Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

On 09/21/2015 11:25 AM, Marcel Apfelbaum wrote:
> On 09/21/2015 08:01 AM, Star Chang wrote:
>> Hi Marcel:
>>
>> Many thanks for you to contribute wiki page in how to configuring vhost-user type with openvsitch/qemu in VM environment.
>>
>> We bring 2 VMs up with vhost-user type. We can see eth0 interfaces created in 2 VMs with proper mac address we assign. After IP address assignment, 2 VMs could not PING to each other when they are in
>> the same subnet. There are not packets at all in count when running ovs-ofctl dump-ports :(
>>
>> However, we check link up state via ovs-ofctl utility but LINK_DOWN as below. Have any one with experiences and give some helps … Thanks!!
>>
>
> Hi,
>
> I would look into OVS log for specific issues:
>
>     journalctl  --since `date +%T --date="-10 minutes"`
>
> The above command will show you the last 10 minutes log.
> You are welcomed to show us the log.
>

I forgot to CC the list.

Thanks,
Marcel

> Thanks,
> Marcel
>
>> $ sudo ./utilities/ovs-ofctl show ovsbr0
>> OFPT_FEATURES_REPLY (xid=0x2): dpid:00000670da615e4a
>> n_tables:254, n_buffers:256
>> capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
>> actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
>> 1(vhost-user1): addr:00:00:00:00:00:00
>> config: PORT_DOWN
>> state: LINK_DOWN
>> speed: 0 Mbps now, 0 Mbps max
>> 2(vhost-user2): addr:00:00:00:00:00:00
>> config: PORT_DOWN
>> state: LINK_DOWN
>> speed: 0 Mbps now, 0 Mbps max
>> LOCAL(ovsbr0): addr:06:70:da:61:5e:4a
>> config: PORT_DOWN
>> state: LINK_DOWN
>> current: 10MB-FD COPPER
>> speed: 10 Mbps now, 0 Mbps max
>> OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
>>
>>
>>
>> Thanks,
>> Star
>>
>> --
>> The future belongs to those who believe in the beauty of their dreams.
>>
>>
>

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Star Chang]

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Thanks Marcel!!!

After tailing the logs and basic troubleshooting, we finally can have 2 VMs
to ping to each other. One dpdkvhostuser interface is for each VM and we
have to new add flows based on dpdkvhostuser ofport numbers.

Another issue we might post it to proper mail loop is that we run
pktgen-dpdk 2.9.1 inside of VM but no packets counted from pktgen terminal
display. It is so weird that we only see 128 tx packets bursted out and
then nothing is continue working. After that, we try to dump-flows via
ovs-ofctl utility but it shows "connection refued". I am not sure have any
one of you guys ideas here? Thanks!!!


Bridge "ovsbr0"

        Port "ovsbr0"

            Interface "ovsbr0"

                type: internal

        Port "dpdk1"

            Interface "dpdk1"

                type: dpdk

        Port "dpdk0"

            Interface "dpdk0"

                type: dpdk

        Port "vhost-user1"

            Interface "vhost-user1"

                type: dpdkvhostuser

        Port "vhost-user0"

            Interface "vhost-user0"

                type: dpdkvhostuser

On Tue, Sep 22, 2015 at 2:34 AM, Marcel Apfelbaum <marcel@redhat.com> wrote:

