From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <clearasu@gmail.com>
Received: from mail-lf0-f45.google.com (mail-lf0-f45.google.com
 [209.85.215.45]) by dpdk.org (Postfix) with ESMTP id 6AB422BF0
 for <dev@dpdk.org>; Mon, 22 Feb 2016 20:15:57 +0100 (CET)
Received: by mail-lf0-f45.google.com with SMTP id l143so100636783lfe.2
 for <dev@dpdk.org>; Mon, 22 Feb 2016 11:15:57 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:date:message-id:subject:from:to:content-type;
 bh=WjjfDY2onl6UG3fpZpbc79BlCqdT2Yga/oNdTwXmqs8=;
 b=sxd7QAk5qSHMa2+BsLjPjoyCwXXKzARikRcJNs2g8cUKogGp856+gWNVHyXvldVx6b
 NdN8XdZpXHJITOP/8Aq271WEKk0rycH9+a4t+AdpcfIZVgsC+Pl6wghAULaCzIjJTlSh
 XgGdn5nTA4uw/NI65nglHu3PCjQGsSKUpBbTHMCrNNY2Lcy6yj/7Zv4s8JfYTVpAjrAG
 pKmTEUBRHTBsxgsqumru79rP2CyXCYkClsGNgHyw561VdwVP3PZdjN1gwKS1mE2WoByO
 JTDi5a0Ux4FUd31PT5aYCVbTZHMCpTIIf4hTGRDsGKxAlp3/h76iSE599BN58EHd1aye
 2ddg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20130820;
 h=x-gm-message-state:mime-version:date:message-id:subject:from:to
 :content-type;
 bh=WjjfDY2onl6UG3fpZpbc79BlCqdT2Yga/oNdTwXmqs8=;
 b=LMl1gmmlXVtwYE+2h2IKnhOXJdK4TDsPMCwpoMRVp5CnjX+RAiBVv8oExFSpXHQbQD
 IMF7eIq6bYxe+ZqIy+ZvKWbWy1cU0o58uHg721btBF7/8Eq0UL3ktjt/j4TUlPOilV4i
 EEMJXakm9eYJmDMEzIUIMiRUouoOYvrWNvCW2t/PQa+dq5gjvaysgClX77yIxCbeEEJN
 8ZPyl8vjT0mfYclS8+fBEAwhcbofXV/oLRgjeDyOJLIYg5LmJ+WKKL+VLKKAsjD0g1JY
 Uln/5zlEUJFYU9sWfXyPXS8MUhU3b0jHuPL8vSE6EGzSVLMPdT8/7s3dxqhmkItw16D4
 mI8w==
X-Gm-Message-State: AG10YOT2vJ5PL3m+lrxpzpDGBMbuSPKmAOCwYg4Gz63FaNto1IjwxEab3KWvqjU+5D7tC7McjuLpHI0zJ2SlDA==
MIME-Version: 1.0
X-Received: by 10.25.44.15 with SMTP id s15mr11076573lfs.81.1456168557163;
 Mon, 22 Feb 2016 11:15:57 -0800 (PST)
Received: by 10.114.233.36 with HTTP; Mon, 22 Feb 2016 11:15:57 -0800 (PST)
Date: Mon, 22 Feb 2016 11:15:57 -0800
Message-ID: <CAKj5MjvytDqkopCSaSZ8=n1d7zDjX4sP0ewr5_xQ9uqujuq96w@mail.gmail.com>
From: Clarylin L <clearasu@gmail.com>
To: dev@dpdk.org
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.15
Subject: [dpdk-dev] [dpdk-virtio] DPDK stopped working on virtio
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Mon, 22 Feb 2016 19:15:57 -0000

I am running DPDK application (testpmd) within a VM based on virtio. With
the same hypervisor and same DPDK code, it used to work well. But it
stopped working since last week. The VM's port could not receive anything.
I ran tcpdump on host's physical port, bridge interface as well as vnet
interface, and did see packets coming in. However on VM's port there was
nothing.

I ran gdb trying to debug, it hit function virtio_recv_mergeable_pkts(),
but nb_used=VIRTQUEUE_NUSED(rxvq) always gave 0. I guess it's because the
queue was empty.

I enabled the PMD debug logging and the only thing that might be an issue
was the following part. Other than this I could not see any thing that
could indicate potential issues.

Thu Feb 18 19:20:10 2016^@PMD: get_uio_dev(): Could not find uio resource
Thu Feb 18 19:20:10 2016^@PMD: virtio_resource_init_by_ioports(): PCI Port
IO found start=0xc040 with size=0x40

If someone can give any pointers that I should further look into, that'd be
very helpful. Appreciate your help!