From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: OMAP4430 SDP with KS8851: very slow networking Date: Fri, 7 Dec 2018 12:55:33 -0800 Message-ID: <20181207205533.GU6707@atomide.com> References: <20181206132256.GT30658@n2100.armlinux.org.uk> <20181206163154.GK6707@atomide.com> <20181206180806.GV6920@n2100.armlinux.org.uk> <20181206221447.GM6707@atomide.com> <20181207180020.GA9507@n2100.armlinux.org.uk> <20181207181420.GS6707@atomide.com> <20181207190312.GT6707@atomide.com> <20181207192731.GB9507@n2100.armlinux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Grygorii Strashko To: Russell King - ARM Linux Return-path: Received: from muru.com ([72.249.23.125]:56826 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726041AbeLGUzh (ORCPT ); Fri, 7 Dec 2018 15:55:37 -0500 Content-Disposition: inline In-Reply-To: <20181207192731.GB9507@n2100.armlinux.org.uk> Sender: netdev-owner@vger.kernel.org List-ID: * Russell King - ARM Linux [181207 19:27]: > You mentioned that edge mode didn't work as well as level mode on > duovero smsc controller, I think this may help to solve the same > issue but for edge IRQs - we need a mask_ack_irq function to avoid > acking while the edge interrupt is masked. Let me know if that > lowers the smsc ping latency while in edge mode. Looks like smsc edge interrupt is still producing varying ping latencies with this. Seems like the mas_ack_irq is a nice improvment though. Regards, Tony