From 7634db5a0657129225869c3650a992f9cbe82fe4 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Mon, 9 Jun 2014 18:35:21 -0700
Subject: [PATCH] Add a couple more system call benchmarks.

Bug: 15387103
Change-Id: I13419ddf77d201fdbde4c784259c0cb0dcfb9a77
---
 benchmarks/time_benchmark.cpp   | 13 +++++++++++++
 benchmarks/unistd_benchmark.cpp | 12 ++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/benchmarks/time_benchmark.cpp b/benchmarks/time_benchmark.cpp
index 75132e50e..3bf8c07f6 100644
--- a/benchmarks/time_benchmark.cpp
+++ b/benchmarks/time_benchmark.cpp
@@ -35,4 +35,17 @@ static void BM_time_localtime_tz(int iters) {
   StopBenchmarkTiming();
 }
 BENCHMARK(BM_time_localtime_tz);
+
 #endif
+
+static void BM_time_clock_gettime(int iters) {
+  StartBenchmarkTiming();
+
+  struct timespec t;
+  for (int i = 0; i < iters; ++i) {
+    clock_gettime(CLOCK_MONOTONIC, &t);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_time_clock_gettime);
diff --git a/benchmarks/unistd_benchmark.cpp b/benchmarks/unistd_benchmark.cpp
index 12b788acd..f2c9d73cf 100644
--- a/benchmarks/unistd_benchmark.cpp
+++ b/benchmarks/unistd_benchmark.cpp
@@ -16,6 +16,7 @@
 
 #include "benchmark.h"
 
+#include <sys/syscall.h>
 #include <unistd.h>
 
 static void BM_unistd_getpid(int iters) {
@@ -39,3 +40,14 @@ static void BM_unistd_gettid(int iters) {
   StopBenchmarkTiming();
 }
 BENCHMARK(BM_unistd_gettid);
+
+static void BM_unistd_gettid_syscall(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    syscall(__NR_gettid);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_unistd_gettid_syscall);