From nobody Thu Dec 11 20:43:35 2025 X-Original-To: dev-commits-src-all@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 4dS4LJ1tZhz6KLN9 for ; Thu, 11 Dec 2025 20:43:36 +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 "R12" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4dS4LH5Mgjz3Zr1 for ; Thu, 11 Dec 2025 20:43:35 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1765485815; 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=BKp23ytcUH2YM4K34jMDHhfqDfP3eVHp38GcmQcch9Y=; b=iQwKLn0sumT//3tsrTNTEy3g971uQSVW+Y2W+MOu+5Bt2XoatrOQ52S/oa+1rN8LlvZ+cI iPhbJekkvlfgWq/lsn/JN4TFlNh+qBnbJMS9nEl2Tc24rQq9SbVaiENuM9jsPO12kw3gjs iETYiLzxomfjgiRqZ3o23ce6e7YQm6XyZj9PP0iB8GL5xcrNn9yi1GfhyTcIG4CNfRO1TL HVkHQaIeONsq/pmL+hTgFWcGdDwZYtvBvGuWLh5fhdBJS9Fy5MxOlQtQNxUcqb9KypsI7G ovwS5F9o6TZfwz+NJ8Z2lAq6Q77x5tjd+ZkFb6GIgMLo2kJ7/Y1pF7vGWRDuww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1765485815; 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=BKp23ytcUH2YM4K34jMDHhfqDfP3eVHp38GcmQcch9Y=; b=MuoNSxA5TcKxGFKTnhDw7S1mZSAkBziy82sT4L1DO+ELIyetJ6G1fQr0DWm54+kfM3Z/8z UbchYKNZvJAkFf3q50u5Uob4BPBsVf4hApntT7Mbq2Yra2M270/bYkFTf8QJvvctzf6jI6 2uiJ0cmpxITJdz5MuF59FwqkLWkV6TiqWnuP10lDKZbzBeG7oRtWNek7N8xH38XrXc9LrG 7Hmgfbvmo/A7tZB6EmJcwJ4XcNKZLQoGSztgGFYOPO7NzUDlhs8r/t5NcmKE5/mVZFWJaD OAgeZbsyx0Oq1oKOFwO8U/Rjn43zbe6tkNccevaNkL0KjCgkyKw7xv1IemPCoA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1765485815; a=rsa-sha256; cv=none; b=rjfYbiQ0bib9RpF3sZXX/w0b15dM4j9cwJnKnKgGt8DZ6Jba8l5BKnHk/XMcTslk1gbfo5 tNUiLYaKussrL2p/cXu6BGLOTYFxkQ00VOM4DD8E0B7f7rfQ962AtF1emS8BlwMLg0ufgF 4EZ3FHe88Eihml+5ejJNr94tP3jSBOQjgxQjgYBGdb150WQtKRJ3179ynL6DJcTkYialGl 0kBkc6WihRBdLv1K0Gg5D5WjQDHzx8Ar5nM7ytO/OTKm2t351vJHx5UN2W6oQMt+OvMVQx hUOgcmYo2kweuycZdbD+kRV2ahdwOypd1Yvu4hLlNoa7U7DYKnTw18G/VmMc7A== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4dS4LH4pZDzmjP for ; Thu, 11 Dec 2025 20:43:35 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 318ed by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Thu, 11 Dec 2025 20:43:35 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Kevin Bowling Subject: git: 714051f3f804 - stable/15 - e1000: Bump 82574/82583 PBA to 32K List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kbowling X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 714051f3f804f094a6d68ebd2044beadd8ba6b96 Auto-Submitted: auto-generated Date: Thu, 11 Dec 2025 20:43:35 +0000 Message-Id: <693b2cf7.318ed.2ab06dd2@gitrepo.freebsd.org> The branch stable/15 has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=714051f3f804f094a6d68ebd2044beadd8ba6b96 commit 714051f3f804f094a6d68ebd2044beadd8ba6b96 Author: Kevin Bowling AuthorDate: 2025-11-21 05:02:00 +0000 Commit: Kevin Bowling CommitDate: 2025-12-11 20:43:12 +0000 e1000: Bump 82574/82583 PBA to 32K The reporter contacted me with packet loss and throughput fluctuations on a low power machine (Intel J1900) that got worse with the recent AIM algorithm in FreeBSD 14.2+. 32K RX PBA matches Linux default. Add a conditional path since we don't otherwise do a fixup for jumbo frames to retain space for two frames in Tx. With this change and an additional errata change, the throughput meets line rate for the reporter. Reported by: Codin Tested by: Codin (cherry picked from commit aa30bab9a92e1be230b9708bff9f33aae7d384e5) --- sys/dev/e1000/if_em.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c index 465e019029d9..444b16912fee 100644 --- a/sys/dev/e1000/if_em.c +++ b/sys/dev/e1000/if_em.c @@ -3080,9 +3080,13 @@ em_reset(if_ctx_t ctx) case e1000_82573: pba = E1000_PBA_12K; /* 12K for Rx, 20K for Tx */ break; + /* 82574/82583: Total Packet Buffer is 40K */ case e1000_82574: case e1000_82583: - pba = E1000_PBA_20K; /* 20K for Rx, 20K for Tx */ + if (hw->mac.max_frame_size > 8192) + pba = E1000_PBA_22K; /* 22K for Rx, 18K for Tx */ + else + pba = E1000_PBA_32K; /* 32K for RX, 8K for Tx */ break; case e1000_ich8lan: pba = E1000_PBA_8K;