[fedora-arm] Re: F28 on odroid XU4

> -----Original Message-----
> From: arm_ml@rirasoft.de [mailto:arm_ml@rirasoft.de]
> Sent: Friday, August 24, 2018 1:39 PM
> To: Vince Geze <vincegeze@gmail.com>
> Cc: arm@lists.fedoraproject.org
> Subject: Re: [fedora-arm] Re: F28 on odroid XU4
>
> Am 2018-08-24 12:09, schrieb Vince Geze:
> --snip--
> >
> > Well, after countless reboots it seems to be even more simple.
> > - USB3: preloading xhci-plat-hcd, which already is in the initramfs,
> > is sufficient to get proper USB3 operation and the r8152 at full speed
> > as well
> > - CPU HMP: this one I already knew was linked to the
> > CONFIG_BL_SWITCHER. On [1] it is mentioned there are both sysfs and
> > kernel boot options to control this behavior. The sysfs path exists
> > and with lscpu you can see all 8 cores being put online. The kernel
> > boot command however turned out to be incorrect, but after some
> > digging I found you only need "no_bL_switcher" as boot option.
> >
> > Since the board will be used headless, I also enabled the blinking led
> > by preloading ledtrig-heartbeat, but this needs to be included in a
> > /etc/dracut.conf.d/ conf file with 'add_drivers+=" ledtrig-heartbeat
> > "'. The blinking frequency also gives an indication of the load.
> >
> > The final boot line now looks like this:
> > append ro rd.driver.pre=ledtrig-heartbeat,xhci-plat-hcd
> > root=UUID=your_UUID cpuidle.off=1 no_bL_switcher console=tty1
> > console=ttySAC2,115200n8
> >
> > Result:
> > - systematically correct detection of USB3
> > - performance improvement by enabling all cpus
> > - indication whether the system is alive or not
> > - no need for recompiling kernels, only boot time options and an
> > optional dracut inclusion
> >
> > Best regards,
> >
> > Vince
> >
> > [1]
> > https://wiki.linaro.org/projects/big.LITTLE.MP/Big.Little.Switcher/Doc
> > s/porting-guide
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>
> Hello Vince,
>
> I must say thank you !
>
> With your work I can enable all 8 CPUs on my Odroid HC1.
>
> lscpu before:
> [root@odroidh1 ~]# lscpu
> Architektur: armv7l
> Byte-Reihenfolge: Little Endian
> CPU(s): 8
> Liste der Online-CPU(s): 0-3
> Liste der Offline-CPU(s): 4-7
> Thread(s) pro Kern: 1
> Kern(e) pro Socket: 4
> Sockel: 1
>
> lscpu after:
> Architektur: armv7l
> Byte-Reihenfolge: Little Endian
> CPU(s): 8
> Liste der Online-CPU(s): 0-7
> Thread(s) pro Kern: 1
> Kern(e) pro Socket: 4
> Sockel: 2
>
> Greetings
> Andreas

Hi Andreas,

Glad to hear it's working on your side as well. Could you also check the
number at the end of the r8152 line in lsusb -t with the default boot line
without preloads? Is it 480M or 5000M?

Best regards,

Vince
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