Hi ,
Have a question on the Memif TX interface selection.
I have VPP with 2 worker threads connecting to an external application.
Have two memif interfaces, so that each thread can make use of one Memif
interface dedicately.
show memif
interface memif0/0
remote-name "remoteApp"
remote-interface "remoteIf"
socket-id 0 id 0 mode ip
flags admin-up connected
listener-fd 39 conn-fd 38
num-s2m-rings 1 num-m2s-rings 1 buffer-size 0 num-regions 2
region 0 size 65792 fd 43
region 1 size 264241152 fd 44
master-to-slave ring 0:
region 0 offset 32896 ring-size 2048 int-fd 52
head 5303 tail 3255 flags 0x0000 interrupts 1434
slave-to-master ring 0:
region 0 offset 0 ring-size 2048 int-fd 48
head 6480 tail 6480 flags 0x0001 interrupts 0
interface memif0/1
remote-name "remoteApp"
remote-interface "remoteIf"
socket-id 0 id 1 mode ip
flags admin-up connected
listener-fd 39 conn-fd 40
num-s2m-rings 1 num-m2s-rings 1 buffer-size 0 num-regions 2
region 0 size 65792 fd 46
region 1 size 264241152 fd 50
master-to-slave ring 0:
region 0 offset 32896 ring-size 2048 int-fd 57
head 2048 tail 0 flags 0x0000 interrupts 0
slave-to-master ring 0:
region 0 offset 0 ring-size 2048 int-fd 54
head 0 tail 0 flags 0x0001 interrupts 0
Added IP addresses on these two interfaces as below.
memif0/0 ==> 1.1.1.2
memif0/1 ==> 2.2.2.2
Correspondingly, on the remote APP, I created IP endpoints like 1.1.1.1 and
2.2.2.1
When I try to ping 1.1.1.1 from VPP, I expect that it will go memif0/0, but it
is going memif0/1
So, my question here is, what is the logic here for memif device selection for
TX traffic.
I see the code as below:
VNET_DEVICE_CLASS_TX_FN (memif_device_class) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
memif_main_t *nm = &memif_main;
vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
memif_if_t *mif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
>>>>> memif interface selection
I didnt quite understand the above logic and not sure if this will be helpful
to tie up a thread/IP interface to a particular memif interface or not.
Is there a way, where the TX traffic can be tied to a particular memif
Interface ?
--
Thanks & Regards,
Murthy
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