go122-syscall-steal-proc-reacquire-new-proc.go

Documentation: golang.org/x/exp/trace/testdata/generators

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Code generated by "gen.bash" from internal/trace/v2; DO NOT EDIT.
     6  
     7  //go:build go1.21
     8  
     9  // Tests syscall P stealing.
    10  
    11  package main
    12  
    13  import (
    14  	"golang.org/x/exp/trace"
    15  	"golang.org/x/exp/trace/internal/event/go122"
    16  	testgen "golang.org/x/exp/trace/internal/testgen/go122"
    17  )
    18  
    19  func main() {
    20  	testgen.Main(gen)
    21  }
    22  
    23  func gen(t *testgen.Trace) {
    24  	g := t.Generation(1)
    25  
    26  	// One goroutine enters a syscall, grabs a P, and starts running.
    27  	b0 := g.Batch(trace.ThreadID(0), 0)
    28  	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcIdle)
    29  	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
    30  	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
    31  	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
    32  	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
    33  	b0.Event("GoSyscallEndBlocked")
    34  
    35  	// A running goroutine steals proc 0.
    36  	b1 := g.Batch(trace.ThreadID(1), 0)
    37  	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)
    38  	b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), go122.GoRunning)
    39  	b1.Event("ProcSteal", trace.ProcID(0), testgen.Seq(2), trace.ThreadID(0))
    40  }
    41
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