From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f7344,2ca728eed41e96c7 X-Google-Attributes: gidf7344,public X-Google-Thread: 103376,2ca728eed41e96c7 X-Google-Attributes: gid103376,public From: kilgallen@eisner.decus.org (Larry Kilgallen) Subject: Re: DEC Ada tasks and multiprocessors Date: 1997/05/23 Message-ID: <1997May23.111849.1@eisner>#1/1 X-Deja-AN: 243351360 X-Nntp-Posting-Host: eisner.decus.org References: <338453EE.15F0@elca-matrix.ch> X-Nntp-Posting-User: KILGALLEN X-Trace: 864400745/15266 Organization: LJK Software Newsgroups: comp.lang.ada,comp.os.vms Date: 1997-05-23T00:00:00+00:00 List-Id: In article <338453EE.15F0@elca-matrix.ch>, Mats Weber writes: > We are using DEC Ada 3.3 for AXP, and our current problem is that we > cannot use multiple processors for the Ada tasks in a single Ada > program. We do not want to split the application into multiple > programs/processes because that would be too much work. A single process on VMS V6 can only use one CPU at a time. That is an operating system constraint which has been in VMS since 1978. The constraint is lifted on VMS V7 for Alpha. > We are running VMS 6.2 on Alpha's with multiple processors. We can't > upgrade to VMS 7.1 now due to our customer's constraints (it's a large > system with peripherals that are not yet ready for VMS 7.1 (drivers, > etc.)). I just updated a driver which was NEVER, EVER going to run on anything past VMS V6.2 so that it can be used on VMS V7.1 because the folks who signed 20 year contracts for continued manufacture of a particular model of hardware changed their mind. Updating the driver was straightforward because there was no need for 64-bit addressing support. A recompile and relink (with the proper OS libraries) was all it needed. Of course a lot of time the problem is that driver source is controlled by a different organization which is not so interested in upgrading. Larry Kilgallen