> On 09/21/2015 11:25 AM, Marcel Apfelbaum wrote:
>
>> On 09/21/2015 08:01 AM, Star Chang wrote:
>>
>>> Hi Marcel:
>>>
>>> Many thanks for you to contribute wiki page in how to configuring
>>> vhost-user type with openvsitch/qemu in VM environment.
>>>
>>> We bring 2 VMs up with vhost-user type. We can see eth0 interfaces
>>> created in 2 VMs with proper mac address we assign. After IP address
>>> assignment, 2 VMs could not PING to each other when they are in
>>> the same subnet. There are not packets at all in count when running
>>> ovs-ofctl dump-ports :(
>>>
>>> However, we check link up state via ovs-ofctl utility but LINK_DOWN as
>>> below. Have any one with experiences and give some helps … Thanks!!
>>>
>>>
>> Hi,
>>
>> I would look into OVS log for specific issues:
>>
>>     journalctl  --since `date +%T --date="-10 minutes"`
>>
>> The above command will show you the last 10 minutes log.
>> You are welcomed to show us the log.
>>
>>
> I forgot to CC the list.
>
> Thanks,
> Marcel
>
>
> Thanks,
>> Marcel
>>
>> $ sudo ./utilities/ovs-ofctl show ovsbr0
>>> OFPT_FEATURES_REPLY (xid=0x2): dpid:00000670da615e4a
>>> n_tables:254, n_buffers:256
>>> capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
>>> actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src
>>> mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
>>> 1(vhost-user1): addr:00:00:00:00:00:00
>>> config: PORT_DOWN
>>> state: LINK_DOWN
>>> speed: 0 Mbps now, 0 Mbps max
>>> 2(vhost-user2): addr:00:00:00:00:00:00
>>> config: PORT_DOWN
>>> state: LINK_DOWN
>>> speed: 0 Mbps now, 0 Mbps max
>>> LOCAL(ovsbr0): addr:06:70:da:61:5e:4a
>>> config: PORT_DOWN
>>> state: LINK_DOWN
>>> current: 10MB-FD COPPER
>>> speed: 10 Mbps now, 0 Mbps max
>>> OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
>>>
>>>
>>>
>>> Thanks,
>>> Star
>>>
>>> --
>>> The future belongs to those who believe in the beauty of their dreams.
>>>
>>>
>>>
>>
>


-- 
The future belongs to those who believe in the beauty of their dreams.

[-- Attachment #2: Type: text/html, Size: 5951 bytes --]

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

On 09/22/2015 08:43 AM, Star Chang wrote:
> Thanks Marcel!!!
>
> After tailing the logs and basic troubleshooting, we finally can have 2 VMs to ping to each other. One dpdkvhostuser interface is for each VM and we have to new add flows based on dpdkvhostuser ofport
> numbers.

Hi,

Good to hear this!
If you think I should add something to the wiki please do tell.

>
> Another issue we might post it to proper mail loop is that we run pktgen-dpdk 2.9.1 inside of VM but no packets counted from pktgen terminal display. It is so weird that we only see 128 tx packets
> bursted out and then nothing is continue working. After that, we try to dump-flows via ovs-ofctl utility but it shows "connection refued". I am not sure have any one of you guys ideas here? Thanks!!!
>

I am sorry but my OVS knowledge is rather limited. I think this is a question for the OVS mailing list.

