From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp6.netcologne.de (smtp6.netcologne.de [194.8.194.26]) by ozlabs.org (Postfix) with ESMTP id 1A30CB7D31 for ; Fri, 5 Feb 2010 06:35:16 +1100 (EST) Date: Thu, 04 Feb 2010 20:35:12 +0100 From: Albrecht =?iso-8859-1?b?RHJl3w==?= Subject: Re: MPC5200B XLB Configuration Issues, FEC RFIFO Events, ATA Crashes To: Roman Fietze In-Reply-To: <201002030716.31280.roman.fietze@telemotive.de> (from roman.fietze@telemotive.de on Wed Feb 3 07:16:31 2010) Message-Id: <1265312112.2256.1@antares> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=PGP-SHA1; boundary="=-hWn7wCkfgYSzxn655QI8" Cc: linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --=-hWn7wCkfgYSzxn655QI8 Content-Type: text/plain; charset=us-ascii; DelSp=Yes; Format=Flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Roman: Am 03.02.10 07:16 schrieb(en) Roman Fietze: > Sorry for the delay ... your mail got stuck in a Notes "spam filter". Never mind. I didn't know yet that I'm *such* a nasty guy... ;-) > Are you using MWDMA2 with the compact flash cards? What is the load on th= e different (DMA) channels? ATA reads or writes? Actually, I forgot that I have to explicitly enable libata dma on the 5200b= , due to the known silicon bugs... I will repeat my tests with the proper = configuration, stay tuned. >> ... a signal processor attached to the localbus, using bestcomm and the = fifo for the bulk transfer >=20 > Are you using an own driver, or are you using Grant's SCLPC+SDMA driver? = BD task? Basically Grant's driver, but with a slightly modified variant of the gen_b= d task. The signal processor is a LE, and I managed to insert the LE/BE co= nversion into the bestcomm task (see also ). Unfortunately, there is no good documentation of the engine; I= would like to also shift crc calculation into bestcomm, which seems to be = possible in principle, but I never got it running. > The best thing is to run very ugly tests with very high load for at least= 24h. Thanks again for this tip! I hope I manage to run a test over the weekend.= Throughput onto the cf cards is not critical for me (so I could live with= pio there), but I'm a little afraid I might also see similar effects with = fec and the signal processor (in particular, the latter *is* critical). Thanks, Albrecht. --=-hWn7wCkfgYSzxn655QI8 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iD8DBQBLayFwn/9unNAn/9ERAv14AJ0VNLnjRnvU20YB+fXWePnStc6iXQCgk7Wk H12CLMkcMtKPg/8vjep2dl8= =4ies -----END PGP SIGNATURE----- --=-hWn7wCkfgYSzxn655QI8--