From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <005401c2e0e4$27a1b6b0$020120b0@jockeXP> From: "Joakim Tjernlund" To: Cc: Subject: Re: Improved copy_page() function, about 30% speed up for mpc860! Date: Sun, 2 Mar 2003 18:50:01 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: > > > I can't tell you what revs they were, but all of the MPC860's I could > > > get my hands on here the last time I tried to use dcbz on them were > > > faulty. You may just not be triggering the bug. > > > > hmm, what boards was this? > > I am planning to a larger test here with all our custom mpc860 and mpc862 boards. We have them in > > 100, 80 and 50 MHZ variants. > > > > May be the bug is related to board design? Is there an official errata from Motorla > > regarding this bug? I can't find any. > > > > Anyhow I had a flaw in my testprogram, so you can throw this version of copy_page() away. > > But enabling the use of dcbz in the current version still gives me 30%+ performance increase. > > > > See the embedded list for details. > > > > Jocke I found a link that may have relevance regarding the dcbz problem , can anybody confirm this? http://www.uwsg.iu.edu/hypermail/linux/kernel/0012.0/0529.html Jocke ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/