1 //
2 //
3 // Copyright 2018 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 #include <grpc/support/port_platform.h>
20
21 #include <utility>
22
23 #ifdef GPR_LINUX
24
25 #include <inttypes.h>
26
27 #include <cstdio>
28
29 #include "src/cpp/server/load_reporter/get_cpu_stats.h"
30
31 namespace grpc {
32 namespace load_reporter {
33
GetCpuStatsImpl()34 std::pair<uint64_t, uint64_t> GetCpuStatsImpl() {
35 uint64_t busy = 0, total = 0;
36 FILE* fp;
37 fp = fopen("/proc/stat", "r");
38 uint64_t user, nice, system, idle;
39 if (fscanf(fp, "cpu %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, &user,
40 &nice, &system, &idle) != 4) {
41 // Something bad happened with the information, so assume it's all invalid
42 user = nice = system = idle = 0;
43 }
44 fclose(fp);
45 busy = user + nice + system;
46 total = busy + idle;
47 return std::make_pair(busy, total);
48 }
49
50 } // namespace load_reporter
51 } // namespace grpc
52
53 #endif // GPR_LINUX
54