Problem with SMI fix

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14 Aug 2012 11:28 - 14 Aug 2012 11:28 #23157 by ArcEye
Replied by ArcEye on topic Re:Problem with SMI fix
Hi

From your Ubuntu installation open a terminal

Type
sudo wget www.linuxcnc.org/iso/ubuntu-8.04-desktop-emc2-aj13-i386.iso
then when downloaded
sudo cdrecord -v speed=52 fs=16m dev=/dev/sr0 ubuntu-8.04-desktop-emc2-aj13-i386.iso

I have just done it to be sure and the image writes to the 700MB CD without complaint.

(It isn't actually cdrecord that is used but I wont confuse you with that)

regards
Last edit: 14 Aug 2012 11:28 by ArcEye.

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14 Aug 2012 11:40 #23159 by ArcEye
Replied by ArcEye on topic Re:Problem with SMI fix
The problem people usually have with windoze programs is that they tend to live by the mouse, so they drag and drop the file ubuntu-8.04-desktop-emc2-aj13-i386.iso
into the pane that is meant for the files to be included in the .iso

windoze then makes an iso of the iso and it ends up too big!

Somewhere in there there is probably an option to 'burn from iso' which is what you want.

regards

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14 Aug 2012 12:15 #23162 by Tonico
Replied by Tonico on topic Re:Problem with SMI fix
Some progress. It occured to me that I had a dvd/cd drive in the "pile" which I had stopped using because the door would not always open (paper clip solution) but mainly because it stopped working with CD's but used to work with DVD's. Created the 8.04 ISO on a DVD and no problem installing it. Run the latency test at first it still had the spikes. Than I doubled the memory from 1x512 to 2x512 and it seems to be hanging in there after 20 minutes where it would spike in less than 5 min.
2012/08/14 05:09:13
RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns
RTD| -680| -695| 3306| 23104| 28287| 0
RTD| -680| -695| 3372| 17636| 28287| 0
RTD| -684| -695| 3351| 24973| 28287| 0
RTD| -685| -695| 3321| 15689| 28287| 0
RTD| -680| -695| 3316| 26840| 28287| 0
RTD| -681| -695| 3307| 17590| 28287| 0
RTD| -686| -695| 3375| 24792| 28287| 0
RTD| -685| -695| 3343| 12006| 28287| 0
RTD| -686| -695| 3293| 17887| 28287| 0
RTD| -680| -695| 3312| 14592| 28287| 0
RTD| -680| -695| 3378| 14241| 28287| 0
RTD| -680| -695| 3330| 18487| 28287| 0
RTD| -681| -695| 3294| 14982| 28287| 0
RTD| -680| -695| 3306| 12685| 28287| 0
RTD| -686| -695| 3334| 16193| 28287| 0
RTD| -685| -695| 3288| 15050| 28287| 0
RTD| -681| -695| 3326| 24640| 28287| 0
RTD| -682| -695| 3281| 13126| 28287| 0
RTD| -686| -695| 3291| 24490| 28287| 0
RTD| -683| -695| 3384| 16788| 28287| 0
RTD| -683| -695| 3324| 12373| 28287| 0
2012/08/14 05:09:34

I am not throwing any parties yet as the system has no load other than the test. The project for today is figure out how to create a load. Being a real novice at Linux just running this or that is a major project for me reading how to do this and that....
Thanks for help so far

Tony

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14 Aug 2012 18:55 #23201 by BigJohnT
Replied by BigJohnT on topic Re:Problem with SMI fix
Ah the windows burning instructions are in the Getting Started Manual...

