qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH v5 3/5] iotests: reduce PBKDF iterations when te


From: Max Reitz
Subject: Re: [Qemu-devel] [PATCH v5 3/5] iotests: reduce PBKDF iterations when testing LUKS
Date: Wed, 31 May 2017 17:41:19 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0

On 2017-05-09 19:33, Daniel P. Berrange wrote:
> By default the PBKDF algorithm used with LUKS is tuned
> based on the number of iterations to produce 1 second
> of running time. This makes running the I/O test with
> the LUKS format orders of magnitude slower than with
> qcow2/raw formats.
> 
> When creating LUKS images, set the iteration time to
> a 10ms to reduce the time overhead for LUKS, since
> security does not matter in I/O tests.
> 
> Previously a full 'check -luks' would take
> 
>   $ time ./check -luks
>   Passed all 22 tests
> 
>   real  23m9.988s
>   user  21m46.223s
>   sys   0m22.841s
> 
> Now it takes
> 
>   $ time ./check -luks
>   Passed all 22 tests
> 
>   real  4m39.235s
>   user  3m29.590s
>   sys   0m24.234s
> 
> Still slow compared to qcow2/raw, but much improved
> none the less.
> 
> Reviewed-by: Eric Blake <address@hidden>
> Signed-off-by: Daniel P. Berrange <address@hidden>
> ---
>  tests/qemu-iotests/149           |   3 +
>  tests/qemu-iotests/149.out       | 118 
> +++++++++++++++++++--------------------
>  tests/qemu-iotests/common.filter |   3 +-
>  tests/qemu-iotests/common.rc     |   3 +
>  4 files changed, 67 insertions(+), 60 deletions(-)

Reviewed-by: Max Reitz <address@hidden>

Attachment: signature.asc
Description: OpenPGP digital signature


reply via email to

[Prev in Thread] Current Thread [Next in Thread]