Thanks Rod, let me chew on this a bit and see what I can get done.
The pc's I am using are new Liva Z - small form factor pc units but they
are two core only. I have many of them out there on machines an it has
never been a problem until I went up to Bullseye and 2.9.2.
I will report back.
On 2024/02/02 23:34, Rod Webster wrote:
This issue is well known and was introduced to the Debian kernel with
Bullseye (Kernel 5.10).
It is caused by excessive kernel network latency and is nothing to do with
2.9.2
Building a kernel from pristine kernel.org sources mostly solves it.
It has been slowly improving with successive versions of the kernel so I am
surprised that Bookworm made it worse.
We need more info to help much. CPU, number of cores, NIC manufacturers and
model. Older 2 core PCs may not cut it today.
If it's an Intel nic, be sure to add the coalescing settings as advised in
man hm2_eth
My guess is that you probably have realtek NIC's that get the wrong driver
(R8169) installed.
If this is the case, you need to install a dkms driver. (r8168-dkms or
r8125-dkms)
I have a document in Google drive that outlines the way forward (under the
heading optional steps)
https://docs.google.com/document/d/1jeV_4VKzVmOIzbB-ytcgsW2I_PhCm1x7oiw8VcLFdiY/edit?usp=sharing
This has solved the issue for hundreds of users. One or 2 of them were
using a 2 core PC but I have never had anything less than 4 cores
So in summary, I would
1. Install the Linux 2.9.2 ISO
2. Pick up on step 36 of my Document and install my 6.3 kernel. There is an
instructions document if you wish to try your hand at building a later
version (say 6.6)
3. Install the correct Realtek DKMS driver
4. Enjoy using linuxcnc!
Rod Webster
*1300 896 832*
+61 435 765 611
Vehicle Modifications Network
www.vehiclemods.net.au
On Sat, 3 Feb 2024 at 00:14, Peter Wallace <p...@mesanet.com> wrote:
On Fri, 2 Feb 2024, Marius wrote:
Date: Fri, 2 Feb 2024 10:32:54 +0200
From: Marius <mar...@mastercut.co.za>
Reply-To: EMC developers <emc-developers@lists.sourceforge.net>
To: Alec Ari via Emc-developers <Emc-developers@lists.sourceforge.net>
Subject: Re: [Emc-developers] Repositories for buildbot on bullseye
More information regarding this issue
This is the max timings at startup of linuxcnc running Gmoccapy
Parameters:
Owner Type Dir Value Name
56 s32 RW 32713 comp.0.tmax
56 s32 RW 21741 comp.1.tmax
56 s32 RW 21649 comp.2.tmax
56 s32 RW 15801 comp.3.tmax
56 s32 RW 6484 comp.4.tmax
36 s32 RW 0 hm2_7i96s.0.read-request.tmax
36 s32 RW 937642 hm2_7i96s.0.read.tmax
36 s32 RW 79396 hm2_7i96s.0.write.tmax
29 s32 RW 35491 motion-command-handler.tmax
29 s32 RW 80781 motion-controller.tmax
39 s32 RW 22747 pid.b.do-pid-calcs.tmax
39 s32 RW 32665 pid.c.do-pid-calcs.tmax
39 s32 RW 36771 pid.s.do-pid-calcs.tmax
39 s32 RW 35744 pid.x.do-pid-calcs.tmax
39 s32 RW 32242 pid.y.do-pid-calcs.tmax
39 s32 RW 45865 pid.z.do-pid-calcs.tmax
30 s32 RW 1022059 servo-thread.tmax
Then this is the max timings right after the crash
Parameters:
Owner Type Dir Value Name
56 s32 RW 93620 comp.0.tmax
56 s32 RW 21866 comp.1.tmax
56 s32 RW 30257 comp.2.tmax
56 s32 RW 21831 comp.3.tmax
56 s32 RW 22149 comp.4.tmax
36 s32 RW 0 hm2_7i96s.0.read-request.tmax
36 s32 RW 941321 hm2_7i96s.0.read.tmax
36 s32 RW 163732 hm2_7i96s.0.write.tmax
29 s32 RW 52368 motion-command-handler.tmax
29 s32 RW 152143 motion-controller.tmax
39 s32 RW 45604 pid.b.do-pid-calcs.tmax
39 s32 RW 46064 pid.c.do-pid-calcs.tmax
39 s32 RW 93254 pid.s.do-pid-calcs.tmax
39 s32 RW 37166 pid.x.do-pid-calcs.tmax
39 s32 RW 48941 pid.y.do-pid-calcs.tmax
39 s32 RW 45865 pid.z.do-pid-calcs.tmax
30 s32 RW 1031395 servo-thread.tmax
Take note of the motion controller and the hm2_7i96s.0.read.tmax threads.
What is the CPU clock speed?
Peter Wallace
Mesa Electronics
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