linux-kernel - Re: RFC: issues concerning the next NAPI interface

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Message-ID: <OFB48299BB.9D9BCE91-ON87257341.006139E9-88257341.00614EB7@us.ibm.com>
Date:	Fri, 24 Aug 2007 10:45:17 -0700
From:	Shirley Ma <xma@...ibm.com>
To:	linas@...tin.ibm.com (Linas Vepstas)
Cc:	akepner@....com, linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>, Marcus@...abs.org,
	Eder <meder@...ibm.com>, netdev <netdev@...r.kernel.org>,
	netdev-owner@...r.kernel.org,
	Jan-Bernd Themann <ossthema@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Stefan Roscher <stefan.roscher@...ibm.com>,
	Jan-Bernd Themann <themann@...ibm.com>,
	Thomas Klein <tklein@...ibm.com>
Subject: Re: RFC: issues concerning the next NAPI interface

> Just to be clear, in the previous email I posted on this thread, I
> described a worst-case network ping-pong test case (send a packet, wait
> for reply), and found out that a deffered interrupt scheme just damaged
> the performance of the test case. 

When splitting rx and tx handler, I found some performance gain by 
deffering interrupt scheme in tx not rx in IPoIB driver.

Shirley
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