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INTRO (7) NetBSD Miscellaneous Information Manual INTRO (7 ...

INTRO (7) NetBSD Miscellaneous Information Manual INTRO (7 ...

SYSCTL (7)

SYSCTL (7) NetBSD Miscellaneous Information Manual SYSCTL (7) Third level name Type Changeable kern.mbuf.mblowat integer yes kern.mbuf.mclbytes integer yes kern.mbuf.mcllowat integer yes kern.mbuf.msize integer yes kern.mbuf.nmbclusters integer yes The variables are as follows: kern.mbuf.mblowat (MBUF_MBLOWAT) The mbuf low water mark. kern.mbuf.mclbytes (MBUF_MCLBYTES) The mbuf cluster size. kern.mbuf.mcllowat (MBUF_MCLLOWAT) The mbuf cluster low water mark. kern.mbuf.msize (MBUF_MSIZE) The mbuf base size. kern.mbuf.nmbclusters (MBUF_NMBCLUSTERS) The limit on the number of mbuf clusters. The variable can only be increased, and only increased on machines with direct-mapped pool pages. kern.memlock (KERN_MEMLOCK) Returns 1 if the POSIX 1003.1b Process Memory Locking Option is available on this system, otherwise 0. kern.memlock_range (KERN_MEMLOCK_RANGE) Returns 1 if the POSIX 1003.1b Range Memory Locking Option is available on this system, otherwise 0. kern.memory_protection (KERN_MEMORY_PROTECTION) Returns 1 if the POSIX 1003.1b Memory Protection Option is available on this system, otherwise 0. kern.monotonic_clock (KERN_MONOTONIC_CLOCK) Returns the standard version the implementation of the POSIX 1003.1b Monotonic Clock Option conforms to, otherwise 0. kern.msgbuf (KERN_MSGBUF) The kernel message buffer, rotated so that the head of the circular kernel message buffer is at the start of the returned data. The returned data may contain NUL bytes. kern.msgbufsize (KERN_MSGBUFSIZE) The maximum number of characters that the kernel message buffer can hold. kern.ngroups (KERN_NGROUPS) The maximum number of supplemental groups. kern.ntptime (KERN_NTPTIME) A struct ntptimeval structure is returned. This structure contains data used by the ntpd(8) program. kern.osrelease (KERN_OSRELEASE) The system release string. NetBSD 3.0 December 27, 2007 7

SYSCTL (7) NetBSD Miscellaneous Information Manual SYSCTL (7) kern.osrevision (KERN_OSREV) The system revision string. kern.ostype (KERN_OSTYPE) The system type string. kern.pipe (KERN_PIPE) Pipe settings. The third level names for the integer pipe settings is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. Third level name Type Changeable kern.pipe.kvasiz integer yes kern.pipe.maxbigpipes integer yes kern.pipe.maxkvasz integer yes kern.pipe.limitkva integer yes kern.pipe.nbigpipes integer yes The variables are as follows: kern.pipe.kvasiz (KERN_PIPE_KVASIZ) Amount of kernel memory consumed by pipe buffers. kern.pipe.maxbigpipes (KERN_PIPE_MAXBIGPIPES) Maximum number of "big" pipes. kern.pipe.maxkvasz (KERN_PIPE_MAXKVASZ) Maximum amount of kernel memory to be used for pipes. kern.pipe.limitkva (KERN_PIPE_LIMITKVA) Limit for direct transfers via page loan. kern.pipe.nbigpipes (KERN_PIPE_NBIGPIPES) Number of "big" pipes. kern.posix1version (KERN_POSIX1) The version of ISO/IEC 9945 (POSIX 1003.1) with which the system attempts to comply. kern.posix_barriers (KERN_POSIX_BARRIERS) The version of IEEE Std 1003.1 (“POSIX.1”) and its Barriers option to which the system attempts to conform, otherwise 0. kern.posix_reader_writer_locks (KERN_POSIX_READER_WRITER_LOCKS) The version of IEEE Std 1003.1 (“POSIX.1”) and its Read-Write Locks option to which the system attempts to conform, otherwise 0. kern.posix_semaphores (KERN_POSIX_SEMAPHORES) The version of IEEE Std 1003.1 (“POSIX.1”) and its Semaphores option to which the system attempts to conform, otherwise 0. kern.posix_spin_locks (KERN_POSIX_SPIN_LOCKS) The version of IEEE Std 1003.1 (“POSIX.1”) and its Spin Locks option to which the system attempts to conform, otherwise 0. kern.posix_threads (KERN_POSIX_THREADS) The version of IEEE Std 1003.1 (“POSIX.1”) and its Threads option to which the system attempts to conform, otherwise 0. kern.posix_timers (KERN_POSIX_TIMERS) The version of IEEE Std 1003.1 (“POSIX.1”) and its Timers option to which the system attempts to conform, otherwise 0. NetBSD 3.0 December 27, 2007 8

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