From: Martin Bligh <mbligh@google.com>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Jiaying Zhang <jiayingz@google.com>,
Steven Rostedt <srostedt@redhat.com>,
linux-kernel@vger.kernel.org, Michael Rubin <mrubin@google.com>,
Michael Davidson <md@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC PATCH 3/3] kernel tracing prototype
Date: Fri, 5 Dec 2008 07:37:48 -0800 [thread overview]
Message-ID: <33307c790812050737l6a990685p619b32ac38f6491@mail.gmail.com> (raw)
In-Reply-To: <y0my6yuocth.fsf@ton.toronto.redhat.com>
>> - vanilla 2.6.26 kernel, CONFIG_MARKERS=n
>> Throughput 759.352 MB/sec 4
>> - markers compiled in, tracing disabled
>> Throughput 754.18 MB/sec 4
>
> Is your kernel built with -freorder-blocks? This option dramatically
> reduces the cost of inactive markers/tracepoints.
I'm curious why we wouldn't turn that on by default in the makefile?
At least if CONFIG_MARKERS is on.
next prev parent reply other threads:[~2008-12-05 15:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5df78e1d0812021626y68c7241ahfdba4d37c7840e10@mail.gmail.com>
2008-12-03 0:58 ` [RFC PATCH 3/3] kernel tracing prototype Jiaying Zhang
2008-12-03 4:35 ` Steven Rostedt
2008-12-03 5:30 ` Jiaying Zhang
2008-12-05 8:04 ` Jiaying Zhang
2008-12-05 15:34 ` Frank Ch. Eigler
2008-12-05 15:37 ` Martin Bligh [this message]
2008-12-05 18:36 ` Jiaying Zhang
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