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: 103376,71b19e01eae3a390 X-Google-Attributes: gid103376,public From: Robert Dewar Subject: Re: delay until and GNAT - expand Date: 1999/05/11 Message-ID: <7h830a$e4$1@nnrp1.deja.com>#1/1 X-Deja-AN: 476396868 References: <7gpukr$s82$1@nnrp1.dejanews.com> <7grkbb$cee$1@nnrp1.deja.com> <7grvka$lc5$1@nnrp1.deja.com> <7h1e10$drg$1@nnrp1.deja.com> X-Http-Proxy: 1.0 x40.deja.com:80 (Squid/1.1.22) for client 205.232.38.14 Organization: Deja.com - Share what you know. Learn what you don't. X-Article-Creation-Date: Tue May 11 02:00:43 1999 GMT Newsgroups: comp.lang.ada X-Http-User-Agent: Mozilla/4.04 [en] (OS/2; I) Date: 1999-05-11T00:00:00+00:00 List-Id: In article , rracine@draper.com (Roger Racine) wrote: > I just did a little checking on Wind Rivers' web site, and I > found, for the "MV167C" Motorola 68K board (they do not > specify which chip or speed in the web page), "context > switching requires only 3.8 microseconds". Not exactly 1 > microsecond, but I got the order of magnitude correct. I would say this shows you likely got the order of magnitude one off. Implementation of a delay involves more than a simple context switch. As I say, we will measure the WR VXW speed on a fast machine and see what we get. I am willing to bet you are way off in the one microsecond estimate. Yes, it would be nice if it were only one microsecond, but I am afraid we will not see it. Anyway, let's wait till we can get some data here. --== Sent via Deja.com http://www.deja.com/ ==-- ---Share what you know. Learn what you don't.---