\n\n\n<p>Linux\u4f1a\u5728\u542f\u52a8\u540e\u81ea\u52a8\u9009\u62e9\u65f6\u949f\u6e90\uff0c\u9009\u62e9\u4f18\u5148\u7ea7\u662fTSC\uff08Time Stamp Counter\uff09 &gt; HPET\uff08High Precision Event Timer\uff09 &gt; ACPI_PM\uff08ACPI Power Management Timer\uff09 &gt; PIT\uff08Programmable Interval Timer\uff09 &gt; RTC\uff08Real Time Clock\uff09\u3002<\/p>\n\n\n\n<p>\u5173\u4e8eTSC\uff1a\u6240\u6709\u7684x86\u5904\u7406\u5668\u90fd\u5305\u542b\u4e86\u4e00\u4e2aCLK\u8f93\u5165\u9488\u811a\uff0c\u53ef\u4ee5\u63a5\u6536\u5916\u90e8\u632f\u8361\u5668\u7684\u65f6\u949f\u4fe1\u53f7\u3002\u4ecePentium\uff08\u5954\u817e\uff09\u5f00\u59cb\uff0cx86\u5904\u7406\u5668\u5f15\u5165\u4e86\u4e00\u4e2a\u8ba1\u6570\u5668\uff0c\u8fd9\u4e2a\u8ba1\u6570\u5668\u6bcf\u6536\u5230\u4e00\u4e2aCLK\u4fe1\u53f7\u5c31\u589e\u52a01\uff0c\u6700\u65b0\u503c\u5b58\u653e\u4e8eTSC\u5bc4\u5b58\u5668\u4e2d\uff0c\u53ef\u901a\u8fc7rdtsc\u6c47\u7f16\u6307\u4ee4\u8bfb\u53d6\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5bf9\u4e8e\u4e00\u4e2a3.5GHz\u7684CPU\u800c\u8a00\uff0c\u5176CLK\u4fe1\u53f7\u6bcf\u79d2\u53ef\u89e6\u53d135\u4ebf\u6b21\uff0c\u90a3\u4e48\u7406\u8bba\u4e0a\uff0c\u57fa\u4e8eTSC\u7684\u8ba1\u65f6\u7cbe\u5ea6\u53ef\u8fbe0.2857ns\u3002<\/p>\n\n\n\n<p>\u5173\u4e8ePIT\uff1aPIT\u987e\u540d\u601d\u4e49\u662f\u4e00\u79cd\u53ef\u7f16\u7a0b\u7684\uff0c\u6309\u7167\u56fa\u5b9a\u9891\u7387\uff08\u53ef\u7531\u5185\u6838\u6307\u5b9a\uff09\u4ea7\u751f\u5b9a\u65f6\u5668\u4e2d\u65ad\u7684\u82af\u7247\uff0c\u8be5\u5b9a\u65f6\u5668\u4e2d\u65ad\u53ef\u88ab\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u6355\u83b7\u5e76\u5904\u7406\uff0c\u7528\u4e8e\u9a71\u52a8\u5185\u6838\u505a\u4e00\u4e9b\u8ddf\u65f6\u95f4\u6709\u5173\u7684\u4e8b\u60c5\u3002Intel 8254 CMOS\u82af\u7247\u5c31\u662f\u4e00\u4e2a\u5e38\u7528\u7684PIT\u82af\u7247\u3002PIT\u5176\u5b9e\u662f\u5355\u6838\u65f6\u4ee3\u7684\u4ea7\u7269\uff0c\u5b83\u80fd\u88ab\u5185\u6838\u7f16\u7a0b\u6bcf\u79d2\u4ea7\u751fHZ\u4e2a\u65f6\u949f\u4fe1\u53f7\uff0c\u6240\u4ee5\u5176\u9891\u7387\u53ea\u80fd\u662f100\u3001250\u3001300\u30011000\uff0c\u4e5f\u5c31\u662f\u6700\u5927\u7cbe\u5ea6\u4e3a1ms\uff0c\u592a\u4f4e\u4e86\u3002<\/p>\n\n\n\n<p>\u5173\u4e8eHPET\uff1aHPET\u76f8\u5f53\u4e8ePIT\u7684\u5347\u7ea7\u7248\uff0c\u672a\u6765\u662f\u8981\u5b8c\u5168\u53d6\u4ee3PIT\u7684\uff08\u6bd4\u5982\u5728\u6211\u4eec\u7684\u673a\u5668\u4e0a\u5df2\u7ecf\u770b\u4e0d\u5230PIT\u4e86\uff0c\u53ea\u6709HPET\uff09\u3002\u5178\u578b\u7684HPET\u82af\u7247\u53ef\u5185\u7f6e\u591a\u8fbe8\u4e2a\u72ec\u7acb\u7684\u8ba1\u6570\u5668\uff0c\u6bcf\u4e2a\u8ba1\u6570\u5668\u90fd\u7531\u72ec\u7acb\u7684\u65f6\u949f\u4fe1\u53f7\u9a71\u52a8\uff0c\u4e14\u9891\u7387\u81f3\u5c11\u53ef\u8fbe10MHz\u3002HPET\u901a\u8fc7\u5bc4\u5b58\u5668\u5411\u5185\u6838\u66b4\u9732\u8ba1\u6570\u5668\u7684\u503c\uff0c\u652f\u6301\u53ef\u7f16\u7a0b\u7684\u4e00\u6b21\u6027\u4e2d\u65ad\u548c\u5468\u671f\u6027\u4e2d\u65ad\u3002HPET\u7684\u7cbe\u5ea6\u548c\u901f\u5ea6\u548c\u529f\u80fd\u90fd\u6bd4\u8f83OK\uff0c\u6240\u4ee5\u88ab\u5f53\u505a\u7b2c\u4e8c\u4f18\u5148\u7684\u7cfb\u7edf\u65f6\u949f\u6e90\uff0c\u4f46\u5b83\u7684\u95ee\u9898\u662f\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7684\u7cfb\u7edf\u90fd\u6709HPET\uff0c\u800c\u4e14\u6709\u4e9bHPET\u65f6\u949f\u662f\u4e0d\u53ef\u9760\u7684\u3002<\/p>\n\n\n\n<p>\u5173\u4e8eACPI_PM\uff1a\u5b83\u662f\u8ddfTSC\u4e00\u6837\u5e7f\u6cdb\u5b58\u5728\u7684\u8ba1\u65f6\u5668\uff0c\u4f46\u8ddfTSC\u4e0d\u540c\u7684\u662f\uff0cTSC\u662f\u57fa\u4e8eCPU\u5bc4\u5b58\u5668\u7684\uff0c\u53ef\u88abCPU\u76f4\u63a5\u8bfb\u53d6\uff0c\u800cACPI_PM\u662f\u57fa\u4e8e\u8bbe\u5907\u5bc4\u5b58\u5668\u7684\uff0c\u9700\u8981\u901a\u8fc7IO\u7aef\u53e3\u8bfb\u53d6\u5bc4\u5b58\u5668\u7684\u503c\uff0c\u56e0\u6b64\u901f\u5ea6\u6162\u5f88\u591a\u3002<\/p>\n\n\n\n<p>\u5173\u4e8eRTC\uff1aRTC\u5373\u524d\u4e00\u5c0f\u8282\u6211\u4eec\u63d0\u5230\u7684\u90a3\u4e2a\u81ea\u5e26\u7535\u6c60\u7528\u4e8e\u7ef4\u62a4\u7cfb\u7edf\u65e5\u671f\u65f6\u95f4\u7684\u8bbe\u5907\uff0c\u5b83\u7684\u95ee\u9898\u5728\u4e8e\u7cbe\u5ea6\u592a\u5dee\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2.2 TSC\u65f6\u949f\u6e90<\/h3>\n\n\n\n<p>\u73b0\u4ee3Linux\u670d\u52a1\u5668\u5e7f\u6cdb\u91c7\u7528TSC\u4f5c\u4e3a\u65f6\u949f\u6e90\uff0c\u672c\u8282\u4e2d\u6211\u4eec\u6df1\u5165\u5206\u6790\u4e00\u4e0bTSC\u3002<\/p>\n\n\n\n<p>\u867d\u7136TSC\u662f\u65f6\u949f\u6e90\uff0c\u4f46\u5176\u5b9eTSC\u53ea\u662fCPU\u65f6\u949f\u4fe1\u53f7\u7684\u6d88\u8d39\u8005\u800c\u975e\u751f\u4ea7\u8005\uff0c\u65e2\uff1aTSC\u5e76\u4e0d\u4e3aCPU\u4ea7\u751fCLK\u5f15\u811a\u4fe1\u53f7\uff0c\u5b83\u5176\u5b9e\u53ea\u662fCPU\u6839\u636eCLK\u5f15\u811