[dpdk-dev] Performance - linking against DPDK shared vs static libraries

[Stephen Hemminger]

On Wed, 23 Jul 2014 15:58:06 +0000
"Kavanagh, Mark B" <mark.b.kavanagh at intel.com> 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?
> 
> Thanks,
> Mark
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Shared libraries live on different pages and cause more TLB misses.