From: Stan Hoeppner <stan@hardwarefreak.com>
To: Jason Newton <nevion@gmail.com>
Cc: xfs@oss.sgi.com
Subject: Re: realtime section bugs still around
Date: Tue, 31 Jul 2012 18:46:25 -0500 [thread overview]
Message-ID: <50186E51.1020107@hardwarefreak.com> (raw)
In-Reply-To: <CAGou9MgMHbTPebFUDXdyLvrUr4T9wo-geNtaPUft9uUmOaju6Q@mail.gmail.com>
On 7/31/2012 6:01 PM, Jason Newton wrote:
> I'm still interested in finding out why streaming a few hundred MB to disk
> has so much over head in comparison to the calculations I do in userspace,
1. md eats a lot of cycles at high data rates
2. ATA overhead
3. IRQ/MSI overhead
4. Etc.
All these small bits add up to more than negligible CPU overhead at high
data rates.
--
Stan
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next prev parent reply other threads:[~2012-07-31 23:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 8:14 realtime section bugs still around Jason Newton
2012-07-27 9:56 ` Stan Hoeppner
2012-07-30 3:03 ` Dave Chinner
[not found] ` <CAGou9MheeBWxajd65szNfDB2L+VVoZ7SypEdUKj7np3L0H8fHA@mail.gmail.com>
2012-07-31 23:01 ` Jason Newton
2012-07-31 23:46 ` Stan Hoeppner [this message]
[not found] ` <CAGou9MhneejOuhX4c8G06c3Zh7dxF-OtZ+=mT-7fho_u1Q3zWw@mail.gmail.com>
2012-08-01 3:55 ` Stan Hoeppner
2012-08-01 5:55 ` Jason Newton
2012-08-02 0:39 ` Stan Hoeppner
2012-08-02 2:38 ` Jason Newton
2012-08-02 10:39 ` Stan Hoeppner
2012-08-03 11:28 ` Stan Hoeppner
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