a\u4fe1\u53f7\u5b9a\u671f\u66f4\u65b0\u7684\u4e00\u4e2a\u5bc4\u5b58\u5668\u3002CPU\u7684CLK\u4fe1\u53f7\u6e90\u662f\u5916\u90e8\u6676\u632f\uff0c\u901a\u5e38\u662f\u7531\u4f4d\u4e8e\u4e3b\u677f\u7684\u4e3b\u6676\u632f\u7ecf\u8fc7\u500d\u9891\u800c\u6765\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=B7djs4zSbuU\">\u8fd9\u4e00\u4e2a\u89c6\u9891<\/a>\u4ee5\u4e00\u79cd\u7b80\u5355\u6613\u61c2\uff08\u4f46\u4e0d\u7cbe\u786e\uff09\u7684\u65b9\u5f0f\u89e3\u91ca\u4e86\u4e3b\u6676\u632f\u7684\u65f6\u949f\u4fe1\u53f7\u5982\u4f55\u53d8\u6210CPU\u7684CLK\u5f15\u811a\u4fe1\u53f7\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1740\" height=\"854\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2025\/01\/image.png\" alt=\"\" class=\"wp-image-5564\"\/><\/figure>\n\n\n\n<p>\u5927\u6982\u5c31\u662f\uff1a\u4e3b\u677f\u4e0a\u7684\u4e3b\u6676\u632f\u662f\u9a71\u52a8\u4e3b\u677f\u5404\u6838\u5fc3\u82af\u7247\u7ec4\u5de5\u4f5c\u548c\u534f\u8c03\u7684\u6700\u7ec8\u65f6\u949f\u6e90\uff0c\u4e3b\u6676\u632f\u7684\u9891\u7387\u901a\u8fc7\u500d\u9891\u653e\u5927N\u500d\u540e\u8f93\u5165\u5230CPU\u7684CLK\u5f15\u811a\uff0cCPU\u5185\u90e8\u7684\u9891\u7387\u5408\u6210\u5668\u7535\u8def\u518d\u5c06\u500d\u9891\u5904\u7406\u4e3a\u6700\u7ec8\u7684\u5904\u7406\u5668\u4e3b\u9891\uff0c\u9a71\u52a8CPU\u5de5\u4f5c\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\uff0c\u5728Linux\u8fd0\u884c\u671f\u95f4\uff0c\u6700\u7ec8\u9a71\u52a8CPU\u548c\u5185\u6838\u66f4\u65b0\u7cfb\u7edf\u65f6\u95f4\u7684\uff0c\u662f\u4f4d\u4e8e\u4e3b\u677f\u4e0a\u7684\u4e3b\u6676\u632f\uff0c\u90a3\u4e48\u6700\u7ec8\u51b3\u5b9a\u7cfb\u7edf\u65f6\u95f4\u6f02\u79fb\u7a0b\u5ea6\u7684\u6700\u5927\u56e0\u7d20\uff0c\u5176\u5b9e\u4e5f\u662f\u8fd9\u4e2a\u4e3b\u6676\u632f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2.3 \u6676\u632f<\/h3>\n\n\n\n<p>\u6676\u632f\uff08Crystal Oscillator\uff09\uff0c\u5373\u6676\u4f53\u632f\u8361\u5668\uff0c\u73b0\u5728\u4e00\u822c\u4e13\u6307\u77f3\u82f1\u6676\u4f53\u632f\u8361\u5668(Quartz Crystal Resonator)\uff0c\u662f\u5229\u7528\u77f3\u82f1\u6676\u4f53\u7684\u538b\u7535\u6548\u5e94\uff0c\u7528\u6765\u4ea7\u751f\u9ad8\u7cbe\u5ea6\u632f\u8361\u9891\u7387\u7684\u4e00\u79cd\u7535\u5b50\u5668\u4ef6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1\uff09\u6676\u632f\u5206\u7c7b<\/h4>\n\n\n\n<p>\u77f3\u82f1\u6676\u632f\u7684\u5176\u4e2d\u4e00\u79cd\u5206\u7c7b\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u666e\u901a\u6676\u632f\uff1a\u7b80\u79f0SPXO\uff08Simple