Hi Damjan, Thank you for your valuable input.
Regards, Feroz On Fri, 14 Feb, 2020, 5:27 PM Damjan Marion, <dmar...@me.com> wrote: > > you need to set it on both sides: > > For VPP: > > $ ccmake build-root/build-vpp-native/vpp > and change PRE_DATA_SIZE to 256 > > or modify following line: > > src/vlib/CMakeLists.txt: > > set(PRE_DATA_SIZE 128 CACHE STRING "Buffer headroom size.”) > > For DPDK you should be able to build custom ext deps package: > > $ sudo dpkg -r vpp-ext-deps > $ make install-ext-deps DPDK_PKTMBUF_HEADROOM=256 > > > > > > On 14 Feb 2020, at 11:44, Mohamed feroz Abdul majeeth < > feroz...@gmail.com> wrote: > > > > Hi folks, > > > > In FD.io vpp the default VLIB_BUFFER_PRE_DATA_SIZE data header room size > is defined as 128. > > And in dpdk also it is defined as 128 as we have encapsulation which > goes beyond 128 bytes > > the packet descriptor block is getting corrupted in the structure > vlib_buffer_t as defined in vlib_buffer.h > > > > how to increase the headroom buffer size to 256 bytes for both dpdk and > vpp? > > > > Thanks, > > Feroz > > > >
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