pybootchartgui: visualize /proc/net/dev network stats in graphs

This patch adds support for parsing and visualizing network interface statistics from /proc/net/dev in pybootchartgui. It introduces a new NetSample class to hold per-interface metrics, including received/transmitted bytes and their deltas over time.

The data is drawn using line and box charts in draw.py and helps to monitor
network usage during the boot process for each interface individually.

(From OE-Core rev: 9e640022c83a627bd05c23b66b658bd644b2f0d7)

Signed-off-by: denisova-ok <denisova.olga.k@yandex.ru>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/pybootchartgui/pybootchartgui/draw.py

@@ -69,6 +69,11 @@ CPU_COLOR = (0.40, 0.55, 0.70, 1.0)
 IO_COLOR = (0.76, 0.48, 0.48, 0.5)
 # Disk throughput color.
 DISK_TPUT_COLOR = (0.20, 0.71, 0.20, 1.0)
+
+BYTES_RECEIVED_COLOR = (0.0, 0.0, 1.0, 1.0)
+BYTES_TRANSMITTED_COLOR = (1.0, 0.0, 0.0, 1.0)
+BYTES_RECEIVE_DIFF_COLOR = (0.0, 0.0, 1.0, 0.3)
+BYTES_TRANSMIT_DIFF_COLOR = (1.0, 0.0, 0.0, 0.3)
 # CPU load chart color.
 FILE_OPEN_COLOR = (0.20, 0.71, 0.71, 1.0)
 # Mem cached color
@@ -437,6 +442,49 @@ def render_charts(ctx, options, clip, trace, curr_y, w, h, sec_w):
 
         curr_y = curr_y + 30 + bar_h
 
+    if trace.net_stats:
+        for iface, samples in trace.net_stats.items():
+            max_received_sample = max(samples, key=lambda s: s.received_bytes)
+            max_transmitted_sample = max(samples, key=lambda s: s.transmitted_bytes)
+            max_receive_diff_sample = max(samples, key=lambda s: s.receive_diff)
+            max_transmit_diff_sample = max(samples, key=lambda s: s.transmit_diff)
+
+            draw_text(ctx, "Iface: %s" % (iface), TEXT_COLOR, off_x, curr_y+20)
+            draw_legend_line(ctx, "Bytes received (max %d)" % (max_received_sample.received_bytes),
+                             BYTES_RECEIVED_COLOR, off_x+150, curr_y+20, leg_s)
+            draw_legend_line(ctx, "Bytes transmitted (max %d)" % (max_transmitted_sample.transmitted_bytes),
+                             BYTES_TRANSMITTED_COLOR, off_x+400, curr_y+20, leg_s)
+            draw_legend_box(ctx, "Bytes receive diff (max %d)" % (max_receive_diff_sample.receive_diff),
+                             BYTES_RECEIVE_DIFF_COLOR, off_x+650, curr_y+20, leg_s)
+            draw_legend_box(ctx, "Bytes transmit diff (max %d)" % (max_transmit_diff_sample.transmit_diff),
+                             BYTES_TRANSMIT_DIFF_COLOR, off_x+900, curr_y+20, leg_s)
+
+
+            chart_rect = (off_x, curr_y + 30, w, bar_h)
+            if clip_visible(clip, chart_rect):
+                draw_box_ticks(ctx, chart_rect, sec_w)
+                draw_annotations(ctx, proc_tree, trace.times, chart_rect)
+
+            if clip_visible (clip, chart_rect):
+                draw_chart (ctx, BYTES_RECEIVED_COLOR, False, chart_rect, \
+                        [(sample.time, sample.received_bytes) for sample in samples], \
+                        proc_tree, None)
+
+                draw_chart (ctx, BYTES_TRANSMITTED_COLOR, False, chart_rect, \
+                        [(sample.time, sample.transmitted_bytes) for sample in samples], \
+                        proc_tree, None)
+
+            if clip_visible (clip, chart_rect):
+                draw_chart (ctx, BYTES_RECEIVE_DIFF_COLOR, True, chart_rect, \
+                        [(sample.time, sample.receive_diff) for sample in samples], \
+                        proc_tree, None)
+
+                draw_chart (ctx, BYTES_TRANSMIT_DIFF_COLOR, True, chart_rect, \
+                        [(sample.time, sample.transmit_diff) for sample in samples], \
+                        proc_tree, None)
+
+            curr_y = curr_y + 30 + bar_h
+
     # render CPU pressure chart
     if trace.cpu_pressure:
         max_sample_avg = max (trace.cpu_pressure, key = lambda s: s.avg10)

scripts/pybootchartgui/pybootchartgui/parsing.py

@@ -48,6 +48,7 @@ class Trace:
         self.filename = None
         self.parent_map = None
         self.mem_stats = []
+        self.net_stats = []
         self.monitor_disk = None
         self.cpu_pressure = []
         self.io_pressure = []
@@ -557,6 +558,21 @@ def _parse_monitor_disk_log(file):
 
     return disk_stats
 
+
+def _parse_reduced_net_log(file):
+    net_stats = {}
+    for time, lines in _parse_timed_blocks(file):
+
+        for line in lines:
+            parts = line.split()
+            iface = parts[0][:-1]
+            if iface not in net_stats:
+                net_stats[iface] = [NetSample(time, iface, int(parts[1]), int(parts[2]), int(parts[3]), int(parts[4]))]
+            else:
+                net_stats[iface].append(NetSample(time, iface, int(parts[1]), int(parts[2]), int(parts[3]), int(parts[4])))
+    return net_stats
+
+
 def _parse_pressure_logs(file, filename):
     """
     Parse file for "some" pressure with 'avg10', 'avg60' 'avg300' and delta total values
@@ -767,6 +783,8 @@ def _do_parse(writer, state, filename, file):
         state.cmdline = _parse_cmdline_log(writer, file)
     elif name == "monitor_disk.log":
         state.monitor_disk = _parse_monitor_disk_log(file)
+    elif name == "reduced_proc_net.log":
+        state.net_stats = _parse_reduced_net_log(file)
     #pressure logs are in a subdirectory
     elif name == "cpu.log":
         state.cpu_pressure = _parse_pressure_logs(file, name)

scripts/pybootchartgui/pybootchartgui/samples.py

@@ -37,6 +37,16 @@ class CPUSample:
         return str(self.time) + "\t" + str(self.user) + "\t" + \
                str(self.sys) + "\t" + str(self.io) + "\t" + str (self.swap)
 
+
+class NetSample:
+    def __init__(self, time, iface, received_bytes, transmitted_bytes, receive_diff, transmit_diff):
+        self.time = time
+        self.iface = iface
+        self.received_bytes = received_bytes
+        self.transmitted_bytes = transmitted_bytes
+        self.receive_diff = receive_diff
+        self.transmit_diff = transmit_diff
+
 class CPUPressureSample:
     def __init__(self, time, avg10, avg60, avg300, deltaTotal):
         self.time = time