Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site isrnix.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!iuvax!isrnix!greg From: greg@isrnix.UUCP (Gregory R. Travis) Newsgroups: net.unix-wizards Subject: Re: Has anyone played with speeding up I/O transfers? Message-ID: <361@isrnix.UUCP> Date: Tue, 11-Dec-84 13:58:09 EST Article-I.D.: isrnix.361 Posted: Tue Dec 11 13:58:09 1984 Date-Received: Wed, 12-Dec-84 06:22:54 EST References: <750@reed.UUCP> Organization: Inst. of Social Res. (Indiana University) Lines: 22 In response to <750@reed> - yes. Here at Isrnix on our 11/44 we have more than doubled the speed at which kernel/user copies take place by writing routines that map kernel space into user space and use 'mov' instructions. I too was bothered by the amount of time spent copying buffers. We are planning a 'release' of the (long-awaited) Isrnix system sometime in mid-january. This release will be available to all 2.9BSD license holders for the cost of a tape, shipping and administrative overhead (probably ~$40). There will be a general announcement of availability to the 2BSD mailing list in January and a minor one in net.unix. Write to me if you are interested or want to know what will be included. Gregory Travis Institute of Social Research Bloomington, In 47405 (812)-335-0892 ihnp4!inuxc!isrnix!greg pur-ee!isrnix!greg -- Gregory R. Travis Institute for Social Research - Indiana University - Bloomington, In ihnp4!inuxc!isrnix!greg {pur-ee,allegra,qusavx}!isrnix!greg