From nobody Fri Sep 27 10:36:38 2024 X-Original-To: net@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 4XFRj35vkNz5XqTQ for ; Fri, 27 Sep 2024 10:36:39 +0000 (UTC) (envelope-from bugzilla-noreply@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 "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XFRj34rhqz4ZPd for ; Fri, 27 Sep 2024 10:36:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1727433399; 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: in-reply-to:in-reply-to:references:references; bh=abkqMV3vQhTobFwsQcErQYAxkJeOfBPzqTMvfP5717c=; b=hFzNf4DTcwmEDdutwQQOD0mOkYCJszEvnFGH+pahtuUEj/TNVyiaZax941Nf2l1gkP7ABV aIdCcP5n5fIJpYRCUhwmNt2+3ThRtcC++8h2llGFy0wkGAS8S4XE/y7pKqjuZ00uPXZ+qQ hXcJXlj1ZJV0sqNvl+m9GfRl3QFSrtDE6spWRbkc6Vjwt43PdTJYTeOHKFsCbVekDNThPA 1Qz5+GtkBiG3e8f0rkb+j98+eZ5TdveAu2ly4tIpo4+0GxPHPdi+l5ND8BfX7S7TaXBpwb H4NVzL4o2e3yNm8YafMy579qI7a8l01Hic7ztUvqWA6VWCx6POFPqlh9k72tBw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1727433399; a=rsa-sha256; cv=none; b=nGyCD6qWYGkvzcpasj8mneYN+1lo95Nm6CUYl6fPqSBmq5QUwW8UbFuCORfXE8KyjAM3eR 9D71W73Jj96HUKgjhmPi9wqJIKos+bgNhzOcEg1YqGUIQoVO4FIrIqjqDCSblroRzvOeJE NMt7/w9o+gzRPAkUM/+ooJuvAN4lBtdJrTPFUFLOB0vXu+Ffn1zJNW2Qba2CSicmYRo04H gRrMQwTifsP7xLuepXYXyjubrfuEyZsDGUavaKU5PSb72rclY8NyQOeUy+tj7dNp8+8IkD hAmr26q9wq1mVLt5dcelXGyifW//g9azOqu5QoLUnX01cdQI8oQh+EIyK3IKKw== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 4XFRj34TH9zcnQ for ; Fri, 27 Sep 2024 10:36:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 48RAad0i062549 for ; Fri, 27 Sep 2024 10:36:39 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 48RAadQe062548 for net@FreeBSD.org; Fri, 27 Sep 2024 10:36:39 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 281560] gve (4) uma deadlock during high tcp throughput Date: Fri, 27 Sep 2024 10:36:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.1-RELEASE X-Bugzilla-Keywords: vendor X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: markj@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281560 --- Comment #16 from Mark Johnston --- This smells a bit like a thread disabled interrupts and then went off-CPU somehow. The iperf thread is stuck in the runqueue of a CPU and nothing ge= ts scheduled there, so it doesn't run. If this is not enough of a hint, we could try enabling scheduler tracing: - add the following to your kernel config: options KTR options KTR_COMPILE=3D(KTR_SCHED) options KTR_ENTRIES=3D(256*1024) - before starting your test, enable KTR tracing: # sysctl debug.ktr.enable=3D0x20000000 - once the hang occurs, use ktrdump (or "show ktr" in DDB) to dump scheduler traces --=20 You are receiving this mail because: You are the assignee for the bug.=