Add musl benchmarks.

Test: Unit tests.
Change-Id: Ifb2911825f84b95fe64a803bfabd32fb81210eae

1 files changed, 27 insertions, 2 deletions

diff --git a/benchmarks/stdio_benchmark.cpp b/benchmarks/stdio_benchmark.cpp
index 756a698bb..a1ca60e8a 100644
--- a/benchmarks/stdio_benchmark.cpp
+++ b/benchmarks/stdio_benchmark.cpp
@@ -63,9 +63,10 @@ void BM_stdio_fwrite_unbuffered(benchmark::State& state) {
 BIONIC_BENCHMARK(BM_stdio_fwrite_unbuffered);
 
 static void FopenFgetsFclose(benchmark::State& state, bool no_locking) {
-  char buf[1024];
+  size_t nbytes = state.range(0);
+  char buf[nbytes];
   while (state.KeepRunning()) {
-    FILE* fp = fopen("/proc/version", "re");
+    FILE* fp = fopen("/dev/zero", "re");
     if (no_locking) __fsetlocking(fp, FSETLOCKING_BYCALLER);
     if (fgets(buf, sizeof(buf), fp) == nullptr) abort();
     fclose(fp);
@@ -81,3 +82,27 @@ void BM_stdio_fopen_fgets_fclose_no_locking(benchmark::State& state) {
   FopenFgetsFclose(state, true);
 }
 BIONIC_BENCHMARK(BM_stdio_fopen_fgets_fclose_no_locking);
+
+static void FopenFgetcFclose(benchmark::State& state, bool no_locking) {
+  size_t nbytes = state.range(0);
+  while (state.KeepRunning()) {
+    FILE* fp = fopen("/dev/zero", "re");
+    if (no_locking) __fsetlocking(fp, FSETLOCKING_BYCALLER);
+    volatile int c __attribute__((unused));
+    for (size_t i = 0; i < nbytes; ++i) {
+      c = fgetc(fp);
+    }
+    fclose(fp);
+  }
+}
+
+static void BM_stdio_fopen_fgetc_fclose_locking(benchmark::State& state) {
+  FopenFgetcFclose(state, false);
+}
+BIONIC_BENCHMARK(BM_stdio_fopen_fgetc_fclose_locking);
+
+void BM_stdio_fopen_fgetc_fclose_no_locking(benchmark::State& state) {
+  FopenFgetcFclose(state, true);
+}
+BIONIC_BENCHMARK(BM_stdio_fopen_fgetc_fclose_no_locking);
+