more data: SCHED_ULE+PREEMPTION is the problem (was: kern.sched.quantum: Creepy, sadistic scheduler

2018-04-07 Thread Peter
Hi all, in the meantime I did some tests and found the following: A. The Problem: --- On a single CPU, there are -exactly- two processes runnable: One is doing mostly compute without I/O - this can be a compressing job or similar; in the tests I used simply an endless-loop. Lets ca

Re: kern.sched.quantum: Creepy, sadistic scheduler

2018-04-07 Thread Peter
Julian Elischer wrote: for a single CPU you really should compile a kernel with SMP turned off and 4BSD scheduler. ULE is just trying too hard to do stuff you don't need. Julian, if we agree on this, I am fine. (This implies that SCHED_4BSD will *not* be retired for an indefinite time!) I te

[Bug 227342] [dpv] dpv -x is broken

2018-04-07 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227342 Bug ID: 227342 Summary: [dpv] dpv -x is broken Product: Base System Version: 11.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some Pe