You'll forgive me for being cynical here, but I seriously doubt that any Linux-derived operating systems could truly qualify as 'real-time'. To meet the requirements for an RTOS, Linux would have to be so heavily mutated that it would no longer be Linux. Cheers Chuck -----Original Message----- From: Patrick Greenwell To: Christian Kuhtz Cc: Alex Bligh; Paul Vixie; nanog@merit.edu Sent: 29/11/01 07:49 Subject: RE: Followup British Telecom outage reason On Wed, 28 Nov 2001, Christian Kuhtz wrote:
I guess some time someone will realize routers are both hardware, and software, and shock horror both, if done well, can actually add value. [hint & example: compare the scheduler on, say, Linux/FreeBSD, Windows 95 (sic), and your favourite router OS (*); pay particular attention to suitability for running realtime, or near realtime tasks, where such tasks may occasionally crash or overrun their expected timeslice; note how the best OS amongst the bunch for this aint exactly great].
(*) results may vary according to personal choice here.
Don't use a non-realtime OS for something that you expect realtime or near-realtime OS functionality. There are specific systems to address
these
kinds of needs with rather complicated scheduling mechanism to accomodate such requirements in a sensible manner.
Is IOS a realtime operating system? No. Are any of the other listed OS realtime operating systems? No.
Actually there are multiple Linux-based RTOSes.