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Re: 2.6.24-rc2 slab vs slob tbench numbers

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From: Christoph Lameter <clameter@...>
To: Nick Piggin <nickpiggin@...>
Cc: <linux-kernel@...>
Subject: Re: 2.6.24-rc2 slab vs slob tbench numbers
Date: Friday, November 9, 2007 - 1:49 pm

On an 8p 2.6.24-rc2 I see even a 50% regression on tbench SLAB vs. SLUB 
when specifying 8 threads. 

Interestingly nothing changes the performance numbers regardless of 
debugging on or off etc etc. Usually debugging should reduce performance 
but nada. May have something to do with the localhost interface? Something 
is effectively throttling SLUB here.

2.6.23 SLUB	           2159.62 MB/sec
2.6.24-rc2-slab head SLUB  1260.80 MB/sec

2.6.24 SLUB should be faster than 2.6.23 SLUB. Still trying to figure out 
what is going on....

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Messages in current thread:
2.6.24-rc2 slab vs slob tbench numbers, Nick Piggin, (Fri Nov 9, 8:36 am)
Re: 2.6.24-rc2 slab vs slob tbench numbers, Matt Mackall, (Mon Nov 12, 4:13 pm)
Re: 2.6.24-rc2 slab vs slob tbench numbers, Nick Piggin, (Tue Nov 13, 7:44 am)
Re: 2.6.24-rc2 slab vs slob tbench numbers, Christoph Lameter, (Fri Nov 9, 11:15 am)
Re: 2.6.24-rc2 slab vs slob tbench numbers, Christoph Lameter, (Fri Nov 9, 1:49 pm)
2.6.24-rc2: Network commit causes SLUB performance regressio..., Christoph Lameter, (Fri Nov 9, 7:46 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Fri Nov 9, 9:29 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Christoph Lameter, (Mon Nov 12, 3:44 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 7:41 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Tue Nov 13, 9:58 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 1:36 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 2:12 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 2:14 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 2:37 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 6:27 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 7:10 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Herbert Xu, (Wed Nov 14, 7:48 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 7:46 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Christoph Lameter, (Wed Nov 14, 9:03 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Herbert Xu, (Wed Nov 14, 9:11 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Wed Nov 14, 9:47 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Wed Nov 14, 8:21 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 8:27 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 8:02 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., David Miller, (Wed Nov 14, 8:10 am)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Christoph Lameter, (Wed Nov 14, 2:33 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 7:39 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Tue Nov 13, 6:55 pm)
Re: 2.6.24-rc2: Network commit causes SLUB performance regre..., Nick Piggin, (Fri Nov 9, 11:28 pm)