Linux cnc raw socket.

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BIBIGUL
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14 Mar 2026 17:16 - 14 Mar 2026 17:26 #344263 by BIBIGUL

Linux cnc raw socket. was created by BIBIGUL

Question. If I use speculative memory access via _mm_prefetch (SSE instruction), does it affect the Linux CNC kernel? I am using this on RAW L2 Zero Copy sockets. I ran it, it seems to work, Axis (Linux CNC) doesn't break. Are there any restrictions on what can be used programmatically when writing drivers for Linux CNC?

Question 2.

int val = 1;
int re = setsockopt(soc, SOL_PACKET, PACKET_QDISC_BYPASS, &val, sizeof(val));

This forces Linux to bypass qdisc (queue discipline). This affects Wireshark; it stops capturing incoming packets, but they are still there. Could this affect Linux CNC? The Linux CNC kernel?

Last edit: 14 Mar 2026 17:26 by BIBIGUL.

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