diff --git a/cmd/lotus-sim/info.go b/cmd/lotus-sim/info.go
index 82e531015..ef20b7f26 100644
--- a/cmd/lotus-sim/info.go
+++ b/cmd/lotus-sim/info.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"syscall"
 	"text/tabwriter"
 	"time"
 
@@ -229,6 +230,8 @@ var infoCommitGasSimCommand = &cli.Command{
 		}
 		defer node.Close()
 
+		go profileOnSignal(cctx, syscall.SIGUSR2)
+
 		sim, err := node.LoadSim(cctx.Context, cctx.String("simulation"))
 		if err != nil {
 			return err