Hi Raj, Inline.
> On May 31, 2020, at 8:10 PM, Raj Kumar <raj.gauta...@gmail.com> wrote: > > Hi Florin, > The UDPC connections are working fine . I was making a basic mistake. For the > second application, I missed to export the LD_LIBRARY_PATH to the build > directory because of that application was linking to the old library ( form > /usr/lib64). > Now, I tried both UDP tx and rx connection ( UDP connected) . Both are > working fine. FC: Great! > > I have a question; all the connections originating from VPP host stack (UDP > tx) are always going on the worker thread 1. Is there any way to assign > these connections to the different worker threads ( similar to the UDP rx) ? > I can not rely on the receiver ( to initiate the connection) as that is a > third party application. FC: At this time no. > > Earlier with the previous VPP release , I tried by assigning UDP tx > connections to the different worker threads in a round robin manner . I am > wondering if we can try some thing similar in the new release. It might just work. Let me know if you try it out. > > Also, please let me know in which VPP release, the following patches would be > available. FC: The first two are part of 20.05, the third will be ported to the first 20.05 point release. Regards, Florin > > [1] https://gerrit.fd.io/r/c/vpp/+/27111 > <https://gerrit.fd.io/r/c/vpp/+/27111> > [2] https://gerrit.fd.io/r/c/vpp/+/27106 > <https://gerrit.fd.io/r/c/vpp/+/27106> > [3] https://gerrit.fd.io/r/c/vpp/+/27235 > <https://gerrit.fd.io/r/c/vpp/+/27235> > > > Here are the VPP stats - > > vpp# sh app server > Connection App Wrk > [0:0][U] 2001:5b0:ffff:701:b883:31f:29e:udp6_rx[shm] 1 > [0:1][U] 2001:5b0:ffff:701:b883:31f:29e:udp6_rx[shm] 1 > vpp# > vpp# sh app client > Connection App > [1:0][U] 2001:5b0:ffff:701:b883:31f:29e:udp6_tx[shm] > [1:1][U] 2001:5b0:ffff:701:b883:31f:29e:udp6_tx[shm] > vpp# > vpp# sh session verbose > Connection State Rx-f > Tx-f > [0:0][U] 2001:5b0:ffff:701:b883:31f:29e:9880:12345LISTEN 0 0 > [0:1][U] 2001:5b0:ffff:701:b883:31f:29e:9881:56789LISTEN 0 0 > Thread 0: active sessions 2 > > Connection State Rx-f > Tx-f > [1:0][U] 2001:5b0:ffff:701:b883:31f:29e:9880:58199OPENED 0 > 3999756 > [1:1][U] 2001:5b0:ffff:701:b883:31f:29e:9880:10442OPENED 0 > 3999756 > Thread 1: active sessions 2 > > Connection State Rx-f > Tx-f > [2:0][U] 2001:5b0:ffff:701:b883:31f:29e:9881:56789OPENED 0 0 > Thread 2: active sessions 1 > Thread 3: no sessions > > Connection State Rx-f > Tx-f > [4:0][U] 2001:5b0:ffff:701:b883:31f:29e:9880:12345OPENED 0 0 > Thread 4: active sessions 1 > > Thanks, > -Raj > > > > On Sun, May 31, 2020 at 7:35 PM Florin Coras <fcoras.li...@gmail.com > <mailto:fcoras.li...@gmail.com>> wrote: > Hi Raj, > > Inline. > >> On May 31, 2020, at 4:07 PM, Raj Kumar <raj.gauta...@gmail.com >> <mailto:raj.gauta...@gmail.com>> wrote: >> >> Hi Florin, >> I was trying this test with debug binaries, but as soon as I enable the >> interface , vpp is crashing. > > FC: It looks like somehow corrupted buffers make their way into the error > drop node. What traffic are you running through vpp and is this master or are > you running some custom code? > >> >> On the original problem ( multiple listener); if I open multiple sockets >> from the same multi threaded application then it works fine. But, if I start >> another application then only I see the VPP crash( which I mentioned in my >> previous email). > > FC: Is the second app trying to listen on the same ip:port pair? That is not > supported and the second listen request should’ve been rejected. Do you have > a bt? > > Regards, > Florin > >> >> Here is the stack trace with debug binaries which is crashing on startup. >> Please let me know what wrong I am doing here ? >> >> >> #0 0x00007ffff4b748df in raise () from /lib64/libc.so.6 >> #1 0x00007ffff4b5ecf5 in abort () from /lib64/libc.so.6 >> #2 0x0000000000407a28 in os_panic () at /opt/vpp/src/vpp/vnet/main.c:366 >> #3 0x00007ffff5a279af in debugger () at /opt/vpp/src/vppinfra/error.c:84 >> #4 0x00007ffff5a27d92 in _clib_error (how_to_die=2, >> function_name=0x7ffff663d540 <__FUNCTION__.35997> >> "vlib_buffer_validate_alloc_free", >> line_number=367, fmt=0x7ffff663d0ba "%s %U buffer 0x%x") at >> /opt/vpp/src/vppinfra/error.c:143 >> #5 0x00007ffff65752a3 in vlib_buffer_validate_alloc_free (vm=0x7ffff6866340 >> <vlib_global_main>, buffers=0x7fffb586d630, n_buffers=1, >> expected_state=VLIB_BUFFER_KNOWN_ALLOCATED) at >> /opt/vpp/src/vlib/buffer.c:366 >> #6 0x00007ffff65675f0 in vlib_buffer_pool_put (vm=0x7ffff6866340 >> <vlib_global_main>, buffer_pool_index=0 '\000', buffers=0x7fffb586d630, >> n_buffers=1) at /opt/vpp/src/vlib/buffer_funcs.h:754 >> #7 0x00007ffff6567dde in vlib_buffer_free_inline (vm=0x7ffff6866340 >> <vlib_global_main>, buffers=0x7fffb67e9b14, n_buffers=0, maybe_next=1) >> at /opt/vpp/src/vlib/buffer_funcs.h:924 >> #8 0x00007ffff6567e2e in vlib_buffer_free (vm=0x7ffff6866340 >> <vlib_global_main>, buffers=0x7fffb67e9b10, n_buffers=1) >> at /opt/vpp/src/vlib/buffer_funcs.h:943 >> #9 0x00007ffff6568cb0 in process_drop_punt (vm=0x7ffff6866340 >> <vlib_global_main>, node=0x7fffb5475e00, frame=0x7fffb67e9b00, >> disposition=ERROR_DISPOSITION_DROP) at /opt/vpp/src/vlib/drop.c:231 >> #10 0x00007ffff6568db0 in error_drop_node_fn_hsw (vm=0x7ffff6866340 >> <vlib_global_main>, node=0x7fffb5475e00, frame=0x7fffb67e9b00) >> at /opt/vpp/src/vlib/drop.c:247 >> #11 0x00007ffff65c3447 in dispatch_node (vm=0x7ffff6866340 >> <vlib_global_main>, node=0x7fffb5475e00, type=VLIB_NODE_TYPE_INTERNAL, >> dispatch_state=VLIB_NODE_STATE_POLLING, frame=0x7fffb67e9b00, >> last_time_stamp=15480427682338516) at /opt/vpp/src/vlib/main.c:1235 >> #12 0x00007ffff65c3c02 in dispatch_pending_node (vm=0x7ffff6866340 >> <vlib_global_main>, pending_frame_index=2, >> last_time_stamp=15480427682338516) at /opt/vpp/src/vlib/main.c:1403 >> #13 0x00007ffff65c58c9 in vlib_main_or_worker_loop (vm=0x7ffff6866340 >> <vlib_global_main>, is_main=1) at /opt/vpp/src/vlib/main.c:1862 >> #14 0x00007ffff65c6320 in vlib_main_loop (vm=0x7ffff6866340 >> <vlib_global_main>) at /opt/vpp/src/vlib/main.c:1990 >> #15 0x00007ffff65c70e0 in vlib_main (vm=0x7ffff6866340 <vlib_global_main>, >> input=0x7fffb586efb0) at /opt/vpp/src/vlib/main.c:2236 >> #16 0x00007ffff662f311 in thread0 (arg=140737329390400) at >> /opt/vpp/src/vlib/unix/main.c:658 >> #17 0x00007ffff5a465cc in clib_calljmp () at >> /opt/vpp/src/vppinfra/longjmp.S:123 >> #18 0x00007fffffffd0a0 in ?? () >> #19 0x00007ffff662f8a7 in vlib_unix_main (argc=50, argv=0x705f00) at >> /opt/vpp/src/vlib/unix/main.c:730 >> #20 0x0000000000407387 in main (argc=50, argv=0x705f00) at >> /opt/vpp/src/vpp/vnet/main.c:291 >> >> thanks, >> -Raj >> >> On Mon, May 25, 2020 at 5:02 PM Florin Coras <fcoras.li...@gmail.com >> <mailto:fcoras.li...@gmail.com>> wrote: >> Hi Raj, >> >> Okay, so at least with that we have support for bounded listeners (note that >> [2] was merged but to set the connected option you now have to use >> vppcom_session_attr). >> >> As for the trace, something seems off. Why exactly does it crash? It looks >> as if session_get_transport_proto (ls) crashes because of ls being null, but >> prior to that ls is dereferenced and it does’t crash. Could you try with >> debug binaries? >> >> Regards, >> Florin >> >>> On May 25, 2020, at 1:43 PM, Raj Kumar <raj.gauta...@gmail.com >>> <mailto:raj.gauta...@gmail.com>> wrote: >>> >>> Hi Florin, >>> This works fine with single udp listener. I can see connections going on >>> different cores. But, if I run more than one listener then VPP is crashing. >>> Here are the VPP stack traces - >>> >>> (gdb) bt >>> #0 0x0000000000000000 in ?? () >>> #1 0x00007ffff7761239 in session_listen (ls=<optimized out>, >>> sep=sep@entry=0x7fffb557fd50) at >>> /opt/vpp/src/vnet/session/session_types.h:247 >>> #2 0x00007ffff7788b3f in app_listener_alloc_and_init >>> (app=app@entry=0x7fffb76f7d98, sep=sep@entry=0x7fffb557fd50, >>> listener=listener@entry=0x7fffb557fd28) at >>> /opt/vpp/src/vnet/session/application.c:196 >>> #3 0x00007ffff7788ed8 in vnet_listen (a=a@entry=0x7fffb557fd50) at >>> /opt/vpp/src/vnet/session/application.c:1005 >>> #4 0x00007ffff7779e08 in session_mq_listen_handler (data=0x1300787e9) at >>> /opt/vpp/src/vnet/session/session_node.c:65 >>> #5 session_mq_listen_handler (data=data@entry=0x1300787e9) at >>> /opt/vpp/src/vnet/session/session_node.c:36 >>> #6 0x00007ffff7bbcdb9 in vl_api_rpc_call_t_handler (mp=0x1300787d0) at >>> /opt/vpp/src/vlibmemory/vlib_api.c:520 >>> #7 0x00007ffff7bc5ead in vl_msg_api_handler_with_vm_node >>> (am=am@entry=0x7ffff7dd2ea0 <api_global_main>, vlib_rp=<optimized out>, >>> the_msg=0x1300787d0, vm=vm@entry=0x7ffff6d7c200 <vlib_global_main>, >>> node=node@entry=0x7fffb553f000, is_private=is_private@entry=0 '\000') >>> at /opt/vpp/src/vlibapi/api_shared.c:609 >>> #8 0x00007ffff7bafee6 in vl_mem_api_handle_rpc (vm=vm@entry=0x7ffff6d7c200 >>> <vlib_global_main>, node=node@entry=0x7fffb553f000) >>> at /opt/vpp/src/vlibmemory/memory_api.c:748 >>> #9 0x00007ffff7bbd5b3 in vl_api_clnt_process (vm=<optimized out>, >>> node=0x7fffb553f000, f=<optimized out>) >>> at /opt/vpp/src/vlibmemory/vlib_api.c:326 >>> #10 0x00007ffff6b1b116 in vlib_process_bootstrap (_a=<optimized out>) at >>> /opt/vpp/src/vlib/main.c:1502 >>> #11 0x00007ffff602fbfc in clib_calljmp () from >>> /opt/vpp/build-root/build-vpp-native/vpp/lib/libvppinfra.so.20.05 >>> #12 0x00007fffb5fa2dd0 in ?? () >>> #13 0x00007ffff6b1e751 in vlib_process_startup (f=0x0, p=0x7fffb553f000, >>> vm=0x7ffff6d7c200 <vlib_global_main>) >>> at /opt/vpp/src/vppinfra/types.h:133 >>> #14 dispatch_process (vm=0x7ffff6d7c200 <vlib_global_main>, >>> p=0x7fffb553f000, last_time_stamp=14118080390223872, f=0x0) >>> at /opt/vpp/src/vlib/main.c:1569 >>> #15 0x00000000004b84e0 in ?? () >>> #16 0x0000000000000000 in ?? () >>> >>> thanks, >>> -Raj >>> >>> On Mon, May 25, 2020 at 2:17 PM Florin Coras <fcoras.li...@gmail.com >>> <mailto:fcoras.li...@gmail.com>> wrote: >>> Hi Raj, >>> >>> Ow, now you’ve hit the untested part of [2]. Could you try this [3]? >>> >>> Regards, >>> Florin >>> >>> [3] https://gerrit.fd.io/r/c/vpp/+/27235 >>> <https://gerrit.fd.io/r/c/vpp/+/27235> >>> >>>> On May 25, 2020, at 10:44 AM, Raj Kumar <raj.gauta...