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Rockbox mail archiveSubject: Re: PP502x cache bug and ATA DMA test buildRe: PP502x cache bug and ATA DMA test build
From: Boris Gjenero <boris.gjenero_at_gmail.com>
Date: Sun, 05 Feb 2012 23:36:25 -0500 On 12-02-05 01:01 PM, David Hall wrote: > On 02/05/2012 09:33 AM, Boris Gjenero wrote: >> Could this just be due to all the CPU activity using a lot of power and >> causing a low battery shutdown? >> > > No. My Nano battery is weak (those 6 minutes of passes ate 20% of the > battery) but my Sansa battery is very strong still, and it is/was at > full charge. I don't understand how any of this could repeatably cause a shutdown. I'm also wondering about why the passes would be faster on the Sansa e200. Here's a test plugin which does the same memory access pattern, but doesn't do any cache operations. I wonder if the same shutdown happens with unaltered.mi4 and this plugin: http://dl.dropbox.com/u/16662598/Rockbox/pp502x_cache_test/e200_pp502x_cache_notest.zip If there are any problems then, it's either a bug in the test plugin or e200 instability under high CPU and/or memory load. Best regards, Boris Received on 2012-02-06 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |