From: David Ahern <dsahern@gmail.com>
To: "Chinnathambi, Muthusamy" <muthusamy.chinnathambi@hp.com>,
"linux-perf-users@vger.kernel.org"
<linux-perf-users@vger.kernel.org>
Subject: Re: perf probe failed to find symbols -
Date: Mon, 15 Dec 2014 20:52:41 -0700 [thread overview]
Message-ID: <548FAC89.4010502@gmail.com> (raw)
In-Reply-To: <050363D101EB63409B222217F4B02E781EC22E9F@G6W2492.americas.hpqcorp.net>
On 12/15/14 8:18 PM, Chinnathambi, Muthusamy wrote:
> Hi,
>
> I wanted try perf probe, but I am getting the following failure.
>
> [root@force perf_tests]# ./perf probe --add sys_read
> Failed to find symbol sys_read in kernel
> Error: Failed to add events.
Works for me:
$ perf probe sys_read
Added new event:
probe:sys_read (on sys_read)
You can now use it in all perf tools, such as:
perf record -e probe:sys_read -aR sleep 1
$ uname -r
3.6.11-4.fc16.x86_64
Also, sys_read already has a tracepoint:
syscalls:sys_enter_read [Tracepoint event]
syscalls:sys_exit_read [Tracepoint event]
David
next prev parent reply other threads:[~2014-12-16 3:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-16 3:18 perf probe failed to find symbols - Chinnathambi, Muthusamy
2014-12-16 3:52 ` David Ahern [this message]
2014-12-16 11:46 ` Arnaldo Carvalho de Melo
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