From: Hans Reiser <reiser@namesys.com>
To: Jens Axboe <axboe@suse.de>
Cc: Edward Shishkin <edward@namesys.com>,
LKML <linux-kernel@vger.kernel.org>,
Reiserfs mail-list <Reiserfs-List@namesys.com>
Subject: Re: random minor benchmark: Re: Copy 20 tarfiles: ext2 vs (reiser4, unixfile) vs (reiser4,cryptcompress)
Date: Thu, 26 Jan 2006 23:30:57 -0800 [thread overview]
Message-ID: <43D9CC31.9030209@namesys.com> (raw)
In-Reply-To: <20060126153343.GH4311@suse.de>
Jens Axboe wrote:
>On Wed, Jan 25 2006, Hans Reiser wrote:
>
>
>>Notice how CPU speed (and number of cpus) completely determines
>>compression performance.
>>
>>cryptcompress refers to the reiser4 compression plugin, (unix file)
>>refers to the reiser4 non-compressing plugin.
>>
>>Edward Shishkin wrote:
>>
>>
>>
>>>Here are the tests that vs asked for:
>>>Creation (dd) of 20 tarfiles (the original 200M file is in ramfs)
>>>Kernel: 2.6.15-mm4 + current git snapshot of reiser4
>>>
>>>------------------------------------------
>>>
>>>Laputa workstation
>>>Uni Intel Pentium 4 (2.26 GHz) 512M RAM
>>>
>>>ext2:
>>>real 2m, 15s
>>>sys 0m, 14s
>>>
>>>reiser4(unix file)
>>>real 2m, 7s
>>>sys 0m, 23s
>>>
>>>reiser4(cryptcompress, lzo1, 64K)
>>>real 2m, 13s
>>>sys 0m, 11s
>>>
>>>
>
>Just curious - does your crypt plugin reside in user space?
>
>
>
No, kernel. It would have to encrypt+compress with every write to be
in user space, we encrypt+compress only at flush time, and that is a key
optimization (encryption is disabled at the moment due to needing a
little API work, but....) for file sets that are cachable.
prev parent reply other threads:[~2006-01-27 7:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <43D7C6BE.1010804@namesys.com>
2006-01-25 18:59 ` random minor benchmark: Re: Copy 20 tarfiles: ext2 vs (reiser4, unixfile) vs (reiser4,cryptcompress) Hans Reiser
2006-01-26 15:33 ` Jens Axboe
2006-01-26 18:17 ` Edward Shishkin
2006-01-26 18:56 ` Jens Axboe
2006-01-26 20:41 ` Edward Shishkin
2006-01-27 7:43 ` Hans Reiser
2006-01-27 8:09 ` Jens Axboe
2006-01-27 8:06 ` Jens Axboe
2006-01-27 8:14 ` Hans Reiser
2006-01-27 8:21 ` Jens Axboe
2006-01-27 8:41 ` Hans Reiser
2006-01-28 16:53 ` Alexander Zarochentsev
2006-01-27 7:30 ` Hans Reiser [this message]
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