The following table lists the tunables that are new in version 5.0 of the ChorusOS operating system, along with their default settings.
Table 4-3 New ChorusOS Tunables
Tunable |
Description |
Default Setting |
---|---|---|
kern.mkstat.maxevents |
Maximum number of MKSTAT events |
1024 |
kern.systemdump.systemdumpSize |
System dump memory area size |
0x20000 |
kern.blackbox.maxBufferNumber |
Maximum number of circular buffers |
2 |
kern.blackbox.bufsize |
Size of each blackbox circular buffer (in Kb) |
64 |
kern.blackbox.maxFilterNumber |
Maximum fine-grained filters |
64 |
kern.blackbox.maxProcIdNumber |
Maximum proc ID filters |
64 |
kern.blackbox.kernelLogging |
Microkernel logging messages |
0 |
iom.persistentramdisk0 |
Current size of persistent ramdisk 0 |
0 |
iom.persistentramdisk1 |
Current size of persistent ramdisk |
0 |
iom.persistentramdisk2 |
Current size of persistent ramdisk 2 |
0 |
iom.persistentramdisk3 |
Current size of persistent ramdisk 3 |
0 |
iom.persistentramdisk4 |
Current size of persistent ramdisk 4 |
0 |
iom.persistentramdisk5 |
Current size of persistent ramdisk 5 |
0 |
iom.persistentramdisk6 |
Current size of persistent ramdisk 6 |
0 |
iom.persistentramdisk7 |
Current size of persistent ramdisk 7 |
0 |
iom.persistentramdisk8 |
Current size of persistent ramdisk 8 |
0 |
iom.persistentramdisk9 |
Current size of persistent ramdisk 9 |
0 |
iom.persistentramdiska |
Current size of persistent ramdisk 10 |
0 |
iom.persistentramdiskb |
Current size of persistent ramdisk 11 |
0 |
iom.persistentramdiskc |
Current size of persistent ramdisk 12 |
0 |
iom.persistentramdiskd |
Current size of persistent ramdisk 13 |
0 |
iom.persistentramdiske |
Current size of persistent ramdisk 14 |
0 |
iom.persistentramdiskf |
Current size of persistent ramdisk 15 |
0 |
iom.wdt.defer |
Defer watchdog interrupt processing to C_OS interrupt thread |
0 |
iom.wdt.sysdump |
watchdog triggering system dump |
0 |
iom.wdt.period |
Internal period (in ms) of the watchdog timer |
4000 |
iom.wdt.slack |
Slack time (in ms) of the internal timeout handler |
4000 |
iom.wdt.action |
Execution time (in ms) of the action taken by the watchdog interrupt handler |
2000 |
iom.wdt.maxInterval |
Maximum timeout interval (in ms) allowed by the watchdog timer API |
180000 |
iom.wdt.startupInterval |
Maximum time (in ms) required for the startup sequence to complete |
0 |
iom.wdt.shutdownInterval |
Maximum time (in ms) required for the shutdown sequence to complete |
0 |
iom.os_gauges.activestart |
OS_GAUGES signaling sysevents actived at C_OS init |
0 |
iom.os_gauges.syslog |
OS_GAUGES sysevents errors in syslog messages |
0 |
iom.bootverbose |
C_OS Activate boot verbose mode |
0 |
iom.nprocs |
C_OS maximum number of processes |
64 |
iom.nthreadsperproc |
C_OS maximum number of threads per process |
64 |
iom.nprocsperuid |
C_OS maximum number of processes per user |
63 |
iom.maxcoresize |
C_OS maximum permitted size of a core file |
2100000 |
iom.maxsockets |
C_OS maximum number of open sockets |
64 |
iom.nmbufs |
C_OS maximum number of open sockets |
2048 |
iom.userstacksize |
Default stack size of user mode threads |
0x8000 |
cgtp.filter_tab_nb |
CGTP number of filter tables |
40 |
cgtp.sub_tab_nb |
CGTP number of subtables in filter tables |
6 |
cgtp.entry_nb |
CGTP number of entries per subtable |
[2, 4096] by power of 2 |
cgtp.elem_nb |
CGTP number of elements per entry |
4 |
cgtp.resolution |
Definition of CGTP filter period |
4 |
iom.ipv6.gif.number |
Number of GIF interfaces |
1 |
iom.inet.use_hw_checksum |
Mask controlling the use of hardware checksum capability by the networking stack 0x001 -- IP header checksum 0x002 -- TCP header checksum 0x004 -- UDP header checksum 0x008 -- checksum over IP fragments 0x010 -- hardware fragments IP packets 0x100 -- IP header checksum verified on reception 0x200 -- IP header checksum is valid 0x400 -- data checksum computed on reception 0x800 -- data checksum computed with TCP/UDP pseudo headers |
0xffff |
iom.rtsig.sigqueuemax |
Maximum number of signals that can be queued per process |
32 |
sysdump.device |
Device number used to process the TFTP transfer |
0 |