xref: /aosp_15_r20/external/grpc-grpc/test/cpp/qps/usage_timer.h (revision cc02d7e222339f7a4f6ba5f422e6413f4bd931f2)
1 //
2 //
3 // Copyright 2015 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 //     http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18 
19 #ifndef GRPC_TEST_CPP_QPS_USAGE_TIMER_H
20 #define GRPC_TEST_CPP_QPS_USAGE_TIMER_H
21 
22 class UsageTimer {
23  public:
24   UsageTimer();
25 
26   struct Result {
27     double wall;
28     double user;
29     double system;
30     unsigned long long total_cpu_time;
31     unsigned long long idle_cpu_time;
32   };
33 
34   Result Mark() const;
35 
36   static double Now();
37 
38  private:
39   static Result Sample();
40 
41   const Result start_;
42 };
43 
44 #endif  // GRPC_TEST_CPP_QPS_USAGE_TIMER_H
45