On Wednesday, January 07, 2015 03:48:06 PM Tom Easterday did opine
And Gene did reply:
> FWIW, I have a new Wheezy (3.4.9-rtai-686-pae #1 SMP PREEMPT Debian
> 3.4.55-4linuxcnc i686 GNU/Linux) install running, now for 2 days 40
> min, and it is using no swap. Up until a few minutes ago it was
> running a web browser, 1 terminal (with top), and 2 instances of
> glxgears. For the last several minutes I have been doing general
> browsing and poking around using half a dozen terminal instances and
> a few file system manger windows. In all that time, it claims to
> have used no swap at all and 638068 MB ram. This is the ATOM based
> system I posted about a couple days ago, and has only 2GB of ram.
> -Tom
>
> > On Jan 7, 2015, at 7:57 AM, Gene Heskett <[email protected]> wrote:
> >
> > Greetings all;
> >
> > I'd been running the 3 axis sim here for a day or so, using it for
> > code development of a routine to carve the ebody screw cover
> > buttons out of a sheet of ebony. That I have working well I
> > believe. Next is an old straight flute, single flute dull carbide
> > mill converted into a roundover, but I am cold (in the low teens &
> > a good breeze, so wind chill is well below zero) & snow bound (8")
> > ATM, so I've not been out of the house but will probably see about
> > that later today.
> >
> > This morning while touring the machines health with htop after 3
> > days of up time, I found it was about 50 megs into swap on an 8Gb
> > of dram machine. Prior to the wheezy install, I had given up on
> > the default kernel from the previous 1.04.4 LTS install because
> > without the PAE, it only saw about 3Gb of my memory and would be a
> > gigabyte into swap and running like a snail in 3 days of uptime.
> > That was of course a PITA, so several months ago I built a 3.16.0
> > kernel with PAE. It had its bugs, but using swap when it wasn't
> > needed was not one of them. I could run a couple months worth of
> > uptime and swap was never touched.
> >
> > Now this custom kernel from the lcnc wheezy install IS using swap
> > again, while htop says its only useing a gigabyte of main ram. In 3
> > days of uptime? I find that strange as I have not yet configured
> > some of the helper scripts I use, so the process count is just
> > north of 100, while a reboot to the previous disk that I've been
> > using for years, shows about 450 processes loaded. Most are far
> > less than .1% of cpu time.
> >
> > Why the swappiness of this kernel?
> >
> > Linux coyote 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian
> > 3.4.55-4linuxcnc i686 GNU/Linux
Another further observation of the output of htop. Despite the above
kernel's claim that it is PAE equipt, it appears that it is not. Free
agrees with htop, it is not seeing 5/8ths of the memory in this machine.
gene@coyote:/opt$ free
total used free shared buffers cached
Mem: 3106812 2060764 1046048 0 344560 575848
-/+ buffers/cache: 1140356 1966456
Swap: 16772092 77092 16695000
There is 8 Gigs of dram in here, not 3.1. I am not aware of any switches
that can make a PAE kernel cripple itself in this manner. A quick look
at /boot/grub/grub.cfg did not yield any clues.
It is, since I was running the sim.axis again for a couple hours this
afternoon, 75 megabytes into swap less than a day after doing a swapoff -
a, swapon -a.
I downloaded the iso from the linuxcnc.org site, where it also claimed to
be a 32 bit PAE version.
How can I fix this?
Thanks guys.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
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