{"id":113576,"date":"2026-10-06T21:25:14","date_gmt":"2026-10-06T13:25:14","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/113576.html"},"modified":"2026-10-06T21:25:14","modified_gmt":"2026-10-06T13:25:14","slug":"linux-nvme-%e4%b8%ad%e6%96%ad%e6%8e%92%e6%9f%a5%e4%b8%8e%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%ef%bc%9anuma-%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/113576.html","title":{"rendered":"Linux NVMe \u4e2d\u65ad\u6392\u67e5\u4e0e\u6027\u80fd\u4f18\u5316\uff1aNUMA \u5b9e\u6218"},"content":{"rendered":"<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"-toc\" style=\"margin-left:40px\">\n<p id=\"%E5%BC%95%E8%A8%80-toc\" style=\"margin-left:40px\">\u5f15\u8a00<\/p>\n<p id=\"%E4%B8%80%E3%80%81%E5%85%88%E5%BB%BA%E7%AB%8B%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%8E%92%E6%9F%A5%E6%80%9D%E8%B7%AF-toc\" style=\"margin-left:40px\">\u4e00\u3001\u5148\u5efa\u7acb\u6b63\u786e\u7684\u6392\u67e5\u601d\u8def<\/p>\n<p id=\"%E4%BA%8C%E3%80%81%E5%87%86%E5%A4%87%E5%B7%A5%E5%85%B7%E4%B8%8E%E5%AE%89%E5%85%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9-toc\" style=\"margin-left:40px\">\u4e8c\u3001\u51c6\u5907\u5de5\u5177\u4e0e\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/p>\n<p id=\"%E5%AE%89%E5%85%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9-toc\" style=\"margin-left:80px\">\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/p>\n<p id=\"%E4%B8%89%E3%80%81%E8%AF%86%E5%88%AB%20NVMe%20%E6%8E%A7%E5%88%B6%E5%99%A8%E5%92%8C%20PCIe%20%E5%9C%B0%E5%9D%80-toc\" style=\"margin-left:40px\">\u4e09\u3001\u8bc6\u522b NVMe \u63a7\u5236\u5668\u548c PCIe \u5730\u5740<\/p>\n<p id=\"1.%20%E6%9F%A5%E7%9C%8B%20NVMe%20%E8%AE%BE%E5%A4%87-toc\" style=\"margin-left:80px\">1. \u67e5\u770b NVMe \u8bbe\u5907<\/p>\n<p id=\"2.%20%E8%8E%B7%E5%8F%96%20PCIe%20BDF%20%E5%9C%B0%E5%9D%80-toc\" style=\"margin-left:80px\">2. \u83b7\u53d6 PCIe BDF \u5730\u5740<\/p>\n<p id=\"3.%20%E7%A1%AE%E8%AE%A4%E4%B8%8A%E5%B1%82%E8%AE%BE%E5%A4%87%E6%98%AF%E5%90%A6%E7%BB%8F%E8%BF%87%E5%85%B6%E4%BB%96%E5%9D%97%E8%AE%BE%E5%A4%87-toc\" style=\"margin-left:80px\">3. \u786e\u8ba4\u4e0a\u5c42\u8bbe\u5907\u662f\u5426\u7ecf\u8fc7\u5176\u4ed6\u5757\u8bbe\u5907<\/p>\n<p id=\"%E5%9B%9B%E3%80%81%E6%A3%80%E6%9F%A5%20PCIe%20%E9%93%BE%E8%B7%AF%E6%98%AF%E5%90%A6%E6%AD%A3%E5%B8%B8-toc\" style=\"margin-left:40px\">\u56db\u3001\u68c0\u67e5 PCIe \u94fe\u8def\u662f\u5426\u6b63\u5e38<\/p>\n<p id=\"%E4%BA%94%E3%80%81%E7%A1%AE%E8%AE%A4%20MSI-X%20%E6%98%AF%E5%90%A6%E5%90%AF%E7%94%A8-toc\" style=\"margin-left:40px\">\u4e94\u3001\u786e\u8ba4 MSI-X \u662f\u5426\u542f\u7528<\/p>\n<p id=\"1.%20%E6%9F%A5%E7%9C%8B%20MSI-X%20%E8%83%BD%E5%8A%9B-toc\" style=\"margin-left:80px\">1. \u67e5\u770b MSI-X \u80fd\u529b<\/p>\n<p id=\"2.%20%E6%9F%A5%E7%9C%8B%E8%AE%BE%E5%A4%87%E5%AE%9E%E9%99%85%E5%88%86%E9%85%8D%E7%9A%84%20IRQ-toc\" style=\"margin-left:80px\">2. \u67e5\u770b\u8bbe\u5907\u5b9e\u9645\u5206\u914d\u7684 IRQ<\/p>\n<p id=\"%E5%85%AD%E3%80%81%E6%9F%A5%E7%9C%8B%20NVMe%20%E4%B8%AD%E6%96%AD%E5%88%86%E5%B8%83-toc\" style=\"margin-left:40px\">\u516d\u3001\u67e5\u770b NVMe \u4e2d\u65ad\u5206\u5e03<\/p>\n<p id=\"1.%20%E6%9F%A5%E7%9C%8B%20%2Fproc%2Finterrupts-toc\" style=\"margin-left:80px\">1. \u67e5\u770b \/proc\/interrupts<\/p>\n<p id=\"2.%20%E5%8F%AA%E6%9F%A5%E7%9C%8B%E7%9B%AE%E6%A0%87%E8%AE%BE%E5%A4%87%E7%9A%84%20IRQ-toc\" style=\"margin-left:80px\">2. \u53ea\u67e5\u770b\u76ee\u6807\u8bbe\u5907\u7684 IRQ<\/p>\n<p id=\"3.%20%E5%8A%A8%E6%80%81%E8%A7%82%E5%AF%9F%E4%B8%AD%E6%96%AD%E8%AE%A1%E6%95%B0-toc\" style=\"margin-left:80px\">3. \u52a8\u6001\u89c2\u5bdf\u4e2d\u65ad\u8ba1\u6570<\/p>\n<p id=\"%E4%B8%83%E3%80%81%E6%A3%80%E6%9F%A5%20NVMe%20%E9%98%9F%E5%88%97%E6%95%B0%E9%87%8F%E5%92%8C%20blk-mq%20%E6%98%A0%E5%B0%84-toc\" style=\"margin-left:40px\">\u4e03\u3001\u68c0\u67e5 NVMe \u961f\u5217\u6570\u91cf\u548c blk-mq \u6620\u5c04<\/p>\n<p id=\"1.%20%E6%9F%A5%E7%9C%8B%E5%9D%97%E5%B1%82%E7%A1%AC%E4%BB%B6%E9%98%9F%E5%88%97-toc\" style=\"margin-left:80px\">1. \u67e5\u770b\u5757\u5c42\u786c\u4ef6\u961f\u5217<\/p>\n<p id=\"2.%20%E6%9F%A5%E7%9C%8B%E6%AF%8F%E4%B8%AA%20blk-mq%20%E9%98%9F%E5%88%97%E5%AF%B9%E5%BA%94%E7%9A%84%20CPU-toc\" style=\"margin-left:80px\">2. \u67e5\u770b\u6bcf\u4e2a blk-mq \u961f\u5217\u5bf9\u5e94\u7684 CPU<\/p>\n<p id=\"3.%20%E6%9F%A5%E7%9C%8B%E6%8E%A7%E5%88%B6%E5%99%A8%E9%98%9F%E5%88%97%E4%BF%A1%E6%81%AF-toc\" style=\"margin-left:80px\">3. \u67e5\u770b\u63a7\u5236\u5668\u961f\u5217\u4fe1\u606f<\/p>\n<p id=\"%E5%85%AB%E3%80%81%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E4%B8%8E%E4%B8%AD%E6%96%AD%E5%90%88%E5%B9%B6%E8%B0%83%E4%BC%98-toc\" style=\"margin-left:40px\">\u516b\u3001\u961f\u5217\u6df1\u5ea6\u4e0e\u4e2d\u65ad\u5408\u5e76\u8c03\u4f18<\/p>\n<p id=\"1.%20%E6%9F%A5%E7%9C%8B%E5%BD%93%E5%89%8D%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6-toc\" style=\"margin-left:80px\">1. \u67e5\u770b\u5f53\u524d\u961f\u5217\u6df1\u5ea6<\/p>\n<p id=\"2.%20%E4%BD%BF%E7%94%A8%20nvme%20set-feature%20%E8%B0%83%E6%95%B4%20NVMe%20%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6-toc\" style=\"margin-left:80px\">2. \u4f7f\u7528 nvme set-feature \u8c03\u6574 NVMe \u961f\u5217\u6df1\u5ea6<\/p>\n<p id=\"3.%20%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E8%BF%87%E5%A4%A7%E5%AF%BC%E8%87%B4%E5%B0%BE%E5%BB%B6%E8%BF%9F%E5%8D%87%E9%AB%98%E7%9A%84%E5%8E%9F%E7%90%86-toc\" style=\"margin-left:80px\">3. \u961f\u5217\u6df1\u5ea6\u8fc7\u5927\u5bfc\u81f4\u5c3e\u5ef6\u8fdf\u5347\u9ad8\u7684\u539f\u7406<\/p>\n<p id=\"4.%20%E4%B8%8D%E5%90%8C%E8%B4%9F%E8%BD%BD%E7%B1%BB%E5%9E%8B%E4%B8%8B%E5%BB%BA%E8%AE%AE%E7%9A%84%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E8%8C%83%E5%9B%B4-toc\" style=\"margin-left:80px\">4. \u4e0d\u540c\u8d1f\u8f7d\u7c7b\u578b\u4e0b\u5efa\u8bae\u7684\u961f\u5217\u6df1\u5ea6\u8303\u56f4<\/p>\n<p id=\"5.%20%E4%B8%AD%E6%96%AD%E5%90%88%E5%B9%B6%E4%B8%8E%E8%BD%AE%E8%AF%A2%E5%8F%82%E6%95%B0%E7%9A%84%E6%9F%A5%E7%9C%8B%E4%B8%8E%E8%AE%BE%E7%BD%AE-toc\" style=\"margin-left:80px\">5. \u4e2d\u65ad\u5408\u5e76\u4e0e\u8f6e\u8be2\u53c2\u6570\u7684\u67e5\u770b\u4e0e\u8bbe\u7f6e<\/p>\n<p id=\"%E4%B9%9D%E3%80%81%E6%80%BB%E7%BB%93%E4%B8%8E%E5%BF%AB%E9%80%9F%E6%A3%80%E6%9F%A5%E6%B8%85%E5%8D%95-toc\" style=\"margin-left:40px\">\u4e5d\u3001\u603b\u7ed3\u4e0e\u5feb\u901f\u68c0\u67e5\u6e05\u5355<\/p>\n<p id=\"1.%20%E6%8C%89%E6%8E%92%E6%9F%A5%E9%A1%BA%E5%BA%8F%E6%8E%92%E5%88%97%E7%9A%84%E6%A3%80%E6%9F%A5%E9%A1%B9%E8%A1%A8%E6%A0%BC-toc\" style=\"margin-left:80px\">1. \u6309\u6392\u67e5\u987a\u5e8f\u6392\u5217\u7684\u68c0\u67e5\u9879\u8868\u683c<\/p>\n<p id=\"2.