dtrace's hotkernel script reports a memory location (0xffffffff80)
instead of a function name
Alexander Best
arundel at freebsd.org
Wed Mar 30 00:58:43 UTC 2011
hi there,
while running the hotkernel dtrace script from DTraceToolkit-0.99 i noticed the
following:
[...]
kernel`sopoll_generic 60 0.1%
kernel`bcopy 80 0.2%
kernel`uma_zalloc_arg 100 0.2%
kernel`selrecord 100 0.2%
kernel`__curthread 110 0.2%
kernel`syscallenter 120 0.2%
kernel`fget_unlocked 130 0.3%
kernel`0xffffffff80 140 0.3%
kernel`copyin 190 0.4%
kernel`copyout 220 0.4%
kernel`inl 491 1.0%
kernel`atomic_cmpset_long 570 1.1%
kernel`write_rflags 652 1.3%
kernel`ia32_pause 1211 2.4%
kernel`cpu_mwait 1610 3.2%
kernel`sched_idletd 1900 3.8%
kernel`acpi_cpu_c1 40284 80.3%
i talked to a few people on #bsddev, but nobody could tell me what 0xffffffff80
was refering to.
kgdb(1) reports "Error accessing memory address 0xffffffff80: Bad address" for
that location.
any idea?
--
a13x
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