Major update for ECRTS'25: fix TPC to GPU mapping and add a "supreme" mask

These updates are featured in the paper:

J. Bakita and J. H. Anderson, “Hardware Compute Partitioning on
NVIDIA GPUs for Composable Systems”, Proceedings of the 37th
Euromicro Conference on Real-Time Systems (ECRTS), to appear,
Jul 2025.

They:
1. Fix reported GPC to TPC mappings (requires nvdebug update).
2. Add support for a "supreme" mask, which overrides all others and
   can be set on a per-process basis via an environment variable,
   and optionally modified at runtime via the nvtaskset utility.
3. Add test for the supreme mask.

1 files changed, 17 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index 5256634..62ec245 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,9 @@ libsmctrl.a: libsmctrl.c libsmctrl.h
 
 # ----- Utilities -----
 # Use static linking with tests to avoid LD_LIBRARY_PATH issues
+nvtaskset: nvtaskset.c libsmctrl.so libsmctrl.a
+        $(CC) $@.c -o $@ -L. -l:libsmctrl.a $(CFLAGS) $(LDFLAGS)
+
 libsmctrl_test_gpc_info: libsmctrl_test_gpc_info.c libsmctrl.a testbench.h
         $(CC) $< -o $@ -g -L. -l:libsmctrl.a $(CFLAGS) $(LDFLAGS)
 
@@ -26,6 +29,9 @@ libsmctrl_test_gpc_info: libsmctrl_test_gpc_info.c libsmctrl.a testbench.h
 libsmctrl_test_mask_shared.o: libsmctrl_test_mask_shared.cu testbench.h
         $(NVCC) -ccbin $(CXX) $< -c -g
 
+libsmctrl_test_supreme_mask: libsmctrl_test_supreme_mask.c libsmctrl.a libsmctrl_test_mask_shared.o
+        $(NVCC) -ccbin $(CXX) $@.c -o $@ libsmctrl_test_mask_shared.o -g -L. -l:libsmctrl.a $(LDFLAGS)
+
 libsmctrl_test_global_mask: libsmctrl_test_global_mask.c libsmctrl.a libsmctrl_test_mask_shared.o
         $(NVCC) -ccbin $(CXX) $@.c -o $@ libsmctrl_test_mask_shared.o -g -L. -l:libsmctrl.a $(LDFLAGS)
 
@@ -41,12 +47,17 @@ libsmctrl_test_next_mask: libsmctrl_test_next_mask.c libsmctrl.a libsmctrl_test_
 libsmctrl_test_next_mask_override: libsmctrl_test_next_mask_override.c libsmctrl.a libsmctrl_test_mask_shared.o
         $(NVCC) -ccbin $(CXX) $@.c -o $@ libsmctrl_test_mask_shared.o -g -L. -l:libsmctrl.a $(LDFLAGS)
 
-tests: libsmctrl_test_gpc_info libsmctrl_test_global_mask libsmctrl_test_stream_mask libsmctrl_test_stream_mask_override libsmctrl_test_next_mask libsmctrl_test_next_mask_override
+tests: libsmctrl_test_gpc_info libsmctrl_test_supreme_mask \
+       libsmctrl_test_global_mask libsmctrl_test_stream_mask \
+       libsmctrl_test_stream_mask_override libsmctrl_test_next_mask \
+       libsmctrl_test_next_mask_override
 
-all: libsmctrl.so tests
+all: libsmctrl.so nvtaskset tests
 
 clean:
-        rm -f libsmctrl.so libsmctrl.a libsmctrl_test_gpu_info \
-              libsmctrl_test_mask_shared.o libmsctrl_test_global_mask \
-              libsmctrl_test_stream_mask libmsctrl_test_stream_mask_override \
-              libsmctrl_test_next_mask libmsctrl_test_next_mask_override
+        rm -f libsmctrl.so libsmctrl.o libsmctrl.a libsmctrl_test_gpc_info \
+              libsmctrl_test_mask_shared.o libsmctrl_test_supreme_mask \
+              libsmctrl_test_global_mask \
+              libsmctrl_test_stream_mask libsmctrl_test_stream_mask_override \
+              libsmctrl_test_next_mask libsmctrl_test_next_mask_override \
+              nvtaskset