Kris Kennaway wrote:
OK, you may need to set up hwpmc or LOCK_PROFILING to figure out what
your system is doing at that moment.
While experimenting with pmcstat I found that my problem seems to be
mouse-related. I did several tests - booted, logged in with xdm, started
an xterm and left 'pmcstat -S instructions' running in xterm to see where
it freezes.
As long as I don't touch the mouse, pmcstat output keeps scrolling by at
high speed. I can wait several minutes and it just keeps scrolling. But
when I start moving the mouse, soon (probably 10-20 cm of mouse movement,
but I haven't done any real measurements ;) ) there is this "hiccup". As I
said earlier, this happens only once during the session.
The same test can be done outside X, on the text console, and the
behaviour is identical. I tried with two generic 2-buttons-and-a-wheel
PS/2 mice and the results are identical. I don't have any USB mice at hand
immediately.
# grep mouse /etc/rc.conf:
moused_enable="YES"
# grep psm /var/run/dmesg.boot
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse, device ID 3
At that point it seems that faulty hardware can't be ruled out (dying
mouse port on the motherboard?). But it seems a bit strange that the
problem appears exactly once during the session. I'll try with USB mouse
tomorrow.
--
Toomas Aas
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