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Add a note about userland DTracing.

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Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Rui Paulo 2010-09-13 17:49:39 +00:00
parent 747e7efda0
commit d69eb5201d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=212567
1 changed files with 10 additions and 0 deletions
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@ -22,6 +22,16 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 9.x IS SLOW:
machines to maximize performance. (To disable malloc debugging, run
ln -s aj /etc/malloc.conf.)
20100913:
DTrace has grown support for userland tracing. Due to this, DTrace is
now i386 and amd64 only.
dtruss(1) is now installed by default on those systems and a new
kernel module is needed for userland tracing: fasttrap.
No changes to your kernel config file are necessary to enable
userland tracing, but you might consider adding 'STRIP=' and
'CFLAGS+=-fno-omit-frame-pointer' to your make.conf if you want
to have informative userland stack traces in DTrace (ustack).
20100725:
The acpi_aiboost(4) driver has been removed in favor of the new
aibs(4) driver. You should update your kernel configuration file.