Re: single aio thread is migrated crazily by scheduler

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To: Ming Lei <ming.lei@xxxxxxxxxx>
Subject: Re: single aio thread is migrated crazily by scheduler
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Thu, 14 Nov 2019 14:14:34 +0100
Cc: linux-block@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Jeff Moyer <jmoyer@xxxxxxxxxx>, Dave Chinner <dchinner@xxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>
In-reply-to: <20191114113153.GB4213@ming.t460p>
References: <20191114113153.GB4213@ming.t460p>
User-agent: Mutt/1.10.1 (2018-07-13)

On Thu, Nov 14, 2019 at 07:31:53PM +0800, Ming Lei wrote:
> Hi Guys,
> 
> It is found that single AIO thread is migrated crazely by scheduler, and
> the migrate period can be < 10ms. Follows the test a):

What does crazy mean? Does it cycle through the L3 mask?

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