linux-kernel - Re: [PATCH 4/4] Simple correctness and speed test for CRCT10DIF hash

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Message-ID: <516EE2D7.5040301@iki.fi>
Date:	Wed, 17 Apr 2013 20:58:47 +0300
From:	Jussi Kivilinna <jussi.kivilinna@....fi>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
CC:	Herbert Xu <herbert@...dor.apana.org.au>,
	"H. Peter Anvin" <hpa@...or.com>,
	"David S. Miller" <davem@...emloft.net>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Jim Kukunas <james.t.kukunas@...ux.intel.com>,
	Keith Busch <keith.busch@...el.com>,
	Erdinc Ozturk <erdinc.ozturk@...el.com>,
	Vinodh Gopal <vinodh.gopal@...el.com>,
	James Guilford <james.guilford@...el.com>,
	Wajdi Feghali <wajdi.k.feghali@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH 4/4] Simple correctness and speed test for CRCT10DIF hash

On 16.04.2013 19:20, Tim Chen wrote:
> These are simple tests to do sanity check of CRC T10 DIF hash.  The
> correctness of the transform can be checked with the command
> 	modprobe tcrypt mode=47
> The speed of the transform can be evaluated with the command
> 	modprobe tcrypt mode=320
> 
> Set the cpu frequency to constant and turn turbo off when running the
> speed test so the frequency governor will not tweak the frequency and
> affects the measurements.
> 
> Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>
> Tested-by: Keith Busch <keith.busch@...el.com>
<snip>
>  
> +#define CRCT10DIF_TEST_VECTORS	2
> +static struct hash_testvec crct10dif_tv_template[] = {
> +	{
> +		.plaintext = "abc",
> +		.psize  = 3,
> +#ifdef __LITTLE_ENDIAN
> +		.digest = "\x3b\x44",
> +#else
> +		.digest = "\x44\x3b",
> +#endif
> +	}, {
> +		.plaintext =
> +		"abcddddddddddddddddddddddddddddddddddddddddddddddddddddd",
> +		.psize  = 56,
> +#ifdef __LITTLE_ENDIAN
> +		.digest = "\xe3\x9c",
> +#else
> +		.digest = "\x9c\xe3",
> +#endif
> +		.np     = 2,
> +		.tap    = { 28, 28 }
> +	}
> +};
> +

Are these large enough to test all code paths in the PCLMULQDQ implementation?

-Jussi

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