Packaged Crystal oscillator\uff09<\/li>\n\n\n\n<li> \u6e29\u8865\u6676\u632f\uff1a\u7b80\u79f0TCXO\uff08Temperature compensated crystal oscillator\uff09<\/li>\n\n\n\n<li> \u6052\u6e29\u6676\u632f\uff1a\u7b80\u79f0OCXO\uff08Oven-controlled crystal oscillator\uff09<\/li>\n\n\n\n<li> \u538b\u63a7\u6676\u632f\uff1a\u7b80\u79f0VCXO\uff08Voltage-controlled crystal oscillator\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u666e\u901a\u6676\u632f\u662f\u6700\u57fa\u672c\u7684\u6676\u632f\uff0c\u5176\u7a33\u5b9a\u6027\u5b8c\u5168\u7531\u6676\u4f53\u8c10\u632f\u5668\u672c\u8eab\u7684\u56fa\u6709\u7279\u6027\uff08\u4e3b\u8981\u662f\u6750\u6599\u548c\u5de5\u827a\uff09\u51b3\u5b9a\u3002\u5728-55\u2103\u81f3+105\u2103\u4e4b\u95f4\u7684\u73af\u5883\u6e29\u5ea6\u8303\u56f4\u5185\uff0c\u666e\u901a\u6676\u632f\u4e5f\u80fd\u63d0\u4f9b\u76f8\u5bf9\u7a33\u5b9a\u7684\u9891\u7387\uff0c\u53ef\u5b9e\u73b0\u00b125ppm\u7684\u7a33\u5b9a\u6027\uff08ppm\u5373Parts Per Million\uff0c\u00b125ppm\u8868\u793a\u8be5\u6676\u632f\u7684\u5de5\u4f5c\u9891\u7387\u76f8\u5bf9\u4e8e\u5176\u6807\u79f0\u9891\u7387\u53ef\u80fd\u6709\u00b1\u767e\u4e07\u5206\u4e4b25\u7684\u8bef\u5dee\uff0c\u4f8b\u5982\uff0c\u5047\u8bbe\u67d0\u6676\u632f\u7684\u6807\u79f0\u5de5\u4f5c\u9891\u7387\u4e3a100MHz\uff0c\u00b125ppm\u5373\u610f\u5473\u7740\u8be5\u6676\u632f\u7684\u5de5\u4f5c\u9891\u7387\u53ef\u80fd\u572899.999975~100.000025\u4e4b\u95f4\u53d8\u5316\uff09\u3002<\/p>\n\n\n\n<p>\u6e29\u8865\u6676\u632f\u5373\u6e29\u5ea6\u8865\u507f\u6676\u4f53\u632f\u8361\u5668\u3002\u5982\u679c\u77f3\u82f1\u6676\u4f53\u7684\u56fa\u6709\u9891\u7387\u548c\u6e29\u5ea6\u7a33\u5b9a\u6027\u4e0d\u80fd\u6ee1\u8db3\u5e94\u7528\u8981\u6c42\uff0c\u53ef\u4ee5\u589e\u52a0\u6e29\u5ea6\u8865\u507f\u5355\u5143\uff0c\u62b5\u6d88\u6676\u4f53\u7684\u6f02\u79fb\u3002\u6839\u636e\u6e29\u8865\u6676\u632f\u7684\u7c7b\u578b\u548c\u6e29\u5ea6\u8303\u56f4\uff0c\u5176\u5178\u578b\u7a33\u5b9a\u6027\u89c4\u8303\u8303\u56f4\u4e3a\u5c0f\u4e8e\u00b10.5ppm\u81f3\u00b15ppm\u3002<\/p>\n\n\n\n<p>\u6052\u6e29\u6676\u632f\u5373\u6052\u6e29\u63a7\u5236\u6676\u4f53\u632f\u8361\u5668\u3002\u5176\u5de5\u4f5c\u539f\u7406\u662f\u5229\u7528