> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of ibetts > Sent: Tuesday, November 17, 2015 13:11 > To: dev at dpdk.org > Cc: Betts, Ian > Subject: [dpdk-dev] [PATCH v3 1/2] examples: add performance thread > sample application > > From: Ian Betts <ian.betts at intel.com> > > This example comprises a layer 3 forwarding derivative intended to > facilitate characterization of performance with different > threading models, specifically:- > > 1. EAL threads running on different physical cores > 2. EAL threads running on the same physical core > 3. Lightweight threads running in an EAL thread > > Purpose and justification > > Since dpdk 2.0 it has been possible to assign multiple EAL threads to > a physical core ( case 2 above ). > Currently no example application has focused on demonstrating the > performance constraints of differing threading models. > > Whilst purpose built applications that fully comprehend the DPDK > single threaded programming model will always yield superior > performance, the desire to preserve ROI in legacy code written for > multithreaded operating environments makes lightweight threads > (case 3 above) worthy of consideration. > > As well as aiding with legacy code reuse, it is anticipated that > lightweight threads will make it possible to scale a multithreaded > application with fine granularity allowing an application to more > easily take advantage of headroom on EAL cores, or conversely occupy > more cores, as dictated by system load. > > To explore performance with lightweight threads a simple cooperative > scheduler subsystem is being included in this example application. > If the expected benefits and use cases prove to be of value, it is > anticipated that this lightweight thread subsystem would become a > library in some future DPDK release. > > Signed-off-by: Ian Betts <ian.betts at intel.com> > ---
Acked-by: Tomasz Kulasek <tomaszx.kulasek at intel.com>
