Enhanced Traffic Graph Widget with Multi-timeframe Support and Data Persistence #866

rebroad commented at 11:00 PM on April 9, 2025: contributor

This PR improves the network traffic graph widget in the Debug window to provide:

Multiple time range options (from 5 minutes to 28 days)
Data persistence between sessions
Interactive visualization features including tooltips and logarithmic scaling

Motivation

The existing network traffic graph has limited utility with its fixed time range and lack of historical data preservation. This enhancement allows users to:

Analyze network traffic patterns over different timeframes
Preserve historical traffic data between session restarts
Interact with the graph to get specific data points
Better visualize varying traffic volumes with logarithmic scaling

These improvements are valuable for:

Network debugging and troubleshooting
Understanding Bitcoin Core's network behaviour
Monitoring traffic patterns for optimization
Research purposes

Implementation

The implementation preserves all existing functionality while adding new features:

Added a pre-configured timeframe selection (13 different timeframes)
Implemented traffic data serialization and deserialization
Enhanced the visualization with interactive features
Improved tooltip information with precise timestamps and traffic rates

Supporting changes:

Added formatBytesps function for a prettier display of traffic rates
Added FormatISO8601Time for better time display

Testing

Tested on Linux with various network conditions. The new functionality can be exercised by:

Using the slider (or arrow keys) to select different time ranges
Restarting the application to verify data persistence
Clicking on the graph to toggle between linear and logarithmic scales
Hovering over data points to view detailed information

Documentation

The changes are mostly self-documenting through the UI and are constrained to the Qt interface without affecting core functionality.

Compatibility

This PR maintains compatibility with existing functionality. The data persistence file uses proper serialization versioning to allow for future format changes if needed.

DrahtBot commented at 11:00 PM on April 9, 2025: contributor

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Concept ACK	RandyMcMillan

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Conflicts

No conflicts as of last run.

LLM Linter (✨ experimental)

Possible places where named args for integral literals may be used (e.g. func(x, /*named_arg=*/0) in C++, and func(x, named_arg=0) in Python):

UpdateNum(m_new_fmax, m_fmax, y_increment, 300) in src/qt/trafficgraphwidget.cpp
UpdateNum(m_values[m_new_value], m_range, x_increment, 500) in src/qt/trafficgraphwidget.cpp

2026-05-27 13:08:21

DrahtBot added the label CI failed on Apr 9, 2025

DrahtBot commented at 11:49 PM on April 9, 2025: contributor

🚧 At least one of the CI tasks failed. Debug: https://github.com/bitcoin-core/gui/runs/40286962281

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

</details>

rebroad force-pushed on Apr 10, 2025

DrahtBot removed the label CI failed on Apr 10, 2025

rebroad marked this as ready for review on Apr 10, 2025

rebroad renamed this:
~~qt: Improve TrafficGraphWidget functionality~~
qt: Enhanced Traffic Graph Widget with Multi-timeframe Support and Data Persistence
on Apr 11, 2025

in src/qt/trafficgraphwidget.cpp:46 in 31b1ffc0ff outdated

  51 | +
  52 | +            // Restore the saved total bytes counts to the node if they exist
  53 | +            if (m_total_bytes_recv > 0 || m_total_bytes_sent > 0) {
  54 | +                model->node().setTotalBytesRecv(m_total_bytes_recv);
  55 | +                model->node().setTotalBytesSent(m_total_bytes_sent);
  56 | +            }

luke-jr commented at 10:10 PM on April 14, 2025:

The GUI should not be changing low-level internals.

If for some reason the clientModel is changed, its data should be taken as authoritative, even if it contradicts the history so far (if that's an issue, wipe the history).

Alternatively, maybe the history should be stored with the node, and loaded into the GUI (or RPC, in another hypothetical PR).

rebroad commented at 11:01 PM on April 15, 2025:

The idea is that the data is not persistent - but yes, I see your point - it should probably not be something that only happens when the GUI is running, and should perhaps also happen in bitcoind also.

rebroad commented at 8:52 PM on April 30, 2025:

The GUI should not be changing low-level internals.

If for some reason the clientModel is changed, its data should be taken as authoritative, even if it contradicts the history so far (if that's an issue, wipe the history).

