[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 12 Dec 2011 18:20:59 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Pekka Enberg <penberg@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
Sasha Levin <levinsasha928@...il.com>
Subject: Re: [patch 0/3] kvm tool: Serial emulation overhaul
* Pekka Enberg <penberg@...nel.org> wrote:
> On Sun, Dec 11, 2011 at 5:53 PM, Ingo Molnar <mingo@...e.hu> wrote:
> > Okay, but look at it from another angle: the top output i
> > generate is about 300k characters. 5000 msecs to execute it
> > means 16 usecs overhead per character - or about 50k cycles - on
> > a top of the class x86 CPU.
>
> I'm seeing 1.5 usecs per character for this little benchmark:
Interesting - what do you see with the top -b measurement i
posted - can you see similar slowdowns?
Thanks,
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists