[dpdk-dev] Vmxnet3 pmd

[dpdk-dev] Vmxnet3 pmd

[Alex Markuze]

Hi, I Have a simple dpdk app - basically a KNI interface with the dpdk
layer serving only as a pipeline.

This allows me to ping between vEth0 on different VM's works great with ixgbevf.
Now I moved to ESXi5.5 , Ubuntu14.4 VM (Dpdk 1.7).
When running the same code*  I've discovered that the polling doesn't
retrieve any packets after vEth0 gents an IP. I've resolved this issue
by removing the dev restart calls I had in the callback.

        //      rte_eth_dev_stop(port_id);
        //      ret = rte_eth_dev_start(port_id);

Is this a know issue? how can I report a BUG if its not.

Thanks
Alex.

*Except this line I needed to add to setup the TXQ.
tx_conf.txq_flags |= (ETH_TXQ_FLAGS_NOMULTSEGS | ETH_TXQ_FLAGS_NOOFFLOADS);

Re: [dpdk-dev] Vmxnet3 pmd

[Patel, Rashmin N]

Hi Alex,

This is known issue with dev_stop of vmxnet3_pmd. Vmxnet3_cmd_ring_release() routine calls rte_free(ring->buf_info), which should be reused instead. Because it's not being reallocated at dev_start, otherwise reallocation is needed. I've a patch that works for me, I'll submit it after some testing.

Thanks,
Rashmin

-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Alex Markuze
Sent: Wednesday, August 13, 2014 3:14 AM
To: dev@dpdk.org
Subject: [dpdk-dev] Vmxnet3 pmd

Hi, I Have a simple dpdk app - basically a KNI interface with the dpdk layer serving only as a pipeline.

This allows me to ping between vEth0 on different VM's works great with ixgbevf.
Now I moved to ESXi5.5 , Ubuntu14.4 VM (Dpdk 1.7).
When running the same code*  I've discovered that the polling doesn't retrieve any packets after vEth0 gents an IP. I've resolved this issue by removing the dev restart calls I had in the callback.

        //      rte_eth_dev_stop(port_id);
        //      ret = rte_eth_dev_start(port_id);

Is this a know issue? how can I report a BUG if its not.

Thanks
Alex.

*Except this line I needed to add to setup the TXQ.
tx_conf.txq_flags |= (ETH_TXQ_FLAGS_NOMULTSEGS | ETH_TXQ_FLAGS_NOOFFLOADS);

[dpdk-dev] [PATCH] vmxnet3: fix crash on stop

[Stephen Hemminger]

The cmd_ring_release can be called twice if queue has already
been released. This cause crash on shutdown.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>


--- a/lib/librte_pmd_vmxnet3/vmxnet3_rxtx.c	2014-08-25 17:39:04.544119911 -0700
+++ b/lib/librte_pmd_vmxnet3/vmxnet3_rxtx.c	2014-08-25 17:39:04.544119911 -0700
@@ -173,6 +173,7 @@ vmxnet3_cmd_ring_release(vmxnet3_cmd_rin
 		vmxnet3_cmd_ring_adv_next2comp(ring);
 	}
 	rte_free(ring->buf_info);
+	ring->buf_info = NULL;
 }
 
 void

Re: [dpdk-dev] [PATCH] vmxnet3: fix crash on stop

[Thomas Monjalon]

> The cmd_ring_release can be called twice if queue has already
> been released. This cause crash on shutdown.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> 
> @@ -173,6 +173,7 @@ vmxnet3_cmd_ring_release(vmxnet3_cmd_rin
>  		vmxnet3_cmd_ring_adv_next2comp(ring);
>  	}
>  	rte_free(ring->buf_info);
> +	ring->buf_info = NULL;
>  }

Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

Applied for version 1.7.1.

Thanks
-- 
Thomas