73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"github.com/urfave/cli/v2"
|
|
)
|
|
|
|
var runSimCommand = &cli.Command{
|
|
Name: "run",
|
|
Description: `Run the simulation.
|
|
|
|
Signals:
|
|
- SIGUSR1: Print information about the current simulation (equivalent to 'lotus-sim info').
|
|
- SIGUSR2: Write pprof profiles to ./pprof-simulation-$DATE/`,
|
|
Flags: []cli.Flag{
|
|
&cli.IntFlag{
|
|
Name: "epochs",
|
|
Usage: "Advance the given number of epochs then stop.",
|
|
},
|
|
},
|
|
Action: func(cctx *cli.Context) (err error) {
|
|
node, err := open(cctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if cerr := node.Close(); err == nil {
|
|
err = cerr
|
|
}
|
|
}()
|
|
|
|
go profileOnSignal(cctx, syscall.SIGUSR2)
|
|
|
|
sim, err := node.LoadSim(cctx.Context, cctx.String("simulation"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
targetEpochs := cctx.Int("epochs")
|
|
|
|
ch := make(chan os.Signal, 1)
|
|
signal.Notify(ch, syscall.SIGUSR1)
|
|
defer signal.Stop(ch)
|
|
|
|
for i := 0; targetEpochs == 0 || i < targetEpochs; i++ {
|
|
ts, err := sim.Step(cctx.Context)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
fmt.Fprintf(cctx.App.Writer, "advanced to %d %s\n", ts.Height(), ts.Key())
|
|
|
|
// Print
|
|
select {
|
|
case <-ch:
|
|
fmt.Fprintln(cctx.App.Writer, "---------------------")
|
|
if err := printInfo(cctx.Context, sim, cctx.App.Writer); err != nil {
|
|
fmt.Fprintf(cctx.App.ErrWriter, "ERROR: failed to print info: %s\n", err)
|
|
}
|
|
fmt.Fprintln(cctx.App.Writer, "---------------------")
|
|
case <-cctx.Context.Done():
|
|
return cctx.Err()
|
|
default:
|
|
}
|
|
}
|
|
fmt.Fprintln(cctx.App.Writer, "simulation done")
|
|
return err
|
|
},
|
|
}
|