Command Line Options¶

• Table of contents
• Command Line Options
• Overview
  • Window size
  • Stopping when first difference
  • Skip matching for the rest

Overview¶

The Trace Matcher command line looks as follows:

usage: traceutils [-h] [-w [W_SIZE]] [-fds] [-sr] [-d] [-se] FILE [FILE ...]

positional arguments:
  FILE                  Path to trace file

optional arguments:
  -h, --help            Show this help message and exit
  -w [W_SIZE], --window-size [W_SIZE]
                        Matching window size in ticks (default: 1)
  -fds, --first-dif-stop
                        Stop the tool when the first difference is detected (default: disabled)
  -sr, --skip-rest      Skip matching for the rest of the longest trace (default: disabled)
  -d, --debug           Enable printing for debug messages (default: disabled)
  -se, --skip-equal     Skip subsequent records if they differ in time field only (default: disabled)

The detailed descriptions of some specific options are given below.

Window size¶

For example, there are two input trace files that are called log1.txt and log2.txt. The log1.txt file contains the following records:

1 clk 0 IT (1) 00000004 3c080001 A svc : lui t0,0x1
1 clk R r8 00000000

The log2.txt file contains the following records:

1 clk R r8 00000000
1 clk 0 IT (1) 00000004 3c080001 A svc : lui t0,0x1

Trace files to compare may contain same records (lines), but at different positions relative to each other. To take this effect into account and do not treat actually simultaneous but formally logged in different order events, a window concept is introduced. The idea is not to compare trace files record by record, but "record block" by "records block" with the aim to find equal but reordered records. Such block is called as "window". Window is characterized by it's size that is a number of records inside the window. By default, window size is set to 1. It means that record by record comparison will be made.

Stopping when first difference¶

When an appropriate option is enabled, the tool ceases matching process when the first non-matched record has been detected.

Skip matching for the rest¶

There are not so many reasons to continue the matching process when there is only one not completely parsed trace. When enabled, the appropriate option disables matching in such case.