lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 10 Nov 2009 13:26:03 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matt Thrailkill <matt.thrailkill@...il.com>
CC:	Pavel Machek <pavel@....cz>, Willy Tarreau <w@....eu>,
	Avi Kivity <avi@...hat.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Matteo Croce <technoboy85@...il.com>,
	Sven-Haegar Koch <haegar@...net.de>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: i686 quirk for AMD Geode

On 11/10/2009 01:21 PM, Matt Thrailkill wrote:
> On Tue, Nov 10, 2009 at 12:54 PM, Pavel Machek <pavel@....cz> wrote:
>> *One* CMOV in the inner loop will make your performance go down 20x.
> 
> This is 20x slower than not running at all, right?

And that's the fundamental win of doing a fullscale emulator: you will
always be able to run, at *some* performance level.

	-hpa

--
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