Date: Tue, 1 Jul 2014 10:05:37 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
        konrad.wilk@oracle.com, pbonzini@redhat.com, gleb@redhat.com,
        paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org,
        waiman.long@hp.com, riel@redhat.com, davej@redhat.com, oleg@redhat.com,
        x86@kernel.org, jeremy@goop.org, paul.gortmaker@windriver.com,
        ak@linux.intel.com, jasowang@redhat.com, fernando_b1@lab.ntt.co.jp,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        virtualization@lists.linux-foundation.org,
        xen-devel@lists.xenproject.org, mtosatti@redhat.com,
        chegu_vinod@hp.com
Subject: Re: [RFC PATCH v2] Implement Batched (group) ticket lock
Message-ID: <20140701080537.GH6758@twins.programming.kicks-ass.net>
References: <1403947024-3193-1-git-send-email-raghavendra.kt@linux.vnet.ibm.com>
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On Sat, Jun 28, 2014 at 02:47:04PM +0530, Raghavendra K T wrote:
> In virtualized environment there are mainly three problems
> related to spinlocks that affects performance.
> 1. LHP (lock holder preemption)
> 2. Lock Waiter Preemption (LWP)
> 3. Starvation/fairness
> 
> Though Ticketlocks solve fairness problem it worsens LWP, LHP problems. Though
> pv-ticketlocks tried to address these problems we can further improve at the
>  cost of relaxed fairness. The following patch tries to achieve that by grouping
> (batched) ticketlocks.

And here I stop reading and ignore this patch, right?

Why should I look at this?
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