Viewing I/O Information

Prerequisites

A real-time profiling task has been created and is in progress.

Viewing File I/O Information

1. In the Task/Report List area of the Java Profiler page, click the name of the analysis task under Real-Time Profiling.

   The Overview tab page is displayed.

2. Click the IO tab.

   The File IO tab page is displayed by default.

3. Click Start Analysis.
   The file I/O statistics report is generated, as shown in Figure 1. For details about the parameters, see Table 1.

   

   • You can use the search box to filter data.
   • You can click in the upper right corner of the page to save the snapshot of the current page to the Snapshot tab page.
   • At the bottom of the page, the stack invoking information is displayed in the Stack Trace area. You can press the Tab key to switch the focus to the text area of the tree component, Up and Down arrow keys to move between parallel nodes, and Left and Right arrow keys to expand and collapse nodes and move the focus across levels. When the focus is on a node name, press Enter or Space to select or deselect the node.
   • You can click in the upper right corner of the page and choose Tool Configuration > Java Profiler > System Settings to change the value of Stack Depth to re-define the stack depth in the Stack Trace area.
   Figure 1 File I/O
   

   Table 1 Parameters on the file I/O tab page

   Parameter	Description
   File Path/File Descriptor	Path and descriptor of the file to be analyzed.
   Total I/O Duration	Total write/read time of the file.
   Count	Total number of write/read times of the file.
   Read Count	Number of read times of the file.
   Write Count	Number of write times of the file.
   Read Bytes	Number of bytes read from the file.
   Written Bytes	Number of bytes written to the file.
   Thread Name	Name of the thread called by the file I/O.
   Operation Type	Type of the file I/O operation.
   Operation Time	Time when a file I/O operation is performed.
   Read and Written Bytes	Number of bytes read or written.
   Rate	File write/read speed.
   Time Used	Time used by the file I/O operation.
   File I/O Read/Write Speed
   Read speed	Current file read speed.
   Write speed	Current file write speed.

Viewing Socket I/O Information

1. In the Task/Report List area of the Java Profiler page, click the name of the analysis task under Real-Time Profiling.

   The Overview tab page is displayed.

2. Choose IO > Socket IO.

   The Socket IO tab page is displayed.

3. Click Start Analysis.
   The socket I/O statistics report is generated, as shown in Figure 2. For details about the parameters, see Table 2.

   

   • You can use the search box to filter data.
   • You can click in the upper right corner of the page to save the snapshot of the current page to the Snapshot tab page.
   • At the bottom of the page, the stack invoking information is displayed in the Stack Trace area. You can press the Tab key to switch the focus to the text area of the tree component, Up and Down arrow keys to move between parallel nodes, and Left and Right arrow keys to expand and collapse nodes and move the focus across levels. When the focus is on a node name, press Enter or Space to select or deselect the node.
   • You can click in the upper right corner of the page and choose Tool Configuration > Java Profiler > System Settings to change the value of Stack Depth to re-define the stack depth in the Stack Trace area.
   Figure 2 Socket IO
   

   Table 2 Parameters on the socket I/O tab page

   Parameter	Description
   Remote Address/Port/File Descriptor	Remote address, port number, and file descriptor.
   Total I/O Duration	Total write/read time of the socket.
   Count	Total number of write/read times of the socket.
   Read Count	Number of read times of the socket.
   Write Count	Number of write times of the socket.
   Read Bytes	Number of bytes read from the socket.
   Written Bytes	Number of bytes written to the socket.
   Thread Name	Name of the thread called by the socket I/O.
   Operation Type	Type of the socket I/O operation.
   Operation Time	Time when a socket I/O operation is performed.
   Read and Written Bytes	Number of bytes read or written.
   Rate	Socket write/read speed.
   Time Used	Time used by the socket I/O operation.
   Socket I/O Read/Write Speed
   Read speed	Current read speed of the socket.
   Write speed	Current write speed of the socket.