linux-kernel - Re: [RFC] LZO de/compression support

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 linux-cve-announce 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]

Message-ID: <4cefeab80705260417h43d4d8a9s3f55b7eb3c19396c@mail.gmail.com>
Date:	Sat, 26 May 2007 16:47:30 +0530
From:	"Nitin Gupta" <nitingupta910@...il.com>
To:	"Pavel Machek" <pavel@....cz>
Cc:	"Richard Purdie" <richard@...nedhand.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Michael-Luke Jones" <mlj28@....ac.uk>,
	linux-kernel@...r.kernel.org, linux-mm-cc@...top.org
Subject: Re: [RFC] LZO de/compression support - take 3

Hi Pavel,

Just did some benchmarking; results below.

On 5/25/07, Pavel Machek <pavel@....cz> wrote:
>
> What is the performance difference between safe and unsafe version?
>

File size: 256K
- Following as tests for original test code - not any kernel port of this.
- Test with each block size repeated 5 times - taken avg. of these 5 runs.
- Same file used for each test.
- Used lzotest utility (included with LZO 2.02) for testing.

Blocksize	Comp*		DU*		DS*		Speed%
4		59.356		211.526		195.260		7.689
8		54.623		202.712		188.369		7.075
16		50.342		196.482		183.988		6.358
32		47.499		189.800		177.455		6.504
64		44.148		178.724		167.201		6.447
128		42.125		170.229		159.257		6.445
256		41.830		155.035		146.115		5.753

* All speeds in MB/sec
Comp = LZO1X-1
DU = Decompress (unsafe)
DS = Decompress (safe)
Speed% = ((DU-DS)/DU)*100

I have yet to see how the kernel ports compare against this original version.

Cheers,
Nitin
-
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/