At the time we did not manage to get variable frequency working. As variable frequency contributes very little for power management (it's mostly WFI instruction), we decided to lock the frequency.
Thanks, Nuno Goncalves On Wed, May 1, 2019, 13:38 <[email protected]> wrote: > Hi, > > I've also experiencing the same issues, did you get any resolution for the > crashes, lockups? > > Thanks, > > On Monday, July 30, 2018 at 1:45:45 PM UTC+2, Nuno Gonçalves wrote: >> >> Hi, >> >> I've been facing a issue since I enabled CPUFreq on 4.18, and I have >> confirmed it up to today's 4.18-rc7. >> >> I'm using the Orange Pi Zero (H2+), currently with 12 devices under test, >> and they crash randomly in average every 8 hours. >> >> No temperature abnormality, and they actually seem to not crash under >> stress(1) full CPU load, but they do under some "medium" userland load. >> >> This board have a voltage regulator with 1.1 or 1.3V output, so I also >> investigated if it was related. It seems not. Even when enabling only >> 240MHz to 816MHz, always at 1.1V, it crash anyway. >> >> This is the output I get on console: >> >> [ 5339.047465] INFO: rcu_sched detected stalls on CPUs/tasks: >> [ 5339.053764] 1-...!: (0 ticks this GP) idle=028/0/0 >> softirq=29760/29760 fqs=1 >> [ 5339.061215] (detected by 2, t=8407 jiffies, g=45041, c=45040, q=2011) >> [ 5339.075799] rcu_sched kthread starved for 6302 jiffies! g45041 c45040 >> f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 >> [ 5339.086470] RCU grace-period kthread stack dump: >> [ 5358.496609] INFO: rcu_sched detected stalls on CPUs/tasks: >> [ 5358.502901] 1-...!: (0 ticks this GP) idle=5e4/0/0 >> softirq=29760/29760 fqs=0 >> [ 5358.510591] 3-...!: (3 GPs behind) idle=e5c/0/0 softirq=49624/49624 >> fqs=0 >> [ 5358.517771] (detected by 2, t=2102 jiffies, g=45042, c=45041, q=1958) >> [ 5358.539568] rcu_sched kthread starved for 2106 jiffies! g45042 c45041 >> f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 >> [ 5358.550237] RCU grace-period kthread stack dump: >> [ 5416.697273] INFO: rcu_sched detected stalls on CPUs/tasks: >> [ 5416.702781] 1-...!: (0 ticks this GP) idle=2f4/0/0 >> softirq=29760/29760 fqs=1 >> [ 5416.709991] (detected by 2, t=8407 jiffies, g=45042, c=45041, q=2912) >> [ 5416.717537] rcu_sched kthread starved for 6301 jiffies! g45042 c45041 >> f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 >> [ 5416.728043] RCU grace-period kthread stack dump: >> [ 5436.138107] INFO: rcu_sched detected stalls on CPUs/tasks: >> [ 5436.144416] 3-...!: (4 GPs behind) idle=e70/0/0 softirq=49624/49624 >> fqs=0 >> [ 5436.151609] (detected by 2, t=2102 jiffies, g=45043, c=45042, q=2920) >> [ 5436.166152] rcu_sched kthread starved for 2105 jiffies! g45043 c45042 >> f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 >> [ 5436.176827] RCU grace-period kthread stack dump: >> >> I can't get a getty console anymore when this happens. >> >> Looking for suggestions how to pinpoint the issue. >> >> Thanks, >> Nuno >> >> -- > You received this message because you are subscribed to a topic in the > Google Groups "linux-sunxi" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/linux-sunxi/NuWb46cRrzQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
