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From: Feng Tang <feng.tang@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <ak@linux.intel.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Ingo Molnar <mingo@elte.hu>, <linux-kernel@vger.kernel.org>,
	<x86@kernel.org>, Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format
Date: Fri, 29 Jun 2012 09:32:53 +0800	[thread overview]
Message-ID: <20120629093253.3e99ca0e@feng-i7> (raw)
In-Reply-To: <1340916697.28750.91.camel@twins>

On Thu, 28 Jun 2012 22:51:37 +0200
Peter Zijlstra <peterz@infradead.org> wrote:

> On Thu, 2012-06-28 at 11:20 -0700, Andi Kleen wrote:
> > > Not without a useful userspace part. 
> > 
> > http://permalink.gmane.org/gmane.linux.kernel/1319962
> > 
> > > Preferably not a script.
> > 
> > You don't need to prefer it.
> 
> +# will be very time consuming (about 10+ minutes for 10000 samples) if the
> 
> Muhahaha... I'll wait for something useful.

Yeah, that number scared me too when I first saw it, as the time will make
the script totally useless. Then after migrating to the RAM based database
file, the database handling time could be cut down to 1 second.

I guess the sqlite itself realize the shortcoming too, it also provide a
native way to use in-memory database by specifying ":memory":
	con = sqlite3.connect(":memory:")

Thanks,
Feng

  reply	other threads:[~2012-06-29  1:37 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-28 16:00 [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format Feng Tang
2012-06-28 16:12 ` Peter Zijlstra
2012-06-28 16:15   ` Stephane Eranian
2012-06-28 16:19     ` Peter Zijlstra
2012-06-28 16:27       ` Stephane Eranian
2012-06-28 16:29         ` Peter Zijlstra
2012-06-28 18:26         ` Andi Kleen
2012-06-28 18:20   ` Andi Kleen
2012-06-28 20:51     ` Peter Zijlstra
2012-06-29  1:32       ` Feng Tang [this message]
2012-06-29  3:35         ` Andi Kleen
2012-06-29 12:49     ` Ingo Molnar
2012-07-03  7:36 ` Michael Ellerman
2012-07-03  9:15   ` Peter Zijlstra
2012-07-04  8:07     ` Michael Ellerman
2012-07-04  9:13       ` Peter Zijlstra
2012-07-05 15:57         ` Stephane Eranian
2012-07-07  7:27           ` Michael Ellerman

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