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From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] md/raid6: delta syndrome for ARM NEON
Date: Thu, 25 Jun 2015 10:30:03 +0200	[thread overview]
Message-ID: <CAKv+Gu9aTCyEQi9g_7oBzOBYay5H_z2mUxK4_D7CQjGs40Lwpw@mail.gmail.com> (raw)
In-Reply-To: <12EF8D94C6F8734FB2FF37B9FBEDD1735FCC7052@EXCHANGE.collogia.de>

On 25 June 2015 at 08:32, Markus Stockhausen <stockhausen@collogia.de> wrote:
>> Von: Ard Biesheuvel [ard.biesheuvel at linaro.org]
>> Gesendet: Mittwoch, 24. Juni 2015 18:43
>> An: linux-arm-kernel at lists.infradead.org; hpa at zytor.com
>> Cc: Ard Biesheuvel; Markus Stockhausen; Neil Brown
>> Betreff: [PATCH] md/raid6: delta syndrome for ARM NEON
>>
>> This implements XOR syndrome calculation using NEON intrinsics.
>> As before, the module can be built for ARM and arm64 from the
>> same source.
>
>> Relative performance on a Cortex-A57 based system:
>>
>>   raid6: int64x1  gen()   905 MB/s
>>   raid6: int64x1  xor()   881 MB/s
>>   raid6: int64x2  gen()  1343 MB/s
>>   raid6: int64x2  xor()  1286 MB/s
>>   raid6: int64x4  gen()  1896 MB/s
>>   raid6: int64x4  xor()  1321 MB/s
>>   raid6: int64x8  gen()  1773 MB/s
>>   raid6: int64x8  xor()  1165 MB/s
>>   raid6: neonx1   gen()  1834 MB/s
>>   raid6: neonx1   xor()  1278 MB/s
>>   raid6: neonx2   gen()  2528 MB/s
>>   raid6: neonx2   xor()  1942 MB/s
>>   raid6: neonx4   gen()  2888 MB/s
>>   raid6: neonx4   xor()  2334 MB/s
>>   raid6: neonx8   gen()  2957 MB/s
>>   raid6: neonx8   xor()  2232 MB/s
>>   raid6: using algorithm neonx8 gen() 2957 MB/s
>>   raid6: .... xor() 2232 MB/s, rmw enabled
>>
>
> Nice to see that the placeholders get filled.
> Did you have a chance to do some real tests?
>

Hello Markus,

I haven't done any real world testing yet. Can you recommend any test
tools or test suites in particular?

Thanks,
Ard.

  reply	other threads:[~2015-06-25  8:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-24 16:43 [PATCH] md/raid6: delta syndrome for ARM NEON Ard Biesheuvel
2015-06-25  6:32 ` AW: " Markus Stockhausen
2015-06-25  8:30   ` Ard Biesheuvel [this message]
2015-06-25  8:50     ` Ard Biesheuvel
2015-06-27 19:54     ` AW: " Markus Stockhausen
2015-06-29  1:32 ` NeilBrown

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