Alternatively, maybe the history should be stored with the node, and loaded into the GUI (or RPC, in another hypothetical PR). @luke-jr I've removed the setTotalBytes functions as I agree with your reasoning. The GUI keeps a local track of the totals from the last session and simply adds them to the totals provided by the node now. I did think about storing the data on the node, but I am not sure it makes much sense given the data is currently stored on the GUI and so it makes more sense to keep the totals local with the traffic history for now. Perhaps someone thinks it's worth storing this on the node in the future, but it doesn't seem like an urgent need for now.

in src/qt/forms/debugwindow.ui:698 in 31b1ffc0ff outdated

 702 | @@ -694,16 +703,6 @@
 703 |               </property>
 704 |              </widget>
 705 |             </item>
 706 | -           <item>
 707 | -            <widget class="QPushButton" name="btnClearTrafficGraph">

luke-jr commented at 10:12 PM on April 14, 2025:

If we're deleting this, maybe there should be a way for the user to insert a reference line?

For now, I'd move removal of anything to a separate PR.

rebroad commented at 10:59 PM on April 15, 2025:

The user can effectively remove the data by deleting the .dat file - is there any basis for being able to do this while the client is running?

in src/qt/rpcconsole.cpp:581 in 31b1ffc0ff outdated

 575 | @@ -578,7 +576,7 @@ RPCConsole::RPCConsole(interfaces::Node& node, const PlatformStyle *_platformSty
 576 |      // based timer interface
 577 |      m_node.rpcSetTimerInterfaceIfUnset(rpcTimerInterface);
 578 |  
 579 | -    setTrafficGraphRange(INITIAL_TRAFFIC_GRAPH_MINS);

luke-jr commented at 10:12 PM on April 14, 2025:

Why are we losing this default constant?

rebroad commented at 10:57 PM on April 15, 2025:

because it isn't needed - on startup it "defaults" to the first non-full range

in src/util/time.cpp:78 in 31b1ffc0ff outdated

  74 | @@ -75,6 +75,13 @@ void MockableSteadyClock::ClearMockTime()
  75 |  
  76 |  int64_t GetTime() { return GetTime<std::chrono::seconds>().count(); }
  77 |  
  78 | +int64_t GetTimeMillis()

luke-jr commented at 10:14 PM on April 14, 2025:

I doubt we'll be restoring this. It was removed intentionally.

rebroad commented at 10:56 PM on April 15, 2025:

yes, I'm going to remove this, will push an update shortly

luke-jr changes_requested

luke-jr commented at 10:14 PM on April 14, 2025: member

Merging it all together likes this makes review very annoying. It was better as separate PRs.

rebroad commented at 11:02 PM on April 15, 2025: contributor

Merging it all together likes this makes review very annoying. It was better as separate PRs.

I vaguely remember people complaining that I was raising several PRs that could be combined when I first raised the PRs years ago.... I guess one cannot please everyone all of the time. @luke-jr As a middle-ground, I can move the distinct functional changes into different commits.

rebroad requested review from luke-jr on Apr 15, 2025

rebroad force-pushed on Apr 16, 2025

laanwj renamed this:
~~qt: Enhanced Traffic Graph Widget with Multi-timeframe Support and Data Persistence~~
Enhanced Traffic Graph Widget with Multi-timeframe Support and Data Persistence
on Apr 24, 2025

laanwj added the label Feature on Apr 24, 2025

rebroad force-pushed on Apr 30, 2025

rebroad force-pushed on May 1, 2025

rebroad commented at 11:11 PM on May 1, 2025: contributor

I've removed the code that changed the totals on the node - the GUI just keeps track now without writing values to the node. Also, added some checks for corrupt save files so that it doesn't load bad data.

rebroad force-pushed on May 1, 2025

DrahtBot added the label CI failed on May 1, 2025

DrahtBot commented at 11:15 PM on May 1, 2025: contributor

🚧 At least one of the CI tasks failed. Task lint: https://github.com/bitcoin-core/gui/runs/41512420338 LLM reason (✨ experimental): The CI failure is caused by a lint check failure due to the use of tabs instead of spaces in the codebase.

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

</details>

rebroad force-pushed on May 2, 2025

rebroad commented at 6:36 AM on May 2, 2025: contributor

I realise this PR is starting to look a bit messy with all the updates. I also realise I ought to separate various functionality changes into separate commits. Is it better to raise a new PR once this is done, force push to this one?

rebroad force-pushed on May 2, 2025

DrahtBot removed the label CI failed on May 2, 2025

rebroad force-pushed on May 2, 2025

rebroad marked this as a draft on May 2, 2025

rebroad force-pushed on May 3, 2025

rebroad commented at 7:46 PM on May 3, 2025: contributor

Have just added some more GUI improvements - the text on the graph now has a black outline around it making it easier to read (and is printed AFTER the graph rather than before) .Also, the grey line at the bottom of the graph is now printed after the graph also, causing the graph not to spill onto that line.

