{"id":478,"date":"2026-09-28T11:43:04","date_gmt":"2026-09-28T03:43:04","guid":{"rendered":"https:\/\/lovelyping.com\/?p=478"},"modified":"2026-09-28T11:43:04","modified_gmt":"2026-09-28T03:43:04","slug":"f-stack-2-0-%e5%89%8d%e7%9e%bb8-%ef%bc%9a%e7%94%a8%e6%88%b7%e6%80%81-%e5%8d%8f%e8%ae%ae%e6%a0%88%e9%97%b4%e7%9a%84%e9%9b%b6%e6%8b%b7%e8%b4%9d%ef%bc%8c%e4%bb%8e%e9%ad%94%e6%94%b9%e5%88%b0-freebsd","status":"publish","type":"post","link":"https:\/\/lovelyping.com\/?p=478","title":{"rendered":"F-Stack 2.0 \u524d\u77bb8 \uff1a\u7528\u6237\u6001\/\u534f\u8bae\u6808\u95f4\u7684\u96f6\u62f7\u8d1d\uff0c\u4ece\u9b54\u6539\u5230 FreeBSD \u539f\u751f sosend \u5bf9\u79f0\u67b6\u6784"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1. \u672c\u529f\u80fd\u4e3b\u8981\u4f5c\u7528\u548c\u7279\u70b9<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u7bc7\u53ea\u8bb2 F-Stack \u7684\u7528\u6237\u6001\u4e0e\u534f\u8bae\u6808\u4e4b\u95f4\u4e00\u76f4\u6709\u7684&#8221;\u6700\u540e\u4e00\u516c\u91cc&#8221;\u7684\u5185\u5b58\u62f7\u8d1d\u95ee\u9898\uff0c\u4e0d\u6d89\u53ca\u5176\u4ed6\u5c42\u7684\u96f6\u62f7\u8d1d\uff0c\u8fd9\u7bc7\u628a\u96f6\u62f7\u8d1d\u4ece 2018 \u5e74\u5230 2026 \u5e74\u7684\u6f14\u8fdb\u634b\u4e00\u904d\u2014\u2014\u65e9\u671f\u53cc\u5411\u90fd\u6709\u5185\u5b58\u62f7\u8d1d\uff0c2022 \u5e74\u6709\u4e86\u53d1\u9001\u65b9\u5411\u7684\u9b54\u6539\u65b9\u6848\uff0c2026 \u5e74 6 \u6708\u7ec8\u4e8e\u6536\u655b\u6210&#8221;\u53cc\u5411\u5bf9\u79f0\u3001\u7eaf\u539f\u751f&#8221;\u7684\u5b8c\u6574\u7528\u6237\u6001\u96f6\u62f7\u8d1d\u6808\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u62f7\u8d1d\u53d1\u751f\u5728\u54ea\u5148\u641e\u6e05\u695a\u3002\u6570\u636e\u5305\u5728\u670d\u52a1\u5668\u7684\u5904\u7406\u5206\u63a5\u6536\u548c\u53d1\u9001\u4e24\u4e2a\u65b9\u5411\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u63a5\u6536\u65b9\u5411<\/strong>\uff1a\u7f51\u5361 \u2192 DPDK hugepage \u662f DMA\uff0c\u5929\u7136\u96f6\u62f7\u8d1d\uff1b\u4f46\u5e94\u7528\u8c03 <code>ff_read()<\/code> \u628a\u6570\u636e\u4ece\u534f\u8bae\u6808 mbuf \u642c\u5230\u7528\u6237 buffer \u6709\u4e00\u6b21\u62f7\u8d1d\uff08issue #407 \u5b98\u65b9\u786e\u8ba4\uff0c\u8fd9\u662f\u8bbe\u8ba1\u5982\u6b64\uff09<\/li><li><strong>\u53d1\u9001\u65b9\u5411<\/strong>\uff1a\u6709\u4e24\u5904\u62f7\u8d1d\u2014\u2014\u5e94\u7528\u5c42\u8c03\u7528 socket \u53d1\u9001\u63a5\u53e3\u65f6\u6570\u636e\u4ece\u5e94\u7528\u5c42\u62f7\u5230 FreeBSD \u534f\u8bae\u6808\uff08\u5e94\u7528 \u2192 \u534f\u8bae\u6808\uff09\uff0c\u4ee5\u53ca\u534f\u8bae\u6808\u628a\u6570\u636e\u62f7\u5230 DPDK rte_mbuf\uff08\u534f\u8bae\u6808 \u2192 \u7f51\u5361\uff09<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">2026 \u5e74 6 \u6708\u4e4b\u524d\uff0cF-Stack \u96f6\u62f7\u8d1d\u7684\u7248\u56fe\u662f\u8fd9\u6837\u7684\uff1a\u63a5\u6536\u65b9\u5411\u96f6\u62f7\u8d1d\uff08FF_ZC_RECV\uff09\u53ea\u6709\u7a7a\u63a5\u53e3\uff0c\u672a\u5b9e\u9645\u5b9e\u73b0\uff0c\u57282026-06-11\u901a\u8fc7FreeBSD\u6e90\u751f\u63a5\u53e3\u5b9e\u73b0\u4e86\u63a5\u53d7\u65b9\u5411\u96f6\u62f7\u8d1d\u7684\u5b9e\u9645\u5b9e\u73b0\uff08commit b87f5f0d2\uff09\uff1b\u53d1\u9001\u65b9\u5411\u96f6\u62f7\u8d1d\uff08FF_ZC_SEND\uff09\u7528\u7684\u662f FSTACK_ZC_MAGIC \u54e8\u5175 + m_uiotombuf \u5185\u6838\u9b54\u6539\u7684 workaround\u2014\u2014\u80fd\u8dd1\u4f46\u6709 GPF \u98ce\u9669\u3001\u5927\u6570\u636e\u91cf\u53d1\u9001 crash\u3001FreeBSD \u5347\u7ea7\u65f6\u7ef4\u62a4\u6210\u672c\u9ad8\u30022026-06-12 \u7684\u539f\u751f\u5316\u91cd\u6784\uff08commit b6ce5884c\uff09\u628a\u53d1\u9001\u65b9\u5411\u4e5f\u6362\u6210\u4e86 FreeBSD 15.0 \u539f\u751f\u7684 <code>sosend(top)<\/code> \u8def\u5f84\uff0c\u81f3\u6b64\u5f62\u6210\u5b8c\u5168\u5bf9\u79f0\u7684\u53cc\u5411\u96f6\u62f7\u8d1d\u6808\u3002\u51e0\u4e2a\u5173\u952e\u8bcd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u53cc\u5411\u5bf9\u79f0<\/strong>\uff1aZC-send\uff08<code>kern_zc_sendit<\/code> + sosend top\uff09\u4e0e ZC-recv\uff08<code>kern_zc_recvit<\/code> + soreceive mp0\uff09\u5728\u5185\u6838\u5165\u53e3\u3001\u7528\u6237\u6001 API\u3001\u751f\u547d\u5468\u671f\u3001\u9519\u8bef\u8def\u5f84\u3001ABI \u589e\u91cf\u4e94\u4e2a\u7ef4\u5ea6\u5168\u955c\u50cf<\/li><li><strong>\u7eaf\u539f\u751f<\/strong>\uff1a\u76f4\u63a5\u590d\u7528 FreeBSD 15.0 \u4e0a\u6e38\u80fd\u529b\u2014\u2014<code>sosend(9)<\/code> \u624b\u518c\u539f\u6587\u5c31\u5199\u7740&#8221;Data may be sent as an mbuf chain via top, avoiding a data copy&#8221;\uff0cf-stack \u53ea\u662f\u8865\u4e86\u4e00\u4e2a\u628a top \u8d2f\u901a\u8fdb sosend \u7684\u5165\u53e3<\/li><li><strong>\u62c6\u9664\u9b54\u6539<\/strong>\uff1aFSTACK_ZC_MAGIC \u54e8\u5175 + m_uiotombuf \u9b54\u6539\u5171 17 \u5904\u89e6\u70b9\u5168\u90e8\u62c6\u9664\uff0cm_uiotombuf \u56de\u5f52 vanilla 15.0 \u7248\u672c\uff0c\u5185\u6838 patch \u4ece&#8221;5 \u5904\u9b54\u6539&#8221;\u53d8\u6210&#8221;\u53ea\u65b0\u589e 1 \u4e2a\u51fd\u6570&#8221;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u672c\u529f\u80fd\u7684\u4e3b\u8981\u9002\u7528\u573a\u666f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \u5927\u5757\u6570\u636e\u6536\u53d1\u573a\u666f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u96f6\u62f7\u8d1d\u6700\u5b9e\u5728\u7684\u6536\u76ca\u573a\u666f\u3002M2 \u5b9e\u6d4b\u5df2\u7ecf\u8bc1\u660e\uff1a\u5c0f\u5305 echo\uff08256B \u8bf7\u6c42\/438B \u5e94\u7b54\uff09\u4e0b ZC \u4e0e\u666e\u901a read\/write \u6301\u5e73\u2014\u2014\u5c0f\u8bf7\u6c42\u7684 <code>uiomove<\/code> \u62f7\u8d1d\u5f00\u9500\u76f8\u5bf9 TCP \u5904\u7406 + syscall + \u8c03\u5ea6\u53ef\u4ee5\u5ffd\u7565\uff0c\u4e14 f-stack \u7528 UIO_SYSSPACE\uff0cuiomove \u672c\u5c31\u662f\u540c\u5730\u5740\u7a7a\u95f4 memcpy\uff0c\u5df2\u7ecf\u5f88\u5ec9\u4ef7\u3002\u771f\u6b63\u7684\u6536\u76ca\u5728 4KB\/64KB\/1MB \u7ea7 payload\uff1a\u5927\u6587\u4ef6\u4e0b\u8f7d\u3001\u5927 body POST\u3001\u5757\u5b58\u50a8\u7c7b\u4e1a\u52a1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 \u4ee3\u7406\u8f6c\u53d1\u573a\u666f\uff08\u6536\u5230\u5373\u8f6c\u53d1\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8f6c\u53d1\u7c7b\u5e94\u7528\uff08\u4ee3\u7406\u3001\u7f51\u5173\uff09\u6536\u5230\u6570\u636e\u540e\u539f\u6837\u53d1\u51fa\u53bb\uff0c\u4f20\u7edf\u8def\u5f84\u662f recv \u62f7\u8fdb\u7528\u6237 buffer \u518d send \u62f7\u56de\u534f\u8bae\u6808\uff0c\u4e24\u8d9f\u62f7\u8d1d\uff1bZC \u8def\u5f84\u4e0b recv \u62ff\u5230 mbuf \u94fe\u3001send \u76f4\u63a5\u6295\u9012 mbuf \u94fe\uff0c\u5168\u7a0b\u96f6\u62f7\u8d1d\u3002\u8fd9\u662f spec \u91cc\u660e\u786e\u6807\u6ce8\u7684\u4f18\u5148\u6536\u76ca\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 \u4e0e FF_USE_PAGE_ARRAY \u7684\u5173\u7cfb\uff08\u8981\u8bf4\u6e05\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">FF_USE_PAGE_ARRAY \u662f 2020 \u5e74 PR #364 \u8d21\u732e\u7684&#8221;\u534f\u8bae\u6808 \u2192 DPDK&#8221;\u65b9\u5411\u96f6\u62f7\u8d1d\uff08mmap + mlock + virt2phy \u67e5\u627e\uff09\uff0c\u4e0e\u8fd9\u7bc7\u8bb2\u7684\u5e94\u7528\u5c42\u96f6\u62f7\u8d1d\u662f\u4e24\u6bb5\u4e0d\u540c\u7684\u62f7\u8d1d\u3002\u5b83\u81f3\u4eca\u4ecd\u662f\u5b9e\u9a8c\u6027\u7279\u6027\uff1aissue \u6863\u6848\u786e\u8ba4\u5b83\u5728 i40e \u4e0b\u4f1a\u9759\u9ed8\u4e22\u5305\uff0c\u5b98\u65b9\u4e0d\u5efa\u8bae\u542f\u7528\uff1bPhase-2 \u5b9e\u6d4b\u8fd8\u89e6\u53d1\u8fc7 panic\uff08F-A1\uff0c\u5df2\u4fee\u590d\u4e3a soft drop\uff09\u3002\u4e09\u8005\u5f00\u5173\u5b8c\u5168\u72ec\u7acb\uff0c\u53ef\u4efb\u610f\u7ec4\u5408\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.4 \u4e0d\u592a\u9002\u5408\u7684\u573a\u666f<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5c0f\u5305 echo \u7c7b\u8d1f\u8f7d\uff1a\u5b9e\u6d4b\u96f6\u6536\u76ca\uff0c\u76f4\u63a5\u5f00\u8fd8\u4f1a\u591a\u4e00\u5c42 API \u590d\u6742\u5ea6<\/li><li>\u4f9d\u8d56\u589e\u91cf\u7f16\u8bd1\u7684\u5feb\u901f\u8fed\u4ee3\u73af\u5883\uff1aFF_ZC_* \u5f00\u5173\u5207\u6362\u540e\u5fc5\u987b make clean\uff0c\u5426\u5219\u4f1a\u8e29 M2 \u7684 