From: David Ahern <dsahern@gmail.com>
To: Francis Moreau <francis.moro@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: how to get a kernel callgraph starting from a syscall
Date: Thu, 21 Apr 2011 09:23:31 -0600 [thread overview]
Message-ID: <4DB04BF3.8080206@gmail.com> (raw)
In-Reply-To: <BANLkTikNDX4hYpLjgDnPx8SXFvsv8Syr9g@mail.gmail.com>
On 04/21/11 01:46, Francis Moreau wrote:
> Hello,
>
> Sorry if the question is dumb but I'm a bit lost about this.
>
> I know that ftrace exists but I think that perf can do this too: I
> have a userspace application which is calling a libc C function (read)
> which ends up doing a sys_read.
>
> For the sys_read, I'd like to see what's happening in the kernel by
> displaying the call graph.
>
> Can perf do that ?
Have you tried 'perf record -g'?
David
>
> If so, would it be possible to point me out the perf command to use ?
>
> Thanks
next prev parent reply other threads:[~2011-04-21 15:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-21 7:46 how to get a kernel callgraph starting from a syscall Francis Moreau
2011-04-21 15:23 ` David Ahern [this message]
2011-04-21 18:48 ` Francis Moreau
2011-04-21 19:49 ` David Ahern
2011-04-21 20:07 ` Francis Moreau
2011-04-22 0:47 ` David Ahern
2011-04-22 5:29 ` Francis Moreau
2011-04-22 11:46 ` Francis Moreau
2011-04-23 8:40 ` Stefan Hajnoczi
2011-04-23 9:01 ` Francis Moreau
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