Philippe Gerum wrote:
Btw, unless I'm mistaken, Marc initially compared the LXRT-based user/latency running with a 10Khz period with a fusion based one running at 1Khz. This is not really fair: the more you allow Linux to trash the cache with a higher sleep delay, the more latency you will get to reinstate the test context. What would have been more appropriate is to run the POSIX test at 10Khz too (if it does not break, I mean :o), or downgrade the LXRT period to 1Khz.
I think that what counts more on longer periods and on most todays machines is the CPU frequency scattering. I think it is call spread spectrum. With that disabled in the BIOS there should be no difference.
PAolo.
