https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207068
--- Comment #8 from joss.up...@yahoo.com ---
(In reply to Konstantin Belousov from comment #7)
Not sure why you can't reproduce, but I'm doing the equivalent of the shell
script below. Note the ",usr" and the lowercase p.
On a 4 core machine:
while true; do
for a in 1 2 3 4 5 6 7 8; do
pmcstat -p CPU_CLK_UNHALTED_CORE,usr perl loop.pl &
done
sleep 10
killall perl
done
This ensures that the PMCs are csw in/out very often (every hz).
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