Re: Timing issue with Dummynet on high kernel timer interrupt

2015-11-07 Thread Hans Petter Selasky
On 11/07/15 07:19, Bruce Evans wrote: I don't know if CTLFLAG_RWTUN with SYSCTL_PROC() actually works for all types, but it is used with CTLFLAG_STRING for kern.corefile. This is another bogus undocumented tunable. It is better documented as a sysctl than most since it is old so it is documente

RE: Timing issue with Dummynet on high kernel timer interrupt

2015-11-07 Thread Bruce Evans
On Sat, 7 Nov 2015, Ian Smith wrote: ... I also notice that with HPET, the timer interrupts themselves, whether as few as 60-70/s idle in one-shot mode or ~2000/s in periodic, appear in systat -vm or vmstat -w10 'Int' column, whereas with LAPIC or (yes I even tried) i8254, these timer interrupts

Re: Timing issue with Dummynet on high kernel timer interrupt

2015-11-07 Thread Bruce Evans
On Sat, 7 Nov 2015, Hans Petter Selasky wrote: On 11/07/15 07:19, Bruce Evans wrote: I don't know if CTLFLAG_RWTUN with SYSCTL_PROC() actually works for all types, but it is used with CTLFLAG_STRING for kern.corefile. This is another bogus undocumented tunable. It is better documented as a sy