diff --git a/configs/ez80f910200kitg/ostest/defconfig b/configs/ez80f910200kitg/ostest/defconfig
index 67f08b8755e8a7c63efd86fdb31b41e334a92720..68b31cf1fca13512be16d7a10049095c8b116819 100644
--- a/configs/ez80f910200kitg/ostest/defconfig
+++ b/configs/ez80f910200kitg/ostest/defconfig
@@ -593,7 +593,7 @@ CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
 #
 # Settings for examples/ostest
 CONFIG_EXAMPLES_OSTEST_LOOPS=1
-CONFIG_EXAMPLES_OSTEST_STACKSIZE=256
+CONFIG_EXAMPLES_OSTEST_STACKSIZE=2048
 CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS=3
 
 #
diff --git a/configs/ez80f910200zco/nettest/defconfig b/configs/ez80f910200zco/nettest/defconfig
index 52ca534a2685b7087cb962bfc2133df139e28968..d27ddf73807c79f54448e74db14e7f1abdf985e4 100644
--- a/configs/ez80f910200zco/nettest/defconfig
+++ b/configs/ez80f910200zco/nettest/defconfig
@@ -593,7 +593,7 @@ CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
 #
 # Settings for examples/ostest
 CONFIG_EXAMPLES_OSTEST_LOOPS=1
-CONFIG_EXAMPLES_OSTEST_STACKSIZE=256
+CONFIG_EXAMPLES_OSTEST_STACKSIZE=2048
 CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS=3
 
 #
diff --git a/configs/ez80f910200zco/ostest/defconfig b/configs/ez80f910200zco/ostest/defconfig
index 7e218d105af74465a618c4f905589f5e2c4f5eff..35c7bd9e21e8c75901ba1144f28f131c1d2d632c 100644
--- a/configs/ez80f910200zco/ostest/defconfig
+++ b/configs/ez80f910200zco/ostest/defconfig
@@ -202,12 +202,12 @@ CONFIG_DEBUG=y
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_MM_REGIONS=1
 CONFIG_ARCH_LOWPUTC=y
-CONFIG_RR_INTERVAL=0
+CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
 CONFIG_START_YEAR=2009
 CONFIG_START_MONTH=2
-CONFIG_START_DAY=25
+CONFIG_START_DAY=28
 CONFIG_JULIAN_TIME=n
 CONFIG_HAVE_LOWUARTINIT=y
 CONFIG_DEV_CONSOLE=y
@@ -228,13 +228,13 @@ CONFIG_DEV_LOWCONSOLE=y
 # o pthread_condtimedwait() depends on signals to wake
 #   up waiting tasks.
 #
-CONFIG_DISABLE_CLOCK=y
-CONFIG_DISABLE_POSIX_TIMERS=y
-CONFIG_DISABLE_PTHREAD=y
-CONFIG_DISABLE_SIGNALS=y
-CONFIG_DISABLE_MQUEUE=y
-CONFIG_DISABLE_MOUNTPOINT=y
-CONFIG_DISABLE_ENVIRON=y
+CONFIG_DISABLE_CLOCK=n
+CONFIG_DISABLE_POSIX_TIMERS=n
+CONFIG_DISABLE_PTHREAD=n
+CONFIG_DISABLE_SIGNALS=n
+CONFIG_DISABLE_MQUEUE=n
+CONFIG_DISABLE_MOUNTPOINT=n
+CONFIG_DISABLE_ENVIRON=n
 CONFIG_DISABLE_POLL=y
 
 #
@@ -299,19 +299,19 @@ CONFIG_ARCH_KFREE=n
 #   timer structures to minimize dynamic allocations.  Set to
 #   zero for all dynamic allocations.
 #
-CONFIG_MAX_TASKS=8
+CONFIG_MAX_TASKS=16
 CONFIG_MAX_TASK_ARGS=4
-CONFIG_NPTHREAD_KEYS=0
+CONFIG_NPTHREAD_KEYS=4
 CONFIG_NFILE_DESCRIPTORS=8
 CONFIG_NFILE_STREAMS=8
 CONFIG_NAME_MAX=32
-CONFIG_STDIO_BUFFER_SIZE=0
-CONFIG_NUNGET_CHARS=0
-CONFIG_PREALLOC_MQ_MSGS=0
-CONFIG_MQ_MAXMSGSIZE=0
+CONFIG_STDIO_BUFFER_SIZE=256
+CONFIG_NUNGET_CHARS=2
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_MQ_MAXMSGSIZE=32
 CONFIG_MAX_WDOGPARMS=2
 CONFIG_PREALLOC_WDOGS=4
-CONFIG_PREALLOC_TIMERS=0
+CONFIG_PREALLOC_TIMERS=4
 
 #
 # Framebuffer driver options
@@ -593,7 +593,7 @@ CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
 #
 # Settings for examples/ostest
 CONFIG_EXAMPLES_OSTEST_LOOPS=1
-CONFIG_EXAMPLES_OSTEST_STACKSIZE=256
+CONFIG_EXAMPLES_OSTEST_STACKSIZE=2048
 CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS=3
 
 #