\u6052\u6e29\u69fd\u4f7f\u6676\u4f53\u632f\u8361\u5668\u4e2d\u77f3\u82f1\u6676\u4f53\u8c10\u632f\u5668\u7684\u6e29\u5ea6\u4fdd\u6301\u6052\u5b9a\uff0c\u5c06\u7531\u5468\u56f4\u6e29\u5ea6\u53d8\u5316\u5f15\u8d77\u7684\u632f\u8361\u5668\u8f93\u51fa\u9891\u7387\u53d8\u5316\u91cf\u524a\u51cf\u5230\u6700\u5c0f\u3002\u5728\u73af\u5883\u6e29\u5ea6\u8303\u56f4\u5185\uff0c\u6052\u6e29\u6676\u632f\u7684\u7a33\u5b9a\u6027\u53ef\u4ee5\u8fbe\u52300.001ppm\u3002<\/p>\n\n\n\n<p>\u538b\u63a7\u6676\u632f\u5373\u7535\u538b\u63a7\u5236\u6676\u4f53\u632f\u8361\u5668\uff0c\u5176\u8bbe\u8ba1\u4e0d\u662f\u4e3a\u4e86\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u800c\u662f\u8c03\u8c10\u6216\u8c03\u6574\u632f\u8361\u5668\u7684\u9891\u7387\uff0c\u56e0\u6b64\u8fd9\u91cc\u4e0d\u518d\u8ba8\u8bba\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2\uff09\u6676\u632f\u5de5\u4f5c\u9891\u7387<\/h4>\n\n\n\n<p>\u666e\u901aLinux\u670d\u52a1\u5668\u4e0a\u4e00\u822c\u6709\u4e09\u79cd\u9891\u7387\u7684\u6676\u632f\uff1a<\/p>\n\n\n\n<p>32.768KHz\u6676\u632f\uff1a\u8be5\u9891\u7387\u7ecf\u8fc7\u5206\u9891\u5668\u8fdb\u884c15\u6b212\u5206\u9891\u540e\u53ef\u4ee5\u5f97\u52301Hz\u79d2\u4fe1\u53f7\uff0c\u53731\u79d21\u6b21\uff0c\u56e0\u6b64\u975e\u5e38\u9002\u5408\u7528\u4e8e\u65e5\u671f-\u65f6\u95f4\u65f6\u949f\u3002\u5de5\u4f5c\u9891\u7387\u8d8a\u9ad8\u7684\u6676\u4f53\uff0c\u54c1\u8d28\u7cfb\u6570\u4e00\u822c\u96be\u4ee5\u505a\u9ad8\uff0c\u9891\u7387\u7a33\u5b9a\u5ea6\u4e0d\u9ad8\u3002\u800c32.768K\u7684\u6676\u4f53\u7a33\u5b9a\u5ea6\u7b49\u5404\u65b9\u9762\u90fd\u4e0d\u9519\uff0c\u54c1\u8d28\u7cfb\u6570\u6bd4\u8f83\u5bb9\u6613\u505a\u9ad8\uff0c\u4e8e\u662f\u5c31\u5f62\u6210\u4e86\u4e00\u4e2a\u5de5\u4e1a\u6807\u51c6\u3002\u4e0a\u6587\u6211\u4eec\u6240\u8bf4\u7684\u786c\u4ef6\u65f6\u949f\uff08RTC\uff09\u7684\u5de5\u4f5c\u9891\u7387\u5c31\u662f32.768KHz\u3002<\/p>\n\n\n\n<p>14.318MHz\u6676\u632f\uff1a\u4e00\u822c\u7528\u4f5c\u4e3b\u677f\u7684\u4e3b\u65f6\u949f\uff0c\u7ecf\u8fc7\u5206\u9891\u548c\u500d\u9891\u540e\u7528\u4e8e\u9a71\u52a8\u4e3b\u677f\u4e0a\u7684\u4e0d\u540c\u5143\u5668\u4ef6\u3002\u4f8b\u5982CPU\u3001PCI\u8bbe\u5907\u3001USB\u8bbe\u5907\u7b49\u3002\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u4f1a\u662f14.318MHz\uff0c\u662f\u56e0\u4e3a\u6700\u65e9\u7684\u8ba1\u7b97\u673a\u4e3b\u9891\u662f4.77Mhz\