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https://github.com/ClementTsang/bottom
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227 lines
12 KiB
Markdown
227 lines
12 KiB
Markdown
# Process Widget
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The process widget displays a table containing information regarding a running process, along with sorting,
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searching, and process control features.
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<figure>
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<img src="../../../assets/screenshots/process/process_default.webp" alt="A picture of an expanded process widget by default."/>
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</figure>
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## Features
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The process widget has three main components:
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- The main process table
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- The search sub-widget (opened with ++ctrl+f++ or ++slash++)
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- The sort menu sub-widget (opened with ++s++ or ++f6++)
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By default, the main process table displays the following information for each process:
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- PID
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- Name of the process
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- CPU use percentage (note this is averaged out per available thread)
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- Memory use percentage
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- Reads per second
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- Writes per second
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- Total amount read
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- Total amount written
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- User
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- State
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### Sorting
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The table can be sorted by clicking on the table headers, which will either sort the table by that column, or if already
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sorting by that column, reverse the sorting order.
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Alternatively, one can sort using the sort menu sub-widget, which is brought up using ++s++ or ++f6++, and can be controlled by arrow keys or the mouse.
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<figure>
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<img src="../../../assets/screenshots/process/process_sort_menu.webp" alt="A picture of an expanded process widget with the sort menu open."/>
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</figure>
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### Grouping
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Pressing ++tab++ in the table will group entries with the same name together. The PID column will be replaced with the number of entries in each group, and usage
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is added together when displayed.
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<figure>
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<img src="../../../assets/screenshots/process/process_grouped.webp" alt="A picture of grouped mode in a process widget."/>
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</figure>
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Note that the process state and user columns are disabled in this mode.
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### Tree mode
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Pressing ++t++ or ++f5++ in the table toggles tree mode in the process widget, displaying processes in regards to their parent-child process relationships.
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<figure>
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<img src="../../../assets/screenshots/process/process_tree.webp" alt="A picture of tree mode in a process widget."/>
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</figure>
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A process in tree mode can also be "collapsed", hiding its children and any descendants, using either the ++minus++ or ++plus++ keys, or double clicking on an entry.
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Lastly, note that in tree mode, processes cannot be grouped together due to the behaviour of the two modes somewhat clashing.
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### Full command
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You can show the full command instead of just the process name by pressing ++P++.
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<figure>
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<img src="../../../assets/screenshots/process/process_full.webp" alt="A picture of a process widget using full commands."/>
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</figure>
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### Search
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Pressing ++slash++ or ++ctrl+f++ will open up the search sub-widget. By default, just typing in something will search by the process name.
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<figure>
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<img src="../../../assets/screenshots/process/search/search.webp" alt="A picture of searching for a process with a simple search."/>
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</figure>
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This search can be further enhanced by matching by case, matching the entire word, or by regex.
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<figure>
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<img src="../../../assets/screenshots/process/search/regex.webp" alt="A picture of searching for a process with a search condition that uses regex."/>
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</figure>
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We are able to also search for multiple things/conditions.
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<figure>
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<img src="../../../assets/screenshots/process/search/or.webp" alt="A picture of searching for a process with a search condition that uses the or operator."/>
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</figure>
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And if our search uses a keyword, we need to use quotation marks around the term to properly search it.
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<figure>
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<img src="../../../assets/screenshots/process/search/quotes.webp" alt="A picture of searching for a process with a search condition that needs quotation marks."/>
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</figure>
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Lastly, we can refine our search even further based on the other columns, like PID, CPU usage, etc., as well as grouping together conditions.
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<figure>
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<img src="../../../assets/screenshots/process/search/cpu.webp" alt="A picture of searching for a process with a search condition that uses the CPU keyword."/>
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</figure>
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#### Keywords
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Note all keywords are case-insensitive. To search for a process/command that collides with a keyword, surround the term with quotes (e.x. `"cpu"`).
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| Keywords | Example | Description |
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| ------------------------ | ------------------------------------- | ------------------------------------------------------------------------------- |
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| | `btm` | Matches by process or command name; supports regex |
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| `pid` | `pid=1044` | Matches by PID; supports regex |
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| `cpu` <br/> `cpu%` | `cpu > 0.5` | Matches the CPU column; supports comparison operators |
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| `memb` | `memb > 1000 b` | Matches the memory column in terms of bytes; supports comparison operators |
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| `mem` <br/> `mem%` | `mem < 0.5` | Matches the memory column in terms of percent; supports comparison operators |
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| `read` <br/> `r/s` | `read = 1 mb` | Matches the read/s column in terms of bytes; supports comparison operators |
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| `write` <br/> `w/s` | `write >= 1 kb` | Matches the write/s column in terms of bytes; supports comparison operators |
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| `tread` <br/> `t.read` | `tread <= 1024 gb` | Matches he total read column in terms of bytes; supports comparison operators |
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| `twrite` <br/> `t.write` | `twrite > 1024 tb` | Matches the total write column in terms of bytes; supports comparison operators |
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| `user` | `user=root` | Matches by user; supports regex |
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| `state` | `state=running` | Matches by state; supports regex |
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| `()` | `(<COND 1> AND <COND 2>) OR <COND 3>` | Group together a condition |
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#### Comparison operators
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| Keywords | Description |
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| -------- | -------------------------------------------------------------- |
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| `=` | Checks if the values are equal |
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| `>` | Checks if the left value is strictly greater than the right |
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| `<` | Checks if the left value is strictly less than the right |
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| `>=` | Checks if the left value is greater than or equal to the right |
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| `<=` | Checks if the left value is less than or equal to the right |
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#### Logical operators
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Note all operators are case-insensitive, and the `and` operator takes precedence over the `or` operator.
