From owner-freebsd-net@FreeBSD.ORG Tue Apr 28 09:18:12 2015 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 453AE79E for ; Tue, 28 Apr 2015 09:18:12 +0000 (UTC) Received: from kerio.tuxis.nl (alcyone.saas.tuxis.net [31.3.111.19]) (using TLSv1.1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B899F1F0B for ; Tue, 28 Apr 2015 09:18:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=tuxis.nl; s=mail; h=from:subject:date:message-id:to:mime-version:content-type; bh=x6+ydwUD6uXZn+DyVH3PMNjuNCvVg4NSjahWV3SNjuc=; b=EjIkDSDQnAPSNhjsEPwqeRs7hw9nQdxgceTCb6HtZsZdQlF2stnR/r6g6LQpioSbxVYPonro6BRUt D/wyQGTxZWDmFpLtl7LN5/UHWE+klmk6wEcACKQ15XqS9vr5d+GYuzKsSYB+nsykRib1nXSmXVKm7i 730aN59BlXAAmnHs2IBrPgD95vLWULr/6sgW218fAvpbFLDxbwxOE/R3Gx7Q6es3Beg6chA4uwfK58 ubQdJcZatffZq+hcwTqKfy9YuPkFKFco2bWHTeTbSE0Z52C1HnyKRt0D8Kod45XdGJJQCCiwpYKuVY 9A2EPN40NIt1D7jJmU+qdokau0MqgTg== X-Footer: dHV4aXMubmw= Received: from [31.3.104.222] ([31.3.104.222]) by kerio.tuxis.nl (Kerio Connect 8.5.0 beta 2) for freebsd-net@FreeBSD.org; Tue, 28 Apr 2015 10:47:56 +0200 Date: Tue, 28 Apr 2015 10:47:56 +0200 Subject: Frequent hickups on the networking layer X-Mailer: Kerio Connect 8.5.0 beta 2/Kerio Connect Client X-User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36 Message-ID: <4281350517-9417@kerio.tuxis.nl> X-Priority: 3 Importance: Normal MIME-Version: 1.0 MIME-Version: 1.0 MIME-Version: 1.0 MIME-Version: 1.0 MIME-Version: 1.0 MIME-Version: 1.0 From: Mark Schouten To: freebsd-net@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha1"; boundary="=-bsmaSdRL1xgBlm7R8HAU" X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Apr 2015 09:18:12 -0000 --=-bsmaSdRL1xgBlm7R8HAU Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi, I've got a FreeBSD 10.1-RELEASE box running with iscsi on top of ZFS. I've = had some major issues with it where it would stop processing traffic for a = minute or two, but that's 'fixed' by disabling TSO. I do have frequent iscs= i errors, which are luckily fixed on the iscsi layer, but they do cause an = occasional errormessage on both the iscsi client and server. Also, I see in= put errors on the FreeBSD server, but I'm unable to find out what those are= . I do see a relation between iscsi-errormessages and the number of etherne= t inputerrors on the server. I saw this message [1] which made me have a look at `vmstat -z`, and that s= hows me the following: vmstat -z | head -n 1; vmstat -z | sort -k 6 -t , | tail -10 ITEM = SIZE LIMIT USED FREE REQ FAIL SLEEP zio_data_buf_942= 08: 94208, 0, 162, 5, 135632, 0, 0 zio_data_buf_98304= : 98304, 0, 118, 9, 101606, 0, 0 zio_link_cache: = 48, 0, 6, 30870,24853549414, 0, 0 8 Bucket: = 64, 0, 145, 2831,148672720, 11, 0 32 Bucket: = 256, 0, 859, 731,231513474, 52, 0 mbuf_jumbo_9k: = 9216, 604528, 7230, 2002,11764806459,108298123, 0 64 Bucket: = 512, 0, 808, 352,147120342,16375582, 0 256 Bucket: = 2048, 0, 500, 50,307051808,189685088, 0 vmem bta= g: 56, 0, 1671605, 1291509,198933250,36431, 0 128 Buck= et: 1024, 0, 410, 106,65267164,772374, 0=20 I am using jumboframes. Could it be that the inputerrors AND my frequent hi= ckups come from all those failures to allocate 9k jumbo mbufs? And can I in= crease the in [1] mentioned sysctls at will? Thanks [1]: https://lists.freebsd.org/pipermail/freebsd-questions/2013-August/2528= 27.html Met vriendelijke groeten, --=C2=A0 Kerio Operator in de Cloud? https://www.kerioindecloud.nl/ Mark Schouten | Tuxis Internet Engineering KvK:=C2=A061527076=C2=A0| http://www.tuxis.nl/ T: 0318 200208 | info@tuxis.nl= --=-bsmaSdRL1xgBlm7R8HAU Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Description: Electronic Signature S/MIME Content-Transfer-Encoding: base64 MIIRwQYJKoZIhvcNAQcCoIIRsjCCEa4CAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCCDt4w ggUbMIIEA6ADAgECAhAsv+VdGX6YsSHI/WRu2j2JMA0GCSqGSIb3DQEBBQUAMIGTMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNh dGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMB4XDTE0MDcwMTAwMDAwMFoXDTE1MDcwMTIzNTk1OVow HjEcMBoGCSqGSIb3DQEJARYNbWFya0B0dXhpcy5ubDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC 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