On 23/07/14 15:58, Kavanagh, Mark B wrote: > Hi, > > I build a switching application, which links against DPDK shared libraries; > when I run the application, I see throughput of X. I then build the > application again, except this time I link against DPDK shared libraries, > having modified the application's build parameters appropriately. In this > case, I see a performance drop of around .04%, which given the high > throughput of the application is significant. > > Is such performance degradation to be expected when using DPDK shared > libraries, and if not, are there any best-known methods for preventing > performance degradation, assuming that I may be constrained to using shared > libraries going forward?
Do you mean .04% or 4%? I would be more inclined to believe the latter. Shared libraries are inherently slower due to indirection from PIC, and being required to use them seems like a silly constraint in the context of high-performance computing. - antti
