Recently we're testing Mellanox 10GbE performance with Ubuntu 17.04 s390x on z13. During the test, we found that interrupt affinity cannot be set like other platforms.
We stopped the 'irqbalance' service first, then echo <hexadecimal bit mask> > /proc/irq/<irq vector>/smp_affinity But get "echo: write error: Input/output error" Is there anything special I don't know on 'Linux on z' regarding this common network performance tuning method? Appreciate if anyone with experience could kindly advise. Thanks, James ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
