netdev - Re: [net-next 03/10] ixgbe: Drop the TX work limit and instead just leave it to budget

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Message-ID: <4E528437.5060302@intel.com>
Date:	Mon, 22 Aug 2011 09:30:47 -0700
From:	Alexander Duyck <alexander.h.duyck@...el.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>, davem@...emloft.net,
	netdev@...r.kernel.org, gospo@...hat.com
Subject: Re: [net-next 03/10] ixgbe: Drop the TX work limit and instead just
 leave it to budget

On 08/21/2011 07:01 AM, Ben Hutchings wrote:
> On Sun, 2011-08-21 at 00:29 -0700, Jeff Kirsher wrote:
>> From: Alexander Duyck<alexander.h.duyck@...el.com>
>>
>> This change makes it so that the TX work limit is now obsolete.  Instead of
>> using it we can instead rely on the NAPI budget for the number of packets
>> we should clean per interrupt.  The advantage to this approach is that it
>> results in a much more balanced work flow since the same number of RX and
>> TX packets should be cleaned per interrupts.
> [...]
>
> This seems kind of sensible, but it's not how Dave has been recommending
> people to account for TX work in NAPI.
>
> Ben.
>
I wasn't aware there was a recommended approach.  Could you tell me more 
about it?

As I stated in the patch description this approach works very well for 
me, especially in routing workloads since it typically keeps the TX 
clean-up in polling as long as the RX is in polling.

Thanks,

Alex
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