Rockbox mail archiveSubject: Re: PP502x cache bug and ATA DMA test build
Re: 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:
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.
Received on 2012-02-06