From nobody Sat May 27 08:33:06 2023 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4QSw6B53VDz4Wk5t; Sat, 27 May 2023 08:33:06 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4QSw6B4WFLz3LWp; Sat, 27 May 2023 08:33:06 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1685176386; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=MSi4jTgJvjc65/43w6UDvskFLmQuk5pqt6TNBzMkuVw=; b=yQddnJnL6Q4O+2h8ANjK6eC9hJrPfdxnOvq9lh+eeK+k8K4ggNFZUYMdtpfsq/7bkOMTMQ hfRY4OeIk56YO9/xWn4j2GTuv0gDnLRCGo9cxRetyXvQWLUuyh4RlPMnvV0p3NDMnx9AEM blCmXe8XjIdwtOhEjVdwTgvGPtPzatEKwCd5b4AGjIxyNZbtCojDrbI+z4tqr0FSzwapVZ 9gEZHluvqIAxJueWkECUHjCQWjMQ6lAiIbZlYPvsnp5xMTnpkwvkovkkacMdJdbEZspSa6 fqefsQ5MtizTCHMRAw0PWGIqKZge1gza8m7fZi3w0uJSeHzN/F9GfWTydu38zA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1685176386; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=MSi4jTgJvjc65/43w6UDvskFLmQuk5pqt6TNBzMkuVw=; b=CJ/Pr+S+q2fXX9LzPW4CiEq/Bhp0tQ6NTMjm6308F29J1uC/cOvUjy7tFn6BtFDAMI6kiy u/vUcaJ4WmbQaiTWgmHYAPjoVLmac10K5WxNqJdLl9XdJYGY+f2iGAfkfwJO30iNmuW1Fi k5037PJytO53EX5ctNBOHYSkhFEoxb0YqpiBgaZO4ow8hZ4eIyj4EJzU7ID/RPJ6/fHlBj UVl7KNoOtlHs1Aw2yZ+yoIJtPzsPCMjPiLMAzXQyV4msrhfToqwEYM7H++cInomMI6C1BK 1bbffgrDPuHA+1TcMBP7b9cAY+tqJqMawUUMaHE1k3SDxs7XDOIkyDmBmAVs0Q== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1685176386; a=rsa-sha256; cv=none; b=aJxPQ4D/c1+n+9zHl1fPYSykw3oWr26FL92+IXtEJPWwFN8g965mAUUF7Cw1qqEaFoVj3z yhkCQEunX1/0fQ02Xn1H9Z9kVKVyqTFVkA1tVatWYW8KGdzJizcNtzCFJdceu9TckeRUa9 B5GHBsFyCbjnaqTo3fHjovp4hAJMPPtVRpqkyBrsDkACnpdUs6DyLklhXdfCt7+8KkiUSi E3NWvlLIwIIdVlrxoYNAhQLlrhcIG51lx4cCZLwQpx4GrWNuSZ27fNhlzddWB9X2lZHcmJ 3uKmgP8w4HwpaEEXp+ofBEYYKU7QfsFnEzwusQA/pd19jXfIBHO6OPRuQkBN4g== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4QSw6B3b2Yzhwv; Sat, 27 May 2023 08:33:06 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 34R8X6Ol041476; Sat, 27 May 2023 08:33:06 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 34R8X6ha041475; Sat, 27 May 2023 08:33:06 GMT (envelope-from git) Date: Sat, 27 May 2023 08:33:06 GMT Message-Id: <202305270833.34R8X6ha041475@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Marko Zec Subject: git: fb31ad53c471 - stable/13 - route.8: mention DXR in FIB_ALGO section List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-branches@freebsd.org X-BeenThere: dev-commits-src-branches@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: zec X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: fb31ad53c471e01ba473b2fb038c0cff6253654b Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch stable/13 has been updated by zec: URL: https://cgit.FreeBSD.org/src/commit/?id=fb31ad53c471e01ba473b2fb038c0cff6253654b commit fb31ad53c471e01ba473b2fb038c0cff6253654b Author: Marko Zec AuthorDate: 2023-05-27 08:31:42 +0000 Commit: Marko Zec CommitDate: 2023-05-27 08:31:42 +0000 route.8: mention DXR in FIB_ALGO section While here, add a sentence describing DPDK DIR24-8 principle of operation. MFC after: 7 days --- sbin/route/route.8 | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/sbin/route/route.8 b/sbin/route/route.8 index afcf55ab44c7..25aaf8087343 100644 --- a/sbin/route/route.8 +++ b/sbin/route/route.8 @@ -28,7 +28,7 @@ .\" @(#)route.8 8.3 (Berkeley) 3/19/94 .\" $FreeBSD$ .\" -.Dd March 14, 2023 +.Dd May 27, 2023 .Dt ROUTE 8 .Os .Sh NAME @@ -439,7 +439,9 @@ Lockless immutable radix, re-created on every rtable change, tailored for a small FIB with <1000 routes. .It dpdk_lpm DPDK DIR24-8-based lookups, lockless datastructure, optimized -for a large FIB. +for large FIBs. +DIR24-8 relies on a large flat lookup table (64 MB with IPv4) which is +directly indexed by the more significant portion of the lookup key. In order to use the dpdk_lpm algorithm one or both of the following kernel modules must be loaded via .Xr loader.conf 5 : @@ -449,6 +451,16 @@ DPDK implementation for IPv4. .It dpdk_lpm6.ko DPDK implementation for IPv6. .El +.It dxr +IPv4 only, lockless, compressed lookup structure +(below 2.5 Bytes per IPv4 prefix for large BGP FIBs) +which easily fits into modern CPU cache hierarchies, +lookup throughput scales linearly with CPU cores. +Loadable as a kernel module at runtime or via +.Xr loader.conf 5 : +.Bl -tag -width fib_dxr.ko -compact +.It fib_dxr.ko +.El .El .Pp The algorithms are selected automatically based on the size of the routing