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<p>Understandable Leif!</p>
<p><br>
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<p>Out of interest, I thought I would check to see if the response could be changed by modifying the memory clock speed. I changed it to 2400 (0010 on the dip switches). All was looking good as I hit 19 straight boots without failure, then the wheels fell
of the cart and the next 20 boots started looking a lot like the earlier 1600 results.</p>
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<p>Out of interest, is there any dynamic frequency scaling on the memory interfaces that could be causing this problem?</p>
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<p>/Matt</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Leif Lindholm <leif.lindholm@linaro.org><br>
<b>Sent:</b> 09 June 2017 15:32:19<br>
<b>To:</b> Matt Spencer<br>
<b>Cc:</b> macchiato@lists.einval.com; Neta Zur Hershkovits<br>
<b>Subject:</b> Re: [Macchiato] MacchiatoBin GPU progress [#freetimeproject]</font>
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<div class="PlainText">I've ordered the same kind of riser (and think it's waiting for me in<br>
the mail room), so I'll probbaly be testing it myself this weekend.<br>
<br>
If it works, it's never coming out.<br>
If not, I could bring it in once you're back :)<br>
<br>
/<br>
Leif<br>
<br>
On Fri, Jun 09, 2017 at 02:24:05PM +0000, Matt Spencer wrote:<br>
> Sure, it Leif is Ok lending it to me?<br>
> <br>
> <br>
> I won't be back in the office until the week of the 19th June, but Leif - can I borrow your card and see what results I get?<br>
> <br>
> <br>
> /Matt<br>
> <br>
> ________________________________<br>
> From: Ard Biesheuvel <ard.biesheuvel@linaro.org><br>
> Sent: 09 June 2017 15:22:30<br>
> To: Matt Spencer<br>
> Cc: marcin wojtas; Steve McIntyre; macchiato@lists.einval.com; Steve Capper; Leif Lindholm; Wookey; Igal Liberman; Neta Zur Hershkovits<br>
> Subject: Re: [Macchiato] MacchiatoBin GPU progress [#freetimeproject]<br>
> <br>
> On 9 June 2017 at 13:54, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:<br>
> > On 9 June 2017 at 13:52, Matt Spencer <Matt.Spencer@arm.com> wrote:<br>
> >> Ok, ran a reboot test as a background task whilst doing other things...<br>
> >> Getting bored of it now - so here are the results (1=success 0=fail)<br>
> >><br>
> >><br>
> >> Before/After atf/u-boot upgrade - (success/total) success % - cadence<br>
> >><br>
> >><br>
> >> Before - (7/11) 54% - 1010011110001<br>
> >><br>
> >> After - (50/60) 83% -<br>
> >> 111011111111111101010111011011111111011001111111101111111111<br>
> >><br>
> >><br>
> >> I wish the initial sample had more data in it, but at a superficial level,<br>
> >> it looks like things have improved?<br>
> >><br>
> ><br>
> > Oh definitely! Only not to the level that would justify putting 'PCIe<br>
> > support' on the box.<br>
> <br>
> Any chance you could try Leif's x1 graphics card on your box, with and<br>
> without the riser?<br>
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