From nobody Sat Apr 23 04:11:27 2022 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 6FEF11A81940 for ; Sat, 23 Apr 2022 04:11:28 +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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4KldBS21VSz4g53 for ; Sat, 23 Apr 2022 04:11:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) 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 263752B97 for ; Sat, 23 Apr 2022 04:11:28 +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 23N4BS21051043 for ; Sat, 23 Apr 2022 04:11:28 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 23N4BSD2051042 for net@FreeBSD.org; Sat, 23 Apr 2022 04:11:28 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 251052] [sctp] Throughput becomes extremely low under load Date: Sat, 23 Apr 2022 04:11:27 +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: 11.4-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: bc979@lafn.org X-Bugzilla-Status: In Progress 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 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1650687088; 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=qy9VdJ5pMl2gPDznFlEYIu50GNINXaxvHL5jF03KOdk=; b=bSqY2R4dRp8KrLJt4d8yPOLEAuEO2nMW1EZImbWIdtS6/ixqPDaXjGrp+lk6F4zq78cNt/ GbBLYzZVDS0b6Lfwp+ny8BNDlZHiEk2rg5k21wpfXuk0MpkQ2xR7HP3WAHnFvH3CuzxSRb g8ZmR36xbx4c7+9qKBMXyISqnpyXBGRKJuB1/40kr4NdSzttjkYist3jdMHtIdLf5tnIlK v/mV+QIiZ/Wkt7U294zKrpoahT4ZYPu+UTtUq+bgusLzScNTDpTGNLzkvflUUx9rS1FUW0 6p8PUgoH+KVJavtun8jjh9QPUqm5XUR/nJoRjTrI/eW/vyWEcPt2jeTOFsRH6g== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1650687088; a=rsa-sha256; cv=none; b=GQA5DoIVqgtqQtkH/by2EyQ0Wo/zeQAN7VhXRyjZqyXiK2k5AR1+iTMEJj/EozvJ8hHMkI iruA9cGGQpQi13EJRCiCzctDKrpoRcRcRRhFnI/VerWwZ5zaZJIY8TBpQqx3m16J3gafEp xj1XUKQSiS7BKEtoJdH8kMOHF70BfgW7pXdftng7kPcJfq6ufFz9vCSuBtBzCumhZCxZci GRTkmnsx7MBGSPxNInmyNxQFZRsOBU3ABiLGqUcEryVbSAir8OPFV43iAncaUbUdfzoQR9 /yVNjmsciZwABp41N5b28xGxbA5Woojak2yWkadAZ88Hir8+xdp7t+bRHhsysw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D251052 --- Comment #11 from bc979@lafn.org --- (In reply to Bryan Drewery from comment #9) It appears that iperf3 does not use multiple streams regardless of the sett= ings for the arguments. With nstreams set to > 1, tcpdump shows that the SCTP f= ield SID is always 0. Looking through the code, the actual write statement used does not support including a stream pointer. I suspect that was overlooked= in the last update. The code does call a sctp_write like function, but it is = just set to their standard write module. Iperf3 will not test this problem alth= ough it does sort of indicate a problem since the throughput basically goes to z= ero. This just might be a problem in iperf3 rather than in SCTP. --=20 You are receiving this mail because: You are the assignee for the bug.=