Florin Coras via lists.fd.io <[email protected]> 于2025年11月30日周日 07:19写道：
> Hi Farooq, > > > On Nov 29, 2025, at 2:50 AM, farooq basha via lists.fd.io <farooq.juturu= > [email protected]> wrote: > > Hi, > > I am planning to use the VPP Host stack for the SSL Proxy solution. > Currently doing a few prototypes to understand internal details of Host > Stack.I have written 2 simple Apps (Server) with POSIX APIs (Please find > the attached files). > > > Sounds good but are you on purpose trying to keep the app compatible with > both linux and vcl/vpp stacks or is there any other reason why it is not > vcl native (directly calls vcl apis)? > > one is with single threaded and another is with Multi threaded. > > Client connects the APP and downloads the test.html file.(curl -v > http://10.10.10.10:8080/test.html). > > With a single threaded app able to download the file multiple times > without any issue. With a Multithreaded app , able to connect only once and > download the file, if I try to connect again > it is stuck at TCP-ESTABLISHED state.Not getting HTTP/1.1 GET payload to > the application. > > vpp# show event-logger > 5 of 131072 events in buffer, logger running > 14991.353354343: lcl: 10.10.10.10:8080 > 14991.353354689: rmt: 192.168.10.1:42272 > 14991.353354769: syn-rx: cidx 1 sidx 0 irs 4130977040 > 14991.353354795: state: syn-rcvd > 14991.353558089: state: established > > > I see you found the session debug infrastructure, but a lighter way to > debug sessions would be to just use “sh session verbose [2]” cli. The > highest level of verbosity will give information about transport and > session state, including fifos state, i.e., bytes sent/received and events > pending. > > For instance, if there’s data in the tx fifo, the has_event flag is set > and data hasn’t been sent by tcp, that might indicate issue in event > propagation. > > > vcl { > heapsize 64M > segment-size 4000000000 > add-segment-size 4000000000 > rx-fifo-size 4000000 > tx-fifo-size 4000000 > max-workers 25 > app-scope-local > app-scope-global > app-socket-api /var/run/vpp/app_ns_sockets/default > use-mq-eventfd > } > > > Looks good. > > > session { > use-app-socket-api enable > evt_qs_memfd_seg > } > > > No need for evt_qs_memfd_seg, it’s default now. > > Am I missing any configuration for Multithreaded App ? > > > Most probable the issue is related to sharing of sessions between threads. > VCL wants to pin sessions to threads, for situations when that doesn’t hold > because of app usage patterns, the vls layer consumed by ldp handles the > detection of threads and the locking. Maybe the fact that main exits > potentially before handle_client does any network interaction for vls to > properly initiate state is the source of the problem. Does it work if main > waits for the worker thread? > > Should note that if you plan to write a multi-threaded app, most probably > you’ll want to add multi-thread-workers to vcl.conf. For vcl native > applications, each thread should call vppcom_worker_register. > > Is there any document where I can find which POSIX calls are supported ? > > > Not explicitly, but you’ll find that we have ci tests that use > nginx/envoy/iperf that should be more complex than the ones lower. > Where to find these test data? > > > VPP Main thread and APPlication are running on 2 different CPUs. > I am using the VPP Latest Version. > > vpp# show threads > ID Name Type LWP Sched Policy (Priority) > lcore Core Socket State > 0 vpp_main 163832 other (0) 2 > 0 0 > 1 vpp_wk_0 workers 163834 other (0) 3 > 0 0 > vpp# show version > vpp v26.02-rc0~246-gc9d32e020 built by root on ubuntu at > 2025-11-29T04:05:56 > > How to enable the debugging logs for VCL? with VPP_VCL_ELOG enabled, did > not see the logs. > > > VCL_DEBUG (=level) environment variable. For elogs, it may be possible to > do "make build VPP_EXTRA_CMAKE_ARGS=-DVPP_VCL_ELOG=ON” > > Hope this helps. > > Regards, > Florin > > > Thanks > Farooq. > <single_thread_app.c><multi_thread_app.c> > > > > > > >
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