uff0c14.318MHz\u7ecf\u8fc7\u4e00\u6b21\u4e8c\u5206\u9891\u53ef\u4ee5\u964d\u52304.77MHz\u3002\u7f8e\u56fd\u6a21\u62df\u7535\u89c6\u5236\u5f0fNTSC\u7684\u5f69\u8272\u526f\u8f7d\u6ce2\u7684\u9891\u7387\u662f3.579545MHz\uff0c14.318MHz\u7ecf\u8fc72\u6b212\u5206\u9891\u5c31\u53ef\u4ee5\u5f97\u5230\u8be5\u9891\u7387\u3002\u540e\u6765\u8be5\u9891\u7387\u5c31\u9010\u6e10\u6210\u4e3a\u6807\u51c6\u4e86\u3002<\/p>\n\n\n\n<p>25MHz\u6676\u632f\uff1a\u4e00\u822c\u7528\u4e8e\u7f51\u5361\uff0c\u5e76\u4e14\u662f\u5355\u72ec\u7684\u6676\u632f\u82af\u7247\u3002\u5177\u4f53\u539f\u56e0\u6709\u4e8c\uff1a\u4e00\u662f\u7f51\u5361\u9700\u8981\u8f83\u9ad8\u9891\u7387\u7684\u5de5\u4f5c\u65f6\u949f\u6765\u4fdd\u8bc1\u6570\u636e\u4f20\u8f93\u7684\u7cbe\u786e\u6027\uff0c\u4ee5\u964d\u4f4e\u4e22\u5305\u7684\u6982\u7387\uff0c\u6240\u4ee5\u8981\u63d0\u9ad8\u5de5\u4f5c\u9891\u7387\uff1b\u4e8c\u662f\u9ad8\u9891\u7387\u65f6\u949f\u5728\u8d70\u7ebf\u65f6\u8981\u5c3d\u91cf\u9760\u8fd1\u7f51\u5361\u4e3b\u82af\u7247\uff0c\u4ee5\u589e\u52a0\u53ef\u9760\u6027\uff0c\u6240\u4ee5\u8981\u91c7\u7528\u5355\u72ec\u82af\u7247\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.3 \u603b\u7ed3<\/h2>\n\n\n\n<p>\u8bfb\u5230\u8fd9\u91cc\u6211\u4eec\u77e5\u9053\u4e86\uff0cLinux\u670d\u52a1\u5668\u7684\u4e24\u79cd\u7ef4\u6301\u65f6\u95f4\u66f4\u65b0\u7684\u65b9\u5f0f\uff0c\u5373\u786c\u4ef6\u65f6\u949f\u548c\u7cfb\u7edf\u65f6\u949f\uff0c\u90fd\u662f\u7531\u6676\u632f\u9a71\u52a8\u66f4\u65b0\u7684\uff0c\u5176\u4e2d\u786c\u4ef6\u65f6\u949f\u662f\u7531\u5de5\u4f5c\u9891\u7387\u4e3a32.768KHz\u7684\u6676\u632f\u76f4\u63a5\u9a71\u52a8\u7684\uff0c\u7cfb\u7edf\u65f6\u949f\u662f\u7531\u5de5\u4f5c\u9891\u7387\u4e3a14.318MHz\u7684\u6676\u632f\u95f4\u63a5\u9a71\u52a8\u7684\uff0c\u5176\u5b9e\u51b3\u5b9a\u673a\u5668\u5728\u8fde\u7eed\u8fd0\u884c\u60c5\u51b5\u4e0b\u7684\u65f6\u949f\u6f02\u79fb\u7a0b\u5ea6\u7684\uff0c\u5c31\u662f\u95f4\u63a5\u9a71\u52a8\u7cfb\u7edf\u65f6\u949f\u7684\u8fd9\u4e2a14.318MHz\u7684\u4e3b\u65f6\u949f\u6676\u632f\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u6539\u5584\u7cfb\u7edf\u65f6\u949f\u6f02\u79fb\u7684\u95ee\u9898\uff0c\u6709\u4e24\u4e2a\u6bd4\u8f83\u53ef\u884c\u7684\u65b9\u6848\uff0c\u4e00\u662f\u5c06\u4e3b\u677f\u4e3b\u65f6\u949f\u7684\u6676\u632f\u82af\u7247\u6362\u6210\u6052\u6e29\u6676\u632f\uff0c\u4e8c\u662f\u5