Re: [ANNOUNCE] rt-tests-2.0

On Mon, Jun 28, 2021 at 09:50:25AM -0400, John Kacur wrote:

quoted

I'd say the tsbuf access is the one which triggers a pagefault.

John, I would suggest to move the rt_test_start() into rt_init() and
take the timestamp at the execution start (as my initial version was). I
think the additional pain in slightly more correct start timestamp
(which is also not defined what it actually means in this context) is
just not worth the effort.

Thanks,
Daniel

Send me a patch, and I'll have a look. The timerthread()function is
sensitive anyway, so it's probably a good idea not to put that kind
of thing there.

Note that the the code following the /* Get Current Time */
is getting the time, but you probably want something rougher that
you can call strftime on?

I think it's just the buffer strftime is writting into it. The page is
probably not mapped and hence the pagefault in the first access.

Anyway, I'll send a patch which moves the rt_test_start() into rt_init().