From owner-freebsd-current@FreeBSD.ORG  Thu Jul 27 21:23:39 2006
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To: freebsd-current@freebsd.org
From: Olivier Warin <daffy@xview.net>
Date: Thu, 27 Jul 2006 23:22:56 +0200
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Subject: KTR_SCHED broken ?
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Hi,

root@gw:~/RTBench-0.1/results #> sysctl debug.ktr
debug.ktr.alq_enable: 1
debug.ktr.alq_file: /tmp/ktr.out
debug.ktr.alq_depth: 32768
debug.ktr.alq_failed: 0
debug.ktr.alq_cnt: 0
debug.ktr.alq_max: 0
debug.ktr.clear: 0
debug.ktr.version: 2
debug.ktr.entries: 32768
debug.ktr.compile: 536870912
debug.ktr.mask: 536870912
debug.ktr.cpumask: -1

daffy@gw:~ %> ll /tmp/ktr.out
-rw-------  1 root  wheel     0B Jul 17 21:13 /tmp/ktr.out

root@gw:~ #> ktrdump -ct
index  cpu timestamp        trace
------ --- ---------------- -----

nothing...

[FROM MY KERNCONF]
options KTR
options ALQ
options KTR_ALQ
options KTR_ENTRIES=32768
options KTR_COMPILE=KTR_SCHED
options KTR_MASK=KTR_SCHED
[EOF]

While KTR_INTR works, it seems that KTR_SCHED does not or maybee  
there is a magic sause ?
Best regards,
--
Olivier Warin