Thanks,
Marcel

>
> Bridge "ovsbr0"
>
> Port "ovsbr0"
>
> Interface "ovsbr0"
>
> type: internal
>
> Port "dpdk1"
>
> Interface "dpdk1"
>
> type: dpdk
>
> Port "dpdk0"
>
> Interface "dpdk0"
>
> type: dpdk
>
> Port "vhost-user1"
>
> Interface "vhost-user1"
>
> type: dpdkvhostuser
>
> Port "vhost-user0"
>
> Interface "vhost-user0"
>
> type: dpdkvhostuser
>
>
> On Tue, Sep 22, 2015 at 2:34 AM, Marcel Apfelbaum <marcel@redhat.com <mailto:marcel@redhat.com>> wrote:
>
>     On 09/21/2015 11:25 AM, Marcel Apfelbaum wrote:
>
>         On 09/21/2015 08:01 AM, Star Chang wrote:
>
>             Hi Marcel:
>
>             Many thanks for you to contribute wiki page in how to configuring vhost-user type with openvsitch/qemu in VM environment.
>
>             We bring 2 VMs up with vhost-user type. We can see eth0 interfaces created in 2 VMs with proper mac address we assign. After IP address assignment, 2 VMs could not PING to each other when
>             they are in
>             the same subnet. There are not packets at all in count when running ovs-ofctl dump-ports :(
>
>             However, we check link up state via ovs-ofctl utility but LINK_DOWN as below. Have any one with experiences and give some helps … Thanks!!
>
>
>         Hi,
>
>         I would look into OVS log for specific issues:
>
>              journalctl  --since `date +%T --date="-10 minutes"`
>
>         The above command will show you the last 10 minutes log.
>         You are welcomed to show us the log.
>
>
>     I forgot to CC the list.
>
>     Thanks,
>     Marcel
>
>
>         Thanks,
>         Marcel
>
>             $ sudo ./utilities/ovs-ofctl show ovsbr0
>             OFPT_FEATURES_REPLY (xid=0x2): dpid:00000670da615e4a
>             n_tables:254, n_buffers:256
>             capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
>             actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
>             1(vhost-user1): addr:00:00:00:00:00:00
>             config: PORT_DOWN
>             state: LINK_DOWN
>             speed: 0 Mbps now, 0 Mbps max
>             2(vhost-user2): addr:00:00:00:00:00:00
>             config: PORT_DOWN
>             state: LINK_DOWN
>             speed: 0 Mbps now, 0 Mbps max
>             LOCAL(ovsbr0): addr:06:70:da:61:5e:4a
>             config: PORT_DOWN
>             state: LINK_DOWN
>             current: 10MB-FD COPPER
>             speed: 10 Mbps now, 0 Mbps max
>             OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
>
>
>
>             Thanks,
>             Star
>
>             --
>             The future belongs to those who believe in the beauty of their dreams.
>
>
>
>
>
>
>
> --
> The future belongs to those who believe in the beauty of their dreams.
>
>

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Alexandre DERUMIER]

Hi,

Ovs documentation say that 1GB hugepage are needed
https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md

is is true ?  (as the wiki say 2M hugepages)


----- Mail original -----
De: "Star Chang" <star.idv@gmail.com>
À: "Marcel Apfelbaum" <marcel@redhat.com>
Cc: "qemu-devel" <qemu-devel@nongnu.org>
Envoyé: Mardi 22 Septembre 2015 07:43:13
Objet: Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

Thanks Marcel!!! 


After tailing the logs and basic troubleshooting, we finally can have 2 VMs to ping to each other. One dpdkvhostuser interface is for each VM and we have to new add flows based on dpdkvhostuser ofport numbers. 


Another issue we might post it to proper mail loop is that we run pktgen-dpdk 2.9.1 inside of VM but no packets counted from pktgen terminal display. It is so weird that we only see 128 tx packets bursted out and then nothing is continue working. After that, we try to dump-flows via ovs-ofctl utility but it shows "connection refued". I am not sure have any one of you guys ideas here? Thanks!!! 





Bridge "ovsbr0" 

Port "ovsbr0" 

Interface "ovsbr0" 

type: internal 

Port "dpdk1" 

Interface "dpdk1" 

type: dpdk 

Port "dpdk0" 

Interface "dpdk0" 

type: dpdk 

Port "vhost-user1" 

Interface "vhost-user1" 

type: dpdkvhostuser 

Port "vhost-user0" 

Interface "vhost-user0" 

type: dpdkvhostuser 

On Tue, Sep 22, 2015 at 2:34 AM, Marcel Apfelbaum < marcel@redhat.com > wrote: 


On 09/21/2015 11:25 AM, Marcel Apfelbaum wrote: 

BQ_BEGIN
On 09/21/2015 08:01 AM, Star Chang wrote: 

BQ_BEGIN
Hi Marcel: 

Many thanks for you to contribute wiki page in how to configuring vhost-user type with openvsitch/qemu in VM environment. 

We bring 2 VMs up with vhost-user type. We can see eth0 interfaces created in 2 VMs with proper mac address we assign. After IP address assignment, 2 VMs could not PING to each other when they are in 
the same subnet. There are not packets at all in count when running ovs-ofctl dump-ports :( 

However, we check link up state via ovs-ofctl utility but LINK_DOWN as below. Have any one with experiences and give some helps … Thanks!! 




Hi, 

I would look into OVS log for specific issues: 

journalctl --since `date +%T --date="-10 minutes"` 

The above command will show you the last 10 minutes log. 
You are welcomed to show us the log. 


