On Fri, May 4, 2012 at 6:57 AM, David Rientjes <rientjes@xxxxxxxxxx> wrote: > 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. Hm, ok. Where is that overheads from ? Do you have perf output ? I'll need to check what is bad. > 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? Is that common use case ? If he wants to do some resource control, common users will limit usual memory, too. That kinds of too much flexibility makes cgroup complicated, hard-to-use. Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
