Re: [patch 2/2] fs: buffer: move allocation failure loop into the allocator

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Dec 04, 2013 at 04:33:43PM +0000, Christoph Lameter wrote:
> On Thu, 5 Dec 2013, Joonsoo Kim wrote:
> 
> > Now we have cpu partial slabs facility, so I think that slowpath isn't really
> > slow. And it doesn't much increase the management overhead in the node
> > partial lists, because of cpu partial slabs.
> 
> Well yes that may address some of the issues here.
> 
> > And larger frame may cause more slab_lock contention or cmpxchg contention
> > if there are parallel freeings.
> >
> > But, I don't know which one is better. Is larger frame still better? :)
> 
> Could you run some tests to figure this one out? There are also
> some situations in which we disable the per cpu partial pages though.
> F.e. for low latency/realtime. I posted in kernel synthetic
> benchmarks for slab a while back. That maybe something to start with.

I could try. But my trial would not figure this out, since my machine has
just 4 cores which normally cannot produce heavy contention.
Anyway, could you tell me where I can find your synthetic benchmarks for slab?

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe cgroups" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]     [Monitors]

  Powered by Linux