%20%E6%80%BB%E7%BB%93%EF%BC%9A%E6%8E%A8%E8%8D%90%E7%9A%84%E4%BC%98%E5%8C%96%E9%A1%BA%E5%BA%8F-toc\" style=\"margin-left:80px\">2. \u603b\u7ed3&#xff1a;\u63a8\u8350\u7684\u4f18\u5316\u987a\u5e8f<\/p>\n<p id=\"3.%20%E6%9C%80%E5%B8%B8%E8%A7%81%E7%9A%84%20NVMe%20%E6%80%A7%E8%83%BD%E7%93%B6%E9%A2%88%E8%AF%AF%E5%88%A4%E5%9C%BA%E6%99%AF%E5%8F%8A%E9%81%BF%E5%85%8D%E6%96%B9%E6%B3%95-toc\" style=\"margin-left:80px\">3. \u6700\u5e38\u89c1\u7684 NVMe \u6027\u80fd\u74f6\u9888\u8bef\u5224\u573a\u666f\u53ca\u907f\u514d\u65b9\u6cd5<\/p>\n<p id=\"%E5%8D%81%E3%80%81%E4%BA%92%E5%8A%A8%E4%B8%8E%E8%AE%A8%E8%AE%BA-toc\" style=\"margin-left:40px\">\u5341\u3001\u4e92\u52a8\u4e0e\u8ba8\u8bba<\/p>\n<hr id=\"hr-toc\" \/>\n<h3 id=\"%E5%BC%95%E8%A8%80\">\u5f15\u8a00<\/h3>\n<p>NVMe SSD \u901a\u8fc7 PCIe\u3001DMA\u3001\u591a\u961f\u5217\u548c MSI-X \u4e2d\u65ad\u5b9e\u73b0\u9ad8\u5e76\u53d1\u3001\u4f4e\u5ef6\u8fdf I\/O\u3002\u4f46\u5728\u5b9e\u9645\u7cfb\u7edf\u4e2d&#xff0c;\u5373\u4f7f SSD \u672c\u8eab\u6027\u80fd\u5f88\u9ad8&#xff0c;\u4e5f\u53ef\u80fd\u56e0\u4e3a\u4ee5\u4e0b\u95ee\u9898\u65e0\u6cd5\u53d1\u6325\u5e94\u6709\u6027\u80fd&#xff1a;<\/p>\n<ul>\n<li>MSI-X \u6ca1\u6709\u6b63\u5e38\u542f\u7528&#xff1b;<\/li>\n<li>I\/O \u961f\u5217\u6216\u4e2d\u65ad\u5411\u91cf\u6570\u91cf\u4e0d\u8db3&#xff1b;<\/li>\n<li>NVMe \u4e2d\u65ad\u96c6\u4e2d\u5728\u5c11\u6570 CPU&#xff1b;<\/li>\n<li>IRQ\u3001\u5e94\u7528\u7ebf\u7a0b\u548c\u8bbe\u5907\u4f4d\u4e8e\u4e0d\u540c NUMA \u8282\u70b9&#xff1b;<\/li>\n<li>irqbalance \u4e0e\u624b\u5de5\u4e2d\u65ad\u7ed1\u5b9a\u7b56\u7565\u51b2\u7a81&#xff1b;<\/li>\n<li>\u961f\u5217\u6df1\u5ea6\u8fc7\u5927&#xff0c;\u9020\u6210\u5c3e\u5ef6\u8fdf\u5347\u9ad8&#xff1b;<\/li>\n<li>\u4e2d\u65ad\u9891\u7387\u8fc7\u9ad8&#xff0c;\u6d88\u8017\u5927\u91cf CPU&#xff1b;<\/li>\n<li>PCIe \u94fe\u8def\u964d\u901f\u6216\u964d\u5bbd&#xff1b;<\/li>\n<li>\u63a7\u5236\u5668\u8fdb\u5165\u4f4e\u529f\u8017\u72b6\u6001\u540e\u4ea7\u751f\u5524\u9192\u5ef6\u8fdf&#xff1b;<\/li>\n<li>\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684 vCPU \u8c03\u5ea6\u6216\u4e2d\u65ad\u6ce8\u5165\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<p>\u672c\u6587\u4ece Linux \u5b9e\u6218\u89d2\u5ea6\u4ecb\u7ecd\u5982\u4f55\u89c2\u5bdf NVMe \u4e2d\u65ad\u3001\u5206\u6790 IRQ \u4e0e CPU \u7684\u6620\u5c04\u5173\u7cfb&#xff0c;\u5e76\u7ed3\u5408 NUMA\u3001\u961f\u5217\u6df1\u5ea6\u3001\u4e2d\u65ad\u5408\u5e76\u548c\u8f6e\u8be2\u6a21\u5f0f\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<hr \/>\n<h3 id=\"%E4%B8%80%E3%80%81%E5%85%88%E5%BB%BA%E7%AB%8B%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%8E%92%E6%9F%A5%E6%80%9D%E8%B7%AF\">\u4e00\u3001\u5148\u5efa\u7acb\u6b63\u786e\u7684\u6392\u67e5\u601d\u8def<\/h3>\n<p>NVMe \u6027\u80fd\u95ee\u9898\u4e0d\u80fd\u53ea\u770b SSD \u7684\u5e26\u5bbd\u6216 IOPS\u3002\u4e00\u4e2a\u5b8c\u6574\u7684 I\/O \u8def\u5f84\u5305\u62ec&#xff1a;<\/p>\n<p>\u5e94\u7528\u7ebf\u7a0b<br \/>\n   \u2193<br \/>\n\u6587\u4ef6\u7cfb\u7edf\u6216\u88f8\u5757\u8bbe\u5907<br \/>\n   \u2193<br \/>\nLinux \u5757\u5c42 blk-mq<br \/>\n   \u2193<br \/>\nNVMe Submission Queue<br \/>\n   \u2193<br \/>\nPCIe DMA<br \/>\n   \u2193<br \/>\nNVMe \u63a7\u5236\u5668<br \/>\n   \u2193<br \/>\nCompletion Queue<br \/>\n   \u2193<br \/>\nMSI-X \u4e2d\u65ad\u6216\u8f6e\u8be2<br \/>\n   \u2193<br \/>\nCPU \u5b8c\u6210\u8bf7\u6c42<\/p>\n<p>\u6027\u80fd\u4f18\u5316\u7684\u76ee\u6807\u662f\u8ba9\u4ee5\u4e0b\u8d44\u6e90\u5408\u7406\u5bf9\u5e94&#xff1a;<\/p>\n<p>\u5e94\u7528\u7ebf\u7a0b<br \/>\n   \u2193<br \/>\nCPU<br \/>\n   \u2193<br \/>\nblk-mq \u786c\u4ef6\u961f\u5217<br \/>\n   \u2193<br \/>\nNVMe Submission\/Completion Queue<br \/>\n   \u2193<br \/>\nMSI-X \u5411\u91cf<br \/>\n   \u2193<br \/>\nIRQ \u5904\u7406 CPU<br \/>\n   \u2193<br \/>\nNUMA \u8282\u70b9<\/p>\n<p>\u6392\u67e5\u65f6\u5efa\u8bae\u9075\u5faa\u4ee5\u4e0b\u987a\u5e8f&#xff1a;<\/p>\n<li>\u786e\u8ba4\u6d4b\u8bd5\u5bf9\u8c61\u548c\u5b9e\u9645\u7269\u7406\u8bbe\u5907&#xff1b;<\/li>\n<li>\u68c0\u67e5\u9a71\u52a8\u3001PCIe \u94fe\u8def\u548c\u8bbe\u5907\u9519\u8bef&#xff1b;<\/li>\n<li>\u786e\u8ba4 MSI-X \u662f\u5426\u542f\u7528&#xff1b;<\/li>\n<li>\u68c0\u67e5\u5b9e\u9645\u5206\u914d\u7684 IRQ \u548c NVMe \u961f\u5217&#xff1b;<\/li>\n<li>\u5728\u771f\u5b9e\u8d1f\u8f7d\u4e0b\u89c2\u5bdf\u4e2d\u65ad\u5206\u5e03&#xff1b;<\/li>\n<li>\u68c0\u67e5 IRQ\u3001\u5e94\u7528\u7ebf\u7a0b\u3001\u5185\u5b58\u548c\u8bbe\u5907\u7684 NUMA \u5173\u7cfb&#xff1b;<\/li>\n<li>\u8c03\u6574 CPU \u4eb2\u548c\u6027\u6216\u5de5\u4f5c\u8d1f\u8f7d\u5e03\u5c40&#xff1b;<\/li>\n<li>\u6700\u540e\u518d\u8003\u8651\u961f\u5217\u6df1\u5ea6\u3001\u4e2d\u65ad\u5408\u5e76\u3001\u8f6e\u8be2\u548c\u7535\u6e90\u7b56\u7565\u3002<\/li>\n<p>\u4e0d\u8981\u4e00\u5f00\u59cb\u5c31\u5173\u95ed IOMMU\u3001\u505c\u6b62 irqbalance \u6216\u4fee\u6539\u5927\u91cf\u5185\u6838\u53c2\u6570\u3002\u5148\u627e\u5230\u74f6\u9888&#xff0c;\u518d\u8fdb\u884c\u5355\u53d8\u91cf\u8c03\u6574\u3002<\/p>\n<hr \/>\n<h3 id=\"%E4%BA%8C%E3%80%81%E5%87%86%E5%A4%87%E5%B7%A5%E5%85%B7%E4%B8%8E%E5%AE%89%E5%85%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\">\u4e8c\u3001\u51c6\u5907\u5de5\u5177\u4e0e\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>\u5e38\u7528\u5de5\u5177\u5305\u62ec&#xff1a;<\/p>\n<p>sudo apt install pciutils nvme-cli numactl sysstat fio<\/p>\n<p>\u4e0d\u540c\u53d1\u884c\u7248\u7684\u8f6f\u4ef6\u5305\u7ba1\u7406\u547d\u4ee4\u53ef\u80fd\u4e0d\u540c\u3002<\/p>\n<p>\u672c\u6587\u793a\u4f8b\u4f7f\u7528\u4ee5\u4e0b\u8bbe\u5907\u540d\u79f0&#xff1a;<\/p>\n<p>CTRL&#061;nvme0<br \/>\nNS&#061;nvme0n1<\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<ul>\n<li>\/dev\/nvme0 \u662f NVMe \u63a7\u5236\u5668\u5b57\u7b26\u8bbe\u5907&#xff1b;<\/li>\n<li>\/dev\/nvme0n1 \u662f Namespace \u5757\u8bbe\u5907&#xff1b;<\/li>\n<li>\/dev\/nvme0n1p1 \u662f\u5bf9\u5e94\u5206\u533a\u3002<\/li>\n<\/ul>\n<h4 id=\"%E5%AE%89%E5%85%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\">\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/h4>\n<li>\u4e0d\u8981\u5728\u751f\u4ea7\u76d8\u4e0a\u6267\u884c\u968f\u673a\u5199\u6d4b\u8bd5\u3002<\/li>\n<li>\u5bf9\u88f8\u8bbe\u5907\u6267\u884c fio &#8211;rw&#061;randwrite \u4f1a\u7834\u574f\u6570\u636e\u3002<\/li>\n<li>\u4fee\u6539 IRQ \u4eb2\u548c\u6027\u53ef\u80fd\u5f71\u54cd\u7ebf\u4e0a\u5ef6\u8fdf\u3002<\/li>\n<li>\u91cd\u65b0\u52a0\u8f7d NVMe \u9a71\u52a8\u4f1a\u4f7f\u8bbe\u5907\u77ed\u6682\u79bb\u7ebf\u3002<\/li>\n<li>\u539f\u59cb\u8bbe\u5907\u7684\u53ea\u8bfb\u6d4b\u8bd5\u867d\u7136\u4e0d\u4f1a\u5199\u5165\u6570\u636e&#xff0c;\u4f46\u4ecd\u7136\u4f1a\u5360\u7528\u5e26\u5bbd\u3001\u961f\u5217\u548c\u63a7\u5236\u5668\u8d44\u6e90\u3002<\/li>\n<li>\u6bcf\u6b21\u53ea\u4fee\u6539\u4e00\u4e2a\u53d8\u91cf&#xff0c;\u5e76\u4fdd\u7559\u4fee\u6539\u524d\u7684\u57fa\u7ebf\u6570\u636e\u3002<\/li>\n<hr \/>\n<h3 id=\"%E4%B8%89%E3%80%81%E8%AF%86%E5%88%AB%20NVMe%20%E6%8E%A7%E5%88%B6%E5%99%A8%E5%92%8C%20PCIe%20%E5%9C%B0%E5%9D%80\">\u4e09\u3001\u8bc6\u522b NVMe \u63a7\u5236\u5668\u548c PCIe \u5730\u5740<\/h3>\n<h4 id=\"1.