http=000 \u5751\uff08\u89c1 4.3\uff09<\/li><li>\u671f\u5f85\u6027\u80fd\u7ffb\u500d\u7684\uff1a2022 \u5e74\u5b98\u65b9\u516c\u4f17\u53f7\u6587\u7ae0\u5c31\u8bf4\u8fc7\uff0c\u6027\u80fd\u63d0\u5347&#8221;\u5e76\u4e0d\u4e00\u5b9a\u5f88\u660e\u663e\uff0c\u6bd4\u5982\u53ea\u6709 2-3% \u5de6\u53f3\u7684\u63d0\u5347&#8221;\u2014\u2014\u96f6\u62f7\u8d1d\u7701\u7684\u662f memcpy\uff0c\u4e0d\u662f\u534f\u8bae\u6808\u672c\u8eab\u7684\u5f00\u9500<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u672c\u529f\u80fd\u7684\u67b6\u6784\u7279\u5f81<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 \u4e09\u6761\u53d1\u9001\u8def\u5f84\u5bf9\u6bd4\uff08\u6838\u5fc3\u56fe\uff09<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"705\" src=\"https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc1-1024x705.png\" alt=\"\" class=\"wp-image-479\" srcset=\"https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc1-1024x705.png 1024w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc1-300x207.png 300w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc1-768x529.png 768w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc1.png 1694w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u65b9\u6848\u6ca1\u6709 magic\u3001\u6ca1\u6709 uio_offset \u900f\u4f20\u3001ff_write\/ff_writev \u4e0d\u9700\u8981 opt-out\u3002sosend \u5168\u6bb5\u7ecf\u8fc7\u5b9e\u6d4b\u786e\u8ba4\u65e0\u4efb\u4f55 FSTACK_* \u5b8f\u2014\u2014\u8fd9\u662f FreeBSD \u4e0a\u6e38\u539f\u751f\u80fd\u529b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 \u63a5\u6536\u65b9\u5411\u5bf9\u79f0\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"810\" src=\"https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc2-1024x810.png\" alt=\"\" class=\"wp-image-480\" srcset=\"https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc2-1024x810.png 1024w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc2-300x237.png 300w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc2-768x608.png 768w, https:\/\/lovelyping.com\/wp-content\/uploads\/2026\/09\/08-zc2.png 1164w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 \u53cc\u5411\u5bf9\u79f0\u8868\uff08\u4e94\u7ef4\u955c\u50cf\uff09<\/h3>\n\n\n\n<table class=\"wp-block-table\"><thead><tr><th>\u7ef4\u5ea6<\/th><th>ZC-recv\uff08\u5df2\u843d\u5730\uff09<\/th><th>ZC-send\uff08\u539f\u751f\u5316\u540e\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u5185\u6838\u5165\u53e3<\/td><td><code>kern_zc_recvit<\/code> \u2192 <code>soreceive(mp0)<\/code><\/td><td><code>kern_zc_sendit<\/code> \u2192 <code>sosend(top)<\/code><\/td><\/tr><tr><td>\u539f\u751f\u673a\u5236<\/td><td>soreceive \u7684 <code>mp0!=NULL<\/code> \u5206\u652f<\/td><td>sosend \u7684 <code>uio==NULL &amp;&amp; top!=NULL<\/code> \u5206\u652f<\/td><\/tr><tr><td>\u957f\u5ea6\u6765\u6e90<\/td><td><code>uio-&gt;uio_resid<\/code><\/td><td><code>top-&gt;m_pkthdr.len<\/code><\/td><\/tr><tr><td>\u7ed5\u8fc7\u70b9<\/td><td>uiomove \u62f7\u8d1d<\/td><td>m_uiotombuf \u5206\u914d+\u62f7\u8d1d<\/td><\/tr><tr><td>\u7528\u6237\u6001 API<\/td><td><code>ff_zc_recv<\/code> \/ <code>ff_zc_mbuf_segment<\/code> \/ <code>ff_zc_recv_free<\/code><\/td><td><code>ff_zc_send<\/code> \/ <code>ff_zc_mbuf_get<\/code> \/ <code>ff_zc_mbuf_write<\/code><\/td><\/tr><tr><td>ABI \u589e\u91cf<\/td><td>+3 \u7b26\u53f7<\/td><td>0 \u7b26\u53f7\uff08\u53ea\u6539\u5b9e\u73b0\uff09<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u8fb9\u5171\u4eab\u540c\u4e00\u4e2a <code>struct ff_zc_mbuf<\/code>\uff08bsd_mbuf\/bsd_mbuf_off\/off\/len \u56db\u5b57\u6bb5\uff09\uff0c\u5b57\u6bb5\u8bed\u4e49\u5bf9\u79f0\u590d\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u5177\u4f53\u505a\u4e86\u54ea\u4e9b\u6539\u9020\u3001\u9047\u5230\u4e86\u54ea\u4e9b\u95ee\u9898\u3001\u600e\u4e48\u89e3\u51b3\u7684<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u540e\u7eed\u6bd4\u8f83\u67af\u71e5\uff0c\u4e0d\u9700\u8981\u6df1\u5165\u7814\u7a76\u5b9e\u73b0\u8fc7\u7a0b\u7684\u53ef\u4ee5\u8df3\u8fc7\u672c\u8282\uff0c\u76f4\u63a5\u770b\u7b2c 