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Date: Thu, 15 Apr 2010 13:25:26 -0700 From: Rick Jones <rick.jones2@...com> To: hadi@...erus.ca CC: David Miller <davem@...emloft.net>, eric.dumazet@...il.com, therbert@...gle.com, netdev@...r.kernel.org, robert@...julf.net, xiaosuo@...il.com, andi@...stfloor.org Subject: Re: rps perfomance WAS(Re: rps: question 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) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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