%20%E6%9F%A5%E7%9C%8B%20NVMe%20%E8%AE%BE%E5%A4%87\">1. \u67e5\u770b NVMe \u8bbe\u5907<\/h4>\n<p>nvme list<\/p>\n<p>\u793a\u4f8b\u8f93\u51fa\u53ef\u80fd\u5305\u62ec&#xff1a;<\/p>\n<p>Node             SN            Model                  Namespace<br \/>\n\/dev\/nvme0n1     XXXXXXXX      Example NVMe SSD       1<\/p>\n<p>\u67e5\u770b\u63a7\u5236\u5668\u548c Namespace \u5173\u7cfb&#xff1a;<\/p>\n<p>nvme list-subsys<\/p>\n<p>\u5982\u679c\u7cfb\u7edf\u4f7f\u7528\u4e86 NVMe Multipath&#xff0c;\u4e00\u4e2a Namespace \u53ef\u80fd\u901a\u8fc7\u591a\u4e2a\u63a7\u5236\u5668\u8def\u5f84\u8bbf\u95ee\u3002\u6b64\u65f6\u5fc5\u987b\u786e\u8ba4 I\/O \u5b9e\u9645\u7ecf\u8fc7\u54ea\u6761\u8def\u5f84\u3002<\/p>\n<hr \/>\n<h4 id=\"2.%20%E8%8E%B7%E5%8F%96%20PCIe%20BDF%20%E5%9C%B0%E5%9D%80\">2. \u83b7\u53d6 PCIe BDF \u5730\u5740<\/h4>\n<p>PCIe \u8bbe\u5907\u901a\u5e38\u4f7f\u7528\u4ee5\u4e0b\u683c\u5f0f\u6807\u8bc6&#xff1a;<\/p>\n<p>Domain:Bus:Device.Function<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>0000:5e:00.0<\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7 sysfs \u83b7\u53d6\u63a7\u5236\u5668\u5bf9\u5e94\u7684 PCIe \u5730\u5740&#xff1a;<\/p>\n<p>CTRL&#061;nvme0<br \/>\nBDF&#061;$(basename &#034;$(readlink -f \/sys\/class\/nvme\/$CTRL\/device)&#034;)<br \/>\necho &#034;$BDF&#034;<\/p>\n<p>\u7136\u540e\u67e5\u770b\u8bbe\u5907\u548c\u9a71\u52a8&#xff1a;<\/p>\n<p>lspci -s &#034;$BDF&#034; -nnk<\/p>\n<p>\u6b63\u5e38\u60c5\u51b5\u4e0b\u5e94\u770b\u5230&#xff1a;<\/p>\n<p>Kernel driver in use: nvme<\/p>\n<p>\u5982\u679c\u8bbe\u5907\u6ca1\u6709\u7ed1\u5b9a nvme \u9a71\u52a8&#xff0c;\u9700\u8981\u5148\u68c0\u67e5&#xff1a;<\/p>\n<ul>\n<li>\u9a71\u52a8\u662f\u5426\u52a0\u8f7d&#xff1b;<\/li>\n<li>\u8bbe\u5907\u662f\u5426\u88ab VFIO \u63a5\u7ba1&#xff1b;<\/li>\n<li>\u662f\u5426\u4f4d\u4e8e\u865a\u62df\u673a\u4e2d&#xff1b;<\/li>\n<li>\u5185\u6838\u65e5\u5fd7\u4e2d\u662f\u5426\u5b58\u5728\u521d\u59cb\u5316\u9519\u8bef\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4 id=\"3.%20%E7%A1%AE%E8%AE%A4%E4%B8%8A%E5%B1%82%E8%AE%BE%E5%A4%87%E6%98%AF%E5%90%A6%E7%BB%8F%E8%BF%87%E5%85%B6%E4%BB%96%E5%9D%97%E8%AE%BE%E5%A4%87\">3. \u786e\u8ba4\u4e0a\u5c42\u8bbe\u5907\u662f\u5426\u7ecf\u8fc7\u5176\u4ed6\u5757\u8bbe\u5907<\/h4>\n<p>\u5b9e\u9645\u4e1a\u52a1\u53ef\u80fd\u8bbf\u95ee\u7684\u662f&#xff1a;<\/p>\n<ul>\n<li>LVM \u903b\u8f91\u5377&#xff1b;<\/li>\n<li>device-mapper&#xff1b;<\/li>\n<li>dm-crypt&#xff1b;<\/li>\n<li>\u8f6f\u4ef6 RAID&#xff1b;<\/li>\n<li>NVMe Multipath&#xff1b;<\/li>\n<li>\u5bb9\u5668\u4e2d\u7684\u6620\u5c04\u8bbe\u5907&#xff1b;<\/li>\n<li>\u865a\u62df\u673a\u4e2d\u7684\u865a\u62df\u78c1\u76d8\u3002<\/li>\n<\/ul>\n<p>\u53ef\u4ee5\u67e5\u770b\u5757\u8bbe\u5907\u5173\u7cfb&#xff1a;<\/p>\n<p>lsblk -o NAME,TYPE,PKNAME,MAJ:MIN,SIZE,FSTYPE,MOUNTPOINTS<\/p>\n<p>\u5982\u679c\u4e1a\u52a1\u8bbf\u95ee\u7684\u662f \/dev\/mapper\/&#8230;&#xff0c;\u4e0d\u80fd\u7b80\u5355\u5047\u8bbe\u6240\u6709 I\/O \u90fd\u843d\u5230\u67d0\u4e2a\u56fa\u5b9a NVMe \u63a7\u5236\u5668\u4e0a\u3002<\/p>\n<hr \/>\n<h3 id=\"%E5%9B%9B%E3%80%81%E6%A3%80%E6%9F%A5%20PCIe%20%E9%93%BE%E8%B7%AF%E6%98%AF%E5%90%A6%E6%AD%A3%E5%B8%B8\">\u56db\u3001\u68c0\u67e5 PCIe \u94fe\u8def\u662f\u5426\u6b63\u5e38<\/h3>\n<p>\u4e2d\u65ad\u8c03\u4f18\u4e4b\u524d&#xff0c;\u5e94\u5148\u786e\u8ba4 PCIe \u94fe\u8def\u6ca1\u6709\u964d\u901f\u3001\u964d\u5bbd\u6216\u6301\u7eed\u62a5\u9519\u3002<\/p>\n<p>sudo lspci -s &#034;$BDF&#034; -vv<\/p>\n<p>\u91cd\u70b9\u67e5\u770b&#xff1a;<\/p>\n<p>LnkCap:<br \/>\nLnkSta:<br \/>\nDevSta:<br \/>\nMSI-X:<\/p>\n<p>\u4e5f\u53ef\u4ee5\u7b5b\u9009&#xff1a;<\/p>\n<p>sudo lspci -s &#034;$BDF&#034; -vv |<br \/>\ngrep -E &#039;LnkCap:|LnkSta:|DevSta:|MSI-X:&#039;<\/p>\n<p>\u4f8b\u5982&#xff0c;\u8bbe\u5907\u80fd\u529b\u53ef\u80fd\u662f&#xff1a;<\/p>\n<p>LnkCap: Speed 16GT\/s, Width x4<\/p>\n<p>\u5b9e\u9645\u94fe\u8def\u72b6\u6001\u53ef\u80fd\u662f&#xff1a;<\/p>\n<p>LnkSta: Speed 16GT\/s, Width x4<\/p>\n<p>\u5982\u679c LnkSta \u660e\u663e\u4f4e\u4e8e LnkCap&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p>LnkCap: Speed 16GT\/s, Width x4<br \/>\nLnkSta: Speed 8GT\/s, Width x2<\/p>\n<p>\u8bf4\u660e\u94fe\u8def\u53ef\u80fd\u51fa\u73b0\u964d\u901f\u6216\u964d\u5bbd\u3002\u5e38\u89c1\u539f\u56e0\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u4e3b\u677f\u63d2\u69fd\u53ea\u63d0\u4f9b\u90e8\u5206 PCIe \u901a\u9053&#xff1b;<\/li>\n<li>\u8f6c\u63a5\u5361\u6216\u80cc\u677f\u9650\u5236&#xff1b;<\/li>\n<li>BIOS \u914d\u7f6e\u95ee\u9898&#xff1b;<\/li>\n<li>PCIe \u4fe1\u53f7\u8d28\u91cf\u95ee\u9898&#xff1b;<\/li>\n<li>\u8bbe\u5907\u5b89\u88c5\u4f4d\u7f6e\u4e0d\u6b63\u786e&#xff1b;<\/li>\n<li>PCIe AER \u9519\u8bef\u540e\u94fe\u8def\u964d\u7ea7&#xff1b;<\/li>\n<li>\u865a\u62df\u5316\u5e73\u53f0\u9650\u5236\u3002<\/li>\n<\/ul>\n<p>PCIe \u94fe\u8def\u95ee\u9898\u4e0d\u662f IRQ \u7ed1\u5b9a\u80fd\u591f\u89e3\u51b3\u7684\u3002<\/p>\n<hr \/>\n<h3 id=\"%E4%BA%94%E3%80%81%E7%A1%AE%E8%AE%A4%20MSI-X%20%E6%98%AF%E5%90%A6%E5%90%AF%E7%94%A8\">\u4e94\u3001\u786e\u8ba4 MSI-X \u662f\u5426\u542f\u7528<\/h3>\n<h4 id=\"1.%20%E6%9F%A5%E7%9C%8B%20MSI-X%20%E8%83%BD%E5%8A%9B\">1. \u67e5\u770b MSI-X \u80fd\u529b<\/h4>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p>sudo lspci -s &#034;$BDF&#034; -vv | grep -A3 &#039;MSI-X&#039;<\/p>\n<p>\u5178\u578b\u8f93\u51fa&#xff1a;<\/p>\n<p>MSI-X: Enable&#043; Count&#061;65 Masked-<br \/>\n        Vector table: BAR&#061;0 offset&#061;&#8230;<br \/>\n        PBA: BAR&#061;0 offset&#061;&#8230;<\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<ul>\n<li>Enable&#043; \u8868\u793a MSI-X \u5df2\u542f\u7528&#xff1b;<\/li>\n<li>Enable- \u8868\u793a\u8bbe\u5907\u5177\u5907 MSI-X \u80fd\u529b&#xff0c;\u4f46\u5f53\u524d\u672a\u542f\u7528&#xff1b;<\/li>\n<li>Count&#061;65 \u8868\u793a MSI-X Table \u652f\u6301\u7684\u6700\u5927\u8868\u9879\u6570\u91cf&#xff1b;<\/li>\n<li>Masked- \u8868\u793a\u6ca1\u6709\u5168\u5c40\u5c4f\u853d\u5168\u90e8 MSI-X \u5411\u91cf\u3002<\/li>\n<\/ul>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>Count&#061;65 \u8868\u793a\u8bbe\u5907\u6700\u591a\u652f\u6301\u7684 MSI-X \u8868\u9879\u6570\u91cf&#xff0c;\u4e0d\u8868\u793a Linux \u5f53\u524d\u5b9e\u9645\u5206\u914d\u4e86 65 \u4e2a IRQ\u3002<\/p>\n<p>\u5b9e\u9645\u5206\u914d\u6570\u91cf\u5e94\u901a\u8fc7 sysfs \u6216 \/proc\/interrupts \u67e5\u770b\u3002<\/p>\n<hr \/>\n<h4 id=\"2.