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// +build !appengine | ||
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/* | ||
* | ||
* Copyright 2018 gRPC authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
* | ||
*/ | ||
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package syscall | ||
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import ( | ||
"syscall" | ||
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"golang.org/x/sys/unix" | ||
"google.golang.org/grpc/grpclog" | ||
) | ||
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// GetCPUTime returns the how much CPU time has passed since the start of this process. | ||
func GetCPUTime() int64 { | ||
var ts unix.Timespec | ||
if err := unix.ClockGettime(unix.CLOCK_PROCESS_CPUTIME_ID, &ts); err != nil { | ||
grpclog.Fatal(err) | ||
} | ||
return ts.Nano() | ||
} | ||
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// Rusage is an alias for syscall.Rusage under linux non-appengine environment. | ||
type Rusage syscall.Rusage | ||
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// GetRusage returns the resource usage of current process. | ||
func GetRusage() (rusage *Rusage) { | ||
rusage = new(Rusage) | ||
syscall.Getrusage(syscall.RUSAGE_SELF, (*syscall.Rusage)(rusage)) | ||
return | ||
} | ||
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// CPUTimeDiff returns the differences of user CPU time and system CPU time used | ||
// between two Rusage structs. | ||
func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) { | ||
f := (*syscall.Rusage)(first) | ||
l := (*syscall.Rusage)(latest) | ||
var ( | ||
utimeDiffs = l.Utime.Sec - f.Utime.Sec | ||
utimeDiffus = l.Utime.Usec - f.Utime.Usec | ||
stimeDiffs = l.Stime.Sec - f.Stime.Sec | ||
stimeDiffus = l.Stime.Usec - f.Stime.Usec | ||
) | ||
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uTimeElapsed := float64(utimeDiffs) + float64(utimeDiffus)*1.0e-6 | ||
sTimeElapsed := float64(stimeDiffs) + float64(stimeDiffus)*1.0e-6 | ||
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return uTimeElapsed, sTimeElapsed | ||
} |
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// +build !linux appengine | ||
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/* | ||
* | ||
* Copyright 2018 gRPC authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
* | ||
*/ | ||
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package syscall | ||
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import "google.golang.org/grpc/grpclog" | ||
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func init() { | ||
grpclog.Info("CPU time info is unavailable on non-linux or appengine environment.") | ||
} | ||
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// GetCPUTime returns the how much CPU time has passed since the start of this process. | ||
// It always returns 0 under non-linux or appengine environment. | ||
func GetCPUTime() int64 { | ||
return 0 | ||
} | ||
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// Rusage is an empty struct under non-linux or appengine environment. | ||
type Rusage struct{} | ||
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// GetRusage is a no-op function under non-linux or appengine environment. | ||
func GetRusage() (rusage *Rusage) { | ||
return nil | ||
} | ||
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// CPUTimeDiff returns the differences of user CPU time and system CPU time used | ||
// between two Rusage structs. It a no-op function for non-linux or appengine environment. | ||
func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) { | ||
return 0, 0 | ||
} |