added overview of the available tests

README.markdown

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+# RT-Tests
+
+This repository contains some programs that test various rt-linux features.
+
+## Available Tests
+
+- backfire        - send a signal from driver to user and measure time intervals
+
+- cyclictest      - ?
+
+- hackbench       - measues the latency of schedulable entities which 
+                    communicate via sockets/pipes
+
+- hwlatdetect     - detect if System Management Interrupts (SMIs) are causing
+                    event latencies in the Linux RT kernel
+
+- pi_tests        - a stress test that is intended to exercise kernel and C
+                    library code paths for POSIX mutexes using the Priority
+                    Inheritance attribute (PTHREAD_PRIO_INHERIT)
+
+- pmqtest         - measures the latency of interprocess communication with
+                    POSIX messages queues
+
+- rt-migrate-test - ?
+
+- signaltest      - ?
+
+- sigwaittest     - measures the latency between sending and receiving a signal
+                    between threads or processes
+
+- svsematest      - measures the latency of SYSV semaphores
+
+
+## Compile
+
+    sudo apt-get install build-essential libluma1 libnuma-dev
+    make