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From: Janez Pers <janez.pers@fe.uni-lj.si>
To: linux-kernel@vger.kernel.org
Subject: shmat/shmdt penalty
Date: Tue, 15 Apr 2008 18:04:56 +0200	[thread overview]
Message-ID: <4804D228.3090406@fe.uni-lj.si> (raw)

Hi all,

Is there significant penalty for doing shmat/shmdt to a preexisting/
pre-created shared memory segment 60-200 times a second in multiple
processes using a modern (2.6) linux kernel on i386 architecture?

Specifically, do I risk:

* significant slowdown due to context switching (e.g. more than 10%)?
* memory fragmentation (?)
* any other resource exhaustion if such code runs for hours?
* scorn and laughter by people who read my code?

Sorry if this is faq or documented anywhere (I could not find it) - then
the pointer/url to the relevant literature will be enough.

Regards,

Janez.

                 reply	other threads:[~2008-04-15 16:39 UTC|newest]

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