linux-kernel - Scheduler and SMP

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Message-ID: <afc5d28f0906131444m11eedd4l4477266135cb869c@mail.gmail.com>
Date:	Sat, 13 Jun 2009 18:44:16 -0300
From:	Bruno Bauer <bgbauer@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Scheduler and SMP

Hello all,

I'm new in kernel development and i be making tests in scheduler for a
study course.
I created a new syscall that set a task for no migrate from cpu (I
added a new flag no_migrate on task_struct).
In my tests, a tar/bzip task with no_migrate flag seted run at 5% more fast.

How do this be explained? Overhead of migration?

My changes are in can_migrate_task and balance_tasks (sched.c) and
copy_process (fork.c).

Thanks,

PS: Sorry, my English is poor.

--
Bruno Germano Bauer
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