Test program for perf counters

Makefile.am

@@ -55,7 +55,7 @@ ftimings_c_example_SOURCES = \
 ftimings_c_example_LDADD = libftimings-@FTIMINGS_API_VERSION@-@FC@.la
 ftimings_c_example_LINK = $(FCLINK) -static
 
-noinst_PROGRAMS = do_flops do_memory_transfer
+noinst_PROGRAMS = do_flops do_memory_transfer test_perf
 
 do_flops_SOURCES = \
 	examples/do_flops.c
@@ -65,6 +65,10 @@ do_memory_transfer_SOURCES = \
 	examples/do_memory_transfer.c
 do_memory_transfer_CPPFLAGS = -DTEST_DO_MEMORY_TRANSFER
 
+test_perf_SOURCES = \
+	ftimings/perf_memory_counter.c
+test_perf_CPPFLAGS = -DTEST_PERF
+
 # other files to distribute
 filesdir = $(datadir)/@PACKAGE@-@FC@/examples
 files_DATA = examples/example.F90

ftimings/perf_memory_counter.c

@@ -160,6 +160,7 @@ void ftimings_perf_memory_counters(int64_t *reads, int64_t *writes) {
 
 #ifdef TEST_PERF
 
+#include <assert.h>
 #define mebi (1024L * 1024L)
 #define N (512L * mebi / sizeof(int))
 volatile int mem[N];
@@ -168,7 +169,7 @@ int main() {
 	int i, j;
 	int64_t count_reads, count_writes;
 
-	ftimings_perf_memory_counters_init();
+	assert(ftimings_perf_memory_counters_init());
 
 	ftimings_perf_memory_counters(&count_reads, &count_writes);
 	printf("Read %" PRId64 " MiB (%" PRId64 " bytes),\twrote %" PRId64 " MiB (%" PRId64 " bytes) from RAM\n", count_reads / mebi, count_reads, count_writes / mebi, count_writes);