From: Ingo Molnar <mingo@elte.hu>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tracing/function-graph-tracer: don't profile branches on graph tracer
Date: Sun, 22 Mar 2009 18:03:33 +0100 [thread overview]
Message-ID: <20090322170333.GA6936@elte.hu> (raw)
In-Reply-To: <1237741289-14926-1-git-send-email-fweisbec@gmail.com>
* Frederic Weisbecker <fweisbec@gmail.com> wrote:
> Impact: fix slow tracing
>
> The core kernel tracing is protected against soft branch
> profiling, but not the x86 ftrace arch part. Let's fix it.
right now we should simply disable the branch profiler if any
function tracing variant is enabled.
We should probably mark it CONFIG_BROKEN until it's properly
per-cpu-ized.
Ingo
next prev parent reply other threads:[~2009-03-22 17:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-22 17:01 Frederic Weisbecker
2009-03-22 17:03 ` Ingo Molnar [this message]
2009-03-23 18:46 ` Steven Rostedt
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