%20%E6%9F%A5%E7%9C%8B%E8%AE%BE%E5%A4%87%E5%AE%9E%E9%99%85%E5%88%86%E9%85%8D%E7%9A%84%20IRQ\">2. \u67e5\u770b\u8bbe\u5907\u5b9e\u9645\u5206\u914d\u7684 IRQ<\/h4>\n<p>PCI_PATH&#061;\/sys\/bus\/pci\/devices\/$BDF<\/p>\n<p>ls -1 &#034;$PCI_PATH\/msi_irqs&#034;<\/p>\n<p>\u8f93\u51fa\u53ef\u80fd\u662f&#xff1a;<\/p>\n<p>144<br \/>\n145<br \/>\n146<br \/>\n147<br \/>\n148<\/p>\n<p>\u8fd9\u4e9b\u6570\u5b57\u662f Linux IRQ \u7f16\u53f7\u3002<\/p>\n<p>\u7edf\u8ba1\u6570\u91cf&#xff1a;<\/p>\n<p>find &#034;$PCI_PATH\/msi_irqs&#034; -mindepth 1 -maxdepth 1 | wc -l<\/p>\n<p>\u5982\u679c msi_irqs \u76ee\u5f55\u4e0d\u5b58\u5728&#xff0c;\u5e94\u68c0\u67e5&#xff1a;<\/p>\n<ul>\n<li>MSI\/MSI-X \u662f\u5426\u5b9e\u9645\u542f\u7528&#xff1b;<\/li>\n<li>\u8bbe\u5907\u662f\u5426\u7531\u5176\u4ed6\u9a71\u52a8\u7ba1\u7406&#xff1b;<\/li>\n<li>\u662f\u5426\u8fd0\u884c\u5728\u865a\u62df\u673a\u4e2d&#xff1b;<\/li>\n<li>\u5185\u6838\u662f\u5426\u4f7f\u7528\u4e86\u7981\u7528 MSI \u7684\u542f\u52a8\u53c2\u6570&#xff1b;<\/li>\n<li>\u9a71\u52a8\u521d\u59cb\u5316\u662f\u5426\u5931\u8d25\u3002<\/li>\n<\/ul>\n<p>\u68c0\u67e5\u542f\u52a8\u53c2\u6570&#xff1a;<\/p>\n<p>cat \/proc\/cmdline<\/p>\n<p>\u5982\u679c\u5b58\u5728\u4ee5\u4e0b\u53c2\u6570&#xff0c;\u53ef\u80fd\u5f71\u54cd MSI&#xff1a;<\/p>\n<p>pci&#061;nomsi<\/p>\n<p>\u9664\u975e\u4e3a\u4e86\u5b9a\u4f4d\u7279\u5b9a\u786c\u4ef6\u95ee\u9898&#xff0c;\u5426\u5219\u4e0d\u5efa\u8bae\u7981\u7528 MSI\/MSI-X\u3002<\/p>\n<hr \/>\n<h3 id=\"%E5%85%AD%E3%80%81%E6%9F%A5%E7%9C%8B%20NVMe%20%E4%B8%AD%E6%96%AD%E5%88%86%E5%B8%83\">\u516d\u3001\u67e5\u770b NVMe \u4e2d\u65ad\u5206\u5e03<\/h3>\n<h4 id=\"1.%20%E6%9F%A5%E7%9C%8B%20%2Fproc%2Finterrupts\">1. \u67e5\u770b \/proc\/interrupts<\/h4>\n<p>grep -E &#039;CPU|nvme&#039; \/proc\/interrupts<\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p>           CPU0       CPU1       CPU2       CPU3<br \/>\n144:          5          0          0          0  PCI-MSI  nvme0q0<br \/>\n145:          0      10234          0          0  PCI-MSI  nvme0q1<br \/>\n146:          0          0      11567          0  PCI-MSI  nvme0q2<br \/>\n147:          0          0          0      10891  PCI-MSI  nvme0q3<\/p>\n<p>\u901a\u5e38&#xff1a;<\/p>\n<ul>\n<li>nvme0q0 \u5e38\u7528\u4e8e Admin Queue&#xff1b;<\/li>\n<li>nvme0q1\u3001nvme0q2 \u7b49\u901a\u5e38\u5bf9\u5e94 I\/O \u961f\u5217&#xff1b;<\/li>\n<li>\u6bcf\u4e00\u5217\u8868\u793a\u8be5 IRQ \u5728\u5bf9\u5e94\u903b\u8f91 CPU \u4e0a\u7d2f\u8ba1\u5904\u7406\u7684\u6b21\u6570\u3002<\/li>\n<\/ul>\n<p>\u4e0d\u540c\u5185\u6838\u7248\u672c\u548c\u9a71\u52a8\u5b9e\u73b0\u7684\u547d\u540d\u53ef\u80fd\u4e0d\u540c&#xff0c;\u4e0d\u80fd\u4ec5\u6839\u636e\u961f\u5217\u540d\u79f0\u65ad\u5b9a\u5e95\u5c42\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<hr \/>\n<h4 id=\"2.%20%E5%8F%AA%E6%9F%A5%E7%9C%8B%E7%9B%AE%E6%A0%87%E8%AE%BE%E5%A4%87%E7%9A%84%20IRQ\">2. \u53ea\u67e5\u770b\u76ee\u6807\u8bbe\u5907\u7684 IRQ<\/h4>\n<p>\u4e3a\u4e86\u907f\u514d\u7cfb\u7edf\u4e2d\u5b58\u5728\u591a\u4e2a NVMe \u8bbe\u5907\u65f6\u4ea7\u751f\u6df7\u6dc6&#xff0c;\u53ef\u4ee5\u6839\u636e PCIe \u8bbe\u5907\u7684 msi_irqs \u76ee\u5f55\u9010\u4e2a\u67e5\u770b&#xff1a;<\/p>\n<p>for path in \/sys\/bus\/pci\/devices\/$BDF\/msi_irqs\/*; do<br \/>\n    irq&#061;${path##*\/}<br \/>\n    awk -v n&#061;&#034;$irq:&#034; &#039;$1 &#061;&#061; n {print}&#039; \/proc\/interrupts<br \/>\ndone<\/p>\n<p>\u8fd9\u6837\u53ef\u4ee5\u628a IRQ \u4e0e\u5177\u4f53 PCIe \u63a7\u5236\u5668\u5bf9\u5e94\u8d77\u6765\u3002<\/p>\n<hr \/>\n<h4 id=\"3.%20%E5%8A%A8%E6%80%81%E8%A7%82%E5%AF%9F%E4%B8%AD%E6%96%AD%E8%AE%A1%E6%95%B0\">3. \u52a8\u6001\u89c2\u5bdf\u4e2d\u65ad\u8ba1\u6570<\/h4>\n<p>watch -n 1 &#039;grep -E &#034;CPU|nvme0q&#034; \/proc\/interrupts&#039;<\/p>\n<p>\u5728\u6267\u884c I\/O \u8d1f\u8f7d\u65f6&#xff0c;\u89c2\u5bdf\u4ee5\u4e0b\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>\u54ea\u4e9b\u6570\u636e\u961f\u5217 IRQ \u6b63\u5728\u589e\u957f&#xff1b;<\/li>\n<li>IRQ \u662f\u5426\u53ea\u96c6\u4e2d\u5230\u4e00\u4e2a CPU&#xff1b;<\/li>\n<li>\u4e0d\u540c\u961f\u5217\u662f\u5426\u5747\u5300\u589e\u957f&#xff1b;<\/li>\n<li>Admin Queue \u4e2d\u65ad\u662f\u5426\u5f88\u5c11&#xff1b;<\/li>\n<li>\u4e2d\u65ad\u6570\u662f\u5426\u4e0e\u8d1f\u8f7d\u53d8\u5316\u5927\u81f4\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<p>\u4e0d\u8981\u671f\u5f85\u6bcf\u4e2a I\/O \u90fd\u4ea7\u751f\u4e00\u6b21\u4e2d\u65ad\u3002\u539f\u56e0\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u4e00\u6b21\u4e2d\u65ad\u53ef\u4ee5\u6279\u91cf\u5904\u7406\u591a\u4e2a Completion Queue \u6761\u76ee&#xff1b;<\/li>\n<li>\u63a7\u5236\u5668\u53ef\u80fd\u4f7f\u7528\u4e2d\u65ad\u5408\u5e76&#xff1b;<\/li>\n<li>\u9a71\u52a8\u53ef\u80fd\u5728\u4e00\u6b21\u4e2d\u65ad\u4e2d\u56de\u6536\u591a\u4e2a\u5b8c\u6210\u8bf7\u6c42&#xff1b;<\/li>\n<li>\u90e8\u5206\u961f\u5217\u53ef\u80fd\u4f7f\u7528\u8f6e\u8be2&#xff1b;<\/li>\n<li>\u5de5\u4f5c\u8d1f\u8f7d\u53ef\u80fd\u547d\u4e2d\u9875\u7f13\u5b58&#xff0c;\u6ca1\u6709\u4ea7\u751f\u771f\u5b9e\u5757 I\/O\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3 id=\"%E4%B8%83%E3%80%81%E6%A3%80%E6%9F%A5%20NVMe%20%E9%98%9F%E5%88%97%E6%95%B0%E9%87%8F%E5%92%8C%20blk-mq%20%E6%98%A0%E5%B0%84\">\u4e03\u3001\u68c0\u67e5 NVMe \u961f\u5217\u6570\u91cf\u548c blk-mq \u6620\u5c04<\/h3>\n<\/p>\n<h4 id=\"1.%20%E6%9F%A5%E7%9C%8B%E5%9D%97%E5%B1%82%E7%A1%AC%E4%BB%B6%E9%98%9F%E5%88%97\">1. \u67e5\u770b\u5757\u5c42\u786c\u4ef6\u961f\u5217<\/h4>\n<p>find \/sys\/block\/$NS\/mq \\\\<br \/>\n    -mindepth 1 -maxdepth 1 -type d <\/p>\n<p>\u7edf\u8ba1\u6570\u91cf&#xff1a;<\/p>\n<p>find \/sys\/block\/$NS\/mq \\\\<br \/>\n    -mindepth 1 -maxdepth 1 -type d | wc -l <\/p>\n<p>\u8fd9\u4e9b\u76ee\u5f55\u8868\u793a Linux blk-mq \u4e3a\u8be5\u5757\u8bbe\u5907\u66b4\u9732\u7684\u786c\u4ef6\u4e0a\u4e0b\u6587\u3002\u5b83\u4eec\u4e0e NVMe I\/O Queue \u5173\u7cfb\u5bc6\u5207&#xff0c;\u4f46\u4e0d\u80fd\u7b80\u5355\u8ba4\u4e3a&#xff1a;<\/p>\n<p>blk-mq \u76ee\u5f55\u6570\u91cf &#061; MSI-X \u6570\u91cf &#061; CPU \u6570\u91cf <\/p>\n<p>\u4e09\u8005\u53ef\u80fd\u4e0d\u540c\u3002<\/p>\n<hr \/>\n<h4 id=\"2.