linux-kernel - Re: howto boost write(2) performance?

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]

Date:	Wed, 10 Oct 2007 08:26:27 +0200
From:	Michael Stiller <ms@...ale.net>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: howto boost write(2) performance?

> 
> The kernel really cannot sustain 125MB/s? I assume the disk
> array is capable?

Yes, the array should be capable, LSI controller U320, SATA disks inside
the array. 

> Where is the bottleneck? Does it keep all disks busy, or are
> the CPUs overloaded?

I'm not sure where the bottleneck is. CPU Load goes up with 
many pdflush processes in D state.

Thanks for the suggestions with sg and O_DIRECT so far, 
will try this.

-Michael

-
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/