From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarod Wilson Subject: Re: [PATCH perftest] perftest: make inline send on ocrdma work better Date: Fri, 19 Aug 2016 17:12:42 -0400 Message-ID: <20160819211242.GY1916@redhat.com> References: <1471633611-41155-1-git-send-email-jarod@redhat.com> <85f0801f-a78f-7091-7ae2-5febde6b19b6@opengridcomputing.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <85f0801f-a78f-7091-7ae2-5febde6b19b6-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Steve Wise Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Gil Rockah , Jason Gunthorpe List-Id: linux-rdma@vger.kernel.org On Fri, Aug 19, 2016 at 03:45:57PM -0500, Steve Wise wrote: > On 8/19/2016 2:06 PM, Jarod Wilson wrote: > >The ocrdma driver supports a maximum inline send size of 224, while the > >current code sets this size to 236. Add an ocrdma-specific check when > >setting max inline size to eliminate the need to always pass -I 224 when > >running ib_send_lat on ocrdma hardware. > > > We really should fix the RDMA uAPI to allow querying the device to > get the max inline size for various SQ WRs (it might vary for send > vs write, for example), instead of requiring applications to guess > or hardcoding benchmarks based on device name... > This was a nice quick hack Friday afternoon hack to get it working with existing kernels in our testing infra, but having a way to ask the hardware would definitely be vastly superior. -- Jarod Wilson jarod-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org -- 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