From: David Ahern <dsahern@gmail.com>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Stephane Eranian <eranian@gmail.com>,
Jiri Olsa <jolsa@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: perf/ftrace: does PERF_EVENT_IOC_SET_FILTER serve any purpose?
Date: Tue, 09 Jun 2015 13:49:16 -0600 [thread overview]
Message-ID: <5577433C.5040702@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1506091547180.9662@vincent-weaver-1.umelst.maine.edu>
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
next prev parent reply other threads:[~2015-06-09 19:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 18:30 perf/ftrace: does PERF_EVENT_IOC_SET_FILTER serve any purpose? Vince Weaver
2015-06-09 19:25 ` David Ahern
2015-06-09 19:51 ` Vince Weaver
2015-06-09 19:49 ` David Ahern [this message]
2015-06-09 20:02 ` Vince Weaver
2015-06-09 19:59 ` David Ahern
2015-06-09 20:18 ` Vince Weaver
2015-06-09 19:55 ` Steven Rostedt
2015-06-09 20:07 ` Vince Weaver
2015-06-09 20:11 ` Arnaldo Carvalho de Melo
2015-06-10 6:51 ` Ingo Molnar
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