Re: perf/ftrace: does PERF_EVENT_IOC_SET_FILTER serve any purpose?

[David Ahern]

On 6/9/15 12:30 PM, Vince Weaver wrote:
> Hello
>
> I've been working on documenting the PERF_EVENT_IOC_SET_FILTER ioctl.
>
> I've been trying for the past 2 days and have been unable to get any
> result except EINVAL.
>
> Does anyone ever use this ioctl?  Does anyone know how to use this ioctl?

yes and yes it works.

perf record -e irq:irq_handler_entry --filter irq==28 \
            -e irq:softirq_entry --filter vec==6 -a \
     -- sleep 5
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