Date: Tue, 30 Oct 2012 09:03:10 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Alie Tan <alie@affle.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: BeagleBone questions (was Re: Towards an ARM system-building script) Message-ID: <CAJ-Vmom3oPr_e4BrR6-qV0bwLL9S39RJo-hUxo3XYfni71dn8g@mail.gmail.com> In-Reply-To: <CANuCnH_Dc1XWUmhHmmpOHTGy%2Bjh5AjuVrOzVKE-QA=3zjfTDRA@mail.gmail.com> References: <CANuCnH-Y_Bixer7s5EEU4sJVjRC7s3QQbpJeevdXTpxS2K0OqA@mail.gmail.com> <2E208EEB-B2CF-4AC6-B420-03FB4CF08041@freebsd.org> <1351522908.1123.356.camel@revolution.hippie.lan> <CANuCnH9KcRvp2yKeKg6Tp%2Ba2tZLc7RdhRzQiQ9C2VDcHZwAEEg@mail.gmail.com> <CAJ-VmokQmJbr0P4xp9PHHXC5_q0Fte18atvQu28QX%2B2oZiYmrw@mail.gmail.com> <1351550400.1123.364.camel@revolution.hippie.lan> <CANuCnH_Dc1XWUmhHmmpOHTGy%2Bjh5AjuVrOzVKE-QA=3zjfTDRA@mail.gmail.com>
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On 30 October 2012 03:42, Alie Tan <alie@affle.com> wrote: >> More directly on the OP's point, I wonder if the combo of the system not >> fully booting and too much heat imply that something has gone into a >> tight loop somewhere. > Is there any way to debug/detect this issue? > I cant see any heavy processes from 'top' Well, the real way would be to get PMC up and then see how many cycles are spent in the halt state, versus in the "spin" state inside the idle loop. I just looked at the idle loop and it calls cpu_sleep(0); - the implementations of that _seem_ to enter a CPU wait state, rather than just spinning and chewing all the CPU cycles available. Which CPU type is the RPI? Is it using the armv7 machdep code? Adrian
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