testcase: add system performance testcase (#10452)

* add  sys pref frameworks

* add context switch test code

* add irq latency test code

* add  thread sem test code

* add  thread event test code

* add  thread mbox test code

* add  thread mq test code

* Adding a Test Documentation Note

* Modification of text description

1 files changed, 10 insertions, 0 deletions

diff --git a/examples/utest/testcases/perf/SConscript b/examples/utest/testcases/perf/SConscript
new file mode 100644
index 0000000000..c1ac0cff98
--- /dev/null
+++ b/examples/utest/testcases/perf/SConscript
@@ -0,0 +1,10 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = ['UTEST_SYS_PERF_TC'], CPPPATH = CPPPATH)
+
+Return('group')