On 23.03.2022 15:00:31, Thomas.Kopp@xxxxxxxxxxxxx wrote: > > For better reproducibility I set the scaling_governor to performance: > > > > | echo performance | sudo tee > > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor > > > > I've no idea why an unpachted v5.17 generates more SPI IRQs. > > > > Can you re-test with performance mode activated, I'm not sure when I > > find time to look into this. > > > Yes, will do. For the record, the difference was really marginal. On > 20k frames I had 39182 vs. 39139 SPI interrupts. I assume in some case the RX processing took so long that there was another RX CAN frame ready in the same IRQ handler run. regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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