github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/platform/systrap/systrap_profiling.go (about)

     1  // Copyright 2023 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build systrap_profiling
    16  // +build systrap_profiling
    17  
    18  package systrap
    19  
    20  import (
    21  	"github.com/metacubex/gvisor/pkg/metric"
    22  )
    23  
    24  // SystrapProfiling is a builder that produces conditionally compiled metrics.
    25  // Metrics made from this are compiled and active at runtime when the
    26  // "systrap_profiling" go-tag is specified at compilation.
    27  var SystrapProfiling = metric.RealMetricBuilder{}
    28  
    29  //go:nosplit
    30  func updateDebugMetrics(stubBoundLat, sentryBoundLat cpuTicks) {
    31  	if stubBoundLat == 0 {
    32  	} else if stubBoundLat < 2000 {
    33  		stubLatWithin1kUS.Increment()
    34  	} else if stubBoundLat < 10000 {
    35  		stubLatWithin5kUS.Increment()
    36  	} else if stubBoundLat < 20000 {
    37  		stubLatWithin10kUS.Increment()
    38  	} else if stubBoundLat < 40000 {
    39  		stubLatWithin20kUS.Increment()
    40  	} else if stubBoundLat < 80000 {
    41  		stubLatWithin40kUS.Increment()
    42  	} else {
    43  		stubLatGreater40kUS.Increment()
    44  	}
    45  
    46  	if sentryBoundLat == 0 {
    47  	} else if sentryBoundLat < 2000 {
    48  		sentryLatWithin1kUS.Increment()
    49  	} else if sentryBoundLat < 10000 {
    50  		sentryLatWithin5kUS.Increment()
    51  	} else if sentryBoundLat < 20000 {
    52  		sentryLatWithin10kUS.Increment()
    53  	} else if sentryBoundLat < 40000 {
    54  		sentryLatWithin20kUS.Increment()
    55  	} else if sentryBoundLat < 80000 {
    56  		sentryLatWithin40kUS.Increment()
    57  	} else {
    58  		sentryLatGreater40kUS.Increment()
    59  	}
    60  }