Re: [RFC 6/6] perf build: Introduce FEATURES_DUMP make variable

[Jiri Olsa]

On Wed, Jan 13, 2016 at 08:02:24PM +0800, Wangnan (F) wrote:
> 
> 
> On 2016/1/13 18:03, Jiri Olsa wrote:
> >On Wed, Jan 13, 2016 at 05:46:13PM +0800, Wangnan (F) wrote:
> >
> >SNIP
> >
> >>>I'll try to check on that.. does this patch help to improve
> >>>the current speed or do you need to solve this to get substantial
> >>>speedup?
> 
> Finished.
> 
> On a 24 core machine:
> 
> Without this feature, a full build-test takes:
> 
> real    21m16.579s
> user    176m12.989s
> sys    20m54.950s
> 
> With this feature:
> 
> real    16m0.619s
> user    172m53.896s
> sys    19m22.777s
> 
> Speedup: 24.75%.
> 
> So this feature is really useful.

looks great, thanks

jirka