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-rw-r--r--Documentation/sysctl/kernel.txt26
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 6fccb69c0..f1a8333dd 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -38,6 +38,7 @@ show up in /proc/sys/kernel:
- hung_task_timeout_secs
- hung_task_warnings
- kexec_load_disabled
+- iso_cpu
- kptr_restrict
- kstack_depth_to_print [ X86 only ]
- l2cr [ PPC only ]
@@ -66,6 +67,7 @@ show up in /proc/sys/kernel:
- randomize_va_space
- real-root-dev ==> Documentation/initrd.txt
- reboot-cmd [ SPARC only ]
+- rr_interval
- rtsig-max
- rtsig-nr
- sem
@@ -384,6 +386,16 @@ kernel stack.
==============================================================
+iso_cpu: (BFS 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)
This flag controls the L2 cache of G3 processor boards. If
@@ -723,6 +735,20 @@ rebooting. ???
==============================================================
+rr_interval: (BFS 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:
The file rtsig-max can be used to tune the maximum number