BQ_END

I forgot to CC the list. 

Thanks, 
Marcel 



BQ_BEGIN
Thanks, 
Marcel 


BQ_BEGIN
$ sudo ./utilities/ovs-ofctl show ovsbr0 
OFPT_FEATURES_REPLY (xid=0x2): dpid:00000670da615e4a 
n_tables:254, n_buffers:256 
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP 
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst 
1(vhost-user1): addr:00:00:00:00:00:00 
config: PORT_DOWN 
state: LINK_DOWN 
speed: 0 Mbps now, 0 Mbps max 
2(vhost-user2): addr:00:00:00:00:00:00 
config: PORT_DOWN 
state: LINK_DOWN 
speed: 0 Mbps now, 0 Mbps max 
LOCAL(ovsbr0): addr:06:70:da:61:5e:4a 
config: PORT_DOWN 
state: LINK_DOWN 
current: 10MB-FD COPPER 
speed: 10 Mbps now, 0 Mbps max 
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0 



Thanks, 
Star 

-- 
The future belongs to those who believe in the beauty of their dreams. 



BQ_END


BQ_END


BQ_END




-- 
The future belongs to those who believe in the beauty of their dreams. 

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

On 09/22/2015 05:17 PM, Alexandre DERUMIER wrote:
> Hi,
>
> Ovs documentation say that 1GB hugepage are needed
> https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md
>
> is is true ?  (as the wiki say 2M hugepages)

Not for this scenario :) . For this one 2M hugepages are enough (tested already by  a few developers), try it in your laptop!

Thanks,
Marcel

>
>
> ----- Mail original -----
> De: "Star Chang" <star.idv@gmail.com>
> À: "Marcel Apfelbaum" <marcel@redhat.com>
> Cc: "qemu-devel" <qemu-devel@nongnu.org>
> Envoyé: Mardi 22 Septembre 2015 07:43:13
> Objet: Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend
>
> Thanks Marcel!!!
>
>
> After tailing the logs and basic troubleshooting, we finally can have 2 VMs to ping to each other. One dpdkvhostuser interface is for each VM and we have to new add flows based on dpdkvhostuser ofport numbers.
>
>
> Another issue we might post it to proper mail loop is that we run pktgen-dpdk 2.9.1 inside of VM but no packets counted from pktgen terminal display. It is so weird that we only see 128 tx packets bursted out and then nothing is continue working. After that, we try to dump-flows via ovs-ofctl utility but it shows "connection refued". I am not sure have any one of you guys ideas here? Thanks!!!
>
>
>
>
>
> Bridge "ovsbr0"
>
> Port "ovsbr0"
>
> Interface "ovsbr0"
>
> type: internal
>
> Port "dpdk1"
>
> Interface "dpdk1"
>
> type: dpdk
>
> Port "dpdk0"
>
> Interface "dpdk0"
>
> type: dpdk
>
> Port "vhost-user1"
>
> Interface "vhost-user1"
>
> type: dpdkvhostuser
>
> Port "vhost-user0"
>
> Interface "vhost-user0"
>
> type: dpdkvhostuser
>
> On Tue, Sep 22, 2015 at 2:34 AM, Marcel Apfelbaum < marcel@redhat.com > wrote:
>
>
> On 09/21/2015 11:25 AM, Marcel Apfelbaum wrote:
>
> BQ_BEGIN
> On 09/21/2015 08:01 AM, Star Chang wrote:
>
> BQ_BEGIN
> Hi Marcel:
>
> Many thanks for you to contribute wiki page in how to configuring vhost-user type with openvsitch/qemu in VM environment.
>
> We bring 2 VMs up with vhost-user type. We can see eth0 interfaces created in 2 VMs with proper mac address we assign. After IP address assignment, 2 VMs could not PING to each other when they are in
> the same subnet. There are not packets at all in count when running ovs-ofctl dump-ports :(
>
> However, we check link up state via ovs-ofctl utility but LINK_DOWN as below. Have any one with experiences and give some helps … Thanks!!
>
>
>
>
> Hi,
>
> I would look into OVS log for specific issues:
>
> journalctl --since `date +%T --date="-10 minutes"`
>
> The above command will show you the last 10 minutes log.
> You are welcomed to show us the log.
>
>
> BQ_END
>
> I forgot to CC the list.
>
> Thanks,
> Marcel
>
>
>
> BQ_BEGIN
> Thanks,
> Marcel
>
>
> BQ_BEGIN
> $ sudo ./utilities/ovs-ofctl show ovsbr0
> OFPT_FEATURES_REPLY (xid=0x2): dpid:00000670da615e4a
> n_tables:254, n_buffers:256
> capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
> actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
> 1(vhost-user1): addr:00:00:00:00:00:00
> config: PORT_DOWN
> state: LINK_DOWN
> speed: 0 Mbps now, 0 Mbps max
> 2(vhost-user2): addr:00:00:00:00:00:00
> config: PORT_DOWN
> state: LINK_DOWN
> speed: 0 Mbps now, 0 Mbps max
> LOCAL(ovsbr0): addr:06:70:da:61:5e:4a
> config: PORT_DOWN
> state: LINK_DOWN
> current: 10MB-FD COPPER
> speed: 10 Mbps now, 0 Mbps max
> OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
>
>
>
> Thanks,
> Star
>

