Problems with building Linux CNC source

smal
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07 Aug 2021 16:14 #217135 by smal

Replied by smal on topic Problems with building Linux CNC source

How does the processor speed affect general performance of the linuxcnc software? How computing intensive is actually linuxcnc? I assume if we have a loop at 1KHz this is not something which any generation of processors produced in the last 15 years can not handle?

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robertspark
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07 Aug 2021 16:40 #217138 by robertspark

Replied by robertspark on topic Problems with building Linux CNC source

it's not the frequency it's the consistency.... real time means it needs to be ON TIME with little variance

some are good and some not so good as there are too many peripherals or power saving elements (like laptops).... hence all that is disabled as is speedstep , hyperthreading and c-states in the bios

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tommylight
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07 Aug 2021 16:54 #217139 by tommylight

Replied by tommylight on topic Problems with building Linux CNC source

LinuxCNC can run even on some very old hardware, i had it running on a P2 @500MHz, still have it running on a AMD Geode @1000MHz, so if you feel lucky search the web for "coolcnc" and "Debian Dog LinuxCNC".
BTW, dissable hyperthreading, it is enabled on the PC you did the compiling, it is very bad for latency, although you are using a Mesa card so it might not matter at all.

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smal
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07 Aug 2021 19:31 #217155 by smal

Replied by smal on topic Problems with building Linux CNC source

Can you go here a little bit more into detail regarding speedstep -> what this is and where is turned off, the same for hyper-threading and c-states. Is this set in the bios?

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robertspark
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07 Aug 2021 20:40 #217156 by robertspark

Replied by robertspark on topic Problems with building Linux CNC source

yes, they are all bios settings

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vre
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21 Jul 2024 04:53 #305744 by vre

Replied by vre on topic Problems with building Linux CNC source

I try to build linuxcnc master (2.10 pre0)
and build goes to infinite loop with these messages repeated continuously

Use of uninitialized value $line in scalar chomp at /usr/share/perl5/Locale/Po4a/Man.pm line 2344.
Use of uninitialized value $line in concatenation (.) or string at /usr/share/perl5/Locale/Po4a/Man.pm line 2345.
Use of uninitialized value $line in pattern match (m//) at /usr/share/perl5/Locale/Po4a/Man.pm line 2346.
Use of uninitialized value $line in pattern match (m//) at /usr/share/perl5/Locale/Po4a/Man.pm line 2347.

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tommylight
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21 Jul 2024 12:07 #305783 by tommylight

Replied by tommylight on topic Problems with building Linux CNC source

Try compiling without documentation.

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