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From: Francis Moreau <francis.moro@gmail.com>
To: linux-perf-users@vger.kernel.org
Subject: how to get a kernel callgraph starting from a syscall
Date: Thu, 21 Apr 2011 09:46:49 +0200	[thread overview]
Message-ID: <BANLkTikNDX4hYpLjgDnPx8SXFvsv8Syr9g@mail.gmail.com> (raw)

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 ?

If so, would it be possible to point me out the perf command to use ?

Thanks
-- 
Francis

             reply	other threads:[~2011-04-21  7:46 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-21  7:46 Francis Moreau [this message]
2011-04-21 15:23 ` how to get a kernel callgraph starting from a syscall David Ahern
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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