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| Keywords | Usage | Description |
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| ------------------------------------ | ------------------------------------------------------------------------------ | --------------------------------------------------- |
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| `and` <br/> `&&` <br/> `<Space>` | `<COND 1> and <COND 2>` <br/> `<COND 1> && <COND 2>` <br/> `<COND 1> <COND 2>` | Requires both conditions to be true to match |
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| `or` <br/> <code>||</code> | `<COND 1> or <COND 2>` <br/> `<COND 1> || <COND 2>` | Requires at least one condition to be true to match |
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#### Units
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All units are case-insensitive.
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| Keywords | Description |
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| -------- | ----------- |
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| `B` | Bytes |
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| `KB` | Kilobytes |
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| `MB` | Megabytes |
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| `GB` | Gigabytes |
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| `TB` | Terabytes |
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| `KiB` | Kibibytes |
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| `MiB` | Mebibytes |
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| `GiB` | Gibibytes |
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| `TiB` | Tebibytes |
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## Key bindings
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Note that key bindings are generally case-sensitive.
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### Process table
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| Binding | Action |
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| ---------------------- | ---------------------------------------------------------------- |
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| ++up++ , ++k++ | Move up within a widget |
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| ++down++ , ++j++ | Move down within a widget |
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| ++g+g++ , ++home++ | Jump to the first entry in the table |
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| ++G++ , ++end++ | Jump to the last entry in the table |
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| ++d+d++ , ++f9++ | Send a kill signal to the selected process |
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| ++c++ | Sort by CPU usage, press again to reverse sorting order |
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| ++m++ | Sort by memory usage, press again to reverse sorting order |
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| ++p++ | Sort by PID name, press again to reverse sorting order |
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| ++n++ | Sort by process name, press again to reverse sorting order |
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| ++tab++ | Toggle grouping processes with the same name |
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| ++P++ | Toggle between showing the full command or just the process name |
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| ++ctrl+f++ , ++slash++ | Toggle showing the search sub-widget |
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| ++s++ , ++f6++ | Toggle showing the sort sub-widget |
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| ++I++ | Invert the current sort |
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| ++"%"++ | Toggle between values and percentages for memory usage |
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| ++t++ , ++f5++ | Toggle tree mode |
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### Sort sub-widget
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| Binding | Action |
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| ------------------ | ------------------------------------- |
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| ++up++ , ++k++ | Move up within a widget |
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| ++down++ , ++j++ | Move down within a widget |
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| ++g+g++ , ++home++ | Jump to the first entry in the table |
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| ++G++ , ++end++ | Jump to the last entry in the table |
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| ++esc++ | Close the sort sub-widget |
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| ++enter++ | Sorts the corresponding process table |
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### Search sub-widget
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| Binding | Action |
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| ------------------------------------- | -------------------------------------------- |
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| ++left++ <br/> ++h++ <br/> ++alt+h++ | Moves the cursor left |
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| ++right++ <br/> ++l++ <br/> ++alt+l++ | Moves the cursor right |
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| ++tab++ | Toggle between searching by PID or name |
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| ++esc++ | Close the search widget (retains the filter) |
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| ++ctrl+a++ | Skip to the start of the search query |
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| ++ctrl+e++ | Skip to the end of the search query |
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| ++ctrl+u++ | Clear the current search query |
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| ++ctrl+w++ | Delete a word behind the cursor |
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| ++ctrl+h++ | Delete the character behind the cursor |
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| ++backspace++ | Delete the character behind the cursor |
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| ++delete++ | Delete the character at the cursor |
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| ++alt+c++ , ++f1++ | Toggle matching case |
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| ++alt+w++ , ++f2++ | Toggle matching the entire word |
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| ++alt+r++ , ++f3++ | Toggle using regex |
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## Mouse bindings
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### Process table
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| Binding | Action |
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| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| ++"Scroll"++ | Selects a CPU thread/average to show in the graph |
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| ++lbutton++ | Table header: Sorts/reverse sorts the table by the column <br/> Table entry: Selects an entry in the table, if in tree mode, collapses/expands the entry's children |
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### Sort sub-widget
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| Binding | Action |
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| ----------- | ----------------------------- |
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| ++lbutton++ | Selects an entry in the table |
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