5 \u8282\u600e\u4e48\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 \u65e9\u671f\u65b9\u6848\u56de\u987e\uff082018~2022\uff0c\u6700\u65e9\u671f\u6587\u6863\u5230\u73b0\u5728\u7248\u672c\u7684\u533a\u522b\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">2018 \u5e74\u7684\u57fa\u7ebf\uff08issue #407\uff09\uff1a\u63a5\u6536\u65b9\u5411\u7f51\u5361\u5230 hugepage \u96f6\u62f7\u8d1d\u3001\u4f46 <code>ff_read()<\/code> \u6709\u62f7\u8d1d\uff1b\u53d1\u9001\u65b9\u5411&#8221;\u662f\u62f7\u8d1d\u7684&#8221;\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2020 \u5e74 PR #364\uff08@jinhao2\uff09\u8865\u4e86\u7b2c\u4e00\u6bb5\uff1aFF_USE_PAGE_ARRAY\uff0c\u534f\u8bae\u6808 \u2192 DPDK \u65b9\u5411\u96f6\u62f7\u8d1d\u3002\u601d\u8def\u662f\u521d\u59cb\u5316\u65f6 mmap 256MB\uff08memsz_MB \u53ef\u8c03\uff09+ mlock \u9501\u7269\u7406\u5185\u5b58\uff0c\u7ef4\u62a4\u865a\u62df\u5730\u5740\u2192\u7269\u7406\u5730\u5740\u9875\u8868\uff0c\u534f\u8bae\u6808 mbuf \u6570\u636e\u5730\u5740\u843d\u5728\u6c60\u5185\u65f6\u76f4\u63a5\u628a\u7269\u7406\u5730\u5740\u586b\u7ed9 rte_mbuf \u7684 buf_addr\/buf_physaddr\uff0c\u4e0d\u62f7\u8d1d\uff1b\u7528\u957f\u5ea6\u7b49\u4e8e NIC tx_queue_length \u7684\u5faa\u73af\u961f\u5217\u4fdd\u8bc1\u91ca\u653e\u5b89\u5168\u3002\u8fd9\u4e2a\u65b9\u6848\u5bf9\u5e94\u7528\u900f\u660e\uff0c\u4f46\u5bf9 ixgbe \u6709\u6548\u3001i40e \u4e0b\u9759\u9ed8\u4e22\u5305\uff0c\u81f3\u4eca\u5b98\u65b9\u5b9a\u4f4d\u4ecd\u662f&#8221;\u4ece\u672a\u6b63\u5f0f\u542f\u7528\u7684\u5b9e\u9a8c\u7279\u6027&#8221;\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2022-04-15\uff08commit e12886c\/021aaded\uff09\u8865\u4e86\u7b2c\u4e8c\u6bb5\uff1aFF_ZC_SEND\uff0c\u5e94\u7528 \u2192 \u534f\u8bae\u6808\u65b9\u5411\u96f6\u62f7\u8d1d\u3002<code>ff_zc_mbuf_get()<\/code> \u7528 m_getm2 \u5206\u914d mbuf \u94fe\u5f53\u5e94\u7528\u7f13\u5b58\u3001<code>ff_zc_mbuf_write()<\/code> \u76f4\u63a5\u5199\u8fdb mbuf\u3001<code>ff_write(fd, zc_buf.bsd_mbuf, len)<\/code> \u65f6\u5728 m_uiotombuf \u91cc\u76f4\u63a5\u91c7\u7528\u4f20\u5165\u7684 mbuf \u94fe\u8df3\u8fc7\u62f7\u8d1d\u3002\u914d\u5957\u516c\u4f17\u53f7\u6587\u7ae0\u300aF-STACK\u53d1\u9001\u96f6\u62f7\u8d1d\u4ecb\u7ecd\u300b\u5982\u5b9e\u8bf4\u660e\uff1a\u9884\u671f\u6027\u80fd\u63d0\u5347\u7ea6 2-3%\uff0c&#8221;\u9700\u8981\u7ed3\u5408\u5b9e\u9645\u573a\u666f\u6d4b\u8bd5&#8221;\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 M8 \u91cd\u65b0\u70b9\u4eae\uff1aFSTACK_ZC_MAGIC \u54e8\u5175\u65b9\u6848\uff082026-06-08\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">FreeBSD 13\u219215 \u5347\u7ea7\u7684 Phase-2 \u628a FF_ZC_SEND \u5728 15.0 \u57fa\u7ebf\u4e0a\u91cd\u65b0\u70b9\u4eae\uff08commit add33a04a\uff09\u300213.0 \u65f6\u4ee3\u7684\u76f4\u4f20\u65b9\u5f0f\u5728 15.0 \u4e0b\u6709\u4e86\u53d8\u5316\uff0c\u843d\u5730\u6210\u4e86\u54e8\u5175\u65b9\u6848\uff1a<code>ff_zc_send<\/code> \u628a mbuf \u94fe\u4f2a\u88c5\u6210 char* \u585e\u8fdb iov_base\uff0c\u540c\u65f6\u5f80 <code>uio-&gt;uio_offset<\/code> \u6ce8\u5165\u9b54\u6570 <code>0xF8AC2C00F8AC2C00<\/code>\uff1bdofilewrite \u91cc\u52a0\u5b88\u62a4\uff08\u975e\u9b54\u6570\u624d\u8986\u5199 offset\uff09\uff1bm_uiotombuf \u91cc\u52a0\u6d88\u8d39\u70b9\uff08\u68c0\u6d4b\u5230\u9b54\u6570\u5c31\u628a iov_base \u91cd\u65b0\u89e3\u91ca\u4e3a mbuf \u94fe\uff09\u3002\u5185\u6838 5 \u5904\u9b54\u6539\uff0c\u666e\u901a ff_write\/ff_writev \u5fc5\u987b\u663e\u5f0f <code>uio_offset=0<\/code> opt-out \u9632\u6b62\u649e\u4e0a\u9b54\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u65b9\u6848\u4ece\u843d\u5730\u7b2c\u4e00\u5929\u5c31\u5e26\u7740\u4e09\u4e2a\u5305\u88b1\uff1aM8 \u9636\u6bb5\u66fe\u56e0 opt-out \u7f3a\u5931\u76f4\u63a5 GPF\uff08ff_syscall_wrapper.c:1146 \u7684 RCA\uff09\uff1bissue #712\uff082022-11-01 \u81f3\u4eca OPEN\uff09\u5927\u6570\u636e\u91cf\u53d1\u9001 crash\/hang \u65e0\u89e3\uff1b\u6bcf\u6b21 FreeBSD \u5347\u7ea7\u90fd\u8981\u91cd\u65b0\u5ba1\u8ba1 m_uiotombuf \u5468\u8fb9\u7ea6 120 \u884c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 \u95ee\u9898\u4e00\uff1a\u589e\u91cf\u7f16\u8bd1\u9677\u9631\uff0chttp=000\uff08M2 \u6559\u8bad\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">2026-06-11 \u505a ZC-recv \u7684 M2 \u5b9e\u6d4b\u65f6\uff0c\u9996\u8f6e curl \u5168\u90e8 http=000\uff0c\u4e00\u5ea6\u8bef\u5224\u4e3a\u73af\u5883\u95ee\u9898\u3002\u5b9e\u9645\u8c03\u8bd5\u5b9a\u4f4d\u5230\u771f\u51f6\uff1a\u5148\u505a\u4e86\u65e0 flag \u7684 baseline build\uff0c\u518d <code>FF_ZC_SEND=1 make<\/code>\uff0cuipc_mbuf.c \u6ca1\u6539\u8fc7\u3001\u5b83\u7684 .o \u6bd4 .c \u65b0\uff0cmake \u6309\u65f6\u95f4\u6233\u8df3\u8fc7\u91cd\u7f16\u8bd1\u2014\u2014m_uiotombuf \u91cc\u7684 MAGIC \u6d88\u8d39 hook \u7f3a\u5931\uff08objdump \u9a8c\u8bc1 magic \u4e0d\u5728 uipc_mbuf.o \u91cc\uff09\u3002\u540e\u679c\uff1aff_zc_send \u8bbe\u4e86\u9b54\u6570\u4f46\u5185\u6838 hook \u4e0d\u8bc6\u522b\uff0cmbuf \u94fe\u6307\u9488\u88ab\u5f53 char buffer \u5904\u7406\uff0c\u5e94\u7b54\u5d29\u574f\u3002\u5220 stale .o \u91cd\u7f16\u8bd1\u540e http=200 \u5168\u901a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3010\u6ce81\u3011\u8fd9\u4e2a\u5751\u4ece\u6b64\u8fdb\u4e86\u5f3a\u5236\u89c4\u7ea6\uff1a\u53d8\u66f4 FF_ZC_* \u7b49\u7f16\u8bd1\u5f00\u5173\u540e\u5fc5\u987b make clean \u6216\u5220\u9664\u53d7\u5f71\u54cd .o\uff0cmake \u57fa\u4e8e\u65f6\u95f4\u6233\u4e0d\u611f\u77e5 CFLAGS \u53d8\u5316\u3002\u8fd9\u4e5f\u662f\u54e8\u5175\u65b9\u6848\u7684\u56fa\u6709\u8106\u5f31\u6027\u2014\u2014\u9b54\u6539\u6587\u4ef6\u8d8a\u591a\uff0cstale .o \u7684\u7ec4\u5408\u7206\u70b8\u9762\u8d8a\u5927\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.4 ZC-recv \u843d\u5730\u4e0e\u8c03\u7814\u8f6c\u5411\uff082026-06-11\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u4e00\u5929 ZC-recv \u843d\u5730\uff08commit b87f5f0d2\uff0cM0+M1\uff09\uff1a\u65b0\u589e <code>kern_zc_recvit<\/code> \u900f\u4f20 soreceive \u7684\u539f\u751f <code>mp0<\/code> \u51fa\u53c2\uff0c\u7528\u6237\u6001\u65b0\u589e ff_zc_recv\/ff_zc_mbuf_segment\/ff_zc_recv_free \u4e09\u4e2a API\u3002\u5b83\u53ea\u65b0\u589e\u4e0d\u9b54\u6539\uff0csoreceive \u6838\u5fc3\u96f6\u6539\u52a8\u3002M2 \u5b9e\u6d4b\uff08\u5355\u6838 A\/B \u4e09\u6863 wrk\uff09\uff1aT1 \u22121.1%\u3001T2 \u2248 +3%\u3001T3 \u22121.0%\uff0c\u5c0f\u5305 echo \u4e0b\u4e0e ff_read \u6301\u5e73\uff08\u566a\u58f0\u5185\uff09\u2014\u2014\u8bda\u5b9e\u7684\u7ed3\u8bba\u662f\u6536\u76ca\u5728\u5927 payload \u573a\u666f\uff0cecho \u8d1f\u8f7d\u4f53\u73b0\u4e0d\u51fa\u6765\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u66f4\u91cd\u8981\u7684\u662f\uff0c\u505a ZC-recv \u7684\u540c\u65f6\u987a\u624b\u8c03\u7814\u4e86\u53d1\u9001\u4fa7\uff1aFreeBSD 15.0 \u7684 <code>sosend()<\/code> \u7b7e\u540d\u91cc\u4e00\u76f4\u5e26\u7740 <code>top<\/code>\uff08mbuf \u94fe\uff09\u53c2\u6570\uff0c<code>uio==NULL &amp;&amp; top!=NULL<\/code> \u65f6\u76f4\u63a5\u6295\u9012 mbuf \u94fe\u3001\u8df3\u8fc7 m_uiotombuf\u3002\u8c03\u7814\u5b9e\u6d4b\u786e\u8ba4 sosend \u5168\u6bb5\u65e0\u4efb\u4f55 FSTACK_* \u5b8f\uff08git blame \u663e\u793a f-stack \u7684 delta \u4e0d\u5728\u90a3\u91cc\uff09\u2014\u2014<strong>\u4e0a\u6e38\u539f\u751f\u80fd\u529b\u4e00\u76f4\u5728\uff0cf-stack \u7684 MAGIC \u65b9\u6848\u662f\u628a mbuf \u4f2a\u88c5\u6210 uio \u7ed5\u884c\uff0c\u5c5e\u4e8e&#8221;\u975e\u5fc5\u8981\u91cd\u65b0\u53d1\u660e&#8221;<\/strong>\u3002\u7f3a\u7684\u53ea\u662f\u4e00\u4e2a\u628a top \u4ece\u7528\u6237\u6001\u8d2f\u901a\u8fdb sosend \u7684\u5165\u53e3\uff08\u6536\u4fa7 mp0 \u88ab\u5199\u6b7b NULL \u5b8c\u5168\u540c\u6784\uff0ckern_zc_recvit \u5df2\u7ecf\u793a\u8303\u4e86\u600e\u4e48\u505a\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.5 \u539f\u751f\u5316\u91cd\u6784\uff1akern_zc_sendit\uff082026-06-12\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b9\u6848\u5b9a\u4e86\u4ee5\u540e\u4e00\u5929\u843d\u5730\uff08commit b6ce5884c\uff09\uff1a\u65b0\u589e <code>kern_zc_sendit(td, s, top, flags)<\/code> \u76f4\u8c03 <code>sosend(so, NULL, NULL, top, NULL, flags, td)<\/code>\uff0c\u540c\u65f6\u628a\u9b54\u6539\u5168\u90e8\u62c6\u9664\u2014\u201417 \u5904\u89e6\u70b9\u91cc\uff0cmbuf.h \u7684 MAGIC \u5b8f\u3001m_uiotombuf \u7684 ZC \u5206\u652f\u3001dofilewrite \u7684\u5b88\u62a4\u3001ff_write\/ff_writev \u7684 opt-out \u5171 5 \u5904 DELETE\uff0cm_uiotombuf \u56de\u5f52 vanilla 15.0 \u7248\u672c\uff1bff_zc_send \u91cd\u5199\u4e3a\u8c03\u7528 kern_zc_sendit\uff1bff_zc_mbuf_get\/write \u4fee\u590d M_PKTHDR \u7f3a\u53e3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M_PKTHDR \u7f3a\u53e3\u662f\u8fd9\u4e2a\u65b9\u6848\u7684\u6280\u672f\u524d\u63d0\uff0c\u503c\u5f97\u5c55\u5f00\uff1asosend \u7684 uio==NULL \u5206\u652f\u7528 <code>top-&gt;m_pkthdr.len<\/code> \u4f5c\u4e3a resid\uff08\u6570\u636e\u957f\u5ea6\uff09\uff0c\u800c\u65e7\u7684 ff_zc_mbuf_get \u7528 <code>m_getm2(..., flags=0)<\/code> \u5206\u914d\u7684\u94fe\u5934<strong>\u4e0d\u5e26 M_PKTHDR<\/strong>\uff0cff_zc_mbuf_write \u91cc\u7ef4\u62a4 pkthdr.len \u7684\u4ee3\u7801\u88ab\u6ce8\u91ca\u6389\u4e86\u2014\u2014\u76f4\u63a5\u8d70\u539f\u751f\u8def\u5f84\u4f1a resid=0 \u4ec0\u4e48\u90fd\u53d1\u4e0d\u51fa\u53bb\u3002\u4fee\u590d\u662f\u4e24\u884c\u7684\u4e8b\uff1a\u5206\u914d\u65f6\u52a0 M_PKTHDR\u3001\u5199\u5165\u65f6\u7d2f\u52a0 pkthdr.len\uff0c\u4f46\u8fd9\u4e24\u884c\u662f&#8221;\u539f\u751f\u80fd\u529b\u53ef\u7528&#8221;\u548c&#8221;\u9759\u9ed8\u4e0d\u53d1\u6570\u636e&#8221;\u7684\u5206\u6c34\u5cad\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3010\u6ce82\u3011ABI \u4e0d\u53d8\u6027\u662f\u8fd9\u6b21\u91cd\u6784\u7684\u5408\u540c\uff1aff_zc_send\/ff_zc_mbuf_get\/ff_zc_mbuf_write \u7b7e\u540d\u96f6\u4fee\u6539\u3001example\/main_zc.c \u8c03\u7528\u5e8f\u5217\u96f6\u4fee\u6539\uff08G4 \u9a8c\u6536\u6761\u6b3e\u5c31\u662f diff \u5b83 0 \u884c\u53d8\u5316\uff09\u3001FF_ZC_SEND \u5f00\u5173\u540d\u4fdd\u7559\u4f46\u542b\u4e49\u4ece&#8221;\u9b54\u6539\u542f\u7528&#8221;\u5207\u6362\u4e3a&#8221;\u539f\u751f\u8def\u5f84\u542f\u7528&#8221;\u3001\u5bfc\u51fa\u7b26\u53f7\u4e0d\u589e\u4e0d\u51cf\u3002\u5bf9\u5df2\u90e8\u7f72\u9879\u76ee\u552f\u4e00\u8981\u6c42\u662f make clean \u540e\u91cd\u7f16\u8bd1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.6 \u884c\u4e3a\u53d8\u5316\uff08\u5bf9\u7528\u6237\u53ef\u611f\u77e5\u7684\uff09<\/h3>\n\n\n\n<table class=\"wp-block-table\"><thead><tr><th>\u9879<\/th><th>\u65e7\uff08\u9b54\u6539\uff09<\/th><th>\u65b0\uff08\u539f\u751f\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u5927\u6570\u636e\uff08&gt;SO_SNDBUF\uff09\u53d1\u9001<\/td><td>crash\/hang\uff08issue #712\uff09<\/td><td>\u963b\u585e\u6216\u975e\u963b\u585e\u8fd4 EWOULDBLOCK\uff0c\u8c03\u7528\u65b9\u81ea\u5206\u7247<\/td><\/tr><tr><td>UDP \u5355\u5305 &gt; MTU<\/td><td>\u884c\u4e3a\u4e0d\u5b9a<\/td><td>\u660e\u786e\u8fd4\u56de EMSGSIZE<\/td><\/tr><tr><td>\u666e\u901a ff_write \u4e0e ZC \u5171\u5b58<\/td><td>\u9700 opt-out \u9632\u8bef\u89e6\uff0c\u66fe GPF<\/td><td>\u65e0\u9700 opt-out<\/td><\/tr><tr><td>FreeBSD \u5347\u7ea7\u7ef4\u62a4<\/td><td>\u91cd\u5ba1\u8ba1 m_uiotombuf \u7ea6 120 \u884c<\/td><td>\u53ea\u6821\u9a8c sosend \u7b7e\u540d\u662f\u5426\u53d8\u5316<\/td><\/tr><\/tbody><\/table>\n\n\n\n<h3 class=\"wp-block-heading\">4.7 \u6027\u80fd\u8bda\u5b9e\u8fb9\u754c<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>2022 \u5e74\u5b98\u65b9\u6587\u7ae0\uff1a\u53d1\u9001\u96f6\u62f7\u8d1d\u9884\u671f\u63d0\u5347\u7ea6 2-3%\uff0c\u9700\u7ed3\u5408\u573a\u666f\u5b9e\u6d4b<\/li><li>2026-06 ZC-recv \u5355\u6838\u5b9e\u6d4b\uff1a\u5c0f\u5305 echo \u4e09\u6863\u538b\u6d4b\u4e0e\u666e\u901a read \u6301\u5e73\uff08\u566a\u58f0\u5185\uff09\uff0c\u6536\u76ca\u9884\u671f\u5728\u5927\u5757\u6570\u636e\/\u4ee3\u7406\u8f6c\u53d1\u573a\u666f<\/li><li>ZC-send \u539f\u751f\u5316\u6027\u80fd\u76ee\u6807\uff08spec 38\uff09\uff1a\u4e09\u6863 wrk \u4e0b vs baseline \u548c vs \u65e7\u9b54\u6539\u5747 \u0394 \u2264 \u00b13%\uff08\u566a\u58f0\u5185\uff09\u2014\u2014\u539f\u751f\u5316\u662f&#8221;\u7b49\u4ef7\u66ff\u6362&#8221;\u4e0d\u662f&#8221;\u6027\u80fd\u4f18\u5316&#8221;\uff0c\u6536\u76ca\u662f\u67b6\u6784\u503a\u6e05\u96f6<\/li><li>\u5927 payload\uff084KB\/64KB\/1MB\uff09\u4e13\u6d4b\u662f\u540e\u7eed\u5de5\u4f5c\uff08spec \u5df2\u5217 P2-P4 \u573a\u666f\uff0c\u65e7\u65b9\u6848\u5728 P3\/P4 \u6709 crash \u98ce\u9669\uff0c\u65b0\u65b9\u6848\u5fc5\u987b\u6570\u636e\u5b8c\u6574\uff09<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u5982\u4f55\u4f7f\u7528\u3001\u5982\u4f55\u914d\u7f6e\u3001\u4f7f\u7528\u6548\u679c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 \u7f16\u8bd1\u5f00\u5173\uff08\u4e09\u4e2a\uff0c\u5b8c\u5168\u72ec\u7acb\u53ef\u7ec4\u5408\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"># lib\/Makefile<br>#FF_ZC_SEND=1 &nbsp; &nbsp;  # \u53d1\u9001\u96f6\u62f7\u8d1d\uff08\u539f\u751f kern_zc_sendit \u8def\u5f84\uff09<br>#FF_ZC_RECV=1 &nbsp; &nbsp;  # \u63a5\u6536\u96f6\u62f7\u8d1d\uff08kern_zc_recvit \u8def\u5f84\uff09<br>#FF_USE_PAGE_ARRAY=1  # \u534f\u8bae\u6808\u2192DPDK \u96f6\u62f7\u8d1d\uff08\u5b9e\u9a8c\u6027\uff0c\u4e0d\u5efa\u8bae\u751f\u4ea7\u542f\u7528\uff09<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5207\u6362\u5f00\u5173\u540e<strong>\u5fc5\u987b make clean<\/strong>\uff084.3 \u7684\u5751\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 \u53d1\u9001\u96f6\u62f7\u8d1d API \u7528\u6cd5<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">struct ff_zc_mbuf zc_buf;<br>\u200b<br>ff_zc_mbuf_get(&amp;zc_buf, buf_len); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\/\/ \u7533\u8bf7 mbuf \u94fe\u7f13\u5b58\uff08\u542b M_PKTHDR\uff09<br>ff_zc_mbuf_write(&amp;zc_buf, data, len); &nbsp; &nbsp; &nbsp;\/\/ \u76f4\u63a5\u5199\u5165 mbuf \u94fe\uff0c\u53ef\u591a\u6b21\u8c03\u7528<br>ff_zc_send(fd, zc_buf.bsd_mbuf, buf_len); &nbsp;\/\/ \u6295\u9012 mbuf \u94fe\uff0c\u8df3\u8fc7\u62f7\u8d1d<br>\u200b<br>\/\/ send \u6210\u529f\u540e bsd_mbuf \u5df2\u88ab\u534f\u8bae\u6808\u63a5\u7ba1\uff0c\u4e0d\u5f97\u518d\u8bbf\u95ee\uff1b<br>\/\/ \u590d\u7528 zc_buf \u5fc5\u987b\u91cd\u65b0 ff_zc_mbuf_get<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8c03\u7528\u65b9\u4ee3\u7801\u5ba1\u67e5\u8981\u70b9\uff08spec 39 \u8fc1\u79fb\u6307\u5357\uff09\uff1a\u5355\u6b21 send \u6570\u636e\u91cf\u522b\u8d85\u8fc7 SO_SNDBUF\uff08\u5426\u5219 EWOULDBLOCK\uff0c\u9700\u81ea\u5206\u7247\uff09\uff1bUDP \u5355\u5305\u522b\u8d85 MTU\uff08\u5426\u5219 EMSGSIZE\uff09\uff1bsend \u540e\u7acb\u523b\u4e22\u5f03 bsd_mbuf \u6307\u9488\uff08\u5426\u5219 UAF\uff09\uff1bnbytes \u53c2\u6570\u8981 \u2265 \u5b9e\u9645 write \u7d2f\u8ba1\u91cf\uff08\u5b9e\u53d1\u957f\u5ea6 = pkthdr.len\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 \u63a5\u6536\u96f6\u62f7\u8d1d API \u7528\u6cd5<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">struct ff_zc_mbuf zm;<br>ssize_t n = ff_zc_recv(fd, &amp;zm, nbytes);<br>\/\/ \u9010\u6bb5\u8bfb\uff1aff_zc_mbuf_segment(&amp;zm, &amp;seg, &amp;len)<br>ff_zc_recv_free(&amp;zm); &nbsp; \/\/ \u7528\u540e\u5fc5\u91ca\uff0c\u5426\u5219 mbuf \u6cc4\u6f0f<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5.4 \u4f7f\u7528\u6548\u679c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u6d4b\u6570\u636e\uff082026-06-11\uff0c\u5355\u6838 lcore4\uff0cwrk \u4e09\u6863\uff0cA=\u666e\u901a read \/ B=ZC-recv\uff09\uff1a<\/p>\n\n\n\n<table class=\"wp-block-table\"><thead><tr><th>\u6863\u4f4d<\/th><th>A req\/s<\/th><th>B req\/s<\/th><th>\u0394<\/th><\/tr><\/thead><tbody><tr><td>T1 (-t2 -c10)<\/td><td>22,363<\/td><td>22,115<\/td><td>\u22121.1%<\/td><\/tr><tr><td>T2 (-t4 -c100)<\/td><td>~31.1k<\/td><td>~32.1k<\/td><td>\u6301\u5e73\uff08\u566a\u58f0\u5185\uff09<\/td><\/tr><tr><td>T3 (-t8 -c500)<\/td><td>28,615<\/td><td>28,317<\/td><td>\u22121.0%<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c0f\u5305 echo \u4e0b\u96f6\u62f7\u8d1d\u6ca1\u6709\u53ef\u6d4b\u6536\u76ca\u2014\u2014\u8fd9\u662f\u8bbe\u8ba1\u9884\u671f\uff0c\u4e0d\u662f\u5931\u8d25\u3002\u6536\u76ca\u573a\u666f\u662f\u5927 