f15\u5165\u4e13\u7528ntp\u6388\u65f6\u8bbe\u5907\uff0c\u4f7f\u7528ntp\u534f\u8bae\u5b9e\u65f6\u5bf9\u65f6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1\uff09\u6052\u6e29\u6676\u632f\u65b9\u6848<\/h3>\n\n\n\n<p>\u666e\u901aLinux\u670d\u52a1\u5668\u7684\u4e3b\u6676\u632f\u4e3a\u975e\u6052\u6e29\u6676\u632f\uff0c\u6bcf24\u5c0f\u65f6\u7684\u5b88\u65f6\u7cbe\u5ea6\u5927\u6982\u5728\u00b11~2s\uff0c\u5373\u6bcf\u5c0f\u65f6\u5927\u6982\u504f\u79fb60ms\u3002<\/p>\n\n\n\n<p>\u6052\u6e29\u6676\u632f\u7684\u5b88\u65f6\u7cbe\u5ea6\u5c31\u597d\u5f88\u591a\u4e86\uff0c\u6bcf24\u5c0f\u65f6\u4e3a\u00b18us\uff0c\u5373\u6bcf\u5c0f\u65f6\u5927\u6982\u504f\u79fb333ns\uff0c\u8ddf\u666e\u901a\u6676\u632f\u4e0d\u5728\u4e00\u4e2a\u6570\u91cf\u7ea7\u4e0a\u3002\u4f46\u662f\u6052\u6e29\u6676\u632f\u7684\u4ef7\u94b1\u4e5f\u9ad8\u5f88\u591a\uff0c\u4e00\u4e2a\u6052\u6e29\u6676\u632f\u6a21\u5757\u5927\u6982\u5c0f\u51e0\u4e07\uff0c\u62b5\u5f97\u4e0a\u4e00\u53f0Linux\u670d\u52a1\u5668\u7684\u4ef7\u94b1\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2\uff09\u4e13\u7528\u6388\u65f6\u8bbe\u5907\u65b9\u6848<\/h3>\n\n\n\n<p>\u5982\u679c\u4e0d\u91c7\u7528\u6052\u6e29\u6676\u632f\uff0c\u90a3\u53ef\u4ee5\u8003\u8651\u5f15\u5165\u4e13\u7528\u7684ntp\u6388\u65f6\u8bbe\u5907\uff0c\u8fd9\u79cd\u8bbe\u5907\u9664\u4e86\u6807\u914d\u6052\u6e29\u6676\u632f\u5916\uff0c\u8fd8\u53ef\u9009\u5185\u7f6e\u94f7\u539f\u5b50\u949f\uff0c\u539f\u5b50\u949f\u76f8\u6bd4\u6052\u6e29\u6676\u632f\u7684\u5b88\u65f6\u7cbe\u5ea6\u53c8\u4e0a\u5347\u4e86\u4e00\u4e2a\u6570\u91cf\u7ea7\uff0c24\u5c0f\u65f6\u504f\u79fb\u5c0f\u4e8e200ns\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">3.\u53c2\u8003\u8d44\u6599<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/man7.org\/linux\/man-pages\/man8\/hwclock.8.html\">Linux man page \uff1ahwclock<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/docs.redhat.com\/en\/documentation\/red_hat_enterprise_linux_for_real_time\/7\/html\/reference_guide\/chap-timestamping\">RHEL Document\uff1aTimestamping<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/access.redhat.com\/solutions\/18627\">RHEL Document:How to change the clock source in the