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From: Per Oberg <pero@wolfram.com>
To: xenomai@lists.linux.dev
Subject: Controlling cpu for interrupts
Date: Mon, 9 Jun 2025 06:27:39 -0500 (CDT)	[thread overview]
Message-ID: <1461577086.484867.1749468459969.JavaMail.zimbra@wolfram.com> (raw)

Hi 

I have a setup with
- Xenomai 3.1 
- Linux 4.14 ish
- RT Net e1000e + igb
- Peak PCAN

When I look closely on the rt-threads I can see that the IRQ from the CAN seems to be coming in on certain cores, but now always the same. 

Here is an example of my ../xenomai/irq file:

  IRQ         CPU0        CPU1        CPU2        CPU3
   18:           0           0           0   130419960         pcan pcan pcan pcan pcan pcan
   19:    88638780           0           0           0         pcan pcan pcan pcan
  127:        3215           0           0           0         rteth0-TxRx-0

Thus, for this case it seems like IRQ19 is handled by CPU0 while IRQ18 is handled on CPU3

What is the heuristics, if any, used for decing this ?

Thanks
Per Öberg 

             reply	other threads:[~2025-06-09 11:54 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-09 11:27 Per Oberg [this message]
2025-06-10 14:09 ` Controlling cpu for interrupts Jan Kiszka
2025-06-10 16:00   ` Per Oberg

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