Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format

Feng Tang
2012-06-29T01:37:09Z

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