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Fri, 06 Sep 2024 05:15:08 -0400 X-MC-Unique: oxHA6XNLNvCg7D2jy2hH6Q-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9DE031955F45; Fri, 6 Sep 2024 09:15:07 +0000 (UTC) Received: from [10.39.208.34] (unknown [10.39.208.34]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 2ED5B19560AA; Fri, 6 Sep 2024 09:15:05 +0000 (UTC) Message-ID: <3a27819f-eaee-4f9f-8e33-7a625e63ea29@redhat.com> Date: Fri, 6 Sep 2024 11:15:03 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: 32-bit virtio failing on DPDK v23.11.1 (and tags) To: "Chris Brezovec (cbrezove)" , "dev@dpdk.org" Cc: "Roger Melton (rmelton)" , "Walt Robinson (walrobin)" References: From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Hello Chris, On 9/3/24 16:43, Chris Brezovec (cbrezove) wrote: > Hi Maxime / others, > > I am just following up to see if you have had any chance to look at what > I previously sent and had any ideas regarding the issue. It seems there are not a lot of people testing 32-bits builds with Virtio if it is borken since v23.03. As it looks important to you, could you please work in setting up a CI? For the issue itself, nothing catch my eye for now. I will continue to have a look. Regards, Maxime > Thanks in advance! > > -ChrisB > > *From: *Chris Brezovec (cbrezove) > *Date: *Wednesday, August 28, 2024 at 5:27 PM > *To: *dev@dpdk.org , maxime.coquelin@redhat.com > > *Cc: *common-dpio-core-team(mailer list) > *Subject: *32-bit virtio failing on DPDK v23.11.1 (and tags) > > HI Maxime, > > My name is Chris Brezovec, we met and talked about some 32 bit virtio > issues we were seeing at Cisco during the DPDK summit last year.  There > was also a back and forth between you and Dave Johnson at Cisco last > September regarding the same issue.  I have attached some of the email > chain from that conversation that resulted in this commit being made to > dpdk v23.11 > (https://github.com/DPDK/dpdk/commit/8c41645be010ec7fa0df4f6c3790b167945154b4 ). > > We recently picked up the v23.11.1 DPDK release and saw that 32 bit > virtio is not working again, but 64-bit virtio is working.  We are > noticing CVQ timeouts - PMD receives no response from host and this > leads to failure of the port to start.  We were able to recreate this > issue using testpmd.  We have done some tracing through the virtio > changes made during the development of the v23.xx DPDK release, and > believe we have identified the following rework commit to have caused a > failure > (https://github.com/DPDK/dpdk/commit/a632f0f64ffba3553a18bdb51a670c1b603c0ce6 ). > > We have also tested v23.07, v23.11, v23.11.2-rc2, v24.07 and they all > seem to see the same issue when running in 32-bit mode using testpmd. > > We were hoping you might be able to take a quick look at the two commits > and see if there might be something obvious missing in the refactor work > that might have caused this issue.  I am thinking there might a location > or two in the code that should be using the VIRTIO_MBUF_ADDR() or > similar macro that might have been missed. > > Regards, > > ChrisB > > This is some of the testpmd output seen on v23.11.2-rc2: > > LD_LIBRARY_PATH=/home/rmelton/scratch/dpdk-v23.11.2-rc2.git/build/lib > /home/rmelton/scratch/dpdk-v23.11.2-rc2.git/build/app/dpdk-testpmd -l > 2-3 -a 0000:07:00.0 --log-level pmd.net.iavf.*,8 --log-level lib.eal.*,8 > --log-level=lib.eal:info --log-level=lib.eal:debug > --log-level=lib.ethdev:info --log-level=lib.ethdev:debug > --log-level=lib.virtio:warning --log-level=lib.virtio:info > --log-level=lib.virtio:debug --log-level=pmd.*:debug --iova-mode=pa -- -i > > — snip — > > virtio_send_command(): vq->vq_desc_head_idx = 0, status = 255, > vq->hw->cvq = 0x76d9acc0 vq = 0x76d9ac80 > > virtio_send_command_split(): vq->vq_queue_index = 2 > > virtio_send_command_split(): vq->vq_free_cnt=64 > > vq->vq_desc_head_idx=0 > > virtio_dev_promiscuous_disable(): Failed to disable promisc > > Failed to disable promiscuous mode for device (port 0): Resource > temporarily unavailable > > Error during restoring configuration for device (port 0): Resource > temporarily unavailable > > virtio_dev_stop(): stop > > Fail to start port 0: Resource temporarily unavailable > > Done > > virtio_send_command(): vq->vq_desc_head_idx = 0, status = 255, > vq->hw->cvq = 0x76d9acc0 vq = 0x76d9ac80 > > virtio_send_command_split(): vq->vq_queue_index = 2 > > virtio_send_command_split(): vq->vq_free_cnt=64 > > vq->vq_desc_head_idx=0 > > virtio_dev_promiscuous_enable(): Failed to enable promisc > > Error during enabling promiscuous mode for port 0: Resource temporarily > unavailable - ignore >