Also, the bright green and red lines no longer surround the sides of the graph but only draw an outline along actual graph values. This makes it easier to distinguish about the graph going off the edge of the display areas, vs a sudden drop in traffic (which previously looked the same). The now graph also fills the area fully to the edges at the side now (which it did not before due to rounding issues).

It would be useful to know whether I should split all these changes into individual pull requests, or individual commits, or better all together like this.

rebroad force-pushed on May 4, 2025

DrahtBot added the label CI failed on May 4, 2025

DrahtBot commented at 9:26 PM on May 4, 2025: contributor

🚧 At least one of the CI tasks failed. Task previous releases, depends DEBUG: https://github.com/bitcoin-core/gui/runs/41616791301 LLM reason (✨ experimental): The CI failed due to a compilation error caused by treating warnings as errors, specifically a sign comparison warning in trafficgraphwidget.cpp.

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

</details>

rebroad force-pushed on May 5, 2025

rebroad force-pushed on May 6, 2025

DrahtBot removed the label CI failed on May 6, 2025

rebroad force-pushed on May 6, 2025

rebroad force-pushed on May 8, 2025

DrahtBot added the label CI failed on Jul 5, 2025

DrahtBot commented at 4:45 PM on July 5, 2025: contributor

🚧 At least one of the CI tasks failed. Task tidy: https://github.com/bitcoin-core/gui/runs/41904414250 LLM reason (✨ experimental): The failure is caused by compilation errors due to ignoring the return value of 'fclose()' functions marked as 'nodiscard', leading to build failure.

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

</details>

DrahtBot added the label Needs rebase on Jul 8, 2025

maflcko removed the label CI failed on Sep 4, 2025

RandyMcMillan commented at 3:06 PM on September 24, 2025: contributor

concept ACK

th30neee approved

rebroad marked this as ready for review on May 26, 2026

qt: Add formatBytesps function for bytes per second display

Add a new GUI utility function to format bytes per second values with appropriate
units (B/s, kB/s, MB/s, GB/s) and precision, ensuring consistent and readable
display of network traffic rates in the traffic graph widget.

e5027a3acd

util: Add FormatISO8601Time function for time-only ISO format

Add a new time formatting function that matches the existing date and datetime
ISO8601 formatting functions, providing consistent time display for the
traffic graph widget tooltips and other UI elements that need time-only display.

8819b820e4

rebroad force-pushed on May 26, 2026

DrahtBot removed the label Needs rebase on May 26, 2026

DrahtBot added the label CI failed on May 26, 2026

DrahtBot commented at 3:15 PM on May 26, 2026: contributor

🚧 At least one of the CI tasks failed. Task macOS-cross to arm64: https://github.com/bitcoin-core/gui/actions/runs/26448991497/job/77864217892 LLM reason (✨ experimental): CI failed because the C++ build broke in trafficgraphwidget.cpp with compile errors (LogPrintf undeclared and fclose() return ignored) treated as fatal under -Werror.

<details><summary>Hints</summary>

Try to run the tests locally, according to the documentation. However, a CI failure may still happen due to a number of reasons, for example:

Possibly due to a silent merge conflict (the changes in this pull request being incompatible with the current code in the target branch). If so, make sure to rebase on the latest commit of the target branch.
A sanitizer issue, which can only be found by compiling with the sanitizer and running the affected test.
An intermittent issue.

Leave a comment here, if you need help tracking down a confusing failure.

</details>

qt: Enhance TrafficGraphWidget with multi-timeframe support and data persistence

This commit significantly improves the network traffic graph widget with:

1. Multiple timeframe support - View traffic data across different time
   periods (5 minutes to 28 days) using an enhanced slider interface

2. Traffic data persistence - Save and restore traffic information
   between sessions, preserving historical traffic patterns

3. Interactive visualization features:
   - Logarithmic scale toggle (mouse click) for better visualization of
     varying traffic volumes
   - Interactive tooltips showing detailed traffic information at specific points
   - Yellow highlight indicators for selected data points

4. Smooth transitions between different time ranges with animated scaling

These improvements allow users to better monitor and analyze network
traffic patterns over time, which is especially useful for debugging
connectivity issues or understanding network behavior under different
conditions.

The implementation includes proper thread-safety considerations and
handles edge cases like time jumps or missing data appropriately.

601f085037

rebroad force-pushed on May 27, 2026