Hi guys, With the ipi_raise event enabled and filtered with: echo 'reason == "Function call interrupts"' > filter, then the 'cat trace' output below messages: ... insmod-3355 [010] ....1.. 24479.230381: ipi_raise: target_mask=00000000,00000bff (Function call interrupts) ... The above output is triggered by my kernel module where it will smp cross call a remote function from cpu#10 to cpu#11, for the 'target_mask' value, what does the '00000000,00000bff' mean? ~~~~~~~~~~~~~~
Another question is for the filter, I'd like to catch the IPI only happening on cpu#11 *AND* a remote function call, so how to write the 'target_cpus' in the filter expression? I try to write below: echo 'target_cpus == 11 && reason == "Function call interrupts"' > events/ipi/ipi_raise/filter But the 'cat trace' doesn't show anything about cpu#11 IPI info, although both the /proc/interrupts and the smp_processor_id() in the remote function shows there's IPI sent to the cpu#11. Any suggestions? Thank you!
