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Diffstat (limited to 'Documentation/admin-guide/sysctl/kernel.rst')
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 032c7cd3cede..ff41dfacb34b 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -46,6 +46,7 @@ show up in /proc/sys/kernel: - hung_task_check_interval_secs - hung_task_warnings - hyperv_record_panic_msg +- iso_cpu - kexec_load_disabled - kptr_restrict - l2cr [ PPC only ] @@ -82,6 +83,7 @@ show up in /proc/sys/kernel: - randomize_va_space - real-root-dev ==> Documentation/admin-guide/initrd.rst - reboot-cmd [ SPARC only ] +- rr_interval - rtsig-max - rtsig-nr - sched_energy_aware @@ -105,6 +107,7 @@ show up in /proc/sys/kernel: - unknown_nmi_panic - watchdog - watchdog_thresh +- yield_type - version @@ -438,6 +441,16 @@ When kptr_restrict is set to (2), kernel pointers printed using %pK will be replaced with 0's regardless of privileges. +iso_cpu: (MuQSS CPU scheduler only) +=================================== + +This sets the percentage cpu that the unprivileged SCHED_ISO tasks can +run effectively at realtime priority, averaged over a rolling five +seconds over the -whole- system, meaning all cpus. + +Set to 70 (percent) by default. + + l2cr: (PPC only) ================ @@ -905,6 +918,20 @@ ROM/Flash boot loader. Maybe to tell it what to do after rebooting. ??? +rr_interval: (MuQSS CPU scheduler only) +======================================= + +This is the smallest duration that any cpu process scheduling unit +will run for. Increasing this value can increase throughput of cpu +bound tasks substantially but at the expense of increased latencies +overall. Conversely decreasing it will decrease average and maximum +latencies but at the expense of throughput. This value is in +milliseconds and the default value chosen depends on the number of +cpus available at scheduler initialisation with a minimum of 6. + +Valid values are from 1-1000. + + rtsig-max & rtsig-nr: ===================== @@ -1175,3 +1202,13 @@ is 10 seconds. The softlockup threshold is (2 * watchdog_thresh). Setting this tunable to zero will disable lockup detection altogether. + + +yield_type: (MuQSS CPU scheduler only) +====================================== + +This determines what type of yield calls to sched_yield will perform. + + 0: No yield. + 1: Yield only to better priority/deadline tasks. (default) + 2: Expire timeslice and recalculate deadline. |