@gmail.com >>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>> >>>> Hi Florin, >>>> >>>> I tried the patches[1] & [2] , but still VCL application is crashing. >>>> However, session is created in VPP. >>>> >>>> vpp# sh session verbose 2 >>>> [0:0][U] 2001:5b0:ffff:700:b883:31f:29e:9880:9978-LISTEN >>>> index 0 flags: CONNECTED, OWNS_PORT, LISTEN >>>> Thread 0: active sessions 1 >>>> Thread 1: no sessions >>>> Thread 2: no sessions >>>> Thread 3: no sessions >>>> Thread 4: no sessions >>>> vpp# sh app server >>>> Connection App Wrk >>>> [0:0][U] 2001:5b0:ffff:700:b883:31f:29e:udp6_rx[shm] 1 >>>> vpp# >>>> >>>> Here are the VCL application traces. Attached is the updated vppcom.c file. >>>> >>>> [root@J3SGISNCCRO01 vcl_test]# VCL_DEBUG=2 gdb >>>> udp6_server_vcl_threaded_udpc >>>> GNU gdb (GDB) Red Hat Enterprise Linux 8.2-6.el8 >>>> Copyright (C) 2018 Free Software Foundation, Inc. >>>> License GPLv3+: GNU GPL version 3 or later >>>> <http://gnu.org/licenses/gpl.html <http://gnu.org/licenses/gpl.html>> >>>> This is free software: you are free to change and redistribute it. >>>> There is NO WARRANTY, to the extent permitted by law. >>>> Type "show copying" and "show warranty" for details. >>>> This GDB was configured as "x86_64-redhat-linux-gnu". >>>> Type "show configuration" for configuration details. >>>> For bug reporting instructions, please see: >>>> <http://www.gnu.org/software/gdb/bugs/ >>>> <http://www.gnu.org/software/gdb/bugs/>>. >>>> Find the GDB manual and other documentation resources online at: >>>> <http://www.gnu.org/software/gdb/documentation/ >>>> <http://www.gnu.org/software/gdb/documentation/>>. >>>> >>>> For help, type "help". >>>> Type "apropos word" to search for commands related to "word"... >>>> Reading symbols from udp6_server_vcl_threaded_udpc...(no debugging symbols >>>> found)...done. >>>> (gdb) r 2001:5b0:ffff:700:b883:31f:29e:9880 9978 >>>> Starting program: /home/super/vcl_test/udp6_server_vcl_threaded_udpc >>>> 2001:5b0:ffff:700:b883:31f:29e:9880 9978 >>>> Missing separate debuginfos, use: yum debuginfo-install >>>> glibc-2.28-72.el8_1.1.x86_64 >>>> [Thread debugging using libthread_db enabled] >>>> Using host libthread_db library "/lib64/libthread_db.so.1". >>>> >>>> server addr - 2001:5b0:ffff:700:b883:31f:29e:9880 >>>> server port 9978, >>>> total port = 1 >>>> VCL<64516>: configured VCL debug level (2) from VCL_DEBUG! >>>> VCL<64516>: allocated VCL heap = 0x7fffe6988010, size 268435456 >>>> (0x10000000) >>>> VCL<64516>: configured rx_fifo_size 4000000 (0x3d0900) >>>> VCL<64516>: configured tx_fifo_size 4000000 (0x3d0900) >>>> VCL<64516>: configured app_scope_local (1) >>>> VCL<64516>: configured app_scope_global (1) >>>> VCL<64516>: configured api-socket-name (/tmp/vpp-api.sock) >>>> VCL<64516>: completed parsing vppcom config! >>>> [New Thread 0x7fffe6987700 (LWP 64520)] >>>> vppcom_connect_to_vpp:502: vcl<64516:0>: app (udp6_rx) is connected to VPP! >>>> vppcom_app_create:1204: vcl<64516:0>: sending session enable >>>> vppcom_app_create:1212: vcl<64516:0>: sending app attach >>>> vppcom_app_create:1221: vcl<64516:0>: app_name 'udp6_rx', my_client_index >>>> 256 (0x100) >>>> [New Thread 0x7fffe6186700 (LWP 64521)] >>>> [New Thread 0x7fffe5985700 (LWP 64522)] >>>> vppcom_connect_to_vpp:502: vcl<64516:1>: app (udp6_rx-wrk-1) is connected >>>> to VPP! >>>> vl_api_app_worker_add_del_reply_t_handler:235: vcl<0:-1>: worker 1 >>>> vpp-worker 1 added >>>> vcl_worker_register_with_vpp:262: vcl<64516:1>: added worker 1 >>>> vppcom_epoll_create:2574: vcl<64516:1>: Created vep_idx 0 >>>> vppcom_session_create:1292: vcl<64516:1>: created session 1 >>>> vppcom_session_bind:1439: vcl<64516:1>: session 1 handle 16777217: binding >>>> to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port 9978, proto >>>> UDP >>>> vppcom_session_listen:1471: vcl<64516:1>: session 16777217: sending vpp >>>> listen request... >>>> >>>> Thread 3 "udp6_server_vcl" received signal SIGSEGV, Segmentation fault. >>>> [Switching to Thread 0x7fffe6186700 (LWP 64521)] >>>> 0x00007ffff7bb0086 in vcl_session_bound_handler (mp=<optimized out>, >>>> wrk=0x7fffe698ad00) at /opt/vpp/src/vcl/vppcom.c:604 >>>> 604 rx_fifo->client_session_index = sid; >>>> (gdb) bt >>>> #0 0x00007ffff7bb0086 in vcl_session_bound_handler (mp=<optimized out>, >>>> wrk=0x7fffe698ad00) at /opt/vpp/src/vcl/vppcom.c:604 >>>> #1 vcl_handle_mq_event (wrk=wrk@entry=0x7fffe698ad00, e=0x214038ec8) at >>>> /opt/vpp/src/vcl/vppcom.c:904 >>>> #2 0x00007ffff7bb0e64 in vppcom_wait_for_session_state_change >>>> (session_index=<optimized out>, state=state@entry=STATE_LISTEN, >>>> wait_for_time=<optimized out>) at /opt/vpp/src/vcl/vppcom.c:966 >>>> #3 0x00007ffff7bb12de in vppcom_session_listen >>>> (listen_sh=listen_sh@entry=16777217, q_len=q_len@entry=10) at >>>> /opt/vpp/src/vcl/vppcom.c:1477 >>>> #4 0x00007ffff7bb1671 in vppcom_session_bind (session_handle=16777217, >>>> ep=0x7fffe6183b30) at /opt/vpp/src/vcl/vppcom.c:1443 >>>> #5 0x0000000000401423 in udpRxThread () >>>> #6 0x00007ffff798c2de in start_thread () from /lib64/libpthread.so.0 >>>> #7 0x00007ffff76bd133 in clone () from /lib64/libc.so.6 >>>> (gdb) >>>> >>>> thanks, >>>> -Raj >>>> >>>> On Tue, May 19, 2020 at 12:31 AM Florin Coras <fcoras.li...@gmail.com >>>> <mailto:fcoras.li...@gmail.com>> wrote: >>>> Hi Raj, >>>> >>>> By the looks of it, something’s not right because in the logs VCL still >>>> reports it’s binding using UDPC. You probably cherry-picked [1] but it >>>> needs [2] as well. More inline. >>>> >>>> [1] https://gerrit.fd.io/r/c/vpp/+/27111 >>>> <https://gerrit.fd.io/r/c/vpp/+/27111> >>>> [2] https://gerrit.fd.io/r/c/vpp/+/27106 >>>> <https://gerrit.fd.io/r/c/vpp/+/27106> >>>> >>>>> On May 18, 2020, at 8:42 PM, Raj Kumar <raj.gauta...