1 files changed, 89 insertions, 0 deletions

diff --git a/litmus/Kconfig b/litmus/Kconfig
index ad8dc8308cf0..7e865d4dd703 100644
--- a/litmus/Kconfig
+++ b/litmus/Kconfig
@@ -62,6 +62,25 @@ config LITMUS_LOCKING
 
 endmenu
 
+menu "Performance Enhancements"
+
+config SCHED_CPU_AFFINITY
+        bool "Local Migration Affinity"
+        default y
+        help
+          Rescheduled tasks prefer CPUs near to their previously used CPU.  This
+          may improve performance through possible preservation of cache affinity.
+
+          Warning: May make bugs ahrder to find since tasks may migrate less often.
+
+          NOTES:
+                * Pfair/PD^2 does not support this option.
+                * Only x86 currently supported.
+
+          Say Yes if unsure.
+
+endmenu
+
 menu "Tracing"
 
 config FEATHER_TRACE
@@ -182,4 +201,74 @@ config SCHED_DEBUG_TRACE_CALLER
 
 endmenu
 
+menu "Interrupt Handling"
+
+config LITMUS_THREAD_ALL_SOFTIRQ
+       bool "Process all softirqs in ksoftirqd threads."
+       default n
+       help
+             (Experimental) Thread all softirqs to ksoftirqd
+                 daemon threads, similar to PREEMPT_RT.  I/O
+                 throughput will will drop with this enabled, but
+                 latencies due to interrupts will be reduced.
+
+                 WARNING: Timer responsiveness will likely be
+                 decreased as timer callbacks are also threaded.
+                 This is unlike PREEEMPT_RTs hardirqs.
+
+                If unsure, say No.
+
+config LITMUS_SOFTIRQD
+       bool "Spawn klitirqd interrupt handling threads."
+           depends on LITMUS_LOCKING
+           default n
+           help
+             Create klitirqd interrupt handling threads.  Work must be
+                 specifically dispatched to these workers.  (Softirqs for
+                 Litmus tasks are not magically redirected to klitirqd.)
+
+                 G-EDF ONLY for now!
+
+             If unsure, say No.
+
+config NR_LITMUS_SOFTIRQD
+           int "Number of klitirqd."
+           depends on LITMUS_SOFTIRQD
+           range 1 4096
+           default "1"
+           help
+             Should be <= to the number of CPUs in your system.
+
+config LITMUS_NVIDIA
+          bool "Litmus handling of NVIDIA interrupts."
+          depends on LITMUS_SOFTIRQD
+          default n
+          help
+            Direct tasklets from NVIDIA devices to Litmus's klitirqd.
+
+                If unsure, say No.
+
+choice
+          prompt "CUDA/Driver Version Support"
+          default CUDA_4_0
+          depends on LITMUS_NVIDIA
+          help
+                Select the version of CUDA/driver to support.
+        
+config CUDA_4_0
+          bool "CUDA 4.0"
+          depends on LITMUS_NVIDIA
+          help
+                Support CUDA 4.0 RC2 (dev. driver version: x86_64-270.40)
+
+config CUDA_3_2
+          bool "CUDA 3.2"
+          depends on LITMUS_NVIDIA
+          help
+                Support CUDA 3.2 (dev. driver version: x86_64-260.24)
+
+endchoice
+
+endmenu
+
 endmenu