From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 50BD34653A for ; Wed, 9 Apr 2025 05:53:48 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id D6DCE402D1; Wed, 9 Apr 2025 05:53:47 +0200 (CEST) Received: from mail-pf1-f181.google.com (mail-pf1-f181.google.com [209.85.210.181]) by mails.dpdk.org (Postfix) with ESMTP id A087540265 for ; Wed, 9 Apr 2025 05:53:45 +0200 (CEST) Received: by mail-pf1-f181.google.com with SMTP id d2e1a72fcca58-736c1138ae5so6231256b3a.3 for ; Tue, 08 Apr 2025 20:53:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1744170824; x=1744775624; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=jfjght0PWoFzIpZ5QX3J6yIbAaZI2bdjHU08kqucwZY=; b=DTbEGyN97pwc2zu8qRlvdgnIO7BiOhHuxpiOSonbfXQAlP/QDCatQGjNoPxwObn4cM Ck7A5zqDExXGtpqZ6PVs7sOmjF/wSbtIMfaacYXGQuRjhNd4DmhnUp8c3CtSsdG3TYzT DrYx97FPzwBj/L1RknbhGCS7+/YcqIR6bMmzX8EdX/dBUsce4LlIEyrsgJwdoOcV5wtx Y/wTDKKuCPHvgXHSpT/p2UkDGRWFG9E62DPUVvVC9GOXN5YE2+/nnysg/8GtwYrM3AxT 371oXiPN3ub54LYxd0YlqQ+ffs+7GHZ2JuwvHDQ71LI5XnkO5TgZpK4PeZjl+muaDWR/ nDuQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744170824; x=1744775624; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jfjght0PWoFzIpZ5QX3J6yIbAaZI2bdjHU08kqucwZY=; b=qmA/pfqBSIcxIpSJYhaupnA5SE2HeuCU65WTvTk+jk1I95VwoKDXQsNw6dGsQvmsEA r7SXhIxwT2dPbDpP0IdVIqa5eovfROweiIgT9zaDrq9g/AZQKpmg/mIchMH2N9jIQutu sr6mOss4gv4ZKRxk+b4CNdUv6tO6DwJ0NMH/l8+E56FrXOX3PkuY0aWLakjlg+q/5f3Z PqnpdTerxn6wutmyh0sY+CytFxfC9EIVLrpMovsr/2QbSZwExVUPudxtJ2KMEERsMD4w RbYjuOs1PIF/fFaLtaIrOjqW9je9MM4rfTgQnzgFntpoiKoMpSF9vaT+IPCmc4bEKqIJ 9Z2A== X-Forwarded-Encrypted: i=1; AJvYcCWx476wSiQuuo6RfccJMuqfWolWByB2c+377y6f9H4LkyVeVtQob6G2M2k6mtIu/5N9CRsVBQ==@dpdk.org X-Gm-Message-State: AOJu0YxCIPTvVRS6vrENFJrnIFA7xPLSsr7BCHfqh4Ud8vJ3kTeKoNNI 8oCrm3JK3fwmbvnsrl8QnSTmCRT/P7cZm9nNSvyLZwqu6QJXpUDG9VIBEFH8dHc= X-Gm-Gg: ASbGnctYTgQBGt5RW3lMOywApK0XDWZfFD90LEmiSPYu+S4c4frCAnElhpW3Pu7KJx7 YnKhxggFzZdOy2X1CGRBM9YXBdxkieg51/1n7YFijmQtPXbdW65jfArKUOssx4k+EIM4Chsv21u KpxPl+8BCtg+rJvACjNuj8q2hno5OzpWkhFzCwBSiJV5VpFC2UyI4F47IrGR1wRpaZtt5+8kJDp nkk7WQ67B2vptrMLKWcO4riPxKzCuqMelno7ycPxUkQKzCfQPCGSM2EEQsNHUx2lO+hY3hjoEJy 2ufPLraDrQzzDYlp/SMyd0LEeButDtgKJAWjNRe77u1KzleUfDl559d+bduQCoHLkTificXrG/b JCfCoTZ0KTapDOZNgB8IXKefHT43K8h8= X-Google-Smtp-Source: AGHT+IFCmlN6UBeqOrIlzQ6ikpCBPumfZX9Em0ipgHEhxSgB17oq7Z5X8l7l3dYpA29We4PFAzChew== X-Received: by 2002:a05:6a00:39a9:b0:737:e73:f64b with SMTP id d2e1a72fcca58-73bafbb99famr1072125b3a.1.1744170824289; Tue, 08 Apr 2025 20:53:44 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73bb1e53e92sm197747b3a.156.2025.04.08.20.53.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Apr 2025 20:53:44 -0700 (PDT) Date: Tue, 8 Apr 2025 20:53:41 -0700 From: Stephen Hemminger To: "Lombardo, Ed" Cc: Dmitry Kozlyuk , "users@dpdk.org" Subject: Re: mbuf refcnt issue Message-ID: <20250408205341.68d37d0a@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Tue, 8 Apr 2025 22:33:56 +0000 "Lombardo, Ed" wrote: > Hi Dmitry, > I added mbuf refcnt check at the point where we get the packets from DPDK rte_eth_rx_burst() and I am finding many mbufs refcnt set to 2 when I expect them to be 1. This is more evidence that something has gone wrong within DPDK and the mempool management, perhaps, and I don't know how my setup went into this state. I changed the traffic type from Telnet to Enterprise traffic and rte_eth_tx_burst() no longer accepts mbufs. Not likely a DPDK bug. More likely you are having application problems. Have you tried enabling things like RTE_LIBRTE_MBUF_DEBUG and RTE_LIBRTE_MEMPOOL_DEBUG and RTE_ENABLE_ASSERT? Also using a current version of DPDK, address sanitizer, and latest GCC or CLANG can uncover issues with use after free.