This is excellent, thanks... and you aren't even here, yet! :)
The software in question was tested on a flight avionics board for the X-34, which was a rad-hard PowerPC 750 (presumably the RAD750), and used about 2-3% of CPU except during control events, when utilization spiked to 20% for a couple of seconds. We could push it down to 10% if we were willing to broaden the high-demand spike somewhat. So I'm telling the instrument avionics guys that we'll need about 15% equivalent of a rad-hard 750. If I went by MIPS ratings, that'd be about 35 MIPS or roughly a i486-class processor. Which is not what they wanted to hear, they were trying to use a old 16-bit board.
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Date: 2006-05-23 05:16 am (UTC)The software in question was tested on a flight avionics board for the X-34, which was a rad-hard PowerPC 750 (presumably the RAD750), and used about 2-3% of CPU except during control events, when utilization spiked to 20% for a couple of seconds. We could push it down to 10% if we were willing to broaden the high-demand spike somewhat. So I'm telling the instrument avionics guys that we'll need about 15% equivalent of a rad-hard 750. If I went by MIPS ratings, that'd be about 35 MIPS or roughly a i486-class processor. Which is not what they wanted to hear, they were trying to use a old 16-bit board.