From: Phil Karn <karn@ka9q.net>
To: Matthias Schniedermeyer <ms@citd.de>
Cc: xfs@oss.sgi.com
Subject: Re: TRIM details
Date: Fri, 07 Jan 2011 06:15:15 -0800 [thread overview]
Message-ID: <4D271FF3.7060303@ka9q.net> (raw)
In-Reply-To: <20110107091720.GA6921@citd.de>
On 1/7/11 1:17 AM, Matthias Schniedermeyer wrote:
> Altough, after thinking about it a little more. Doing a Population count
> in the controller while the data comes in over the wire can't be that
> expensive.
Doesn't even have to be a popcount. Just OR every word into a register
as the data flies by and look to see if the result is 0.
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next prev parent reply other threads:[~2011-01-07 14:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 3:22 TRIM details Phil Karn
2011-01-07 4:35 ` Martin K. Petersen
2011-01-07 9:11 ` Matthias Schniedermeyer
2011-01-07 9:17 ` Matthias Schniedermeyer
2011-01-07 14:15 ` Phil Karn [this message]
2011-01-07 14:13 ` Phil Karn
2011-01-07 16:50 ` Martin K. Petersen
2011-01-07 23:43 ` Phil Karn
2011-01-07 14:21 ` Phil Karn
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