@gmail.com >>>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>>> >>>>> >>>>> Hi Florin, >>>>> I tried the path [1] , but still VPP is crashing when application is >>>>> using listen with UDPC. >>>>> >>>>> [1] https://gerrit.fd.io/r/c/vpp/+/27111 >>>>> <https://gerrit.fd.io/r/c/vpp/+/27111> >>>>> >>>>> >>>>> >>>>> On a different topic , I have some questions. Could you please provide >>>>> your inputs - >>>>> >>>>> 1) I am using Mellanox NIC. Any idea how can I enable Tx checksum offload >>>>> ( for udp). Also, how to change the Tx burst mode and Rx burst mode to >>>>> the Vector . >>>>> >>>>> HundredGigabitEthernet12/0/1 3 up HundredGigabitEthernet12/0/1 >>>>> Link speed: 100 Gbps >>>>> Ethernet address b8:83:03:9e:98:81 >>>>> Mellanox ConnectX-4 Family >>>>> carrier up full duplex mtu 9206 >>>>> flags: admin-up pmd maybe-multiseg rx-ip4-cksum >>>>> rx: queues 4 (max 1024), desc 1024 (min 0 max 65535 align 1) >>>>> tx: queues 5 (max 1024), desc 1024 (min 0 max 65535 align 1) >>>>> pci: device 15b3:1013 subsystem 1590:00c8 address 0000:12:00.01 numa 0 >>>>> switch info: name 0000:12:00.1 domain id 1 port id 65535 >>>>> max rx packet len: 65536 >>>>> promiscuous: unicast off all-multicast on >>>>> vlan offload: strip off filter off qinq off >>>>> rx offload avail: vlan-strip ipv4-cksum udp-cksum tcp-cksum >>>>> vlan-filter >>>>> jumbo-frame scatter timestamp keep-crc rss-hash >>>>> rx offload active: ipv4-cksum udp-cksum tcp-cksum jumbo-frame scatter >>>>> tx offload avail: vlan-insert ipv4-cksum udp-cksum tcp-cksum tcp-tso >>>>> outer-ipv4-cksum vxlan-tnl-tso gre-tnl-tso >>>>> geneve-tnl-tso >>>>> multi-segs udp-tnl-tso ip-tnl-tso >>>>> tx offload active: multi-segs >>>>> rss avail: ipv4-frag ipv4-tcp ipv4-udp ipv4-other ipv4 >>>>> ipv6-tcp-ex >>>>> ipv6-udp-ex ipv6-frag ipv6-tcp ipv6-udp ipv6-other >>>>> ipv6-ex ipv6 l4-dst-only l4-src-only l3-dst-only >>>>> l3-src-only >>>>> rss active: ipv4-frag ipv4-tcp ipv4-udp ipv4-other ipv4 >>>>> ipv6-tcp-ex >>>>> ipv6-udp-ex ipv6-frag ipv6-tcp ipv6-udp ipv6-other >>>>> ipv6-ex ipv6 >>>>> tx burst mode: No MPW + MULTI + TSO + INLINE + METADATA >>>>> rx burst mode: Scalar >>>> >>>> FC: Not sure why (might not be supported) but the offloads are not enabled >>>> in dpdk_lib_init for VNET_DPDK_PMD_MLX* nics. You could try replicating >>>> what’s done for the Intel cards and see if that works. Alternatively, you >>>> might want to try the rdma driver, although I don’t know if it supports >>>> csum offloading (cc Ben and Damjan). >>>> >>>>> >>>>> 2) My application needs to send routing header (SRv6) and Destination >>>>> option extension header. On RedHat 8.1 , I was using socket option to add >>>>> routing and destination option extension header. >>>>> With VPP , I can use SRv6 policy to let VPP add the routing header. But, >>>>> I am not sure if there is any option in VPP or HostStack to add the >>>>> destination option header. >>>> >>>> FC: We don’t currently support this. >>>> >>>> Regards, >>>> Florin >>>> >>>>> >>>>> >>>>> Coming back to the original problem, here are the traces- >>>>> >>>>> VCL<39673>: configured VCL debug level (2) from VCL_DEBUG! >>>>> VCL<39673>: using default heapsize 268435456 (0x10000000) >>>>> VCL<39673>: allocated VCL heap = 0x7f6b40221010, size 268435456 >>>>> (0x10000000) >>>>> VCL<39673>: using default configuration. >>>>> vppcom_connect_to_vpp:487: vcl<39673:0>: app (udp6_rx) connecting to VPP >>>>> api (/vpe-api)... >>>>> vppcom_connect_to_vpp:502: vcl<39673:0>: app (udp6_rx) is connected to >>>>> VPP! >>>>> vppcom_app_create:1200: vcl<39673:0>: sending session enable >>>>> vppcom_app_create:1208: vcl<39673:0>: sending app attach >>>>> vppcom_app_create:1217: vcl<39673:0>: app_name 'udp6_rx', my_client_index >>>>> 0 (0x0) >>>>> vppcom_connect_to_vpp:487: vcl<39673:1>: app (udp6_rx-wrk-1) connecting >>>>> to VPP api (/vpe-api)... >>>>> vppcom_connect_to_vpp:502: vcl<39673:1>: app (udp6_rx-wrk-1) is connected >>>>> to VPP! >>>>> vcl_worker_register_with_vpp:262: vcl<39673:1>: added worker 1 >>>>> vl_api_app_worker_add_del_reply_t_handler:235: vcl<94:-1>: worker 1 >>>>> vpp-worker 1 added >>>>> vppcom_epoll_create:2558: vcl<39673:1>: Created vep_idx 0 >>>>> vppcom_session_create:1279: vcl<39673:1>: created session 1 >>>>> vppcom_session_bind:1426: vcl<39673:1>: session 1 handle 16777217: >>>>> binding to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port >>>>> 6677, proto UDPC >>>>> vppcom_session_listen:1458: vcl<39673:1>: session 16777217: sending vpp >>>>> listen request... >>>>> >>>>> #1 0x00007ffff7761259 in session_listen (ls=<optimized out>, >>>>> sep=sep@entry=0x7fffb575ad50) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session_types.h:247 >>>>> #2 0x00007ffff7788b5f in app_listener_alloc_and_init >>>>> (app=app@entry=0x7fffb7273038, sep=sep@entry=0x7fffb575ad50, >>>>> listener=listener@entry=0x7fffb575ad28) at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/application.c:196 >>>>> #3 0x00007ffff7788ef8 in vnet_listen (a=a@entry=0x7fffb575ad50) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/application.c:1005 >>>>> #4 0x00007ffff7779e20 in session_mq_listen_handler (data=0x13007ec01) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session_node.c:64 >>>>> #5 session_mq_listen_handler (data=data@entry=0x13007ec01) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session_node.c:36 >>>>> #6 0x00007ffff7bbcdd9 in vl_api_rpc_call_t_handler (mp=0x13007ebe8) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlibmemory/vlib_api.c:520 >>>>> #7 0x00007ffff7bc5ecd in vl_msg_api_handler_with_vm_node >>>>> (am=am@entry=0x7ffff7dd2ea0 <api_global_main>, vlib_rp=<optimized out>, >>>>> the_msg=0x13007ebe8, vm=vm@entry=0x7ffff6d7c200 <vlib_global_main>, >>>>> node=node@entry=0x7fffb571a000, is_private=is_private@entry=0 '\000') >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlibapi/api_shared.c:609 >>>>> #8 0x00007ffff7baff06 in vl_mem_api_handle_rpc >>>>> (vm=vm@entry=0x7ffff6d7c200 <vlib_global_main>, >>>>> node=node@entry=0x7fffb571a000) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlibmemory/memory_api.c:748 >>>>> #9 0x00007ffff7bbd5d3 in vl_api_clnt_process (vm=<optimized out>, >>>>> node=0x7fffb571a000, f=<optimized out>) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlibmemory/vlib_api.c:326 >>>>> #10 0x00007ffff6b1b136 in vlib_process_bootstrap (_a=<optimized out>) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:1502 >>>>> #11 0x00007ffff602fc0c in clib_calljmp () from /lib64/libvppinfra.so.20.05 >>>>> #12 0x00007fffb5e34dd0 in ?? () >>>>> #13 0x00007ffff6b1e771 in vlib_process_startup (f=0x0, p=0x7fffb571a000, >>>>> vm=0x7ffff6d7c200 <vlib_global_main>) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vppinfra/types.h:133 >>>>> #14 dispatch_process (vm=0x7ffff6d7c200 <vlib_global_main>, >>>>> p=0x7fffb571a000, last_time_stamp=12611933408198086, f=0x0) >>>>> at >>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:1569 >>>>> >>>>> thanks, >>>>> -Raj >>>>> >>>>> >>>>> >>>>> >>>>> On Sat, May 16, 2020 at 8:18 PM Florin Coras <fcoras.li...@gmail.com >>>>> <mailto:fcoras.li...@gmail.com>> wrote: >>>>> Hi Raj, >>>>> >>>>> Inline. >>>>> >>>>>> On May 16, 2020, at 2:30 PM, Raj Kumar <raj.gauta...@gmail.com >>>>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>>>> >>>>>> Hi Florin, >>>>>> >>>>>> I am using VPP 20.05 rc0 . Should I upgrade it ? >>>>> >>>>> FC: Not necessarily, as long as it’s relatively recent, i.e., it includes >>>>> all of the recent udp updates. >>>>> >>>>>> >>>>>> Thanks! for providing the patch, i will try it on Monday. Actually, I am >>>>>> testing in a controlled environment where I can not change the VPP >>>>>> libraries. I will try it on my server. >>>>> >>>>> FC: Sounds good. Let me know how it goes! >>>>> >>>>>> >>>>>> On the UDP connection; yes, the error EINPROGRESS was there because I >>>>>> am using non-blocking connection. Now, I am ignoring this error. >>>>>> Sometime , VPP crashes when I kills my application ( not gracefully) >>>>>> even when there is a single connection . >>>>> >>>>> FC: That might have to do with the app dying such that 1) it does not >>>>> detach from vpp (e.g., sigkill and atexit function is not executed) 2) it >>>>> dies with the message queue mutex held and 3) vpp tries to enqueue more >>>>> events before detecting that it crashed (~30s). >>>>> >>>>>> >>>>>> The good part is that now I am able to move connections on different >>>>>> cores by connecting it on receiving the first packet and then re-binding >>>>>> the socket to listen. >>>>>> Basically, this approach works but I have not tested it thoroughly. >>>>>> However , I am still in favor of using the UDPC connection. >>>>> >>>>> FC: If you have enough logic in your app to emulate a handshake, i.e., >>>>> always have the client send a few bytes and wait for a reply from the >>>>> server before opening a new connection, then this approach is probably >>>>> more flexible from core placement perspective. >>>>> >>>>> The patch tries to emulate the old udpc with udp (udpc in vpp was >>>>> confusing for consumers). You might get away with listening from multiple >>>>> vcl workers on the same udp ip:port pair and have vpp load balance >>>>> accepts between them, but I’ve never tested that. You can do this only >>>>> with udp listeners that have been initialized as connected (so only with >>>>> the patch). >>>>> >>>>>> >>>>>> Btw, in trace logs I see some ssvm_delete related error when re-binding >>>>>> the connection. >>>>> >>>>> FC: I think it’s fine. Going over the interactions step by step to see if >>>>> understand what you’re doing (and hopefully help you understand what vpp >>>>> does underneath). >>>>> >>>>>> >>>>>> vpp# sh session verbose >>>>>> Connection State Rx-f >>>>>> Tx-f >>>>>> [0:0][U] 2001:5b0:ffff:700:b883:31f:29e:9880:6677-LISTEN 0 >>>>>> 0 >>>>>> Thread 0: active sessions 1 >>>>>> >>>>>> Connection State Rx-f >>>>>> Tx-f >>>>>> [1:0][U] 2001:5b0:ffff:700:b883:31f:29e:9880:6677-OPENED 0 >>>>>> 0 >>>>>> Thread 1: active sessions 1 >>>>>> >>>>>> Connection State Rx-f >>>>>> Tx-f >>>>>> [2:0][U] 2001:5b0:ffff:700:b883:31f:29e:9880:6677-OPENED 0 >>>>>> 0 >>>>>> Thread 2: active sessions 1 >>>>>> Thread 3: no sessions >>>>>> Thread 4: no sessions >>>>>> >>>>>> VCL<24434>: configured VCL debug level (2) from VCL_DEBUG! >>>>>> VCL<24434>: using default heapsize 268435456 (0x10000000) >>>>>> VCL<24434>: allocated VCL heap = 0x7f7f18d1b010, size 268435456 >>>>>> (0x10000000) >>>>>> VCL<24434>: using default configuration. >>>>>> vppcom_connect_to_vpp:487: vcl<24434:0>: app (udp6_rx) connecting to VPP >>>>>> api (/vpe-api)... >>>>>> vppcom_connect_to_vpp:502: vcl<24434:0>: app (udp6_rx) is connected to >>>>>> VPP! >>>>>> vppcom_app_create:1200: vcl<24434:0>: sending session enable >>>>>> vppcom_app_create:1208: vcl<24434:0>: sending app attach >>>>>> vppcom_app_create:1217: vcl<24434:0>: app_name 'udp6_rx', >>>>>> my_client_index 0 (0x0) >>>>> >>>>> FC: Added worker 0 >>>>> >>>>>> vppcom_connect_to_vpp:487: vcl<24434:1>: app (udp6_rx-wrk-1) connecting >>>>>> to VPP api (/vpe-api)... >>>>>> vppcom_connect_to_vpp:502: vcl<24434:1>: app (udp6_rx-wrk-1) is >>>>>> connected to VPP! >>>>>> vcl_worker_register_with_vpp:262: vcl<24434:1>: added worker 1 >>>>> >>>>>> vl_api_app_worker_add_del_reply_t_handler:235: vcl<94:-1>: worker 1 >>>>>> vpp-worker 1 added >>>>> >>>>> FC: Adding worker 1 >>>>> >>>>>> vppcom_epoll_create:2558: vcl<24434:1>: Created vep_idx 0 >>>>>> vppcom_session_create:1279: vcl<24434:1>: created session 1 >>>>>> vppcom_session_bind:1426: vcl<24434:1>: session 1 handle 16777217: >>>>>> binding to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port >>>>>> 6677, proto UDP >>>>>> vppcom_session_listen:1458: vcl<24434:1>: session 16777217: sending vpp >>>>>> listen request... >>>>>> vcl_session_bound_handler:607: vcl<24434:1>: session 1 [0x0]: listen >>>>>> succeeded! >>>>>> vppcom_epoll_ctl:2658: vcl<24434:1>: EPOLL_CTL_ADD: vep_sh 16777216, sh >>>>>> 16777217, events 0x1, data 0xffffffff! >>>>> >>>>> FC: Listened on session 1 and added it to epoll session 0 >>>>> >>>>>> udpRxThread started!!! ... rx port = 6677 >>>>>> Waiting for a client to connect on port 6677 ... >>>>>> vppcom_session_connect:1742: vcl<24434:1>: session handle 16777217 >>>>>> (STATE_CLOSED): connecting to peer IPv6 >>>>>> 2001:5b0:ffff:700:b883:31f:29e:9886 port 40300 proto UDP >>>>> >>>>> FC: I guess at this point you got data on the listener so you now try to >>>>> connect it to the peer. >>>>> >>>>>> vppcom_epoll_ctl:2696: vcl<24434:1>: EPOLL_CTL_MOD: vep_sh 16777216, sh >>>>>> 16777217, events 0x2011, data 0x1000001! >>>>> >>>>>> vppcom_session_create:1279: vcl<24434:1>: created session 2 >>>>>> vppcom_session_bind:1426: vcl<24434:1>: session 2 handle 16777218: >>>>>> binding to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port >>>>>> 6677, proto UDP >>>>>> vppcom_session_listen:1458: vcl<24434:1>: session 16777218: sending vpp >>>>>> listen request... >>>>> >>>>> FC: Request to create new listener. >>>>> >>>>>> vcl_session_app_add_segment_handler:855: vcl<24434:1>: mapped new >>>>>> segment '24177-2' size 134217728 >>>>> >>>>> FC: This is probably the connects segment manager segment that was just >>>>> created with the first segment in it. >>>>> >>>>>> vcl_session_connected_handler:505: vcl<24434:1>: session 1 [0x100000000] >>>>>> connected! rx_fifo 0x224051c80, refcnt 1, tx_fifo 0x224051b80, refcnt 1 >>>>> >>>>> FC: Connect for previous listener (session 1) succeeded. >>>>> >>>>>> vcl_session_app_add_segment_handler:855: vcl<24434:1>: mapped new >>>>>> segment '24177-3' size 134217728 >>>>> >>>>> FC: This is the new listener’s first segment manager segment. So session >>>>> 2 has segment 24177-3 associated to it. >>>>> >>>>>> vcl_session_bound_handler:607: vcl<24434:1>: session 2 [0x0]: listen >>>>>> succeeded! >>>>>> vppcom_epoll_ctl:2658: vcl<24434:1>: EPOLL_CTL_ADD: vep_sh 16777216, sh >>>>>> 16777218, events 0x1, data 0xffffffff! >>>>> >>>>> FC: Listen succeeded on session 2 and it was added to the vep group. >>>>> >>>>>> vcl_session_migrated_handler:674: vcl<24434:1>: Migrated 0x100000000 to >>>>>> thread 2 0x200000000 >>>>> >>>>> FC: You got new data on the connected session (session 1) and the session >>>>> was migrated to the rss selected thread in vpp. >>>>> >>>>>> new connecton >>>>>> vppcom_session_connect:1742: vcl<24434:1>: session handle 16777218 >>>>>> (STATE_CLOSED): connecting to peer IPv6 >>>>>> 2001:5b0:ffff:700:b883:31f:29e:9886 port 60725 proto UDP >>>>> >>>>> FC: Connecting session 2 (the latest listener) >>>>> >>>>>> vppcom_epoll_ctl:2696: vcl<24434:1>: EPOLL_CTL_MOD: vep_sh 16777216, sh >>>>>> 16777218, events 0x2011, data 0x1000002! >>>>> >>>>>> vppcom_session_create:1279: vcl<24434:1>: created session 3 >>>>>> vppcom_session_bind:1426: vcl<24434:1>: session 3 handle 16777219: >>>>>> binding to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port >>>>>> 6677, proto UDP >>>>>> vppcom_session_listen:1458: vcl<24434:1>: session 16777219: sending vpp >>>>>> listen request... >>>>> >>>>> FC: Trying to listen on a new session (session 3) >>>>> >>>>>> ssvm_delete_shm:205: unlink segment '24177-3': No such file or directory >>>>>> (errno 2) >>>>> >>>>> FC: This is okay, I think, because vpp already deleted the shm segment >>>>> (so there’s nothing left to delete). >>>>> >>>>> You might want to consider using memfd segments (although it involves a >>>>> bit of configuration like here [1]). >>>>> >>>>> [1] https://wiki.fd.io/view/VPP/HostStack/LDP/iperf >>>>> <https://wiki.fd.io/view/VPP/HostStack/LDP/iperf> >>>>> >>>>>> vcl_segment_detach:467: vcl<24434:1>: detached segment 3 handle 0 >>>>>> vcl_session_app_del_segment_handler:863: vcl<24434:1>: Unmapped segment: >>>>>> 0 >>>>> >>>>> FC: Because session 2 stopped listening, the underlying segment manager >>>>> (all listeners have a segment manager in vpp) was removed. VPP forced vcl >>>>> to unmap the segment as well. >>>>> >>>>>> vcl_session_connected_handler:505: vcl<24434:1>: session 2 [0x100000000] >>>>>> connected! rx_fifo 0x224051a80, refcnt 1, tx_fifo 0x224051980, refcnt 1 >>>>>> vcl_session_app_add_segment_handler:855: vcl<24434:1>: mapped new >>>>>> segment '24177-4' size 134217728 >>>>>> vcl_session_bound_handler:607: vcl<24434:1>: session 3 [0x0]: listen >>>>>> succeeded! >>>>>> vppcom_epoll_ctl:2658: vcl<24434:1>: EPOLL_CTL_ADD: vep_sh 16777216, sh >>>>>> 16777219, events 0x1, data 0xffffffff! >>>>> >>>>> FC: New listener (session 3) got new segment (and segment manager) and it >>>>> was added to epoll group. >>>>> >>>>> Regards, >>>>> Florin >>>>> >>>>>> >>>>>> thanks, >>>>>> -Raj >>>>>> >>>>>> >>>>>> On Sat, May 16, 2020 at 2:23 PM Florin Coras <fcoras.li...