linux-kernel - Re: perf list tracepoints problem

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Message-ID: <20150619185103.GC31188@kernel.org>
Date:	Fri, 19 Jun 2015 15:51:03 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: perf list tracepoints problem

Em Fri, Jun 19, 2015 at 12:51:04PM -0400, Steven Rostedt escreveu:
> On Fri, 19 Jun 2015 13:19:53 -0300
> Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> 
> > Hi,
> > 
> > 	Have you guys ever saw this:
> > 
> > [root@...f4 ~]# perf list
> > <SKIP>
> >   mem:<addr>[:access]                                [Hardware
> > breakpoint]
> > 
> >   [ Tracepoints not available: Success ]
> > [root@...f4 ~]# uname -r
> > 4.1.0-rc8
> > [root@...f4 ~]# mount | grep tracefs
> > tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)
> > [root@...f4 ~]# mount | grep debugfs
> > debugfs on /sys/kernel/debug type debugfs (rw,relatime,seclabel)
> > [root@...f4 ~]# 
> > 
> > [root@zoo ~]# ls -la /sys/kernel/debug/tracing/events/ | tail
> > drwxr-xr-x.  15 root root 0 Jun 17 10:47 timer
> > drwxr-xr-x.   3 root root 0 Jun 17 10:47 tlb
> > drwxr-xr-x.   3 root root 0 Jun 17 10:47 udp
> > drwxr-xr-x.   4 root root 0 Jun 17 10:47 v4l2
> > drwxr-xr-x.  17 root root 0 Jun 17 10:47 vmscan
> > drwxr-xr-x.   3 root root 0 Jun 17 10:47 vsyscall
> > drwxr-xr-x.   6 root root 0 Jun 17 10:47 workqueue
> > drwxr-xr-x.  31 root root 0 Jun 17 10:47 writeback
> > drwxr-xr-x.  37 root root 0 Jun 17 10:47 xen
> > drwxr-xr-x.  11 root root 0 Jun 17 10:47 xhci-hcd
> > [root@zoo ~]# 
> > 
> > ?
> > 
> > Just a heads up, will continue investigating after some food...
> > 
> 
> Running the older perf that ignores tracepoints not on the debugfs
> system?

Right, I thought I was, but there was a perf-3.10...rpm installed that
was being used instead of my ~/bin/perf new binary, removed the rpm and
it lists the tracepoints now, should've used 'perf --version' before
hitting the send button, sorry about that.

- Arnaldo
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