diff --git a/src/infuse_iot/rpc_wrappers/thread_stats.py b/src/infuse_iot/rpc_wrappers/thread_stats.py
index feb6cf4..c4b8d4a 100644
--- a/src/infuse_iot/rpc_wrappers/thread_stats.py
+++ b/src/infuse_iot/rpc_wrappers/thread_stats.py
@@ -15,7 +15,8 @@ class thread_stats(InfuseRpcCommand, defs.thread_stats):
     @classmethod
     def add_parser(cls, parser):
         sort = parser.add_mutually_exclusive_group()
-        sort.add_argument("--sort-stack", action="store_true", help="Sort threads by stack usage (%)")
+        sort.add_argument("--sort-percentage", action="store_true", help="Sort threads by stack usage (%)")
+        sort.add_argument("--sort-bytes", action="store_true", help="Sort threads by bytes bytes")
 
     def __init__(self, args):
         self.args = args
@@ -36,18 +37,22 @@ def data_recv_cb(self, offset: int, data: bytes) -> None:
             name = data[:name_len].decode()
             data = data[name_len:]
             percent = int(100 * base.stack_used / base.stack_size)
-            self._info.append((name, base.stack_used, base.stack_size, percent, base.utilization))
+            unused = base.stack_size - base.stack_used
+            self._info.append((name, base.stack_used, unused, base.stack_size, percent, base.utilization))
 
     def handle_response(self, return_code, response):
         if return_code != 0:
             print(f"Failed to query thread stats ({errno.strerror(-return_code)})")
             return
 
-        if self.args.sort_stack:
-            # Sort by stack usage
-            display = sorted(self._info, key=lambda x: x[3], reverse=True)
+        if self.args.sort_percentage:
+            # Sort by stack usage percent
+            display = sorted(self._info, key=lambda x: x[4], reverse=True)
+        elif self.args.sort_bytes:
+            # Sort by stack bytes free
+            display = sorted(self._info, key=lambda x: x[2], reverse=True)
         else:
             display = self._info
 
-        headings = ["Thread", "Stack Used", "Stack Size", "Stack %", "CPU %"]
+        headings = ["Thread", "Stack Used", "Stack Free", "Stack Size", "Stack %", "CPU %"]
         print(tabulate.tabulate(display, headers=headings))
diff --git a/src/infuse_iot/tools/csv_plot.py b/src/infuse_iot/tools/csv_plot.py
index 9f95f6a..199dcc3 100644
--- a/src/infuse_iot/tools/csv_plot.py
+++ b/src/infuse_iot/tools/csv_plot.py
@@ -16,31 +16,56 @@ class SubCommand(InfuseCommand):
 
     @classmethod
     def add_parser(cls, parser):
-        parser.add_argument("--file", "-f", required=True, type=ValidFile)
+        parser.add_argument(
+            "--files",
+            "-f",
+            required=True,
+            type=ValidFile,
+            nargs="+",
+        )
         parser.add_argument("--start", type=str, default="2024-01-01", help="Display data after")
+        parser.add_argument("--field", type=str, help="Single column to plot")
+        parser.add_argument("--group", action="store_true", help="Group all lines onto a single plot")
 
     def __init__(self, args):
-        self.file = args.file
+        self.files = args.files
+        self.field = args.field
         self.start = args.start
+        self.group = args.group
 
     def run(self):
         import pandas as pd
         import plotly.express as px
+        import plotly.graph_objects as go
         from dash import Dash, dcc, html
 
-        df = pd.read_csv(self.file)
+        fig: None | go.Figure = None
+        figures: list[dcc.Graph] = []
+        if self.group:
+            fig = go.Figure()
 
-        mask = df["time"] >= self.start
-        filtered_df = df.loc[mask]
+        for file in self.files:
+            df = pd.read_csv(file)
 
-        fig = px.line(
-            filtered_df,
-            x="time",
-            y=filtered_df.columns.values[1:],
-            title=str(self.file),
-        )
+            mask = df["time"] >= self.start
+            filtered_df = df.loc[mask]
+
+            y_data = filtered_df[self.field] if self.field else filtered_df.columns.values[1:]
+            if self.group:
+                assert fig is not None
+                fig.add_trace(go.Scatter(x=filtered_df["time"], y=y_data, name=str(file.name), mode="lines"))
+            else:
+                fig = px.line(
+                    filtered_df,
+                    x="time",
+                    y=y_data,
+                    title=str(file),
+                )
+                figures.append(dcc.Graph(figure=fig))
 
         app = Dash()
-        app.layout = html.Div([dcc.Graph(figure=fig)])
+        if self.group:
+            figures = [dcc.Graph(figure=fig, style={"height": "90vh"})]
+        app.layout = html.Div(figures)
 
         app.run(debug=True)