On 4 July 2013 19:15, Mans Rullgard wrote:
> Chips intended for compute clusters will no doubt be possible to cool
> sufficiently to run at full speed all the time. Designing chips for
> different
> markets involves different sets of tradeoffs, and you're seeing the result
> of that.
>
Yes, thi
On 4 July 2013 18:10, Renato Golin wrote:
> On 4 July 2013 17:13, Siarhei Siamashka wrote:
>>
>> By the way, power consumption is not constant and heavily depends on
>> what the CPU is actually doing. And 100% CPU load in one application
>> does not mean that it would consume the same amount of p
On 4 July 2013 17:34, Siarhei Siamashka wrote:
> For getting reproducible benchmark results, you just need to ensure
> that thermal throttling never kicks in. If the kernel is compiled
> with cpufreq stats enabled, you can compare these stats before/after
> your benchmark to ensure that it spent
On 4 July 2013 17:13, Siarhei Siamashka wrote:
> By the way, power consumption is not constant and heavily depends on
> what the CPU is actually doing. And 100% CPU load in one application
> does not mean that it would consume the same amount of power as 100%
> CPU load in another application.
On Wed, 3 Jul 2013 16:48:51 +0100
Renato Golin wrote:
> But more to the point, I don't want to be scaled down when hot, I want it
> never to get hot in the first place, so I can run at full 1.2GHz, 24 / 7.
> If the scheduler reduces the frequency to decrease the temperature, I'll be
> testing mor
On Wed, 3 Jul 2013 15:59:47 +0100
Mans Rullgard wrote:
> On 3 July 2013 14:13, Renato Golin wrote:
> > Hi Folks,
> >
> > I'm running two buildbots here at home and am getting consistent failures
> > from the Pandas because of overheating. I've set up a monitor that will tell
> > me the current C
On 4 July 2013 12:58, James Tunnicliffe wrote:
> Faster clocks also drink more power - now you are using slower clocks
> those boards will be stressing the PSU less.
That is true. Though, if memory serves me well, I think I was using one
decent power supply and one cheap in the lab, and both Pan
On 4 July 2013 12:27, Renato Golin wrote:
> On 3 July 2013 18:33, Richard Earnshaw wrote:
>>
>> keep lowering the clock limit (.../cpufreq/scaling_max_freq) until you get
>> stability. If you don't, then it isn't a heating problem.
>
>
> It might be a bit too soon, but I just got a few 7h builds
On 3 July 2013 18:33, Richard Earnshaw wrote:
> keep lowering the clock limit (.../cpufreq/scaling_max_freq) until you get
> stability. If you don't, then it isn't a heating problem.
>
It might be a bit too soon, but I just got a few 7h builds out of the
boards at 920MHz without a single glitch
On 4 July 2013 11:29, Mans Rullgard wrote:
> That is not how electricity works.
>
I may not have myself clear, I suppose... We can digress at Connect about
electricity.
cheers,
--renato
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On 4 July 2013 10:08, Renato Golin wrote:
> On 4 July 2013 10:00, Milosz Wasilewski
> wrote:
>>
>> What is the output current of this PSU? I tried running pandaboard
>> with 2.5A PSU and it didn't even start. 3A seems to be the minimum.
>
> These are 5V and on my multimeter I got almost 6V, but i
On 4 July 2013 10:01, Matt Hart wrote:
> I've just had a quick glance at the rack in LAVA Lab with the pandas in
> it, and it seems like we are using the 5V 4A brick style power supplies,
> not the cheap ones.
>
I know, but somewhere in the lab there's a box full of the cheap ones, and
these are
On 4 July 2013 10:00, Milosz Wasilewski wrote:
> What is the output current of this PSU? I tried running pandaboard
> with 2.5A PSU and it didn't even start. 3A seems to be the minimum.
>
These are 5V and on my multimeter I got almost 6V, but it's not just the
voltage, but the constant supply of
I've just had a quick glance at the rack in LAVA Lab with the pandas in it,
and it seems like we are using the 5V 4A brick style power supplies, not
the cheap ones.
Matt
On 4 July 2013 10:00, Milosz Wasilewski wrote:
> On 4 July 2013 09:44, Renato Golin wrote:
> > On 3 July 2013 23:01, Will Ne
On 4 July 2013 09:44, Renato Golin wrote:
> On 3 July 2013 23:01, Will Newton wrote:
>>
>> It may also be worth examining your power supplies and see if they are
>> providing enough current to run the chip this hot reliably. A bench
>> supply could eliminate this possibility conclusively.
>
>
> T
On 3 July 2013 23:01, Will Newton wrote:
> It may also be worth examining your power supplies and see if they are
> providing enough current to run the chip this hot reliably. A bench
> supply could eliminate this possibility conclusively.
>
They're cheap... *very* cheap... They're not the ones
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