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[chandrasekar kannan]

[-- Attachment #1: Type: text/plain, Size: 2338 bytes --]

http://wiki.qemu.org/Features/vhost-user-ovs-dpdk

I'm running to problems attempting to try this out. qemu errors out with

qemu-system-x86_64: -object
memory-backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on:
unable to map backing store for hugepages: Cannot allocate memory

http://pastebin.com/raw.php?i=kSkU8S03

Could someone take a look at this and see what might be wrong ?

thanks,
-Chandra

On Thu, Sep 17, 2015 at 01:08:36PM +0300, Marcel Apfelbaum wrote:
>* On 09/16/2015 08:44 PM, Flavio Leitner wrote:*
>* >On Thu, Sep 10, 2015 at 10:51:19PM +0300, Marcel Apfelbaum wrote:*
>* >>Hi,*
>* >>*
>* >>The page describes how to setup an environment that allows *
>* >>testing/developing*
>* >>vhost-user using ovs (with dpdk) as backend.*
>* >>*
>* >>A regular pc machine can be used, no need for several hosts, a 'dpdk *
>* >>enabled' NIC or 1G huge-pages.*
>* >>*
>* >>The goal is to connect guests' virtio-net devices having vhost-user backend *
>* >>to OVS dpdkvhostuser ports*
>* >>and be able to run any kind of network traffic between them.*
>* >>*
>* >>The page can be found at:*
>* >>http://wiki.qemu.org/Features/vhost-user-ovs-dpdk <http://wiki.qemu.org/Features/vhost-user-ovs-dpdk>*
>* >>*
>* >>I want to keep it as simple as possible.*
>* >>If you see steps that can be skipped or unneeded configuration please let *
>* >>me know*
>* >>or feel free to update the page.*
>* >*
>* >I gave a quick look and found couple issues.  It seems to be missing*
>* >the installing steps for qemu.  Also the eventfd_link module is only*
>* >needed for vhost-cuse, so you don't need to build/install/load at all.*
>* Hi Flavio,*
>* Thank you for reviewing the document!*
>
>* For some reason I thought we still need eventfd_link to notify the guests*
>* when new packets arrive. Indeed we don't need this anymore, I updated the *
>* wiki page.*

> We use the one provided by kernel.  The eventfd_link on DPDK is special for
> vhost-cuse:
> https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md#dpdk-vhost-cuse-prerequisites


>* Regarding QEMU, can you please point me to the missing setup steps?*
>* (I think I already took care of them, anyway I want to be sure)*

> Yup, I missed that you are running qemu from the builddir, not from
> the system, so you don't need to install it.

> Thanks again,
> fbl

[-- Attachment #2: Type: text/html, Size: 3509 bytes --]

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

On 09/18/2015 08:16 PM, chandrasekar kannan wrote:
> http://wiki.qemu.org/Features/vhost-user-ovs-dpdk
>
> I'm running to problems attempting to try this out. qemu errors out with
>
> qemu-system-x86_64: -object memory-backend-file,id=mem,size=1024M,mem-path=/dev/hugepages,share=on: unable to map backing store for hugepages: Cannot allocate memory
>
> http://pastebin.com/raw.php?i=kSkU8S03
>
> Could someone take a look at this and see what might be wrong ?

Hi,

It seems all the huge pages are already allocated:

     HugePages_Total:    2048
=>  HugePages_Free:        0
     HugePages_Rsvd:        0
     HugePages_Surp:        0

You can try to allocate more:
Run as root:
echo 3072 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

Thanks,
Marcel

>
> thanks,
> -Chandra
>
> On Thu, Sep 17, 2015 at 01:08:36PM +0300, Marcel Apfelbaum wrote:
>>/On 09/16/2015 08:44 PM, Flavio Leitner wrote:/
>>/ >On Thu, Sep 10, 2015 at 10:51:19PM +0300, Marcel Apfelbaum wrote:/
>>/ >>Hi,/
>>/ >>/
>>/ >>The page describes how to setup an environment that allows /
>>/ >>testing/developing/
>>/ >>vhost-user using ovs (with dpdk) as backend./
>>/ >>/
>>/ >>A regular pc machine can be used, no need for several hosts, a 'dpdk /
>>/ >>enabled' NIC or 1G huge-pages./
>>/ >>/
>>/ >>The goal is to connect guests' virtio-net devices having vhost-user backend /
>>/ >>to OVS dpdkvhostuser ports/
>>/ >>and be able to run any kind of network traffic between them./
>>/ >>/
>>/ >>The page can be found at:/
>>/ >>http://wiki.qemu.org/Features/vhost-user-ovs-dpdk/
>>/ >>/
>>/ >>I want to keep it as simple as possible./
>>/ >>If you see steps that can be skipped or unneeded configuration please let /
>>/ >>me know/
>>/ >>or feel free to update the page./
>>/ >/
>>/ >I gave a quick look and found couple issues. It seems to be missing/
>>/ >the installing steps for qemu. Also the eventfd_link module is only/
>>/ >needed for vhost-cuse, so you don't need to build/install/load at all./
>>/Hi Flavio,/
>>/Thank you for reviewing the document!/
>>//
>>/For some reason I thought we still need eventfd_link to notify the guests/
>>/when new packets arrive. Indeed we don't need this anymore, I updated the /
>>/wiki page./
>
>> We use the one provided by kernel.  The eventfd_link on DPDK is special for
>> vhost-cuse:
>>https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md#dpdk-vhost-cuse-prerequisites
>
>
>>/Regarding QEMU, can you please point me to the missing setup steps?/
>>/(I think I already took care of them, anyway I want to be sure)/
>
>> Yup, I missed that you are running qemu from the builddir, not from
>> the system, so you don't need to install it.
>
>> Thanks again,
>> fbl
>

[Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

Hi,

The page describes how to setup an environment that allows testing/developing
vhost-user using ovs (with dpdk) as backend.

A regular pc machine can be used, no need for several hosts, a 'dpdk enabled' NIC or 1G huge-pages.

The goal is to connect guests' virtio-net devices having vhost-user backend to OVS dpdkvhostuser ports
and be able to run any kind of network traffic between them.

The page can be found at:
http://wiki.qemu.org/Features/vhost-user-ovs-dpdk

I want to keep it as simple as possible.
If you see steps that can be skipped or unneeded configuration please let me know
or feel free to update the page.

Thanks,
Marcel

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Flavio Leitner]

On Thu, Sep 10, 2015 at 10:51:19PM +0300, Marcel Apfelbaum wrote:
> Hi,
> 
> The page describes how to setup an environment that allows testing/developing
> vhost-user using ovs (with dpdk) as backend.
> 
> A regular pc machine can be used, no need for several hosts, a 'dpdk enabled' NIC or 1G huge-pages.
> 
> The goal is to connect guests' virtio-net devices having vhost-user backend to OVS dpdkvhostuser ports
> and be able to run any kind of network traffic between them.
> 
> The page can be found at:
> http://wiki.qemu.org/Features/vhost-user-ovs-dpdk
> 
> I want to keep it as simple as possible.
> If you see steps that can be skipped or unneeded configuration please let me know
> or feel free to update the page.

