On 07/23/2017 10:14 AM, Peter C. Wallace wrote:
On Sun, 23 Jul 2017, dave wrote:
Date: Sun, 23 Jul 2017 08:48:19 -0700
From: dave <dengv...@charter.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Subject: [Emc-users] latency excursions
dave@linuxcnc:~$ uname -a
Linux linuxcnc 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian
3.4.55-4linuxcnc i686 i686 i386 GNU/Linux
task: 103857488 cycles, min=0.000049, max=0.474214, avg=0.010993, 86
latency excursions (> 10x expected cycle time of 0.010000s)
task: 25439189 cycles, min=0.000049, max=0.205898, avg=0.010989, 17
latency excursions (> 10x expected cycle time of 0.010000s)
I've done nothing to tune this cpu and as far as I can tell the
motion is ok.
Still it leave me uncomfortable.
What do I need to change to clean this uo?
TIA
Dave
These are not real-time latency issues but rather delays in task
so are not a actual problem unless they are so long that they cause
a disruption the the non-real time tasks linuxCNC is doing (user
interface etc)
These delays will not be reduced by any real time latency tuning of
the system ( and may well be made worse by things that slow the
userland performance like isocpus )
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
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Thanks Peter,
I suppose I should have picked up on the 'task'. I'm going to use age as
an excuse. ;-)
I re-tuned the x axis yesterday for some improvement; following error is
somewhere around 2E-5.
Dave
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