system<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.genuway.com\/3760.html\">\u6676\u8bfa\u5a01\u79d1\u6280\uff1aXO,VCXO,TCXO\u53caOCXO\u56db\u79cd\u6676\u632f\u6027\u80fd\u4f18\u52bf\u4ecb\u7ecd<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/sem.bdpnt.com\/ntptime.html\">\u5317\u6597\u90a6\u6cf0\uff1a\u4e13\u7528\u6388\u65f6\u8bbe\u5907<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=B7djs4zSbuU\">ITFreeTraining:Clock Speeds and Bus Speeds<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bilibili.com\/video\/BV1V34y1d7TG\">\u521b\u5ba2\u4e2d\u82af:\u6676\u632f\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u88ab\u96c6\u6210\u5230\u82af\u7247\u4e2d\uff1f<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bilibili.com\/video\/BV1XS4y19742\">\u521b\u5ba2\u4e2d\u82af:MCU\u4e3a\u4ec0\u4e48\u4e0d\u4eff\u6548RTC\uff0c\u628a\u6676\u632f\u548c\u82af\u7247\u5c01\u88c5\u5728\u4e00\u8d77\uff1f<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bilibili.com\/video\/BV1Zq4y1B7nf\/\">\u521b\u5ba2\u4e2d\u82af:\u4ece32.768K\u5230\u4e00\u79d2\u949f\uff0c\u82af\u7247\u5185\u90e8\u7684\u903b\u8f91\u7535\u8def\uff0c\u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff1f<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bilibili.com\/video\/BV1q84y1g7no\/\">\u8001\u77f3\u8c08\u82af\uff1a\u63ed\u79d8\u65f6\u949f\u4fe1\u53f7\uff1a\u8ba1\u7b97\u673a\u4e0e\u82af\u7247\u7684\u5fc3\u8df3\uff0c\u662f\u600e\u6837\u4ea7\u751f\u7684\uff1f<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u524d\u8a00 \u6700\u8fd1\u78b0\u5230\u4e86\u4e00\u4e2a\u670d\u52a1\u5668\u65f6\u95f4\u6f02\u79fb\u7684\u95ee\u9898\uff0c\u4e00\u53f0Linux\u670d\u52a1\u5668\u8fd0\u884c12\u5c0f\u65f6\u540e\uff0c\u7cfb\u7edf\u65f6\u949f\u6f02\u79fb\u4e86700\u591ams\uff0c\u800c\u4e14\u5728\u673a\u5668\u8d1f\u8f7d\u4e0d\u540c\u7684\u65f6\u5019\uff0c\u6f02\u79fb\u7a0b\u5ea6\u8fd8\u4e0d\u4e00\u6837\u3002 \u5176\u5b9e&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/www.wangkaixuan.tech\/?p=5549\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-5549","post","type-post","status-publish","format-standard","hentry","category-05-01-"],"_links":{"self":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/5549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5549"}],"version-history":[{"count":0,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/5549\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5549"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}