From: Arnd Bergmann <arnd@arndb.de>
To: Linas Vepstas <linas@austin.ibm.com>
Subject: Re: [PATCH 0/21]: powerpc/cell spidernet bugfixes, etc.
Date: Wed, 11 Oct 2006 18:02:42 +0200
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On Tuesday 10 October 2006 22:49, Linas Vepstas wrote:
> Andrew, please apply/forward upstream.
> 
> The following set of 21 patches (!) are all aimed at the the 
> spidernet ethernet device driver. The spidernet is an etherenet
> controller built into the Toshiba southbridge for the PowerPC Cell
> processor. (This is the only device in existance that with this
> ethernet hardware in it).
> 
> These patches re-package/re-order/re-cleanup a previous
> set of patches I've previously mailed. Thus, some have
> been previously Acked-by lines, most do not. Most of
> these patches are tiny, and handle problems that cropped
> up during testing. Sorry about there being so many of them.
> 
> The first set of 12 patches fix a large variety of mostly 
> minor bugs. 
> 
> The important patches are 13 through 17: these overcome a 
> debilitating performance problem on transmit (6 megabits
> per second !!) on transmit of patches 500 bytes or larger.
> After applying these, I am able to get the following:
> 
> pkt sz ? speed (100K buffs) ? ? ? speed (4M buffs)
> ------ ? ----------------- ? ? ? ?----------------
> 1500 ? ? 700 Mbits/sec ? ? ? ? ? ?951 Mbits/sec
> 1000 ? ? 658 Mbits/sec ? ? ? ? ? ?770
> 800 ? ? ?600 ? ? ? ? ? ? ? ? ? ? ?648
> 500 ? ? ?500 ? ? ? ? ? ? ? ? ? ? ?500
> 300 ? ? ?372 ? ? ? ? ? ? ? ? ? ? ?372
> 60 ? ? ? ?70 ? ? ? ? ? ? ? ? ? ? ? 70
> 
> Above buf size refers to /proc/sys/net/core/wmem_default

Excellent work! I guess this the best tx performance we've
seen so far on this hardware.

Consider this as an Acked-by: for all the patches, I'll save
the effort of replying to each one of them separately.

Jeff, do you plan on merging these fixes for 2.6.19?

	Arnd <><
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