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From: James Courtier-Dutton <James@superbug.co.uk>
To: Arjan van de Ven <arjan@infradead.org>
Cc: John Richard Moser <nigelenki@comcast.net>, linux-kernel@vger.kernel.org
Subject: Re: Can context switches be faster?
Date: Fri, 13 Oct 2006 12:05:39 +0100	[thread overview]
Message-ID: <452F7303.6070303@superbug.co.uk> (raw)
In-Reply-To: <1160678231.3000.451.camel@laptopd505.fenrus.org>

Arjan van de Ven wrote:
> On Thu, 2006-10-12 at 14:25 -0400, John Richard Moser wrote:
> 
> 
>>   - Does the current code act on these behaviors, or just flush all
>>     cache regardless?
> 
> the cache flushing is a per architecture property. On x86, the cache
> flushing isn't needed; but a TLB flush is. Depending on your hardware
> that can be expensive as well. 
> 

So, that is needed for a full process context switch to another process.
 Is the context switch between threads quicker as it should not need to
flush the TLB?

James


  parent reply	other threads:[~2006-10-13 11:06 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-12 15:44 Can context switches be faster? John Richard Moser
2006-10-12 15:53 ` John Richard Moser
2006-10-12 17:19 ` Russell King
2006-10-12 18:25   ` John Richard Moser
2006-10-12 18:37     ` Arjan van de Ven
2006-10-12 18:56       ` John Richard Moser
2006-10-12 19:02         ` Arjan van de Ven
2006-10-13 11:05       ` James Courtier-Dutton [this message]
2006-10-13 14:51         ` Chase Venters
2006-10-12 18:20 ` Phillip Susi
2006-10-12 18:29   ` John Richard Moser
2006-10-13  2:53     ` Andrew James Wade
2006-10-13  5:29       ` John Richard Moser
2006-10-13 16:56         ` Andrew James Wade
2006-10-13 17:24           ` John Richard Moser
2006-10-12 19:57 ` Chris Friesen
2006-10-12 20:23   ` John Richard Moser
2006-10-12 20:29     ` Arjan van de Ven
2006-10-12 20:36       ` John Richard Moser
2006-10-12 20:35     ` Jeremy Fitzhardinge
2006-10-13 23:32       ` Andreas Mohr
2006-10-13 23:47         ` David Lang
2006-10-14  0:14         ` Jeremy Fitzhardinge
2006-10-14  0:30         ` Alan Cox
2006-10-14  0:14           ` Jeremy Fitzhardinge

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