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Date: Fri, 18 Dec 2009 09:24:29 +0100
From: Wolfgang Grandegger <wg@grandegger.com>
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To: Roman Fietze <roman.fietze@telemotive.de>
Subject: Re: MPC5200B XLB Configuration Issues, FEC RFIFO Events, ATA Crashes
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Roman Fietze wrote:
> Hello Wolfram,
> 
> On Wednesday 09 December 2009 15:57:48 Wolfram Sang wrote:
> 
>> Do you have a way to measure performance penalties?
> 
> As I said, I do.
> 
> And here they are. They won't win a price for the most impartial
> benchmarks ever seen, but thet'll be a good starting point to get a
> feeling what stability might cost.
> 
> The board is using the MPC5200B on a board derived from the old
> lite5200, but with the fixes for the MPC5200B. All tests are run using
> an ST940813AM hard drive with an ext2 and an ext3 of 10GB each,
> default mkfs options. The OS is Debian 4.0. The network connection is
> between a fast Athlon XP2 6400 and the target, using 100MBit/s wiring
> and a 100MBit/s switch.
> 
> The F always stands for fast settings, coherent cache, XLB features
> like snooping, etc. turned on, XLB config 0x0000a006 or 0x0001a006
> (makes no or no big difference).
> 
> The S always stands for slow settings, non coherent cache, XLB
> features like snooping, etc. turned on, XLB config 0x80012006.

What disc access modes, (pio, mwdma or udma) did you use for these tests.

Wolfgang.