From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <tom.barbette@ulg.ac.be>
Received: from serv108.segi.ulg.ac.be (serv108.segi.ulg.ac.be [139.165.32.111])
 by dpdk.org (Postfix) with ESMTP id 4715A3DC
 for <dev@dpdk.org>; Wed, 14 Dec 2016 16:13:54 +0100 (CET)
Received: from mbx12-zne.ulg.ac.be (serv470.segi.ulg.ac.be [139.165.32.199])
 by serv108.segi.ulg.ac.be (Postfix) with ESMTP id 1A300200F487
 for <dev@dpdk.org>; Wed, 14 Dec 2016 16:13:54 +0100 (CET)
Received: from localhost (localhost.localdomain [127.0.0.1])
 by mbx12-zne.ulg.ac.be (Postfix) with ESMTP id 13C9F129E906
 for <dev@dpdk.org>; Wed, 14 Dec 2016 16:13:54 +0100 (CET)
Received: from mbx12-zne.ulg.ac.be ([127.0.0.1])
 by localhost (mbx12-zne.ulg.ac.be [127.0.0.1]) (amavisd-new, port 10026)
 with ESMTP id kc-Crr3CZg78 for <dev@dpdk.org>;
 Wed, 14 Dec 2016 16:13:54 +0100 (CET)
Received: from mbx12-zne.ulg.ac.be (mbx12-zne.ulg.ac.be [139.165.32.199])
 by mbx12-zne.ulg.ac.be (Postfix) with ESMTP id F26C6129E97B
 for <dev@dpdk.org>; Wed, 14 Dec 2016 16:13:53 +0100 (CET)
Date: Wed, 14 Dec 2016 16:13:53 +0100 (CET)
From: tom.barbette@ulg.ac.be
To: dev@dpdk.org
Message-ID: <597694261.17905196.1481728433903.JavaMail.zimbra@ulg.ac.be>
In-Reply-To: <415214732.17903310.1481728244157.JavaMail.zimbra@ulg.ac.be>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.9.48.255]
X-Mailer: Zimbra 8.0.9_GA_6191 (ZimbraWebClient - FF50 (Linux)/8.0.9_GA_6191)
Thread-Topic: No packets received if burst is too small in rte_eth_rx_burst
Thread-Index: 5mC6Ngn/+rQSn9NSnP5ExKNHUNETOA==
Subject: [dpdk-dev] No packets received if burst is too small in
	rte_eth_rx_burst
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <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: Wed, 14 Dec 2016 15:13:54 -0000

Hi list,

Between 2.2.0 and 16.04 (up to at least 16.07.2 if not current), with the XL710 controller I do not get any packet when calling rte_eth_rx_burst if nb_pkts is too small. I would say smaller than 32. The input rate is not big, if that helps. But It should definitely get at least one packet per second.

Any ideas? Is that a bug or expected behaviour? Could be caused by other ABI changes?

Thanks,
Tom