[PlanetCCRMA] 3ms latency in ccrma kernel

[Jiri Kastner]

seems ccrma kernel has disabled rt at all :)

see bellow:

--- config-ccrma.sorted	2016-04-23 09:47:08.175969867 +0200
+++ config-rt.sorted	2016-04-23 09:47:25.856547548 +0200
@@ -581,7 +581,6 @@
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_IDLE_GOV_MENU=y
 CONFIG_CPU_IDLE=y
-CONFIG_CPUMASK_OFFSTACK=y
 CONFIG_CPU_RMAP=y
 CONFIG_CPUSETS=y
 CONFIG_CPU_SUP_AMD=y
@@ -1345,6 +1344,7 @@
 CONFIG_HAVE_PERF_EVENTS=y
 CONFIG_HAVE_PERF_REGS=y
 CONFIG_HAVE_PERF_USER_STACK_DUMP=y
+CONFIG_HAVE_PREEMPT_LAZY=y
 CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
 CONFIG_HAVE_SETUP_PER_CPU_AREA=y
 CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
@@ -1506,6 +1506,7 @@
 CONFIG_HVC_XEN_FRONTEND=y
 CONFIG_HVC_XEN=y
 CONFIG_HW_CONSOLE=y
+CONFIG_HWLAT_DETECTOR=m
 CONFIG_HWMON_VID=m
 CONFIG_HWMON=y
 CONFIG_HWPOISON_INJECT=m
@@ -1660,11 +1661,6 @@
 CONFIG_INFINIBAND_USNIC=m
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_INITRAMFS_SOURCE=""
-CONFIG_INLINE_READ_UNLOCK_IRQ=y
-CONFIG_INLINE_READ_UNLOCK=y
-CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
-CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
-CONFIG_INLINE_WRITE_UNLOCK=y
 CONFIG_INOTIFY_USER=y
 CONFIG_INPUT_APANEL=m
 CONFIG_INPUT_ATI_REMOTE2=m
@@ -2006,7 +2002,6 @@
 CONFIG_JOYSTICK_XPAD_LEDS=y
 CONFIG_JOYSTICK_XPAD=m
 CONFIG_JOYSTICK_ZHENHUA=m
-CONFIG_JUMP_LABEL=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_KALLSYMS=y
 CONFIG_KARMA_PARTITION=y
@@ -2113,7 +2108,6 @@
 CONFIG_LOCKDEP_SUPPORT=y
 CONFIG_LOCKD=m
 CONFIG_LOCKD_V4=y
-CONFIG_LOCK_SPIN_ON_OWNER=y
 CONFIG_LOCKUP_DETECTOR=y
 CONFIG_LOG_BUF_SHIFT=18
 CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
@@ -2282,6 +2276,7 @@
 CONFIG_MISDN_NETJET=m
 CONFIG_MISDN_SPEEDFAX=m
 CONFIG_MISDN_W6692=m
+CONFIG_MISSED_TIMER_OFFSETS_HIST=y
 CONFIG_MKISS=m
 CONFIG_MLX4_CORE=m
 CONFIG_MLX4_DEBUG=y
@@ -2374,7 +2369,6 @@
 CONFIG_MTRR_SANITIZER=y
 CONFIG_MTRR=y
 CONFIG_MULTIUSER=y
-CONFIG_MUTEX_SPIN_ON_OWNER=y
 CONFIG_MVMDIO=m
 CONFIG_MWAVE=m
 CONFIG_MWIFIEX=m
@@ -2880,12 +2874,9 @@
 CONFIG_OPENVSWITCH_GRE=m
 CONFIG_OPENVSWITCH=m
 CONFIG_OPENVSWITCH_VXLAN=m
-CONFIG_OPROFILE_EVENT_MULTIPLEX=y
-CONFIG_OPROFILE=m
 CONFIG_OPROFILE_NMI_TIMER=y
 CONFIG_OPT3001=m
 CONFIG_OPTIMIZE_INLINING=y
-CONFIG_OPTPROBES=y
 CONFIG_ORE=m
 CONFIG_ORINOCO_USB=m
 CONFIG_OSF_PARTITION=y
@@ -3054,8 +3045,13 @@
 CONFIG_PPS_CLIENT_PARPORT=m
 CONFIG_PPS=m
 CONFIG_PPTP=m
+CONFIG_PREEMPT_COUNT=y
+CONFIG_PREEMPT_LAZY=y
 CONFIG_PREEMPT_NOTIFIERS=y
-CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_PREEMPT_RCU=y
+CONFIG_PREEMPT_RT_BASE=y
+CONFIG_PREEMPT_RT_FULL=y
+CONFIG_PREEMPT=y
 CONFIG_PREVENT_FIRMWARE_BUILD=y
 CONFIG_PRINTER=m
 CONFIG_PRINTK_TIME=y
@@ -3156,7 +3152,6 @@
 CONFIG_RFKILL_LEDS=y
 CONFIG_RFKILL=m
 CONFIG_RFS_ACCEL=y
-CONFIG_RING_BUFFER_ALLOW_SWAP=y
 CONFIG_RING_BUFFER_BENCHMARK=m
 CONFIG_RING_BUFFER=y
 CONFIG_ROCKER=m
@@ -3286,8 +3281,7 @@
 CONFIG_RTLWIFI_PCI=m
 CONFIG_RTLWIFI_USB=m
 CONFIG_RT_MUTEXES=y
-CONFIG_RWSEM_SPIN_ON_OWNER=y
-CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_S2IO=m
 CONFIG_SAMSUNG_LAPTOP=m
 CONFIG_SAMSUNG_Q10=m
@@ -3622,7 +3616,6 @@
 CONFIG_SLIP_COMPRESSED=y
 CONFIG_SLIP=m
 CONFIG_SLIP_SMART=y
-CONFIG_SLUB_CPU_PARTIAL=y
 CONFIG_SLUB_DEBUG=y
 CONFIG_SLUB=y
 CONFIG_SMARTJOYPLUS_FF=y
@@ -4067,9 +4060,6 @@
 CONFIG_TRACER_SNAPSHOT=y
 CONFIG_TRACING_SUPPORT=y
 CONFIG_TRACING=y
-CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
-CONFIG_TRANSPARENT_HUGEPAGE=y
-CONFIG_TREE_RCU=y
 CONFIG_TRUSTED_KEYS=m
 CONFIG_TTPCI_EEPROM=m
 CONFIG_TTY=y
@@ -4531,6 +4521,7 @@
 CONFIG_W83627HF_WDT=m
 CONFIG_W83877F_WDT=m
 CONFIG_W83977F_WDT=m
+CONFIG_WAKEUP_LATENCY_HIST=y
 CONFIG_WANT_DEV_COREDUMP=y
 CONFIG_WATCHDOG_CORE=y
 CONFIG_WATCHDOG=y
@@ -4594,7 +4585,6 @@
 CONFIG_X86_PMEM_LEGACY_DEVICE=y
 CONFIG_X86_PMEM_LEGACY=y
 CONFIG_X86_PM_TIMER=y
-CONFIG_X86_POWERNOW_K8=m
 CONFIG_X86_PTDUMP_CORE=y
 CONFIG_X86_PTDUMP=y
 CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y