/
environment.go
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/
environment.go
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// Copyright (C) 2014 Space Monkey, Inc.
//
// 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.
package sched
import (
"fmt"
"github.com/spacemonkeygo/spacelog"
)
var (
logger = spacelog.GetLogger()
)
func schedTrace(b []byte, detailed bool, n *int32)
// SchedulerTrace collects the output of the standard scheduler trace debug
// output line
func SchedulerTrace(out []byte, detailed bool) (n int) {
var rv int32
schedTrace(out, detailed, &rv)
return int(rv)
}
// InternalStats represents the data typically displayed in a scheduler trace.
type InternalStats struct {
GoMaxProcs int32
IdleProcs int32
ThreadCount int32
IdleThreads int32
RunQueue int32
}
func schedTraceData(stats *InternalStats) {
var data [256]byte
SchedulerTrace(data[:], false)
var uptime int64
n, err := fmt.Sscanf(string(data[:]),
"SCHED %dms: gomaxprocs=%d idleprocs=%d threads=%d idlethreads=%d "+
"runqueue=%d", &uptime, &stats.GoMaxProcs, &stats.IdleProcs,
&stats.ThreadCount, &stats.IdleThreads, &stats.RunQueue)
if err != nil || n != 6 {
logger.Errorf("failed getting runtime data from scheduler trace: %v, %d",
err, n)
}
}
// RuntimeInternals parses a scheduler trace line into an InternalStats struct
func RuntimeInternals() (rv InternalStats) {
schedTraceData(&rv)
return rv
}