gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/test/metricsviz/metricsviz_cli/metricsviz_cli.go (about)

     1  // Copyright 2024 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  // metricsviz_cli visualizes metrics from profiling metrics logs.
    16  package main
    17  
    18  import (
    19  	"context"
    20  	"fmt"
    21  	"os"
    22  
    23  	"gvisor.dev/gvisor/test/metricsviz"
    24  )
    25  
    26  func main() {
    27  	ctx := context.Background()
    28  	if len(os.Args) < 2 {
    29  		fmt.Fprintf(os.Stderr, "Usage: %s /path/to/profiling_metrics.log\n", os.Args[0])
    30  		os.Exit(2)
    31  	}
    32  	for _, arg := range os.Args[1:] {
    33  		if err := metricsviz.FromFile(ctx, arg, func(format string, args ...any) {
    34  			fmt.Fprintf(os.Stdout, format+"\n", args...)
    35  		}); err != nil {
    36  			fmt.Fprintln(os.Stderr, err)
    37  			os.Exit(1)
    38  		}
    39  	}
    40  }