Prashant,
The VCL LD_PRELOAD library is experimental and only works with a very
limited set of legacy POSIX sockets applications (and only with single
workers).
The conclusion based on the results of the initial experimentation with
LD_PRELOAD is that it is not a viable mechanism for accelerating legacy
POSIX sockets based applications using the VPP host stack. The current
recommendation is to refactor legacy applications to use the VCL API
directly.
You should also be aware that the VCL infrastructure is in the middle of
being refactored at this time and thus the VCL API may change. I'll let
Florin, who is doing the refactoring, add his input on the VCL API roadmap.
Thanks,
-daw-
On 7/30/2018 7:21 AM, Prashant Upadhyaya wrote:
Hi,
I have compiled VPP and it's running. I have an interface up and can
ping the IP applied there.
Now I am trying to bring up a legacy application TCP server (the one
which uses POSIX calls). So I set the LD_PRELOAD to point to
.../vpp/build-root/install-vpp_debug-native/vpp/lib64/libvcl_ldpreload.so
But the server application now crashes on startup.
Even the ldd command starts crashing.
Can somebody point me to the correct set of steps to be used for
LD_PRELOAD to bring up my legacy tcp server which will then engage the
VPP TCP stack instead of the kernel's
Regards
-Prashant
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