tims@acflanl.infidel.lanl.gov (Tim Sullivan) (08/27/90)
Does anyone have any experience with a real time executive called TL Executive by Talton/Louley Engineering. I just got a package from them in my mailbox. It is for PCompatibles including XTs and rather than trying to look like UNIX, it tries to look like DOS. You program in MS C, Turbo Pascal, Quick Basic, and more. Use all your regular debugging tools, etc. They claim 12,820 task switches per second on a 16Mhz AT. The more interesting claim is that it runs DOS tasks concurrently and uses DOS device drivers for talking to devices. Now since DOS programs and drivers are not designed to be interruptible, this seems hard to believe. Does anyone have any experience with this system and can comment on their experiences? Tim Sullivan (tims@infidel.lanl.gov)
bilbo@ireq.hydro.qc.ca (08/28/90)
We provide an Object-Oriented Real Time Executive for 80x86
machines. The executive is written in C++ and is to be com-
piled with Zortech C++ compiler (2.x). A ROM locator is also
available to get Intel Hex or hp absolute code for your PROM
programmer.
On a 20 MHz DELL 210 computer we can get more than 60000 context
switch per second between PROCESS. On an 9 MHz 286 AT compatible
we get 22000 context switch per second.
But context switch time depend on what is saved/restored during the
switch (CPU reg, FPM, MMU, ...) and is do not reveal the
performance of the system. Scheduling methods is at least as
much important.
Call AIR DATA for our complete brochure (514-484-0390)
See also SIGPLAN NOTICES (APRIL or MAY)
TOOLS90 Proceedings.
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| Objective: Systems | Louis Lamarche
| CP 265, Ville Mont-Royal | bilbo@ireq.hydro.qc.ca
| QC, Canada, H3P 3C5 |