On Mon, 29 Apr 2019 18:39:47 +0200 Mattias Rönnblom <mattias.ronnb...@ericsson.com> wrote:
> Hi. > > Did anyone on the list successfully build DPDK with GCC Link-time > Optimizations (LTO) enabled? I tried and failed a while back, although > the detailed reasons of my failure eludes me for the moment. > > If LTO builds would work "out of the box", DPDK could gradually migrate > from away from having static inline functions in the header files. > > Those interested squeezing out as much performance as possible would > build with LTO (and static linking), and those applications who cared > more about independent upgrades would use dynamic linking and non-LTO > builds. With the extra cost of using DPDK as a shared library > (-fPIC-compiled code, more expensive TLS accesses etc), I'm guessing > this is the case already today. > > Regards, > Mattias I tried (and it worked) in the past. But you have to be consistent about always using the same flags. LTO also really makes compiler a pig and you need multiple Gig of memory.
