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

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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>
This commit is contained in:
Olga Denisova
2025-04-15 19:35:27 +03:00
committed by Richard Purdie
parent a0c83d9069
commit f68e3e49d4
3 changed files with 76 additions and 0 deletions
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48
scripts/pybootchartgui/pybootchartgui/draw.py
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@@ -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)