[dpdk-dev] [PATCH] mk: using initial-exec model for thread local variable

[Thomas Monjalon]

28/04/2018 06:39, Yang, Zhiyong:
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Marvin Liu
> Sent: Saturday, April 28, 2018 5:54 PM
> > 
> > When building share library, thread-local storage model will be changed to
> > global-dynamic. It will cost additional protect for read thread local variable. By
> > now only lcore id is this kind of varaible and not need to dynamic share with
> > other threads. So make TLS model back to initial-exec like static library for
> > better performance.
> > 
> > Signed-off-by: Marvin Liu <yong.liu at intel.com>
> > 
> 
> For vhost-user, 
> If no this pach, vhost user in shared lib perf drops 14.3% than working in static.
> after applying the patch , vhost-user in shared lib can achieve the similar perf as  in static lib.
> 
> Tested-by:  Zhiyong Yang <zhiyong.yang at intel.com>

For the record, I have decided to not try this optimization
in the last weeks of the 18.05 release.
However we could try it in 18.08 by applying the patch early in the cycle.
Is there anyone against this patch?