@gmail.com >>>>>> <mailto:fcoras.li...@gmail.com>> wrote: >>>>>> Hi Raj, >>>>>> >>>>>> Assuming you are trying to open more than one connected udp session, >>>>>> does this [1] solve the problem (note it's untested)? >>>>>> >>>>>> To reproduce legacy behavior, this allows you to listen on >>>>>> VPPCOM_PROTO_UDPC but that is now converted by vcl into a udp listen >>>>>> that propagates with a “connected” flag to vpp. That should result in a >>>>>> udp listener that behaves like an “old” udpc listener. >>>>>> >>>>>> Regards, >>>>>> Florin >>>>>> >>>>>> [1] https://gerrit.fd.io/r/c/vpp/+/27111 >>>>>> <https://gerrit.fd.io/r/c/vpp/+/27111> >>>>>> >>>>>>> On May 16, 2020, at 10:56 AM, Florin Coras via lists.fd.io >>>>>>> <http://lists.fd.io/> <fcoras.lists=gmail....@lists.fd.io >>>>>>> <mailto:fcoras.lists=gmail....@lists.fd.io>> wrote: >>>>>>> >>>>>>> Hi Raj, >>>>>>> >>>>>>> Are you using master latest/20.05 rc1 or something older? The fact that >>>>>>> you’re getting a -115 (EINPROGRESS) suggests you might’ve marked the >>>>>>> connection as “non-blocking” although you created it as blocking. If >>>>>>> that’s so, the return value is not an error. >>>>>>> >>>>>>> Also, how if vpp crashing? Are you by chance trying to open a lot of >>>>>>> udp connections back to back? >>>>>>> >>>>>>> Regards, >>>>>>> Florin >>>>>>> >>>>>>>> On May 16, 2020, at 10:23 AM, Raj Kumar <raj.gauta...@gmail.com >>>>>>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>>>>>> >>>>>>>> Hi Florin, >>>>>>>> I tried to connect on receiving the first UDP packet . But, it did not >>>>>>>> work. I am getting error -115 in the application and VPP is crashing. >>>>>>>> >>>>>>>> This is something I tried in the code (udp receiver) - >>>>>>>> sockfd = vppcom_session_create(VPPCOM_PROTO_UDP, 0); >>>>>>>> rv_vpp = vppcom_session_bind (sockfd, &endpt); >>>>>>>> if (FD_ISSET(session_idx, &readfds)) >>>>>>>> { >>>>>>>> n = vppcom_session_recvfrom(sockfd, (char *)buffer, MAXLINE, 0, >>>>>>>> &client); >>>>>>>> if(first_pkt) >>>>>>>> rv_vpp = vppcom_session_connect (sockfd, &client); >>>>>>>> //Here getting rv_vpp as -115 >>>>>>>> } >>>>>>>> Please let me know if I am doing something wrong. >>>>>>>> >>>>>>>> Here are the traces - >>>>>>>> >>>>>>>> VCL<16083>: configured VCL debug level (2) from VCL_DEBUG! >>>>>>>> VCL<16083>: using default heapsize 268435456 (0x10000000) >>>>>>>> VCL<16083>: allocated VCL heap = 0x7fd255ed2010, size 268435456 >>>>>>>> (0x10000000) >>>>>>>> VCL<16083>: using default configuration. >>>>>>>> vppcom_connect_to_vpp:487: vcl<16083:0>: app (udp6_rx) connecting to >>>>>>>> VPP api (/vpe-api)... >>>>>>>> vppcom_connect_to_vpp:502: vcl<16083:0>: app (udp6_rx) is connected to >>>>>>>> VPP! >>>>>>>> vppcom_app_create:1200: vcl<16083:0>: sending session enable >>>>>>>> vppcom_app_create:1208: vcl<16083:0>: sending app attach >>>>>>>> vppcom_app_create:1217: vcl<16083:0>: app_name 'udp6_rx', >>>>>>>> my_client_index 0 (0x0) >>>>>>>> >>>>>>>> vppcom_connect_to_vpp:487: vcl<16083:1>: app (udp6_rx-wrk-1) >>>>>>>> connecting to VPP api (/vpe-api)... >>>>>>>> vppcom_connect_to_vpp:502: vcl<16083:1>: app (udp6_rx-wrk-1) is >>>>>>>> connected to VPP! >>>>>>>> vl_api_app_worker_add_del_reply_t_handler:235: vcl<94:-1>: worker 1 >>>>>>>> vpp-worker 1 added >>>>>>>> vcl_worker_register_with_vpp:262: vcl<16083:1>: added worker 1 >>>>>>>> vppcom_session_create:1279: vcl<16083:1>: created session 0 >>>>>>>> vppcom_session_bind:1426: vcl<16083:1>: session 0 handle 16777216: >>>>>>>> binding to local IPv6 address 2001:5b0:ffff:700:b883:31f:29e:9880 port >>>>>>>> 6677, proto UDP >>>>>>>> vppcom_session_listen:1458: vcl<16083:1>: session 16777216: sending >>>>>>>> vpp listen request... >>>>>>>> vcl_session_bound_handler:607: vcl<16083:1>: session 0 [0x0]: listen >>>>>>>> succeeded! >>>>>>>> vppcom_session_connect:1742: vcl<16083:1>: session handle 16777216 >>>>>>>> (STATE_CLOSED): connecting to peer IPv6 >>>>>>>> 2001:5b0:ffff:700:b883:31f:29e:9886 port 51190 proto UDP >>>>>>>> udpRxThread started!!! ... rx port = 6677vppcom_session_connect() >>>>>>>> failed ... -115 >>>>>>>> vcl_session_cleanup:1300: vcl<16083:1>: session 0 [0x0] closing >>>>>>>> vcl_worker_cleanup_cb:190: vcl<94:-1>: cleaned up worker 1 >>>>>>>> vl_client_disconnect:309: peer unresponsive, give up >>>>>>>> >>>>>>>> thanks, >>>>>>>> -Raj >>>>>>>> >>>>>>>> >>>>>>>> On Fri, May 15, 2020 at 8:10 PM Florin Coras <fcoras.li...@gmail.com >>>>>>>> <mailto:fcoras.li...