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Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e

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06 Nov 2024 10:51 #313886 by zack
Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e was created by zack
  cnc@cnc:~$ uname -a
Linux cnc 6.8.0-48-generic #48-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 27 14:04:52 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
cnc@cnc:~$ linuxcnc
LINUXCNC - 2.10.0~pre0
cnc@cnc:~$ sudo chrt 99 ping -i .001 -q -c 20000 10.10.10.10
[sudo] password for cnc:    
PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.

--- 10.10.10.10 ping statistics ---
20000 packets transmitted, 20000 received, 0% packet loss, time 20034ms
rtt min/avg/max/mdev = 0.047/0.050/1.014/0.007 ms

cnc@cnc:~$ latency-histogram --nobase --sbinsize 1000







 
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06 Nov 2024 13:54 #313904 by tommylight
Replied by tommylight on topic Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e
Is that the default mode?
I did test with stock Mint22, but the latency was not ok, and i waguely recall mentioning Dynamic somewhere, but i had no isolcpu in use.
Will have another look later, thank you.
BTW i did install 6.10RT and that works, did not boot with 6.11 or 6.12 at all.
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06 Nov 2024 15:53 #313920 by tommylight
Replied by tommylight on topic Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e
Testing this right now on a Lenovo ThinkPad Yoga 370, just added isolcpus=2-3 to boot options, still excursions after a while on batteries.
Stay tuned, testing isolcpu=3-4 now

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06 Nov 2024 15:55 #313921 by zack
Replied by zack on topic Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e
Yes default, but did do updates and got kernel 6.8.0-48.
A few cmd line params incl isolcpus.
been running on old asus i5 2nd gen for a week now.... no errors.
Thread at 800000.
Funny also realtek nic with stock r8169 driver

seems like we heading to a brighter rt future.
Hopefully no more compiling kernels and chopping in drivers etc.

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06 Nov 2024 15:58 - 06 Nov 2024 16:26 #313922 by zack
Replied by zack on topic Mint 22 with stock kernel preempt=dynamic works flawlessly with 7i76e
preempt=full quiet splash kthread_cpus=0-1nosmt=force irqaffinity=0-1 rcu_nocb_poll rcu_nocbs=2-1 lapic=notscdeadline igb.EEE=0 hpet=disable i915.i915_enable_rc6=0 i915.powersave=0 skew_tick=1 intel_idle.max_cstate=1 intel_pstate=disable amd_pstate=disable amd_idle.max_cstate=1 cpufreq.off=1 cpuidle.off=1 idle=poll processor.max_cstate=1 isolcpus=2-3 idle=poll pcie.aspm=0 r8169.eee_enable=0 pcie_aspm=off

Try a few settings abviosly mo realtek goods on yoga
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Last edit: 06 Nov 2024 16:26 by zack.

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