netdev - Re: [PATCH V3 0/2] vhost_net polling optimization

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Message-Id: <20160602.120806.2233781548139724198.davem@davemloft.net>
Date:	Thu, 02 Jun 2016 12:08:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	mst@...hat.com, kvm@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 0/2] vhost_net polling optimization

From: Jason Wang <jasowang@...hat.com>
Date: Wed,  1 Jun 2016 01:56:32 -0400

> This series tries to optimize vhost_net polling at two points:
> 
> - Stop rx polling for reduicng the unnecessary wakeups during
>   handle_rx().
> - Conditonally enable tx polling for reducing the unnecessary
>   traversing and spinlock touching.
> 
> Test shows about 17% improvement on rx pps.
> 
> Please review
> 
> Changes from V2:
> - Don't enable rx vq if we meet an err or rx vq is empty
> Changes from V1:
> - use vhost_net_disable_vq()/vhost_net_enable_vq() instead of open
>   coding.
> - Add a new patch for conditionally enable tx polling.

Michael, please review this patch series.

Thanks.