Refactor the benchmark code.
Changes:
- Modify the benchmarks to derive from a single Benchmark object.
- Rewrite the main iteration code. This includes changing the iteration
code to use the actual total time calculated by the benchmark as a basis
for determining whether there are enough iterations instead of using
the time it takes to run the benchmark.
- Allow benchmarks to take no argument, int, or double.
- Fix the PrettyInt printer for negative integers.
- Modify the max column width name to include the whole name including
the arg part.
- Reformat property_benchmark.cpp in line with the rest of the code.
- Modify a few of the math benchmarks to take an argument instead of
separate benchmarks for the same function with different args.
- Create a vector of regex_t structs to represent the args all at
once instead of when running each benchmark.
This change is in preparation for adding new math based benchmarks.
Tested by running on a nexus flo running at max using the new code
and the old code and comparing. All of the numbers are similar, but
some of the iterations are different due to the slightly different
algorithm used.
Change-Id: I57ad1f3ff083282b9ffeb72e687cab369ce3523a
diff --git a/benchmarks/unistd_benchmark.cpp b/benchmarks/unistd_benchmark.cpp
index 94be1dd..09ca0e6 100644
--- a/benchmarks/unistd_benchmark.cpp
+++ b/benchmarks/unistd_benchmark.cpp
@@ -14,12 +14,13 @@
* limitations under the License.
*/
-#include "benchmark.h"
-
#include <sys/syscall.h>
#include <unistd.h>
-static void BM_unistd_getpid(int iters) {
+#include <benchmark/Benchmark.h>
+
+BENCHMARK_NO_ARG(BM_unistd_getpid);
+void BM_unistd_getpid::Run(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
@@ -28,9 +29,9 @@
StopBenchmarkTiming();
}
-BENCHMARK(BM_unistd_getpid);
-static void BM_unistd_getpid_syscall(int iters) {
+BENCHMARK_NO_ARG(BM_unistd_getpid_syscall);
+void BM_unistd_getpid_syscall::Run(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
@@ -39,14 +40,14 @@
StopBenchmarkTiming();
}
-BENCHMARK(BM_unistd_getpid_syscall);
#if defined(__BIONIC__)
// Stop GCC optimizing out our pure function.
/* Must not be static! */ pid_t (*gettid_fp)() = gettid;
-static void BM_unistd_gettid(int iters) {
+BENCHMARK_NO_ARG(BM_unistd_gettid);
+void BM_unistd_gettid::Run(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
@@ -55,11 +56,11 @@
StopBenchmarkTiming();
}
-BENCHMARK(BM_unistd_gettid);
#endif
-static void BM_unistd_gettid_syscall(int iters) {
+BENCHMARK_NO_ARG(BM_unistd_gettid_syscall);
+void BM_unistd_gettid_syscall::Run(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
@@ -68,4 +69,3 @@
StopBenchmarkTiming();
}
-BENCHMARK(BM_unistd_gettid_syscall);