Re: SLUB performance regression vs SLAB

[Chuck Ebbert]

On 10/04/2007 05:11 PM, David Miller wrote:
> From: Chuck Ebbert <cebbert@xxxxxxxxxx>
> Date: Thu, 04 Oct 2007 17:02:17 -0400
> 
>> How do you simulate reading 100TB of data spread across 3000 disks,
>> selecting 10% of it using some criterion, then sorting and
>> summarizing the result?
> 
> You repeatedly read zeros from a smaller disk into the same amount of
> memory, and sort that as if it were real data instead.

You've just replaced 3000 concurrent streams of data with a single
stream.  That won't test the memory allocator's ability to allocate
memory to many concurrent users very well.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/