Re: [RFC,PATCH] RCUify single-thread case of clock_gettime()
From: Ingo Molnar (mingo_at_elte.hu)
Date: 10/31/05
- Previous message: Ingo Molnar: "[patch] preempt-trace.patch"
- In reply to: Paul E. McKenney: "[RFC,PATCH] RCUify single-thread case of clock_gettime()"
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Date: Mon, 31 Oct 2005 22:44:49 +0100 To: "Paul E. McKenney" <paulmck@us.ibm.com>
* Paul E. McKenney <paulmck@us.ibm.com> wrote:
> Hello!
>
> The attached patch uses RCU to avoid the need to acquire tasklist_lock
> in the single-thread case of clock_gettime(). Still acquires
> tasklist_lock when asking for the time of a (potentially
> multithreaded) process.
>
> Experimental, has been touch-tested on x86 and POWER. Requires RCU on
> task_struct. Further more focused testing in progress.
>
> Thoughts? (Why? Some off-list users want to be able to monitor CPU
> consumption of specific threads. They need to do so quite frequently,
> so acquiring tasklist_lock is inappropriate.)
looks good to me - i have added this to the -rt tree, it should show up
in 2.6.14-rt3.
Ingo
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- Previous message: Ingo Molnar: "[patch] preempt-trace.patch"
- In reply to: Paul E. McKenney: "[RFC,PATCH] RCUify single-thread case of clock_gettime()"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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