From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladislav Bolkhovitin Subject: Re: [Scst-devel] [ofa-general] WinOF_2_0_5/SRP initiator: slow reads and eventually hangs Date: Mon, 14 Sep 2009 22:51:11 +0400 Message-ID: <4AAE909F.6030202@vlnb.net> References: <4A9FA945.4070408@vlnb.net> <4AA4F561.504@vlnb.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Chris Worley Cc: Bart Van Assche , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, scst-devel , OpenIB List-Id: linux-rdma@vger.kernel.org Chris Worley, on 09/11/2009 11:50 PM wrote: > I've definitely removed the switch/firmware from being the cause. > > I'm thinking the reason you can't repeat the test may be latency > related. We get ~50usecs average latency (on small block sizes), > which can't be achieved using regular SSD's (and rotating drives are > nowhere close). Maybe a ramdisk would help repeat the issue. I think you should try to reproduce the problem with ramdisk or nullio. By so you will eliminate possible influence of the SSD backend. Vlad -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html