Installation guide

Options Keyword Required Use
MACH_SCTIMES
Yes Dummy system calls for timing
ULT_BIN_COMPAT
Yes Enables ULTRIX binary
compatibility
5.6.5.7 Remote Kernel Debugging
The KDEBUG keyword controls your ability to use the dbx -remote
command. If your kernel is built with KDEBUG, you can debug the running
kernel using dbx -remote.
Note that ikdebug is the integrated interactive mode of the kdebug kernel
debugger. It provides interactive symbolic kernel debugging without the
need of a second host system to run dbx or kdbx. See the dbx
(8), kdbx(8)
and ikdebug(8) reference pages and the
Kernel Debugging guide.
5.6.5.8 Network Time Protocol Daemon
The NTP_TIME keyword enables the kernel phase lock loop (PLL) time
adjusting algorithm. This algorithm is described by the DARPA Network
Working Group Report RFC-1589, for use with the Network Time Protocol
(NTP) V3 daemon.
5.6.5.9 Autonice Threads Prioritizing
The AUTONICE keyword lowers the priority of threads that exceed 10
minutes of CPU user time. It does this by automatically "nicing" up the
priority of the thread by 4. By default, the AUTONICE feature is off. You
should enable this feature if you want threads that run for a long time to
have their priority lowered, relative to other threads. You should not enable
this feature if you routinely run threads that accumulate significant
amounts of CPU time and do not want the priority of these threads lowered.
5.6.5.10 Statistics Functionality
The following configuration file entries define the code dependencies that
enable statistics-gathering functionality. In your configuration file, include
the entries that you need:
Options Keywords Required Use
BUFCACHE_STATS
Yes Buffer cache statistics
INOCACHE_STATS
Yes Inode cache statistics
Configuring the Kernel 5–53