Use the I/O view to identify the I/O patterns in your application and pinpoint the I/O bottlenecks that impact its performance. The I/O view is available if you profiled your application for I/O tracing data.
You can aggregate the I/O data according to one of the following options:
Shows a table of the files accessed by the program. Each row represents a file. The metrics for one row represent the aggregated I/O statistics for all accesses of the file.
Shows a table of file descriptors for files accessed by the program. Each row represents a single instance of a file being opened. If the same file is opened multiple times the table contains multiple rows for the same file. The metrics for one row apply to a single instance of the file opening.
Shows a table of call stacks listed with arbitrary stack numbers. Click a stack to see the function calls in the stack displayed in the Call Stack panel. The metrics apply to the selected call stack.