payload \u548c\u8f6c\u53d1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.5 \u5bf9\u4f7f\u7528\u8005\u7684\u5efa\u8bae<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e1a\u52a1\u662f\u5927\u5757\u6570\u636e\/\u8f6c\u53d1\uff1a\u5f00 FF_ZC_SEND + FF_ZC_RECV\uff0c\u7528 ZC API \u6539\u9020\u6536\u53d1\u8def\u5f84<\/li><li>\u4e1a\u52a1\u662f\u5c0f\u5305 RPC\/echo\uff1a\u522b\u6298\u817e\uff0c\u666e\u901a ff_read\/ff_write \u5c31\u597d\uff0c\u5b9e\u6d4b\u8bc1\u660e\u65e0\u5dee\u522b<\/li><li>FF_USE_PAGE_ARRAY\uff1a\u5b98\u65b9\u5b9a\u4f4d\u5b9e\u9a8c\u6027\u3001i40e \u4e22\u5305\u3001Phase-2 \u5b9e\u6d4b\u89e6\u53d1\u8fc7 panic\uff08\u5df2\u4fee\u590d\u4e3a soft drop\uff09<\/li><li>\u5347\u7ea7\u5230\u65b0\u7248\u672c\uff1amake clean \u540e\u91cd\u7f16\u8bd1\uff0cexample\/main_zc.c \u4e0d\u7528\u6539<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6. \u5ef6\u4f38\u9605\u8bfb\uff1a<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u7528\u6237\u6001\u96f6\u62f7\u8d1d\u6808 spec \u603b\u89c8\uff1adocs\/zc_stack_user_spec\/zh_cn\/30-spec-overview.md<\/li><li>\u73b0\u72b6\u6d4b\u7ed8\u4e0e\u62c6\u9664\u6e05\u5355\uff0817 \u5904\u89e6\u70b9\uff09\uff1adocs\/zc_stack_user_spec\/zh_cn\/31-current-state-and-removal.md<\/li><li>\u5bf9\u79f0\u67b6\u6784\u8bbe\u8ba1\uff08kern_zc_sendit \u2194 kern_zc_recvit\uff09\uff1adocs\/zc_stack_user_spec\/zh_cn\/32-native-arch-design.md<\/li><li>\u539f\u751f sosend(top) \u8c03\u7814\uff1adocs\/zc_stack_user_spec\/zh_cn\/22-native-zc-send-research.md<\/li><li>\u5df2\u90e8\u7f72\u9879\u76ee\u8fc1\u79fb\u6307\u5357\uff1adocs\/zc_stack_user_spec\/zh_cn\/39-migration-guide.md<\/li><li>ZC-recv M2 \u5b9e\u6d4b\u62a5\u544a\uff1adocs\/zc_stack_user_spec\/zh_cn\/21-m2-test-report.md<\/li><li>\u521d\u7248\u53d1\u9001\u96f6\u62f7\u8d1d\u4ecb\u7ecd\uff082022\uff09\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s\/j_b7pVOoFa6sqaWQD6eBpw\">https:\/\/mp.weixin.qq.com\/s\/j_b7pVOoFa6sqaWQD6eBpw<\/a><\/li><li>\u76f8\u5173 issue\uff1a#364\uff08PR\uff0c\u534f\u8bae\u6808\u2192DPDK \u96f6\u62f7\u8d1d\uff09\u3001#407\uff08\u63a5\u6536\u4fa7\u96f6\u62f7\u8d1d\u786e\u8ba4\uff09\u3001#712\uff08\u5927\u5305\u53d1\u9001 crash\uff09\u3001#467\uff08\u96f6\u62f7\u8d1d API \u8ba8\u8bba\uff09<\/li><li>\u4e09\u5c42\u67b6\u6784\u6587\u6863\uff1adocs\/zh_cn\/01-LAYER1-ARCHITECTURE.md<\/li><li>\u77e5\u8bc6\u56fe\u8c31\uff1adocs\/zh_cn\/KNOWLEDGE_GRAPH_WIKI.md<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. \u672c\u529f\u80fd\u4e3b\u8981\u4f5c\u7528\u548c\u7279\u70b9 \u672c\u7bc7\u53ea\u8bb2 F-Stack \u7684\u7528\u6237\u6001\u4e0e\u534f\u8bae\u6808\u4e4b\u95f4\u4e00\u76f4\u6709\u7684&#8221;\u6700\u540e\u4e00\u516c\u91cc&#038;# &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/lovelyping.com\/?p=478\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cF-Stack 2.0 \u524d\u77bb8 \uff1a\u7528\u6237\u6001\/\u534f\u8bae\u6808\u95f4\u7684\u96f6\u62f7\u8d1d\uff0c\u4ece\u9b54\u6539\u5230 FreeBSD \u539f\u751f sosend \u5bf9\u79f0\u67b6\u6784\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,47],"tags":[56,21,59],"class_list":["post-478","post","type-post","status-publish","format-standard","hentry","category-f-stack","category-f-stack-2-0","tag-dpdk","tag-f-stack","tag-59"],"_links":{"self":[{"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/posts\/478","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lovelyping.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=478"}],"version-history":[{"count":1,"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/posts\/478\/revisions"}],"predecessor-version":[{"id":481,"href":"https:\/\/lovelyping.com\/index.php?rest_route=\/wp\/v2\/posts\/478\/revisions\/481"}],"wp:attachment":[{"href":"https:\/\/lovelyping.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lovelyping.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lovelyping.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}