Thread View: comp.sys.transputer
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Started by Greg Burns
Thu, 15 Feb 1990 18:31
Re: info
Author: Greg Burns
Date: Thu, 15 Feb 1990 18:31
Date: Thu, 15 Feb 1990 18:31
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The 89.1 Logical Systems Transputer Toolset does support relocatable code using almost exactly the same method as the Unidot compiler. Trollius has the same requirement here as Qix and I couldn't agree more with Robert's comments about Unidot versus Logical Systems service. LSTT is also cheaper, available in source, and has a development future that inspires confidence in OEMs and end-users alike. Since you mentioned putting a real operating system on a chip, what is the Qix policy on the old bad pointer crashes system transputer problem and what is the Qix policy on multiple users sharing a chip? --Greg
Re: info
Author: Colin Plumb
Date: Thu, 15 Feb 1990 22:53
Date: Thu, 15 Feb 1990 22:53
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In article <9002151831.AA11345@tbag.osc.edu> gdburns@TBAG.OSC.EDU (Greg Burns) writes: > Since you mentioned putting a real operating system on a chip, what > is the Qix policy on the old bad pointer crashes system transputer > problem and what is the Qix policy on multiple users sharing a chip? As John said, Qix allocates processors to users so you can isolate the effects of a crash. You can share processors if you really want to, although the calls have all changed since I was at Cogent and I can't tell you the details. The allocation is dynamic so you can grab all the chips for a few seconds of heavy grinding. If a chip crashes in a resource server, the bus controller (a dedicated T414 which manages the link switches) notices that it's not being sent heartbeat messages any more and reboots the offending chip. In a workstation, if the main processor crashes, there's not a lot anyone can do, but that's why the workstations have two processors: so you can run risky stuff on the slave, which the master can kick if it's down :-). -- -Colin
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