Nivedita Singhvi wrote:
Armin Steinhoff wrote:
If tuned properly, PREEMPT_RT can easily handle 1ms requirements. On a
standard x86 CPU (we support others than x86) our goal is never to be
I did a test with user space based CAN driver.
Already the standard distribution of SUSE 11.2 (non RT) was able to
handle 1000 frames per seconds sent by a QNX6 machine !!
If your requirements are "never to exceed" a certain latency,
I highly recommend you run tests for long-durations, rather
than a short period. A 10-min or even a 1 hour run will not
give you a full idea as a 24-72 hour run will.
The test was running for more than 12 hours. That's the typical test
before the software will be released.
The PREEMPT_RT version of SUSE 11.2 is much, much faster :-)
over 100us in reaction time.
The latency test of PREEMPT_RT shows a latency of ~10us for a
dual-core box at 1.8GHz.
Are you using cyclictest? And how long did you run it for?
Several hours ...
--Armin
PS: my initial post has been posted again because of internet problems,
sorry.
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