Messages in this thread | | | Date | Tue, 09 Jun 2015 13:49:16 -0600 | From | David Ahern <> | Subject | Re: perf/ftrace: does PERF_EVENT_IOC_SET_FILTER serve any purpose? |
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On 6/9/15 1:51 PM, Vince Weaver wrote:
> # perf record -e irq:irq_handler_entry --filter irq==28 -e irq:softirq_entry --filter vec==6 -a -- sleep 5 > invalid or unsupported event: 'irq:irq_handler_entry' > Run 'perf list' for a list of valid events > > perf list doesn't show any tracepoint events, despite having debugfs > mounted and running as root and /sys/kernel/debug/tracing/events/ being > populated.
Do you see this:
# ls /sys/kernel/debug/tracing/events/irq/irq_handler_entry/ enable filter format id trigger
It's used in kernel/irq/handle.c, handle_irq_event_percpu(). As I recall this tracepoint has been around a long time.
David
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