%20%E6%9F%A5%E7%9C%8B%E6%AF%8F%E4%B8%AA%20blk-mq%20%E9%98%9F%E5%88%97%E5%AF%B9%E5%BA%94%E7%9A%84%20CPU\">2. \u67e5\u770b\u6bcf\u4e2a blk-mq \u961f\u5217\u5bf9\u5e94\u7684 CPU<\/h4>\n<p>for q in \/sys\/block\/$NS\/mq\/*; do<br \/>\n    printf &#039;%s: &#039; &#034;$(basename &#034;$q&#034;)&#034;<br \/>\n    cat &#034;$q\/cpu_list&#034;<br \/>\ndone <\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p>0: 0,4<br \/>\n1: 1,5<br \/>\n2: 2,6<br \/>\n3: 3,7 <\/p>\n<p>\u8fd9\u8868\u793a\u4e0d\u540c CPU \u63d0\u4ea4\u7684\u5757\u8bf7\u6c42\u4f1a\u88ab\u6620\u5c04\u5230\u5bf9\u5e94\u7684\u786c\u4ef6\u961f\u5217\u3002<\/p>\n<p>\u5982\u679c\u4e00\u4e2a\u5e94\u7528\u53ea\u8fd0\u884c\u5728 CPU 2&#xff0c;\u90a3\u4e48\u5b83\u53ef\u80fd\u4e3b\u8981\u4f7f\u7528 CPU 2 \u6240\u6620\u5c04\u7684\u67d0\u4e2a\u786c\u4ef6\u961f\u5217\u3002\u56e0\u6b64&#xff0c;\u5355\u7ebf\u7a0b\u6d4b\u8bd5\u53ea\u6fc0\u6d3b\u4e00\u4e2a NVMe \u961f\u5217\u901a\u5e38\u662f\u6b63\u5e38\u73b0\u8c61&#xff0c;\u4e0d\u80fd\u76f4\u63a5\u5224\u65ad\u4e3a\u961f\u5217\u914d\u7f6e\u9519\u8bef\u3002<\/p>\n<hr \/>\n<h4 id=\"3.%20%E6%9F%A5%E7%9C%8B%E6%8E%A7%E5%88%B6%E5%99%A8%E9%98%9F%E5%88%97%E4%BF%A1%E6%81%AF\">3. \u67e5\u770b\u63a7\u5236\u5668\u961f\u5217\u4fe1\u606f<\/h4>\n<p>\u90e8\u5206\u5185\u6838\u4f1a\u63d0\u4f9b&#xff1a;<\/p>\n<p>test -r \/sys\/class\/nvme\/$CTRL\/queue_count &amp; <\/p>\n<hr \/>\n<h3 id=\"%E5%85%AB%E3%80%81%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E4%B8%8E%E4%B8%AD%E6%96%AD%E5%90%88%E5%B9%B6%E8%B0%83%E4%BC%98\">\u516b\u3001\u961f\u5217\u6df1\u5ea6\u4e0e\u4e2d\u65ad\u5408\u5e76\u8c03\u4f18<\/h3>\n<h4 id=\"1.%20%E6%9F%A5%E7%9C%8B%E5%BD%93%E5%89%8D%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6\">1. \u67e5\u770b\u5f53\u524d\u961f\u5217\u6df1\u5ea6<\/h4>\n<p>\u5757\u5c42\u4e3a\u6bcf\u4e2a\u8bf7\u6c42\u961f\u5217\u7ef4\u62a4\u4e00\u4e2a nr_requests \u53c2\u6570&#xff0c;\u8868\u793a\u8be5\u961f\u5217\u6700\u591a\u53ef\u4ee5\u5bb9\u7eb3\u7684\u5f85\u5904\u7406\u8bf7\u6c42\u6570\u91cf\u3002\u67e5\u770b\u5f53\u524d\u503c&#xff1a;<\/p>\n<p>cat \/sys\/block\/nvme0n1\/queue\/nr_requests<\/p>\n<p>\u5178\u578b\u8f93\u51fa&#xff1a;<\/p>\n<p>256<\/p>\n<p>\u8fd9\u4e2a\u503c\u8868\u793a\u5757\u5c42\u5141\u8bb8\u6392\u961f\u7b49\u5f85\u4e0b\u53d1\u7684\u8bf7\u6c42\u4e0a\u9650\u3002\u5b83\u5e76\u4e0d\u76f4\u63a5\u7b49\u4e8e NVMe \u63a7\u5236\u5668\u5185\u90e8\u7684\u961f\u5217\u6df1\u5ea6&#xff0c;\u4f46\u4f1a\u5f71\u54cd\u8bf7\u6c42\u5728\u5757\u5c42\u7684\u5806\u79ef\u7a0b\u5ea6\u3002<\/p>\n<h4 id=\"2.%20%E4%BD%BF%E7%94%A8%20nvme%20set-feature%20%E8%B0%83%E6%95%B4%20NVMe%20%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6\">2. \u4f7f\u7528 nvme set-feature \u8c03\u6574 NVMe \u961f\u5217\u6df1\u5ea6<\/h4>\n<p>NVMe \u89c4\u8303\u901a\u8fc7 Number of Queues \u7279\u6027&#xff08;Feature ID 0x07&#xff09;\u914d\u7f6e I\/O \u961f\u5217\u6570\u91cf&#xff0c;\u800c\u961f\u5217\u6df1\u5ea6\u901a\u5e38\u5728\u63a7\u5236\u5668\u521d\u59cb\u5316\u65f6\u7531\u9a71\u52a8\u534f\u5546\u786e\u5b9a\u3002\u5bf9\u4e8e\u652f\u6301\u52a8\u6001\u8c03\u6574\u7684\u8bbe\u5907&#xff0c;\u53ef\u4ee5\u4f7f\u7528 nvme set-feature \u67e5\u770b\u6216\u4fee\u6539\u76f8\u5173\u7279\u6027&#xff1a;<\/p>\n<p>sudo nvme get-feature \/dev\/nvme0 -f 0x07 -H<\/p>\n<p>\u67e5\u770b\u5f53\u524d\u961f\u5217\u914d\u7f6e&#xff1a;<\/p>\n<p>sudo nvme set-feature \/dev\/nvme0 -f 0x07 -v 32<\/p>\n<p>\u4e0a\u9762\u7684\u547d\u4ee4\u5c1d\u8bd5\u5c06 I\/O \u961f\u5217\u6570\u91cf\u8bbe\u7f6e\u4e3a 32\u3002\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<ul>\n<li>\u5b9e\u9645\u751f\u6548\u7684\u961f\u5217\u6570\u91cf\u7531\u9a71\u52a8\u3001\u63a7\u5236\u5668\u80fd\u529b\u548c\u5185\u6838\u53c2\u6570\u5171\u540c\u51b3\u5b9a&#xff1b;<\/li>\n<li>\u4fee\u6539\u540e\u5efa\u8bae\u91cd\u65b0\u52a0\u8f7d\u9a71\u52a8\u6216\u91cd\u542f\u7cfb\u7edf&#xff0c;\u4f7f\u914d\u7f6e\u5b8c\u6574\u751f\u6548&#xff1b;<\/li>\n<li>\u751f\u4ea7\u73af\u5883\u4fee\u6539\u524d\u52a1\u5fc5\u8bb0\u5f55\u57fa\u7ebf\u6570\u636e&#xff0c;\u5e76\u786e\u8ba4\u4e1a\u52a1\u7a97\u53e3\u5141\u8bb8\u77ed\u6682\u79bb\u7ebf\u3002<\/li>\n<\/ul>\n<p>\u5757\u5c42\u8bf7\u6c42\u961f\u5217\u6df1\u5ea6\u4e5f\u53ef\u4ee5\u901a\u8fc7 sysfs \u8c03\u6574&#xff1a;<\/p>\n<p>echo 512 | sudo tee \/sys\/block\/nvme0n1\/queue\/nr_requests<\/p>\n<p>\u8be5\u4fee\u6539\u7acb\u5373\u751f\u6548&#xff0c;\u4f46\u91cd\u542f\u540e\u4f1a\u6062\u590d\u9ed8\u8ba4\u503c\u3002\u5982\u679c\u9700\u8981\u6301\u4e45\u5316&#xff0c;\u53ef\u4ee5\u5199\u5165 udev \u89c4\u5219\u6216\u7cfb\u7edf\u542f\u52a8\u811a\u672c\u3002<\/p>\n<h4 id=\"3.%20%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E8%BF%87%E5%A4%A7%E5%AF%BC%E8%87%B4%E5%B0%BE%E5%BB%B6%E8%BF%9F%E5%8D%87%E9%AB%98%E7%9A%84%E5%8E%9F%E7%90%86\">3. \u961f\u5217\u6df1\u5ea6\u8fc7\u5927\u5bfc\u81f4\u5c3e\u5ef6\u8fdf\u5347\u9ad8\u7684\u539f\u7406<\/h4>\n<p>\u961f\u5217\u6df1\u5ea6\u8d8a\u5927&#xff0c;\u63a7\u5236\u5668\u8d8a\u5bb9\u6613\u4fdd\u6301\u5fd9\u788c&#xff0c;\u7406\u8bba\u4e0a\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\u3002\u4f46\u8fc7\u5927\u7684\u961f\u5217\u6df1\u5ea6\u4f1a\u5e26\u6765\u4ee5\u4e0b\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u8bf7\u6c42\u5728\u961f\u5217\u4e2d\u7b49\u5f85\u7684\u65f6\u95f4\u53d8\u957f&#xff0c;\u5355\u4e2a\u8bf7\u6c42\u7684\u5b8c\u6210\u65f6\u95f4\u88ab\u62c9\u957f&#xff1b;<\/li>\n<li>\u591a\u4e2a\u8bf7\u6c42\u540c\u65f6\u7ade\u4e89\u63a7\u5236\u5668\u8d44\u6e90&#xff0c;\u9020\u6210\u6392\u961f\u6296\u52a8&#xff1b;<\/li>\n<li>\u4e2d\u65ad\u5904\u7406\u6279\u91cf\u53d8\u5927&#xff0c;CPU \u5904\u7406\u5b8c\u6210\u4e8b\u4ef6\u7684\u65f6\u95f4\u70b9\u66f4\u96c6\u4e2d&#xff0c;\u5ef6\u8fdf\u5206\u5e03\u53d8\u5bbd&#xff1b;<\/li>\n<li>\u5728\u9ad8\u8d1f\u8f7d\u4e0b&#xff0c;\u961f\u5934\u963b\u585e\u4f1a\u653e\u5927\u5c3e\u5ef6\u8fdf&#xff0c;\u4f7f P99 \u548c P99.9 \u660e\u663e\u6076\u5316\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64&#xff0c;\u961f\u5217\u6df1\u5ea6\u5e76\u4e0d\u662f\u8d8a\u5927\u8d8a\u597d\u3002\u5bf9\u4e8e\u5ef6\u8fdf\u654f\u611f\u578b\u8d1f\u8f7d&#xff0c;\u8f83\u5c0f\u7684\u961f\u5217\u6df1\u5ea6\u914d\u5408\u8db3\u591f\u7684\u961f\u5217\u6570\u91cf&#xff0c;\u5f80\u5f80\u80fd\u83b7\u5f97\u66f4\u7a33\u5b9a\u7684\u5ef6\u8fdf\u8868\u73b0\u3002<\/p>\n<h4 id=\"4.