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/Docs/porting-guide _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx/message/Y7EMT5B5HYSV3SX533YZZHOOEOMRHNFZ/
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 _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx/message/CWFLIDYED7CYWSTIZ54MU2FYNWCHOS3N/
