linux-kernel - Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction rollback

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Message-ID: <CAOGi=dP2AnDTT4ScZ8fF3gsZ7o4V_nayngFRrb=R3Z_LqWL8ig@mail.gmail.com>
Date:	Tue, 20 Oct 2015 10:57:53 +0800
From:	Ling Ma <ling.ma.program@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	peterz@...radead.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org, Ma Ling <ling.ml@...baba-inc.com>,
	Waiman.Long@....com
Subject: Re: [RFC PATCH] qspinlock: Improve performance by reducing load
 instruction rollback

>
> So it would be nice to create a new user-space spinlock testing facility, via a
> new 'perf bench spinlock' feature or so. That way others can test and validate
> your results on different hardware as well.
>
Attached the spinlock test module . Queued spinlock will run very
slowly in user space
because process switch context, it is OK for  spinlock-test
implementation with kernel module ?

Thanks
Ling

Download attachment "spinlock.tar.bz2" of type "application/x-bzip2" (4152 bytes)