From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: rps perfomance WAS(Re: rps: question Date: Thu, 15 Apr 2010 13:25:26 -0700 Message-ID: <4BC77636.5060506@hp.com> References: <1271268242.16881.1719.camel@edumazet-laptop> <1271271222.4567.51.camel@bigi> <20100415.014857.168270765.davem@davemloft.net> <1271332528.4567.150.camel@bigi> <4BC741AE.3000108@hp.com> <1271362581.23780.12.camel@bigi> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: David Miller , eric.dumazet@gmail.com, therbert@google.com, netdev@vger.kernel.org, robert@herjulf.net, xiaosuo@gmail.com, andi@firstfloor.org To: hadi@cyberus.ca Return-path: Received: from g1t0027.austin.hp.com ([15.216.28.34]:39106 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756564Ab0DOUZ3 (ORCPT ); Thu, 15 Apr 2010 16:25:29 -0400 In-Reply-To: <1271362581.23780.12.camel@bigi> Sender: netdev-owner@vger.kernel.org List-ID: jamal wrote: > On Thu, 2010-04-15 at 09:41 -0700, Rick Jones wrote: > > >>IPS (~= RPS) was running on shared FSB HP9000's. Now, that was also a BSD >>networking stack with netisrq's and the like. TOPS (~= RFS) was also run on >>shared FSB HP9000s, as well as CC-NUMA HP9000s and Integrity systems. TOPS was >>implemented in a Streams-based stack tracing its history to a common ancestor >>with Solaris (Mentat). > > > Sounds interesting. > Wikipedia information overload. Any arch description of the HP9000? I should have been more specific - HP 9000 Model 800's :) PA-RISC based business computers running HP-UX. In the case of IPS, HP-UX 10.20 ca 1995 or so. > Did your scheme use IPIs to message the other CPUs? Netisrs were kernel processes one per CPU (back then a core, a processor and a CPU were one and the same :), and while we didn't call them IPI's, yes, it was a "soft interrupt" directed at the given processor to launch the netisr if it wasn't already running. TOPS was similar, but was with Streams and that did/does have some kernel processes not everything would happen as a kernel process. rick jones HP 3000 Model 900's - by and large the same PA-RISC hardware but running MPE/XL (later called MPE/iX) HP 9000 Model 700's - PA-RISC based workstations HP 9000 Model 300's - Moto 68K-based workstations (replaced by the 700s)