// NewContext creates a new context that is watching a live task. See Start
// or MonitorGroup.Task
func (t *TaskMonitor) NewContext() *TaskCtx {
t.mtx.Lock()
t.current += 1
t.total_started += 1
if t.current > t.highwater {
t.highwater = t.current
}
t.mtx.Unlock()
return &TaskCtx{start: monotime.Monotonic(), monitor: t}
}
// RegisterEnvironment configures the MonitorStore receiver to understand all
// sorts of process environment statistics, such as memory statistics,
// process uptime, file descriptor use, goroutine use, runtime internals,
// Rusage stats, etc.
func (store *MonitorStore) RegisterEnvironment() {
if store == nil {
store = DefaultStore
}
group := store.GetMonitorsNamed("env")
group.Chain("goroutines", MonitorFunc(
func(cb func(name string, val float64)) {
cb("count", float64(runtime.NumGoroutine()))
}))
group.Chain("memory", MonitorFunc(
func(cb func(name string, val float64)) {
var stats runtime.MemStats
runtime.ReadMemStats(&stats)
MonitorStruct(stats, cb)
}))
process_crc, err := ProcessCRC()
if err != nil {
logger.Errorf("failed determining process crc: %s", err)
process_crc = 0
}
group.Chain("process", MonitorFunc(
func(cb func(name string, val float64)) {
cb("control", 1)
fds, err := FdCount()
if err != nil {
logger.Errorf("failed getting fd count: %s", err)
} else {
cb("fds", float64(fds))
}
cb("crc", float64(process_crc))
cb("uptime", (monotime.Monotonic() - startTime).Seconds())
}))
group.Chain("runtime", MonitorFunc(
func(cb func(name string, val float64)) {
MonitorStruct(RuntimeInternals(), cb)
}))
group.Chain("rusage", MonitorFunc(
func(cb func(name string, val float64)) {
var rusage syscall.Rusage
err := syscall.Getrusage(syscall.RUSAGE_SELF, &rusage)
if err != nil {
logger.Errorf("failed getting rusage data: %s", err)
return
}
MonitorStruct(&rusage, cb)
}))
}
// Finish records a successful task completion. You must pass a pointer to
// the named error return value (or nil if there isn't one) and the result
// of recover() out of the method that was deferred for this to work right.
// Finish will re-panic any recovered panics (provided it wasn't a nil panic)
// after bookkeeping.
func (c *TaskCtx) Finish(err_ref *error, rec interface{}) {
duration_nanoseconds := int64(monotime.Monotonic() - c.start)
var error_name string
var err error
if err_ref != nil {
err = *err_ref
}
if rec != nil {
var ok bool
err, ok = rec.(error)
if !ok || err == nil {
err = errors.PanicError.New("%v", rec)
}
}
if err != nil {
error_name = errors.GetClass(err).String()
max_len := Config.MaxErrorLength
if len(error_name) > max_len {
error_name = error_name[:max_len]
}
error_name = SanitizeName(error_name)
}
// we keep granularity on the order microseconds, which should keep
// sum_squared useful
duration_microseconds := int64(duration_nanoseconds /
microsecondInNanoseconds)
c.monitor.mtx.Lock()
c.monitor.current -= 1
c.monitor.total_completed += 1
if err != nil {
c.monitor.errors[error_name] += 1
if rec != nil {
c.monitor.panics += 1
}
c.monitor.error_timing.Add(duration_microseconds)
} else {
c.monitor.success_timing.Add(duration_microseconds)
c.monitor.success += 1
}
c.monitor.mtx.Unlock()
c.monitor.total_timing.Add(duration_microseconds)
// doh, we didn't actually want to stop the panic codepath.
// we have to repanic. Oh and great, panics can be nil. Welp!
if rec != nil {
panic(rec)
}
}
package monitor
import (
"fmt"
"io"
"os"
"runtime"
"syscall"
"github.com/spacemonkeygo/crc"
"github.com/spacemonkeygo/monotime"
)
var (
startTime = monotime.Monotonic()
)
// RegisterEnvironment configures the MonitorStore receiver to understand all
// sorts of process environment statistics, such as memory statistics,
// process uptime, file descriptor use, goroutine use, runtime internals,
// Rusage stats, etc.
func (store *MonitorStore) RegisterEnvironment() {
if store == nil {
store = DefaultStore
}
group := store.GetMonitorsNamed("env")
group.Chain("goroutines", MonitorFunc(
func(cb func(name string, val float64)) {
cb("count", float64(runtime.NumGoroutine()))
func nowTimestamp() uint32 {
return uint32(monotime.Monotonic() / time.Microsecond)
}
// Elapsed just returns the amount of time since the timer started
func (r *RunningTimer) Elapsed() time.Duration {
return monotime.Monotonic() - r.start
}
// Start constructs a RunningTimer
func (t *Timer) Start() *RunningTimer {
return &RunningTimer{
start: monotime.Monotonic(),
t: t}
}
func (t TaskCtx) ElapsedTime() time.Duration {
return monotime.Monotonic() - t.start
}