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