uncachedev: uncache test tool.

This adds the uncache test tool (bin/uncache.c). The tool
can be used to test Litmus's char device driver for allocating
uncacheable CPU memory. The tool runs various checks and
gathers basic cache vs. main memory statistics.

In the future, uncache could be extended to quantify the
benefits of the L1, L2, and L3 caches, instead of treating
them as a black box.

Note: Uncache works best when compiled with '-O2'.  While '-O2'
has not been added to the Makefile, other code was updated (code
in tests/ and rtspin), to compile with -O2.

DEPENDS UPON LITMUS-RT PATCH 888d097deb6d1fdc0c89a4f9667fd81cf416cfc7.

1 files changed, 4 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 8195752..5432edd 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,7 @@ AR  := ${CROSS_COMPILE}${AR}
 
 all     = lib ${rt-apps}
 rt-apps = cycles base_task rt_launch rtspin release_ts measure_syscall \
-          base_mt_task runtests
+          base_mt_task uncache runtests
 
 .PHONY: all lib clean dump-config TAGS tags cscope help
 
@@ -215,6 +215,9 @@ obj-rt_launch = rt_launch.o common.o
 obj-rtspin = rtspin.o common.o
 lib-rtspin = -lrt
 
+obj-uncache = uncache.o
+lib-uncache = -lrt
+
 obj-release_ts = release_ts.o
 
 obj-measure_syscall = null_call.o