Messages in this thread | | | Date | Thu, 3 May 2012 14:57:39 -0700 (PDT) | From | David Rientjes <> | Subject | Re: inux-next: Tree for Apr 27 (uml + mm/memcontrol.c) |
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On Thu, 3 May 2012, David Rientjes wrote:
> Is this a claim that memory-intensive workloads will have the exact same > performance with and without memcg enabled?
I've just run specjbb2005 three times on my system both with and without cgroup_disable=memory on the command line and it is consistently 1% faster without memcg. If I add XX:+UseLargePages to the command line to use hugepages it's even larger. So why must I incur this performance degradation if I simply want to control who may mmap hugepages out of the global pool?
The functionality to control this is pretty important if I want to ensure applications aren't able to infringe on the preallocated hugepages of a higher priority application for business goals.
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