On Mon, 09 Aug 2004 17:08:57 -0400 Lee Revell <rlrevell@xxxxxxxxxxx> wrote: > OK. I am going to plug the book however because it's so good: > http://www.amazon.com/exec/obidos/tg/detail/-/0131019082?v=glance. It really looks good :) > > > This seems to be not true for the threaded IRQ handlers in VP [top > > extract]: > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 118 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 5 > > > > > > mango:~# chrt -p 118 > > pid 118's current scheduling policy: SCHED_OTHER > > pid 118's current scheduling priority: 0 > > > > Or do chrt and top print wrong infos? Or do i just read them wrong? > > I'm especially amazed about the SCHED_OTHER. > > > > You are correct, they run at the same elevated priority as all kernel > threads, not higher. This would explain why X activity can delay the > interrupt handlers with the default settings - on Debian the X server > runs at nice -10. I am pretty sure that one patch series (-L or -M) > ran the interrupt threads reniced to -51. I have sent a mail to Ingo asking for clarification. Flo -- Palimm Palimm! http://affenbande.org/~tapas/
