From: "Lu, Wenzhuo" <wenzhuo.lu@intel.com>
To: Ori Zakin <ori@drivenets.com>,
"Zhang, Helin" <helin.zhang@intel.com>,
"Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Mbuf leak issue with IXGBE in vector mod
Date: Fri, 5 Aug 2016 01:00:28 +0000 [thread overview]
Message-ID: <6A0DE07E22DDAD4C9103DF62FEBC090903498740@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <498C834F-FDCA-452A-9B30-9C99378556DB@drivenets.com>
Hi Ori,
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ori Zakin
> Sent: Thursday, August 4, 2016 11:38 PM
> To: Zhang, Helin; Ananyev, Konstantin; dev@dpdk.org
> Subject: [dpdk-dev] Mbuf leak issue with IXGBE in vector mod
>
> Hi,
>
>
> 1. When calling rte_eth_dev_stop mbuf pool is depleted.
> There appears to be a race condition that occurs when RTE_IXGBE_INC_VECTOR
> is defined:
> ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue
> *rxq) { …….
>
> #ifdef RTE_IXGBE_INC_VECTOR
> rxq->rxrearm_start = 0;
> >>>>>>>>sleep here appears to solve
> rxq->rxrearm_nb = 0;
> #endif
>
>
> Behaviour also described here:
> http://dpdk.org/ml/archives/users/2016-April/000488.html
>
>
> 2. Steps to recreate issue:
> * rte_mempool_free_count
> * rte_eth_dev_stop
> * rte_mempool_free_count - should see a spike in allocated mbufs from
> mempool.
Have you stopped the rx/tx before do this stop/start? I think we'll hit this memory leak problem if the traffic is not stopped. There's an assumption that it’s APP's responsibility to stop rx/tx before operating the ports as we know dpdk is lockless.
>
> 3. 2 workarounds that appear to work:
> * Set CONFIG_RTE_IXGBE_INC_VECTOR=n.
> * Add sleep in ixgbe_reset_rx_queue
>
>
> Regards.
> Ori Zakin
next prev parent reply other threads:[~2016-08-05 1:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 15:37 Ori Zakin
2016-08-05 1:00 ` Lu, Wenzhuo [this message]
2016-08-08 9:45 ` Ori Zakin
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