linux-kernel - Re: [ANNOUNCE] LinSched for v3.3-rc7

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Message-ID: <4F6BF61E.7000009@linux.vnet.ibm.com>
Date:	Fri, 23 Mar 2012 12:03:42 +0800
From:	Michael Wang <wangyun@...ux.vnet.ibm.com>
To:	Paul Turner <pjt@...gle.com>
CC:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Benjamin Segall <bsegall@...gle.com>,
	Ranjit Manomohan <ranjitm@...gle.com>,
	Nikhil Rao <ncrao@...gle.com>, jmc@...unc.edu,
	Dhaval Giani <dhaval.giani@...il.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [ANNOUNCE] LinSched for v3.3-rc7

On 03/15/2012 11:58 AM, Paul Turner wrote:

> Hi All,
> 
> [ Take 2, gmail tried to a non text/plain component into the last email .. ]
> 
> Quick start version:
> 
> Available under linsched-alpha at:
>   git://git.kernel.org/pub/scm/linux/kernel/git/pjt/linsched.git  .linsched

Hi, All

I got confused with the LinSched main loop...
My understanding is:

	while (not time up) {
		
		get all cpus whose next event is the left most
		
		for those cpus {

			simulate hres clock interrupt		
			
			process_all_softirqs() ?			

			if cpu is idle
				enter idle
			else
				check process running time
		}
	}

Wonder why we need to call process_all_softirqs which will process other
cpu's pending soft irq here?

Regards,
Michael Wang

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