Merge branch 'master' of github.com:grpc/grpc into rr_fixall

1 files changed, 32 insertions, 1 deletions

diff --git a/test/cpp/qps/usage_timer.cc b/test/cpp/qps/usage_timer.cc
index ff595b2ba0..c6697fbdfd 100644
--- a/test/cpp/qps/usage_timer.cc
+++ b/test/cpp/qps/usage_timer.cc
@@ -33,10 +33,14 @@
 
 #include "test/cpp/qps/usage_timer.h"
 
+#include <fstream>
+#include <sstream>
+#include <string>
+
+#include <grpc/support/log.h>
 #include <grpc/support/time.h>
 #include <sys/resource.h>
 #include <sys/time.h>
-
 UsageTimer::UsageTimer() : start_(Sample()) {}
 
 double UsageTimer::Now() {
@@ -48,6 +52,27 @@ static double time_double(struct timeval* tv) {
   return tv->tv_sec + 1e-6 * tv->tv_usec;
 }
 
+static void get_cpu_usage(unsigned long long* total_cpu_time,
+                          unsigned long long* idle_cpu_time) {
+#ifdef __linux__
+  std::ifstream proc_stat("/proc/stat");
+  proc_stat.ignore(5);
+  std::string cpu_time_str;
+  std::string first_line;
+  std::getline(proc_stat, first_line);
+  std::stringstream first_line_s(first_line);
+  for (int i = 0; i < 10; ++i) {
+    std::getline(first_line_s, cpu_time_str, ' ');
+    *total_cpu_time += std::stol(cpu_time_str);
+    if (i == 3) {
+      *idle_cpu_time = std::stol(cpu_time_str);
+    }
+  }
+#else
+  gpr_log(GPR_INFO, "get_cpu_usage(): Non-linux platform is not supported.");
+#endif
+}
+
 UsageTimer::Result UsageTimer::Sample() {
   struct rusage usage;
   struct timeval tv;
@@ -58,6 +83,9 @@ UsageTimer::Result UsageTimer::Sample() {
   r.wall = time_double(&tv);
   r.user = time_double(&usage.ru_utime);
   r.system = time_double(&usage.ru_stime);
+  r.total_cpu_time = 0;
+  r.idle_cpu_time = 0;
+  get_cpu_usage(&r.total_cpu_time, &r.idle_cpu_time);
   return r;
 }
 
@@ -67,5 +95,8 @@ UsageTimer::Result UsageTimer::Mark() const {
   r.wall = s.wall - start_.wall;
   r.user = s.user - start_.user;
   r.system = s.system - start_.system;
+  r.total_cpu_time = s.total_cpu_time - start_.total_cpu_time;
+  r.idle_cpu_time = s.idle_cpu_time - start_.idle_cpu_time;
+
   return r;
 }