Sending the same again, this time cc the list.
On Sun, Jan 21, 2018 at 7:34 PM, Hans Petter Selasky <h...@selasky.org> wrote: > On 01/21/18 16:41, Johannes Lundberg wrote: > >> Hi >> >> Finally I found the root to the problem that's been having me puzzled for >> the last week. >> >> I started playing UT2004 on my laptop while away from home. Worked >> perfectly. When I'm home and connect external display+mouse/keyboard, I >> get >> weird random lag. >> >> It is intr process that goes up to 100% CPU usage (swi4: clock) for a >> couple of seconds every 30 seconds or so, but only when I'm moving around >> in the game. To move around you need to hold down any of the wasd-keys. >> >> Turns out, the interrupt storms only happen when I use my external >> keyboard, not with the laptop keyboard. >> >> The internal keyboard is: >> atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 >> atkbd0: <AT Keyboard> irq 1 on atkbdc0 >> >> and external (Microsoft sculpt ergonomic desktop): >> ugen0.2: <Microsoft Microsoft 2.4GHz Transceiver v9.0> at usbus0 >> ukbd0: <Microsoft Microsoft 2.4GHz Transceiver v9.0, class 0/0, rev >> 2.00/7.97, addr 1> on usbus0 >> >> The game runs with a linux binary. 32/64bit both act the same. >> It uses libSDL-1.2 from /compat/linux/lib for rendering but not sure about >> input events. >> >> I tried lowering the key repeat rate both with xset and kbdcontrol but it >> has no effect. >> >> I don't have any wired USB keyboard to try with. >> >> Anyone have a clue to what's going on? >> >> Hardware is Dell Latitude E7270 >> with >> FreeBSD 12-CURRENT >> drm-next-kmod >> linux-c6 >> > > Hi, > > What does "vmstat -i" say? > Don’t remember the exact values now but it says cpu0:timer is getting A LOT of interrupts. Like at least 10-50x the others. Otherwise normal. > > The issue can also be caused by a timer with a small or zero timeout. > > This can be checked by setting: > kern.eventtimer.periodic=1 > > in /boot/loader.conf and rebooting. > Wow, kern.eventtimer.periodic=1 really made all the difference. No problem at all now and all cpu timers have equal interrupt total and rate. What does kern.eventtimer.periodic do? The sysctl description wasn't that elaborate... > --HPS > _______________________________________________ email@example.com mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"