I gave a quick look and found couple issues.  It seems to be missing
the installing steps for qemu.  Also the eventfd_link module is only
needed for vhost-cuse, so you don't need to build/install/load at all.

Thanks for doing that Marcel!
fbl

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Marcel Apfelbaum]

On 09/16/2015 08:44 PM, Flavio Leitner wrote:
> On Thu, Sep 10, 2015 at 10:51:19PM +0300, Marcel Apfelbaum wrote:
>> Hi,
>>
>> The page describes how to setup an environment that allows testing/developing
>> vhost-user using ovs (with dpdk) as backend.
>>
>> A regular pc machine can be used, no need for several hosts, a 'dpdk enabled' NIC or 1G huge-pages.
>>
>> The goal is to connect guests' virtio-net devices having vhost-user backend to OVS dpdkvhostuser ports
>> and be able to run any kind of network traffic between them.
>>
>> The page can be found at:
>> http://wiki.qemu.org/Features/vhost-user-ovs-dpdk
>>
>> I want to keep it as simple as possible.
>> If you see steps that can be skipped or unneeded configuration please let me know
>> or feel free to update the page.
>
> I gave a quick look and found couple issues.  It seems to be missing
> the installing steps for qemu.  Also the eventfd_link module is only
> needed for vhost-cuse, so you don't need to build/install/load at all.
Hi Flavio,
Thank you for reviewing the document!

For some reason I thought we still need eventfd_link to notify the guests
when new packets arrive. Indeed we don't need this anymore, I updated the wiki page.

Regarding QEMU, can you please point me to the missing setup steps?
(I think I already took care of them, anyway I want to be sure)


Thanks,
Marcel

>
> Thanks for doing that Marcel!
> fbl
>

Re: [Qemu-devel] [wiki] New wiki page - vhost-user setup with ovs/dpdk backend

[Flavio Leitner]

On Thu, Sep 17, 2015 at 01:08:36PM +0300, Marcel Apfelbaum wrote:
> On 09/16/2015 08:44 PM, Flavio Leitner wrote:
> >On Thu, Sep 10, 2015 at 10:51:19PM +0300, Marcel Apfelbaum wrote:
> >>Hi,
> >>
> >>The page describes how to setup an environment that allows testing/developing
> >>vhost-user using ovs (with dpdk) as backend.
> >>
> >>A regular pc machine can be used, no need for several hosts, a 'dpdk enabled' NIC or 1G huge-pages.
> >>
> >>The goal is to connect guests' virtio-net devices having vhost-user backend to OVS dpdkvhostuser ports
> >>and be able to run any kind of network traffic between them.
> >>
> >>The page can be found at:
> >>http://wiki.qemu.org/Features/vhost-user-ovs-dpdk
> >>
> >>I want to keep it as simple as possible.
> >>If you see steps that can be skipped or unneeded configuration please let me know
> >>or feel free to update the page.
> >
> >I gave a quick look and found couple issues.  It seems to be missing
> >the installing steps for qemu.  Also the eventfd_link module is only
> >needed for vhost-cuse, so you don't need to build/install/load at all.
> Hi Flavio,
> Thank you for reviewing the document!
> 
> For some reason I thought we still need eventfd_link to notify the guests
> when new packets arrive. Indeed we don't need this anymore, I updated the wiki page.

We use the one provided by kernel.  The eventfd_link on DPDK is special for
vhost-cuse: 
https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md#dpdk-vhost-cuse-prerequisites


> Regarding QEMU, can you please point me to the missing setup steps?
> (I think I already took care of them, anyway I want to be sure)

Yup, I missed that you are running qemu from the builddir, not from
the system, so you don't need to install it.

Thanks again,
fbl