@gmail.com>> wrote: >>>>>>>> Hi Raj, >>>>>>>> >>>>>>>> There are no explicit vcl apis that allow a udp listener to be >>>>>>>> switched to connected mode. We might decide to do this at one point >>>>>>>> through a new bind api (non-posix like) since we do support this for >>>>>>>> builtin applications. >>>>>>>> >>>>>>>> However, you now have the option of connecting a bound session. That >>>>>>>> is, on the first received packet on a udp listener, you can grab the >>>>>>>> peer’s address and connect it. Iperf3 in udp mode, which is part of >>>>>>>> our make test infra, does exactly that. Subsequently, it re-binds the >>>>>>>> port to accept more connections. Would that work for you? >>>>>>>> >>>>>>>> Regards, >>>>>>>> Florin >>>>>>>> >>>>>>>>> On May 15, 2020, at 4:06 PM, Raj Kumar <raj.gauta...@gmail.com >>>>>>>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>>>>>>> >>>>>>>>> Thanks! Florin, >>>>>>>>> >>>>>>>>> OK, I understood that I need to change my application to use UDP >>>>>>>>> socket and then use vppcom_session_connect(). >>>>>>>>> This is fine for the UDP client ( sender) . >>>>>>>>> >>>>>>>>> But ,in UDP Server ( receiver) , I am not sure how to use the >>>>>>>>> vppcom_session_connect(). . >>>>>>>>> I am using vppcom_session_listen() to listen on the connections and >>>>>>>>> then calling vppcom_session_accept() to accept a new connection. >>>>>>>>> >>>>>>>>> With UDPC, I was able to utilize the RSS ( receiver side scaling) >>>>>>>>> feature to move the received connections on the different cores >>>>>>>>> /threads. >>>>>>>>> >>>>>>>>> Just want to confirm if I can achieve the same with UDP. >>>>>>>>> >>>>>>>>> I will change my application and will update you about the result. >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> -Raj >>>>>>>>> >>>>>>>>> >>>>>>>>> On Fri, May 15, 2020 at 5:17 PM Florin Coras <fcoras.li...@gmail.com >>>>>>>>> <mailto:fcoras.li...@gmail.com>> wrote: >>>>>>>>> Hi Raj, >>>>>>>>> >>>>>>>>> We removed udpc transport in vpp. I’ll push a patch that removes it >>>>>>>>> from vcl as well. >>>>>>>>> >>>>>>>>> Calling connect on a udp connection will give you connected semantics >>>>>>>>> now. Let me know if that solves the issue for you. >>>>>>>>> >>>>>>>>> Regards, >>>>>>>>> Florin >>>>>>>>> >>>>>>>>> >>>>>>>>>> On May 15, 2020, at 12:15 PM, Raj Kumar <raj.gauta...@gmail.com >>>>>>>>>> <mailto:raj.gauta...@gmail.com>> wrote: >>>>>>>>>> >>>>>>>>>> Hi, >>>>>>>>>> I am getting segmentation fault in VPP when using VCL >>>>>>>>>> VPPCOM_PROTO_UDPC socket. This issue is observed with both UDP >>>>>>>>>> sender and UDP receiver application. >>>>>>>>>> >>>>>>>>>> However, both UDP sender and receiver works fine with >>>>>>>>>> VPPCOM_PROTO_UDP. >>>>>>>>>> >>>>>>>>>> Here is the stack trace - >>>>>>>>>> >>>>>>>>>> (gdb) bt >>>>>>>>>> #0 0x0000000000000000 in ?? () >>>>>>>>>> #1 0x00007ffff775da59 in session_open_vc (app_wrk_index=1, >>>>>>>>>> rmt=0x7fffb5e34cc0, opaque=0) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session.c:1217 >>>>>>>>>> #2 0x00007ffff7779257 in session_mq_connect_handler >>>>>>>>>> (data=0x7fffb676e7a8) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session_node.c:138 >>>>>>>>>> #3 0x00007ffff7780f48 in session_event_dispatch_ctrl >>>>>>>>>> (elt=0x7fffb643f51c, wrk=0x7fffb650a640) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session.h:262 >>>>>>>>>> #4 session_queue_node_fn (vm=<optimized out>, node=<optimized out>, >>>>>>>>>> frame=<optimized out>) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vnet/session/session_node.c:1409 >>>>>>>>>> #5 0x00007ffff6b214c1 in dispatch_node (last_time_stamp=<optimized >>>>>>>>>> out>, frame=0x0, dispatch_state=VLIB_NODE_STATE_POLLING, >>>>>>>>>> type=VLIB_NODE_TYPE_INPUT, node=0x7fffb5a9a980, >>>>>>>>>> vm=0x7ffff6d7c200 <vlib_global_main>) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:1235 >>>>>>>>>> #6 vlib_main_or_worker_loop (is_main=1, vm=0x7ffff6d7c200 >>>>>>>>>> <vlib_global_main>) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:1815 >>>>>>>>>> #7 vlib_main_loop (vm=0x7ffff6d7c200 <vlib_global_main>) at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:1990 >>>>>>>>>> #8 vlib_main (vm=<optimized out>, vm@entry=0x7ffff6d7c200 >>>>>>>>>> <vlib_global_main>, input=input@entry=0x7fffb5e34fa0) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/main.c:2236 >>>>>>>>>> #9 0x00007ffff6b61756 in thread0 (arg=140737334723072) at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/unix/main.c:658 >>>>>>>>>> #10 0x00007ffff602fc0c in clib_calljmp () from >>>>>>>>>> /lib64/libvppinfra.so.20.05 >>>>>>>>>> #11 0x00007fffffffd1e0 in ?? () >>>>>>>>>> #12 0x00007ffff6b627ed in vlib_unix_main (argc=<optimized out>, >>>>>>>>>> argv=<optimized out>) >>>>>>>>>> at >>>>>>>>>> /usr/src/debug/vpp-20.05-rc0~748_g83d129837.x86_64/src/vlib/unix/main.c:730 >>>>>>>>>> >>>>>>>>>> Earlier , I tested this functionality with VPP 20.01 release with >>>>>>>>>> the following patches and it worked perfectly. >>>>>>>>>> https://gerrit.fd.io/r/c/vpp/+/24332 >>>>>>>>>> <https://gerrit.fd.io/r/c/vpp/+/24332> >>>>>>>>>> https://gerrit.fd.io/r/c/vpp/+/24334 >>>>>>>>>> <https://gerrit.fd.io/r/c/vpp/+/24334> >>>>>>>>>> https://gerrit.fd.io/r/c/vpp/+/24462 >>>>>>>>>> <https://gerrit.fd.io/r/c/vpp/+/24462> >>>>>>>>>> >>>>>>>>>> Thanks, >>>>>>>>>> -Raj >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>>> <vppcom.c> >>> >> >
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