%20%E4%B8%8D%E5%90%8C%E8%B4%9F%E8%BD%BD%E7%B1%BB%E5%9E%8B%E4%B8%8B%E5%BB%BA%E8%AE%AE%E7%9A%84%E9%98%9F%E5%88%97%E6%B7%B1%E5%BA%A6%E8%8C%83%E5%9B%B4\">4. \u4e0d\u540c\u8d1f\u8f7d\u7c7b\u578b\u4e0b\u5efa\u8bae\u7684\u961f\u5217\u6df1\u5ea6\u8303\u56f4<\/h4>\n<table>\n<tr>\u8d1f\u8f7d\u7c7b\u578b\u5178\u578b\u573a\u666f\u5efa\u8bae\u961f\u5217\u6df1\u5ea6\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u9ad8 IOPS<\/td>\n<td>\u968f\u673a\u8bfb\u5199\u3001\u6570\u636e\u5e93\u4e8b\u52a1<\/td>\n<td>256 &#8211; 1024<\/td>\n<td>\u4fdd\u6301\u8f83\u9ad8\u6df1\u5ea6\u4ee5\u5145\u5206\u5229\u7528\u591a\u961f\u5217\u5e76\u884c\u80fd\u529b<\/td>\n<\/tr>\n<tr>\n<td>\u9ad8\u5e26\u5bbd<\/td>\n<td>\u987a\u5e8f\u8bfb\u5199\u3001\u65e5\u5fd7\u5199\u5165<\/td>\n<td>128 &#8211; 512<\/td>\n<td>\u6df1\u5ea6\u8fc7\u9ad8\u6536\u76ca\u6709\u9650&#xff0c;\u53cd\u800c\u589e\u52a0\u5ef6\u8fdf<\/td>\n<\/tr>\n<tr>\n<td>\u4f4e\u5ef6\u8fdf<\/td>\n<td>\u5728\u7ebf\u4ea4\u6613\u3001\u5b9e\u65f6\u67e5\u8be2<\/td>\n<td>32 &#8211; 128<\/td>\n<td>\u63a7\u5236\u6392\u961f\u957f\u5ea6&#xff0c;\u4f18\u5148\u4fdd\u8bc1\u5ef6\u8fdf\u7a33\u5b9a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0a\u8303\u56f4\u662f\u7ecf\u9a8c\u53c2\u8003\u503c&#xff0c;\u5b9e\u9645\u6700\u4f18\u503c\u9700\u8981\u901a\u8fc7\u538b\u6d4b\u5bf9\u6bd4\u786e\u5b9a\u3002\u5efa\u8bae\u4f7f\u7528 fio \u5206\u522b\u6d4b\u8bd5\u4e0d\u540c\u6df1\u5ea6\u4e0b\u7684\u541e\u5410\u548c\u5ef6\u8fdf\u5206\u5e03&#xff0c;\u518d\u7ed3\u5408\u4e1a\u52a1\u6307\u6807\u9009\u62e9\u3002<\/p>\n<\/p>\n<h4 id=\"5.%20%E4%B8%AD%E6%96%AD%E5%90%88%E5%B9%B6%E4%B8%8E%E8%BD%AE%E8%AF%A2%E5%8F%82%E6%95%B0%E7%9A%84%E6%9F%A5%E7%9C%8B%E4%B8%8E%E8%AE%BE%E7%BD%AE\">5. \u4e2d\u65ad\u5408\u5e76\u4e0e\u8f6e\u8be2\u53c2\u6570\u7684\u67e5\u770b\u4e0e\u8bbe\u7f6e<\/h4>\n<\/p>\n<p>NVMe \u9a71\u52a8\u5728\u90e8\u5206\u5185\u6838\u7248\u672c\u4e2d\u63d0\u4f9b\u4e2d\u65ad\u5408\u5e76\u548c\u8f6e\u8be2\u76f8\u5173\u53c2\u6570&#xff0c;\u901a\u5e38\u4f4d\u4e8e\u63a7\u5236\u5668 sysfs \u76ee\u5f55\u4e0b\u3002\u67e5\u770b\u5f53\u524d\u914d\u7f6e&#xff1a;<\/p>\n<p>ls \/sys\/class\/nvme\/nvme0\/queue\/<\/p>\n<p>\u67e5\u770b\u662f\u5426\u652f\u6301\u8f6e\u8be2\u6a21\u5f0f&#xff1a;<\/p>\n<p>cat \/sys\/class\/nvme\/nvme0\/queue\/io_poll<\/p>\n<p>\u8f93\u51fa 0 \u8868\u793a\u8f6e\u8be2\u672a\u542f\u7528&#xff0c;1 \u8868\u793a\u5df2\u542f\u7528\u3002\u542f\u7528\u8f6e\u8be2&#xff1a;<\/p>\n<p>echo 1 | sudo tee \/sys\/class\/nvme\/nvme0\/queue\/io_poll<\/p>\n<p>\u90e8\u5206\u9a71\u52a8\u8fd8\u652f\u6301\u4e2d\u65ad\u5408\u5e76\u76f8\u5173\u53c2\u6570&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p>cat \/sys\/module\/nvme\/parameters\/io_timeout<br \/>\ncat \/sys\/module\/nvme\/parameters\/poll_queues<\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<ul>\n<li>io_timeout \u63a7\u5236 I\/O \u8d85\u65f6\u65f6\u95f4&#xff0c;\u95f4\u63a5\u5f71\u54cd\u8bf7\u6c42\u91cd\u8bd5\u548c\u5ef6\u8fdf\u8868\u73b0&#xff1b;<\/li>\n<li>poll_queues \u6307\u5b9a\u4f7f\u7528\u8f6e\u8be2\u6a21\u5f0f\u7684\u961f\u5217\u6570\u91cf&#xff0c;\u9002\u5408\u5ef6\u8fdf\u6781\u654f\u611f\u4e14 CPU \u8d44\u6e90\u5145\u8db3\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<p>\u4fee\u6539\u5185\u6838\u6a21\u5757\u53c2\u6570\u9700\u8981\u91cd\u65b0\u52a0\u8f7d\u6a21\u5757\u6216\u5199\u5165\u542f\u52a8\u53c2\u6570&#xff1a;<\/p>\n<p>sudo modprobe -r nvme<br \/>\nsudo modprobe nvme poll_queues&#061;4<\/p>\n<p>\u4e2d\u65ad\u5408\u5e76\u548c\u8f6e\u8be2\u7684\u53d6\u820d\u539f\u5219&#xff1a;<\/p>\n<ul>\n<li>\u4e2d\u65ad\u5408\u5e76\u9002\u5408\u9ad8\u541e\u5410\u3001\u53ef\u5bb9\u5fcd\u4e00\u5b9a\u5ef6\u8fdf\u7684\u573a\u666f&#xff0c;\u53ef\u4ee5\u51cf\u5c11 CPU \u4e2d\u65ad\u5f00\u9500&#xff1b;<\/li>\n<li>\u8f6e\u8be2\u6a21\u5f0f\u9002\u5408\u4f4e\u5ef6\u8fdf\u3001\u9ad8 CPU \u5360\u7528\u53ef\u63a5\u53d7\u7684\u573a\u666f&#xff0c;\u53ef\u4ee5\u907f\u514d\u4e2d\u65ad\u5ef6\u8fdf\u6296\u52a8&#xff1b;<\/li>\n<li>\u4e24\u8005\u90fd\u9700\u8981\u7ed3\u5408\u771f\u5b9e\u8d1f\u8f7d\u9a8c\u8bc1&#xff0c;\u4e0d\u80fd\u4ec5\u51ed\u7406\u8bba\u5224\u65ad\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3 id=\"%E4%B9%9D%E3%80%81%E6%80%BB%E7%BB%93%E4%B8%8E%E5%BF%AB%E9%80%9F%E6%A3%80%E6%9F%A5%E6%B8%85%E5%8D%95\">\u4e5d\u3001\u603b\u7ed3\u4e0e\u5feb\u901f\u68c0\u67e5\u6e05\u5355<\/h3>\n<\/p>\n<h4 id=\"1.%20%E6%8C%89%E6%8E%92%E6%9F%A5%E9%A1%BA%E5%BA%8F%E6%8E%92%E5%88%97%E7%9A%84%E6%A3%80%E6%9F%A5%E9%A1%B9%E8%A1%A8%E6%A0%BC\">1. \u6309\u6392\u67e5\u987a\u5e8f\u6392\u5217\u7684\u68c0\u67e5\u9879\u8868\u683c<\/h4>\n<p>\u4e0b\u8868\u6c47\u603b\u4e86\u672c\u6587\u6d89\u53ca\u7684\u5b8c\u6574\u6392\u67e5\u6d41\u7a0b&#xff0c;\u6309\u5efa\u8bae\u7684\u6267\u884c\u987a\u5e8f\u6392\u5217\u3002\u6bcf\u9879\u90fd\u7ed9\u51fa\u68c0\u67e5\u547d\u4ee4\u3001\u9884\u671f\u7ed3\u679c\u548c\u5e38\u89c1\u95ee\u9898&#xff0c;\u4fbf\u4e8e\u5728\u9047\u5230 NVMe \u6027\u80fd\u95ee\u9898\u65f6\u5feb\u901f\u5bf9\u7167\u3002<\/p>\n<table>\n<tr>\u6392\u67e5\u987a\u5e8f\u68c0\u67e5\u9879\u68c0\u67e5\u547d\u4ee4\u9884\u671f\u7ed3\u679c\u5e38\u89c1\u95ee\u9898<\/tr>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>\u8bc6\u522b NVMe \u63a7\u5236\u5668\u548c PCIe \u5730\u5740<\/td>\n<td>nvme list\u3001readlink -f \/sys\/class\/nvme\/nvme0\/device<\/td>\n<td>\u80fd\u786e\u8ba4\u8bbe\u5907\u578b\u53f7\u3001Namespace \u548c BDF \u5730\u5740<\/td>\n<td>\u8bbe\u5907\u672a\u7ed1\u5b9a nvme \u9a71\u52a8&#xff0c;\u6216\u88ab VFIO \u63a5\u7ba1<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>\u786e\u8ba4\u4e0a\u5c42\u8bbe\u5907\u662f\u5426\u7ecf\u8fc7\u5176\u4ed6\u5757\u8bbe\u5907<\/td>\n<td>lsblk -o NAME,TYPE,PKNAME,MAJ:MIN<\/td>\n<td>\u80fd\u770b\u6e05 LVM\u3001dm-crypt\u3001Multipath \u7b49\u6620\u5c04\u5173\u7cfb<\/td>\n<td>\u4e1a\u52a1\u8bbf\u95ee\u7684\u662f \/dev\/mapper\/&#8230;&#xff0c;\u8bef\u4ee5\u4e3a I\/O \u76f4\u63a5\u843d\u5230\u56fa\u5b9a\u63a7\u5236\u5668<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u68c0\u67e5 PCIe \u94fe\u8def\u72b6\u6001<\/td>\n<td>sudo lspci -s &#034;$BDF&#034; -vv | grep -E &#039;LnkCap:|LnkSta:&#039;<\/td>\n<td>LnkSta \u7684\u901f\u5ea6\u548c\u5bbd\u5ea6\u4e0d\u4f4e\u4e8e LnkCap<\/td>\n<td>\u94fe\u8def\u964d\u901f\u6216\u964d\u5bbd&#xff0c;IRQ \u7ed1\u5b9a\u65e0\u6cd5\u89e3\u51b3<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u786e\u8ba4 MSI-X \u662f\u5426\u542f\u7528<\/td>\n<td>sudo lspci -s &#034;$BDF&#034; -vv | grep -A3 &#039;MSI-X&#039;<\/td>\n<td>\u663e\u793a Enable&#043;&#xff0c;\u4e14 msi_irqs \u76ee\u5f55\u5b58\u5728<\/td>\n<td>MSI-X \u672a\u542f\u7528&#xff0c;\u6216\u5185\u6838\u542f\u52a8\u53c2\u6570\u5305\u542b pci&#061;nomsi<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>\u67e5\u770b\u8bbe\u5907\u5b9e\u9645\u5206\u914d\u7684 IRQ<\/td>\n<td>ls -1 \/sys\/bus\/pci\/devices\/$BDF\/msi_irqs<\/td>\n<td>\u80fd\u770b\u5230\u591a\u4e2a IRQ \u7f16\u53f7&#xff0c;\u6570\u91cf\u4e0e\u961f\u5217\u6570\u5339\u914d<\/td>\n<td>msi_irqs \u76ee\u5f55\u4e0d\u5b58\u5728&#xff0c;\u6216 IRQ \u6570\u91cf\u660e\u663e\u504f\u5c11<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>\u89c2\u5bdf\u4e2d\u65ad\u5206\u5e03<\/td>\n<td>watch -n 1 &#039;grep -E &#034;CPU|nvme0q&#034; \/proc\/interrupts&#039;<\/td>\n<td>\u8d1f\u8f7d\u4e0b\u5404 I\/O \u961f\u5217 IRQ \u5206\u6563\u5230\u591a\u4e2a CPU<\/td>\n<td>\u4e2d\u65ad\u96c6\u4e2d\u5728\u5355\u4e2a CPU&#xff0c;\u6216\u961f\u5217\u95f4\u8ba1\u6570\u4e25\u91cd\u4e0d\u5747<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>\u68c0\u67e5 blk-mq \u961f\u5217\u4e0e CPU \u6620\u5c04<\/td>\n<td>for q in \/sys\/block\/$NS\/mq\/*; do cat &#034;$q\/cpu_list&#034;; done<\/td>\n<td>\u6bcf\u4e2a\u786c\u4ef6\u961f\u5217\u5bf9\u5e94\u5408\u7406\u7684 CPU \u96c6\u5408<\/td>\n<td>\u5355\u7ebf\u7a0b\u6d4b\u8bd5\u53ea\u6fc0\u6d3b\u4e00\u4e2a\u961f\u5217&#xff0c;\u8bef\u5224\u4e3a\u914d\u7f6e\u9519\u8bef<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>\u786e\u8ba4 NUMA \u5173\u7cfb<\/td>\n<td>cat \/sys\/bus\/pci\/devices\/$BDF\/numa_node\u3001numactl &#8211;hardware<\/td>\n<td>\u8bbe\u5907\u3001IRQ \u5904\u7406 CPU \u548c\u5e94\u7528\u7ebf\u7a0b\u4f4d\u4e8e\u540c\u4e00 NUMA \u8282\u70b9<\/td>\n<td>\u8de8 NUMA \u8bbf\u95ee\u5bfc\u81f4\u5ef6\u8fdf\u5347\u9ad8&#xff0c;IRQ \u7ed1\u5b9a\u65b9\u5411\u9519\u8bef<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>\u8c03\u6574 IRQ \u4eb2\u548c\u6027<\/td>\n<td>echo &#034;$cpu&#034; | sudo tee \/proc\/irq\/$irq\/smp_affinity_list<\/td>\n<td>\u5404\u961f\u5217 IRQ \u5747\u5300\u7ed1\u5b9a\u5230\u8bbe\u5907\u6240\u5728 NUMA \u8282\u70b9\u7684 CPU<\/td>\n<td>irqbalance \u4e0e\u624b\u5de5\u7ed1\u5b9a\u51b2\u7a81&#xff0c;\u8c03\u6574\u540e\u88ab\u8986\u76d6<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>\u8c03\u6574\u961f\u5217\u6df1\u5ea6\u4e0e\u4e2d\u65ad\u5408\u5e76<\/td>\n<td>cat \/sys\/block\/nvme0n1\/queue\/nr_requests\u3001cat \/sys\/class\/nvme\/nvme0\/queue\/io_poll<\/td>\n<td>\u961f\u5217\u6df1\u5ea6\u548c\u4e2d\u65ad\u5408\u5e76\u53c2\u6570\u4e0e\u8d1f\u8f7d\u7c7b\u578b\u5339\u914d<\/td>\n<td>\u961f\u5217\u6df1\u5ea6\u8fc7\u5927\u5bfc\u81f4\u5c3e\u5ef6\u8fdf\u5347\u9ad8&#xff0c;\u6216\u8f6e\u8be2\u6a21\u5f0f\u5360\u7528\u8fc7\u591a CPU<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 id=\"2.%20%E6%80%BB%E7%BB%93%EF%BC%9A%E6%8E%A8%E8%8D%90%E7%9A%84%E4%BC%98%E5%8C%96%E9%A1%BA%E5%BA%8F\">2. \u603b\u7ed3&#xff1a;\u63a8\u8350\u7684\u4f18\u5316\u987a\u5e8f<\/h4>\n<p>NVMe \u6027\u80fd\u4f18\u5316\u5fc5\u987b\u9075\u5faa\u4ece\u5e95\u5c42\u5230\u4e0a\u5c42\u7684\u6392\u67e5\u987a\u5e8f&#xff0c;\u907f\u514d\u5728\u9519\u8bef\u7684\u65b9\u5411\u4e0a\u6d6a\u8d39\u7cbe\u529b\u3002\u63a8\u8350\u7684\u987a\u5e8f\u662f&#xff1a;\u5148\u786e\u8ba4 PCIe \u94fe\u8def\u548c MSI-X \u542f\u7528\u72b6\u6001&#xff0c;\u518d\u5206\u6790\u4e2d\u65ad\u5206\u5e03\u548c NUMA \u5173\u7cfb&#xff0c;\u6700\u540e\u624d\u8c03\u6574\u961f\u5217\u6df1\u5ea6\u548c\u4e2d\u65ad\u5408\u5e76\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4&#xff0c;PCIe \u94fe\u8def\u964d\u901f\u6216\u964d\u5bbd\u5c5e\u4e8e\u786c\u4ef6\u5c42\u9762\u7684\u95ee\u9898&#xff0c;\u4efb\u4f55 IRQ \u7ed1\u5b9a\u6216\u961f\u5217\u53c2\u6570\u8c03\u6574\u90fd\u65e0\u6cd5\u5f25\u8865&#xff0c;\u56e0\u6b64\u5fc5\u987b\u6700\u5148\u6392\u9664\u3002MSI-X \u672a\u542f\u7528\u5219\u610f\u5473\u7740\u8bbe\u5907\u53ef\u80fd\u9000\u56de\u5230\u4f20\u7edf\u4e2d\u65ad\u6a21\u5f0f&#xff0c;\u4e2d\u65ad\u5411\u91cf\u6570\u91cf\u4e0d\u8db3\u4f1a\u76f4\u63a5\u9650\u5236\u591a\u961f\u5217\u5e76\u884c\u80fd\u529b&#xff0c;\u8fd9\u4e5f\u662f\u540e\u7eed\u6240\u6709\u5206\u6790\u7684\u524d\u63d0\u3002\u53ea\u6709\u786e\u8ba4\u94fe\u8def\u6b63\u5e38\u3001MSI-X \u5df2\u542f\u7528&#xff0c;\u4e2d\u65ad\u5206\u5e03\u548c NUMA \u5173\u7cfb\u7684\u5206\u6790\u624d\u6709\u610f\u4e49\u3002<\/p>\n<p>\u5728\u4e2d\u65ad\u5206\u5e03\u548c NUMA \u5173\u7cfb\u5c42\u9762&#xff0c;\u91cd\u70b9\u662f\u628a IRQ \u5904\u7406 CPU\u3001\u5e94\u7528\u7ebf\u7a0b\u548c\u8bbe\u5907\u653e\u5728\u540c\u4e00\u4e2a NUMA \u8282\u70b9&#xff0c;\u5e76\u8ba9\u5404\u961f\u5217\u7684\u4e2d\u65ad\u5747\u5300\u5206\u6563\u5230\u8be5\u8282\u70b9\u7684\u591a\u4e2a CPU \u4e0a\u3002\u8fd9\u4e00\u6b65\u901a\u5e38\u80fd\u89e3\u51b3\u5927\u90e8\u5206\u4e2d\u65ad\u96c6\u4e2d\u548c\u8de8 NUMA \u8bbf\u95ee\u5bfc\u81f4\u7684\u5ef6\u8fdf\u95ee\u9898\u3002<\/p>\n<p>\u6700\u540e\u624d\u8003\u8651\u961f\u5217\u6df1\u5ea6\u548c\u4e2d\u65ad\u5408\u5e76\u3002\u961f\u5217\u6df1\u5ea6\u5e76\u975e\u8d8a\u5927\u8d8a\u597d&#xff0c;\u8fc7\u5927\u4f1a\u653e\u5927\u5c3e\u5ef6\u8fdf&#xff1b;\u4e2d\u65ad\u5408\u5e76\u548c\u8f6e\u8be2\u6a21\u5f0f\u5404\u6709\u9002\u7528\u573a\u666f&#xff0c;\u9700\u8981\u7ed3\u5408\u771f\u5b9e\u8d1f\u8f7d\u9a8c\u8bc1\u3002\u6309\u7167\u8fd9\u4e2a\u987a\u5e8f\u6392\u67e5&#xff0c;\u53ef\u4ee5\u907f\u514d\u5728\u786c\u4ef6\u6216\u4e2d\u65ad\u914d\u7f6e\u5b58\u5728\u6839\u672c\u95ee\u9898\u65f6&#xff0c;\u76f2\u76ee\u8c03\u6574\u4e0a\u5c42\u53c2\u6570\u800c\u6536\u6548\u751a\u5fae\u3002<\/p>\n<h4 id=\"3.%20%E6%9C%80%E5%B8%B8%E8%A7%81%E7%9A%84%20NVMe%20%E6%80%A7%E8%83%BD%E7%93%B6%E9%A2%88%E8%AF%AF%E5%88%A4%E5%9C%BA%E6%99%AF%E5%8F%8A%E9%81%BF%E5%85%8D%E6%96%B9%E6%B3%95\">3. \u6700\u5e38\u89c1\u7684 NVMe \u6027\u80fd\u74f6\u9888\u8bef\u5224\u573a\u666f\u53ca\u907f\u514d\u65b9\u6cd5<\/h4>\n<ul>\n<li>\u8bef\u5224\u4e00&#xff1a;\u4e2d\u65ad\u96c6\u4e2d\u5728\u5355\u4e2a CPU \u5c31\u8ba4\u4e3a\u662f IRQ \u4eb2\u548c\u6027\u95ee\u9898\u3002\u5355\u7ebf\u7a0b\u6d4b\u8bd5\u53ea\u6fc0\u6d3b\u4e00\u4e2a NVMe \u961f\u5217\u662f\u6b63\u5e38\u73b0\u8c61&#xff0c;\u56e0\u4e3a\u5e94\u7528\u53ea\u8fd0\u884c\u5728\u67d0\u4e2a CPU \u4e0a&#xff0c;\u5bf9\u5e94\u7684\u8bf7\u6c42\u53ea\u4f1a\u6620\u5c04\u5230\u8be5 CPU \u5173\u8054\u7684\u786c\u4ef6\u961f\u5217\u3002\u907f\u514d\u65b9\u6cd5&#xff1a;\u5148\u786e\u8ba4\u8d1f\u8f7d\u662f\u5426\u591a\u7ebf\u7a0b\u3001\u591a\u961f\u5217&#xff0c;\u518d\u89c2\u5bdf\u4e2d\u65ad\u5206\u5e03&#xff1b;\u5982\u679c\u5355\u7ebf\u7a0b\u8d1f\u8f7d\u4e0b\u4e2d\u65ad\u96c6\u4e2d&#xff0c;\u4e0d\u80fd\u76f4\u63a5\u5224\u5b9a\u4e3a\u914d\u7f6e\u9519\u8bef\u3002<\/li>\n<li>\u8bef\u5224\u4e8c&#xff1a;IOPS \u4e0d\u8fbe\u6807\u5c31\u7acb\u523b\u8c03\u6574\u961f\u5217\u6df1\u5ea6\u3002\u961f\u5217\u6df1\u5ea6\u53ea\u662f\u5f71\u54cd\u6027\u80fd\u7684\u56e0\u7d20\u4e4b\u4e00&#xff0c;PCIe \u94fe\u8def\u964d\u901f\u3001MSI-X \u672a\u542f\u7528\u6216\u8de8 NUMA \u8bbf\u95ee\u90fd\u53ef\u80fd\u9020\u6210\u540c\u6837\u7684\u73b0\u8c61\u3002\u907f\u514d\u65b9\u6cd5&#xff1a;\u5148\u6309\u68c0\u67e5\u6e05\u5355\u9010\u9879\u6392\u9664\u786c\u4ef6\u548c\u4e2d\u65ad\u914d\u7f6e\u95ee\u9898&#xff0c;\u518d\u8003\u8651\u961f\u5217\u6df1\u5ea6\u8c03\u6574&#xff0c;\u907f\u514d\u5728\u9519\u8bef\u65b9\u5411\u4e0a\u53cd\u590d\u8bd5\u9519\u3002<\/li>\n<li>\u8bef\u5224\u4e09&#xff1a;\u770b\u5230 P99 \u5ef6\u8fdf\u5347\u9ad8\u5c31\u8ba4\u4e3a\u662f\u4e2d\u65ad\u5408\u5e76\u5bfc\u81f4\u7684\u3002\u5c3e\u5ef6\u8fdf\u5347\u9ad8\u53ef\u80fd\u6765\u81ea\u961f\u5217\u6df1\u5ea6\u8fc7\u5927\u3001\u961f\u5934\u963b\u585e\u3001\u63a7\u5236\u5668\u4f4e\u529f\u8017\u5524\u9192\u6216\u5e94\u7528\u7ebf\u7a0b\u8de8 NUMA \u8bbf\u95ee\u3002\u907f\u514d\u65b9\u6cd5&#xff1a;\u5148\u89c2\u5bdf\u4e2d\u65ad\u5206\u5e03\u548c NUMA \u5173\u7cfb&#xff0c;\u786e\u8ba4\u6ca1\u6709\u66f4\u5e95\u5c42\u7684\u95ee\u9898\u540e&#xff0c;\u518d\u8bc4\u4f30\u4e2d\u65ad\u5408\u5e76\u53c2\u6570\u7684\u5f71\u54cd\u3002<\/li>\n<li>\u8bef\u5224\u56db&#xff1a;\u4e1a\u52a1\u8bbf\u95ee \/dev\/mapper\/&#8230; \u5c31\u5047\u8bbe I\/O \u76f4\u63a5\u843d\u5230\u67d0\u4e2a NVMe \u63a7\u5236\u5668\u3002LVM\u3001dm-crypt\u3001Multipath \u7b49\u6620\u5c04\u8bbe\u5907\u53ef\u80fd\u628a I\/O \u5206\u6563\u5230\u591a\u4e2a\u5e95\u5c42\u8bbe\u5907&#xff0c;\u6216\u7ecf\u8fc7\u989d\u5916\u7684\u8f6f\u4ef6\u5c42\u3002\u907f\u514d\u65b9\u6cd5&#xff1a;\u5148\u7528 lsblk \u786e\u8ba4\u5757\u8bbe\u5907\u5173\u7cfb&#xff0c;\u518d\u9488\u5bf9\u5b9e\u9645\u7269\u7406\u8bbe\u5907\u8fdb\u884c\u6392\u67e5\u3002<\/li>\n<li>\u8bef\u5224\u4e94&#xff1a;\u4fee\u6539 IRQ \u4eb2\u548c\u6027\u540e\u7acb\u5373\u6d4b\u8bd5&#xff0c;\u53d1\u73b0\u6ca1\u6709\u6548\u679c\u5c31\u8ba4\u4e3a\u65b9\u6cd5\u65e0\u6548\u3002irqbalance \u53ef\u80fd\u5728\u540e\u53f0\u8986\u76d6\u624b\u5de5\u7ed1\u5b9a&#xff0c;\u6216\u8005\u5e94\u7528\u7ebf\u7a0b\u4ecd\u7136\u8fd0\u884c\u5728\u9519\u8bef\u7684 NUMA \u8282\u70b9\u4e0a\u3002\u907f\u514d\u65b9\u6cd5&#xff1a;\u5148\u505c\u6b62\u5e76\u7981\u7528 irqbalance&#xff0c;\u540c\u65f6\u628a\u5e94\u7528\u7ebf\u7a0b\u7ed1\u5b9a\u5230\u8bbe\u5907\u6240\u5728 NUMA \u8282\u70b9&#xff0c;\u518d\u91cd\u65b0\u538b\u6d4b\u9a8c\u8bc1\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3 id=\"%E5%8D%81%E3%80%81%E4%BA%92%E5%8A%A8%E4%B8%8E%E8%AE%A8%E8%AE%BA\" style=\"background-color:transparent\">\u5341\u3001\u4e92\u52a8\u4e0e\u8ba8\u8bba<\/h3>\n<p>\u8bfb\u5b8c\u672c\u6587&#xff0c;\u76f8\u4fe1\u4f60\u5df2\u7ecf\u5bf9 Linux NVMe \u4e2d\u65ad\u6392\u67e5\u4e0e NUMA \u4f18\u5316\u6709\u4e86\u7cfb\u7edf\u7684\u8ba4\u8bc6\u3002\u4e3a\u4e86\u5e2e\u52a9\u4f60\u628a\u77e5\u8bc6\u771f\u6b63\u843d\u5730&#xff0c;\u8fd9\u91cc\u7559\u51e0\u4e2a\u4e92\u52a8\u95ee\u9898&#xff0c;\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4e00\u8d77\u4ea4\u6d41&#xff1a;<\/p>\n<ul>\n<li>\u4f60\u9047\u5230\u8fc7\u4e2d\u65ad\u96c6\u4e2d\u5728\u5355\u4e2a CPU \u7684\u60c5\u51b5\u5417&#xff1f;\u5f53\u65f6\u662f\u5982\u4f55\u5b9a\u4f4d\u548c\u89e3\u51b3\u7684&#xff1f;\u662f IRQ \u4eb2\u548c\u6027\u95ee\u9898&#xff0c;\u8fd8\u662f\u5355\u7ebf\u7a0b\u8d1f\u8f7d\u7684\u6b63\u5e38\u73b0\u8c61&#xff1f;<\/li>\n<li>\u4f60\u7684\u751f\u4ea7\u73af\u5883\u961f\u5217\u6df1\u5ea6\u8bbe\u7f6e\u662f\u591a\u5c11&#xff1f;\u662f\u5426\u9488\u5bf9\u9ad8 IOPS\u3001\u9ad8\u5e26\u5bbd\u6216\u4f4e\u5ef6\u8fdf\u8d1f\u8f7d\u505a\u8fc7\u9488\u5bf9\u6027\u8c03\u4f18&#xff1f;\u8c03\u4f18\u524d\u540e\u7684 P99 \u5ef6\u8fdf\u53d8\u5316\u5982\u4f55&#xff1f;<\/li>\n<li>\u4f60\u66f4\u503e\u5411\u4e2d\u65ad\u5408\u5e76\u8fd8\u662f\u8f6e\u8be2\u6a21\u5f0f&#xff1f;\u5728\u4ec0\u4e48\u4e1a\u52a1\u573a\u666f\u4e0b\u4f60\u4f1a\u9009\u62e9\u5207\u6362&#xff0c;\u5207\u6362\u540e CPU \u5360\u7528\u548c\u5ef6\u8fdf\u8868\u73b0\u6709\u4ec0\u4e48\u53d8\u5316&#xff1f;<\/li>\n<li>\u6709\u6ca1\u6709\u8e29\u8fc7 NUMA \u76f8\u5173\u7684\u5751&#xff1f;\u6bd4\u5982\u5e94\u7528\u7ebf\u7a0b\u3001IRQ \u548c\u8bbe\u5907\u8de8\u8282\u70b9\u8bbf\u95ee\u5bfc\u81f4\u6027\u80fd\u9aa4\u964d&#xff0c;\u4f60\u662f\u5982\u4f55\u53d1\u73b0\u5e76\u89e3\u51b3\u7684&#xff1f;<\/li>\n<\/ul>\n<p>\u5982\u679c\u4f60\u5728\u5b9e\u6218\u4e2d\u9047\u5230\u4e86\u672c\u6587\u6ca1\u6709\u8986\u76d6\u5230\u7684 NVMe \u6027\u80fd\u95ee\u9898&#xff0c;\u6216\u8005\u5bf9\u67d0\u4e2a\u547d\u4ee4\u7684\u8f93\u51fa\u6709\u7591\u95ee&#xff0c;\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u3002\u6211\u4f1a\u6839\u636e\u5927\u5bb6\u7684\u53cd\u9988&#xff0c;\u7ee7\u7eed\u8865\u5145\u66f4\u591a\u5b9e\u6218\u6848\u4f8b\u548c\u6392\u67e5\u6280\u5de7\u3002<\/p>\n<p>\u89c9\u5f97\u672c\u6587\u6709\u5e2e\u52a9\u7684\u8bdd&#xff0c;\u4e0d\u59a8\u70b9\u4e2a\u8d5e\u3001\u6536\u85cf\u5e76\u5206\u4eab\u7ed9\u540c\u6837\u5728\u505a\u5b58\u50a8\u6027\u80fd\u4f18\u5316\u7684\u670b\u53cb&#xff0c;\u8ba9\u66f4\u591a\u4eba\u5c11\u8d70\u5f2f\u8def\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u5f15\u8a00<br \/>\n\u4e00\u3001\u5148\u5efa\u7acb\u6b63\u786e\u7684\u6392\u67e5\u601d\u8def<br \/>\n\u4e8c\u3001\u51c6\u5907\u5de5\u5177\u4e0e\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<br \/>\n\u5b89\u5168\u6ce8\u610f\u4e8b\u9879<br \/>\n\u4e09\u3001\u8bc6\u522b NVMe \u63a7\u5236\u5668\u548c PCIe \u5730\u5740<br \/>\n1. \u67e5\u770b NVMe \u8bbe\u5907<br \/>\n2. \u83b7\u53d6 PCIe BDF \u5730\u5740<br \/>\n3. \u786e\u8ba4\u4e0a\u5c42\u8bbe\u5907\u662f\u5426\u7ecf\u8fc7\u5176\u4ed6\u5757\u8bbe\u5907<br \/>\n\u56db\u3001\u68c0\u67e5 PCIe \u94fe\u8def\u662f\u5426\u6b63\u5e38<br \/>\n\u4e94\u3001\u786e\u8ba4 MSI-X \u662f\u5426\u542f\u7528<br \/>\n1. \u67e5\u770b MSI-X \u80fd\u529b<br \/>\n2. \u67e5\u770b\u8bbe\u5907\u5b9e\u9645\u5206\u914d\u7684 IRQ<br \/>\n\u516d\u3001\u67e5\u770b NVMe \u4e2d\u65ad\u5206\u5e03<br \/>\n1. \u67e5\u770b \/proc\/interrupts<br \/>\n2. \u53ea\u67e5\u770b\u76ee\u6807\u8bbe<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[12551,9148,58,56,44],"topic":[],"class_list":["post-113576","post","type-post","status-publish","format-standard","hentry","category-server","tag-nvme","tag-pcie","tag-linux","tag-56","tag-44"],"yoast_head":"<!-- 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