linux-kernel - Re: perf list tracepoints problem

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Message-ID: <20150619125104.0f9d6dff@gandalf.local.home>
Date:	Fri, 19 Jun 2015 12:51:04 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: perf list tracepoints problem

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?

-- Steve
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