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Date:	Fri, 09 Mar 2007 08:25:23 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Linsys Contractor Mithlesh Thukral <mithlesh@...xen.com>
CC:	netdev@...r.kernel.org, amitkale@...xen.com, jeff@...zik.org,
	netxenproj@...syssoft.com, rob@...xen.com
Subject: Re: [PATCH 2/5] NetXen: Update the statistics counter for interrupts

Linsys Contractor Mithlesh Thukral wrote:
> NetXen: Update the statistics counter for interrupts which have occured.
>
> Signed-off-by: Mithlesh Thukral <mithlesh@...xen.com>
> ---
>
>  drivers/net/netxen/netxen_nic_main.c |    1 +
>  1 files changed, 1 insertion(+)
>
> diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
> index bfeca9a..5fbf6b0 100644
> --- a/drivers/net/netxen/netxen_nic_main.c
> +++ b/drivers/net/netxen/netxen_nic_main.c
> @@ -1023,6 +1023,7 @@ netxen_handle_int(struct netxen_adapter 
>  	u32 ret = 0;
>  
>  	DPRINTK(INFO, "Entered handle ISR\n");
> +	adapter->stats.ints++;
>  
>   
You may want to consider the cost of the additional cache miss.
Either don't bother with this stat, or go to per-cpu stats.
Plus isn't this already in the statistics kept for /proc/interrupts?
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