Merge pull request #34 from leograba/xenomai-tune

xenomai: tune kernel config for low latency

recipes-kernel/linux/files/xenomai.cfg

@@ -3,12 +3,38 @@
 #
 CONFIG_IRQ_PIPELINE=y
 
+#
+# Timers subsystem
+#
+CONFIG_CONTEXT_TRACKING=y
+# CONFIG_CONTEXT_TRACKING_FORCE is not set
+CONFIG_NO_HZ=n
+
+#
+# CPU/Task time and stats accounting
+#
+CONFIG_VIRT_CPU_ACCOUNTING=y
+# CONFIG_TICK_CPU_ACCOUNTING is not set
+CONFIG_VIRT_CPU_ACCOUNTING_GEN=y
+
+#
+# RCU Subsystem
+#
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_FANOUT=64
+CONFIG_RCU_FANOUT_LEAF=16
+# CONFIG_RCU_FAST_NO_HZ is not set
+# CONFIG_RCU_BOOST is not set
+CONFIG_RCU_NOCB_CPU=y
+# CONFIG_TASKS_TRACE_RCU_READ_MB is not set
+
 #
 # Processor type and features
 #
 CONFIG_EVL=y
-# CONFIG_EVL_SCHED_QUOTA is not set
-# CONFIG_EVL_SCHED_TP is not set
+CONFIG_EVL_SCHED_QUOTA=y
+CONFIG_EVL_SCHED_TP=y
+CONFIG_EVL_SCHED_TP_NR_PART=4
 # CONFIG_EVL_HIGH_PERCPU_CONCURRENCY is not set
 CONFIG_EVL_RUNSTATS=y
 # CONFIG_EVL_NET is not set
@@ -37,6 +63,12 @@ CONFIG_EVL_LATENCY_IRQ=0
 CONFIG_DOVETAIL=y
 CONFIG_DOVETAIL_LEGACY_SYSCALL_RANGE=y
 
+#
+# Power management and ACPI options
+#
+CONFIG_SUSPEND=n
+CONFIG_PM=n
+
 #
 # CPU Frequency scaling
 #
@@ -51,3 +83,8 @@ CONFIG_CPU_FREQ_GOV_ONDEMAND=n
 CONFIG_EVL_LATMUS=y
 CONFIG_EVL_HECTIC=y
 # end of Out-of-band device drivers
+
+CONFIG_DEBUG_IRQ_PIPELINE=y
+# CONFIG_IRQ_PIPELINE_TORTURE_TEST is not set
+CONFIG_DEBUG_DOVETAIL=y
+CONFIG_RAW_PRINTK=y