From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: [PATCH v7 3/3] KVM: perf: kvm events analysis tool
Date: Mon, 27 Aug 2012 13:34:36 -0600
Message-ID: <503BCBCC.8060509@gmail.com>
References: <1346061106-5364-1-git-send-email-haodong@linux.vnet.ibm.com> <1346061106-5364-4-git-send-email-haodong@linux.vnet.ibm.com> <20120827155331.GA18224@turtle.usersys.redhat.com>
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Cc: Dong Hao <haodong@linux.vnet.ibm.com>, avi@redhat.com,
	acme@infradead.org, mtosatti@redhat.com, mingo@elte.hu,
	xiaoguangrong@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org
To: Andrew Jones <drjones@redhat.com>
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In-Reply-To: <20120827155331.GA18224@turtle.usersys.redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

On 8/27/12 9:53 AM, Andrew Jones wrote:
> On Mon, Aug 27, 2012 at 05:51:46PM +0800, Dong Hao wrote:
>
> <snip>
>
>> +struct event_stats {
>> +	u64 count;
>> +	u64 time;
>> +
>> +	/* used to calculate stddev. */
>> +	double mean;
>> +	double M2;
>> +};
>
> How about moving the stats functions from builtin-stat.c to e.g.
> util/stats.c, and then reusing them? Then this struct (which I would
> rename to kvm_event_stats) would look like this
>
> struct kvm_event_stats {
>          u64 time;
>          struct stats stats;
> };
>
> of course the get_event_ accessor generators would need tweaking

Given the history of the command (first submitted back in February) code 
refactoring can wait until there is a second user for the stats code.

David