From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39EE5C433E0 for ; Fri, 7 Aug 2020 15:36:46 +0000 (UTC) Received: from dpdk.org (dpdk.org [92.243.14.124]) by mail.kernel.org (Postfix) with ESMTP id E736C20866 for ; Fri, 7 Aug 2020 15:36:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E736C20866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=dpdk.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dev-bounces@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id AADD22BF2; Fri, 7 Aug 2020 17:36:44 +0200 (CEST) Received: from inbox.dpdk.org (xvm-172-178.dc0.ghst.net [95.142.172.178]) by dpdk.org (Postfix) with ESMTP id D5A3A2BF1 for ; Fri, 7 Aug 2020 17:36:42 +0200 (CEST) Received: by inbox.dpdk.org (Postfix, from userid 33) id 9A254A04B1; Fri, 7 Aug 2020 17:36:42 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Date: Fri, 07 Aug 2020 15:36:42 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: ethdev X-Bugzilla-Version: 18.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: iryzhov@nfware.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 Subject: [dpdk-dev] [Bug 521] i40e: incorrect byte counters X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" https://bugs.dpdk.org/show_bug.cgi?id=3D521 Bug ID: 521 Summary: i40e: incorrect byte counters Product: DPDK Version: 18.11 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: Normal Component: ethdev Assignee: dev@dpdk.org Reporter: iryzhov@nfware.com Target Milestone: --- After running under 10G traffic over 3 days, the X710 card starts showing incorrect RX/TX bytes statistics. The problem seems to happen because of the following code in i40e_update_vsi_stats: /* exclude CRC bytes */ nes->rx_bytes -=3D (nes->rx_unicast + nes->rx_multicast + nes->rx_broadcast) * ETHER_CRC_LEN; The rx_bytes counter in X710 cards is 48-bit long, so it takes around 3 day= s to overflow. When it overflows, it becomes less than (rx_pkts * ETHER_CRC_LEN), and the substruction makes it a negative number, or, to be more precise, a = very big positive number, as it's uint64_t. For XL710 40G cards, it will take less than one day to face the issue. --=20 You are receiving this mail because: You are the assignee for the bug.=