Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench

• To: David Miller <[email protected]>
• Subject: Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench
• From: Nick Piggin <[email protected]>
• Date: Wed, 14 Nov 2007 09:55:03 +1100
• Cc: [email protected], [email protected], [email protected], [email protected]
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On Wednesday 14 November 2007 09:27, Nick Piggin wrote:

> > 2) Try removing NETIF_F_SG in drivers/net/loopback.c's dev->feastures
> >    setting.
>
> Will try that now.

Doesn't help (with vanilla kernel -- Herbert's patch applied).

data_len histogram drops to 0 and goes to len (I guess that's not
surprising).

Performance is pretty similar (ie. not good).

I'll look at allocator patterns next.
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• References:
  • Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench
    • From: Nick Piggin <[email protected]>
  • Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench
    • From: David Miller <[email protected]>
  • Re: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench
    • From: Nick Piggin <[email protected]>

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