linuxcnc.org/docs/html/common/Getting_EMC.html#_burning_the_cd

John

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15 Aug 2012 13:09 #23238 by Tonico
Replied by Tonico on topic Re:Problem with SMI fix
Well it's back.
RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns
RTD| -530| -536| 2210| 14215| 17777| 0
RTD| -532| -536| 2075| 13529| 17777| 0
RTD| -528| -536| 2105| 14424| 17777| 0
RTD| -530| -536| 2097| 15322| 17777| 0
RTD| -530| -536| 2160| 13936| 17777| 0
RTD| -534| -536| 2081| 14566| 17777| 0
RTD| -530| -536| 2144| 13552| 17777| 0
RTD| -529| -536| 2100| 14847| 17777| 0
RTD| -530| -536| 2060| 13835| 17777| 0
RTD| -530| -536| 2089| 14149| 17777| 0
RTD| -530| -536| 2177| 13901| 17777| 0
RTD| -532| -536| 2120| 14750| 17777| 0
RTD| -530| -536| 2154| 12838| 17777| 0
RTD| -530| -536| 2102| 12756| 17777| 0
RTD| -528| -536| 2120| 13540| 17777| 0
RTD| -531| -536| 2084| 14236| 17777| 0
RTD| -525| -536| 2419| 3162332| 3162332| 31
RTD| -534| -536| 2140| 13898| 3162332| 31
RTD| -528| -536| 2148| 13336| 3162332| 31
RTD| -527| -536| 2129| 13734| 3162332| 31
RTD| -529| -536| 2109| 14092| 3162332| 31
2012/08/15 05:51:41
RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns
RTD| -529| -536| 2202| 15205| 3162332| 31
RTD| -525| -536| 2146| 13809| 3162332| 31
RTD| -525| -536| 2188| 13537| 3162332| 31
RTD| -530| -536| 2121| 13281| 3162332| 31
RTD| -530| -536| 2121| 12879| 3162332| 31
RTD| -535| -536| 2106| 13409| 3162332| 31
RTD| -530| -536| 2085| 13125| 3162332| 31
RTD| -533| -536| 2090| 14404| 3162332| 31
RTD| -532| -536| 2089| 14352| 3162332| 31
RTD| -528| -536| 2148| 13988| 3162332| 31
RTD| -534| -536| 2083| 12868| 3162332| 31
RTD| -528| -536| 2130| 13722| 3162332| 31
RTD| -530| -536| 2105| 13661| 3162332| 31
RTD| -531| -536| 2107| 14067| 3162332| 31
RTD| -536| -536| 2110| 13856| 3162332| 31
RTD| -530| -536| 2108| 14272| 3162332| 31
RTD| -530| -536| 2070| 12602| 3162332| 31
RTD| -529| -536| 2103| 13881| 3162332| 31
RTD| -529| -536| 2175| 15564| 3162332| 31
RTD| -530| -536| 2136| 14324| 3162332| 31
RTD| -529| -536| 2111| 14183| 3162332| 31
2012/08/15 05:52:02
RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns
RTD| -530| -536| 2203|

Since I last posted I installed an older ATI AGP (32MB) video card. Turned everything off in Bios that could be turned off including sound.
The spike is very intermittent. I have seen it seconds into the test or anything up to almost 30 minutes.
Any words of wisdom before I convert this Motherboard into a frisbee?
Thanks
Tony

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15 Aug 2012 13:18 #23240 by andypugh
Replied by andypugh on topic Re:Problem with SMI fix
That's not 300k, that's 3 million. 3 milliseconds of your machine doing nothing. That's even worse than I saw on my Mac running LinuxCNC under VirtualPC.

Unless you are enjoying the puzzle, I think it is time to try a different motherboard. The current one is likely to come in useful for something eventually.

Pick something from the "good list"
wiki.linuxcnc.org/cgi-bin/wiki.pl?Latency-Test

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15 Aug 2012 13:38 #23242 by Tonico
Replied by Tonico on topic Re:Problem with SMI fix
I apologize. I did notice that it was actually 3 million and forgot to correct my previous number. Well let me see what I can find
Thank you
Tony

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16 Aug 2012 11:12 #23284 by Tonico
Replied by Tonico on topic Re:Problem with SMI fix
I have a couple or three questions:
I am testing anothe motherboard under 8.04. It is showing a lot of promisse with spikes or over runs at all. This one uses an AMD Athlon XP1800. I have looked at the list of "good" hardware and I notice that many instances it is not mentioned what version of Ubuntu they were tested under. Does this mean that they work under 8.xx and 10.xx ?
For this CPU is there benefits to run under 10.xx?
TIA
Tony

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16 Aug 2012 11:17 #23285 by andypugh
Replied by andypugh on topic Re:Problem with SMI fix
Tonico wrote:

I notice that many instances it is not mentioned what version of Ubuntu they were tested under. Does this mean that they work under 8.xx and 10.xx ?
For this CPU is there benefits to run under 10.xx?

I don't know of any machines that perform better for realtime under 10.04, and quite a few that won't work with it.
The advantages are a better Ubuntu version and multiprocessor support. The later Ubuntu has support for more hardware.

Note that you can run any current LinuxCNC version on either OS.

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16 Aug 2012 11:31 #23286 by ArcEye
Replied by ArcEye on topic Re:Problem with SMI fix
Hi

That list was mostly compiled before 10.04 was released, so most were tested under 8.04

There is no advantage whatsoever in using 10.04 on a board of that vintage, see my FAQ for some of the reasons
www.linuxcnc.org/index.php/english/compo...ew&catid=18&id=19125

10.04 is needed for newer boards, only because the 2.6.24 kernel did not support the chipsets etc they have on them.
Sometimes you can ignore these, if for instance it is the sound that is not supported.
Sometimes however the Live CD for 8.04 will not even run let alone install on newer boards, so there is no choice.

When people do install 10.04, on multi core processors especially, they then have to take steps to revert the board back as if it was a single processor, to get half decent latency.

Higher number is not better where Ubuntu is concerned, best is what runs best on your machine.

regards

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