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tests: benchmark: use cpu-bound workload, calculate average and std.dev.
[lttng-ust.git]
/
tests
/
benchmark
/
bench.c
diff --git
a/tests/benchmark/bench.c
b/tests/benchmark/bench.c
index 517bfb73078db7b74769b00f81143576dd723000..77f53a1532f9a977d149acde14c95974be0a2889 100644
(file)
--- a/
tests/benchmark/bench.c
+++ b/
tests/benchmark/bench.c
@@
-27,6
+27,7
@@
#include <unistd.h>
#include <sched.h>
#include <time.h>
#include <unistd.h>
#include <sched.h>
#include <time.h>
+#include <urcu/compiler.h>
#ifdef TRACING
#define TRACEPOINT_DEFINE
#ifdef TRACING
#define TRACEPOINT_DEFINE
@@
-38,28
+39,23
@@
static unsigned long nr_events;
void do_stuff(void)
{
void do_stuff(void)
{
- int v;
- FILE *file;
-
- v = 1;
-
- file = fopen("/dev/null", "a");
- fprintf(file, "%d", v);
- fclose(file);
- time(NULL);
+ int i;
+#ifdef TRACING
+ int v = 50;
+#endif
+ for (i = 0; i < 100; i++)
+ cmm_barrier();
#ifdef TRACING
tracepoint(ust_tests_benchmark, tpbench, v);
#endif
#ifdef TRACING
tracepoint(ust_tests_benchmark, tpbench, v);
#endif
-
}
}
-
void *function(void *arg)
{
unsigned long i;
void *function(void *arg)
{
unsigned long i;
- for(i = 0; i < nr_events; i++) {
+ for
(i = 0; i < nr_events; i++) {
do_stuff();
}
return NULL;
do_stuff();
}
return NULL;
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