Sorry for the late response, I had to reinstall my system after a FS corruption... On Mon, Nov 09, 2020 at 05:31:43PM +0100, Sebastian Andrzej Siewior wrote: > > These test run only very short with hackbench as worlkload (5 minutes). > > Though I running these tests now for more than year with v4.4-rt and > > some times the newer -rt releases and I've never seen the latency > > numbers above 200us unless something was broken. Given that 5 minutes is > > not really long, I'll let those test run for longer to see if I get the > > same results when they run for one hour. - 5.9.0-rc8-rt12, ca 5h T: 0 (11626) P:80 C:15092432 Min: 17 Act: 34 Avg: 43 Max: 226 - 5.9.0-rc8-rt13, ca 1.5h T: 0 (24661) P:80 C:5581936 Min: 21 Act: 35 Avg: 45 Max: 250 - 5.9.0-rc8-rt14, ca 1h T: 0 ( 942) P:80 C:6522320 Min: 20 Act: 27 Avg: 44 Max: 352 This matches with the 5 minutes runs. -rt13 was still okay and -rt14 is clearly worse. > > 5.10.0-rc2-rt4 vs 5.10.0-rc2-rt4(lazy preemption disabled) > > > > 0_cyclicdeadline t2-max-latency pass/pass 274.00/ 61.00 349.18% > > So the value went from 274us to 61us after disabling lazy-preempt? Yes, that was all I changed. I want to redo this measurement. It really looks a bit bogus. Though, one thing after the other :) Daniel
