From mboxrd@z Thu Jan 1 00:00:00 1970 To: Benjamin Herrenschmidt Cc: , Subject: Re: "Cache Profiler" ? (was: No cache control on ppc??) References: <877kqmvfmy.fsf@yahoo.com> <20020113193619.14166@smtp.wanadoo.fr> From: Elizabeth Barham Date: 15 Jan 2002 03:17:32 -0600 In-Reply-To: Benjamin Herrenschmidt's message of "Sun, 13 Jan 2002 20:36:19 +0100" Message-ID: <87vge455xv.fsf@liliwhite.open.oasis> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: > First boot once with BootX. Once in linux, grab the value of > /proc/sys/kernel/l2cr. Then, go back to quik, and in your boot > scripts, write back this value. This is the configuration of the > backside L2 cache of the 750. Just a follow-up: It turns out that Linux was using the 750 processor with it's configuration (1,0,0,1 [NewerTech G3L2]) but it was not using the cache at all. In order to grab the parameters of the above-mentioned file in the /proc/sys/kernel directory I had to install Mac OS. Fortunatly we had an extra drive available to install it upon. The configuration that I had been using, though, disabled the cache so I had to find a better setting that was quicker and stable (0,0,1,0 [240 MHz, 478.41 bogomips]). However, the gotcha! with this is that quik (v2.0) throws a fatal error prior to the start-screen ("Choose your kernel"). So, I ended up just keeping MacOS on half of the newly-installed drive and will use BootX to boot into Linux now and in the future; it's not *that* inconvenient and the increase in speed is easily worth it. Thank you all for your help. Kind regards, Elizabeth ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/