Readlog Print Options

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The following table provides detail about the Readlog print options.

Print option Description


Prints byte offsets for all events; that is, prints the event position in the .clg file.This parameter is useful for repairing log file corruption.


Prints timestamps as the length of time elapsed since the last event, rather than absolute times.This parameter is useful for measuring system run-time between successive events.


Prints timestamps as comma delimited number of microseconds, which are readable in Excel.

-f <parameter>

Filters out selected events, which are specified using additional parameters. The default setting is no filtering. Parameters are case-sensitive.

For more information, see Creating and Using Custom Filters with Readlog.

The following list shows specific pre-defined filters you can apply.

  • -f T
    Filters out thread, reschedule, migrate, and priority-invert events.
  • -f P
    Filters out process events.
  • -f I
    Filters out Interrupt events.
  • -f K
    Filters out KCALL entry and exit events.
  • -f M
    Filters out memory tracking events such as heap allocations, reallocations, and frees.
  • -f C
    Filters out critical section events.
  • -f S
    Filters out synchronization objects such as semaphores, mutexes, and events.
  • -f X
    Filters out all system events. This has the same effect as using the TPIKMCS flags in a command.


Prints IDs for all events.This parameter is useful for selecting ranges to use with the range option.

For more information, see Working with Event Ranges in Readlog.

-range <ID1><ID2>

Prints only events from <ID1> to <ID2>, inclusive.This parameter is useful for creating a summary of only a particular range of data.

For more information, see Working with Event Ranges in Readlog.


Prints time as hex counter ticks, with no adjustment for counter frequency.

This parameter is useful in debugging timestamp problems.


Print summary of logged events. If a range is provided, the summary includes only events in the range.

For more information, see Creating a Log Summary.


Prints Unicode output.


Prints verbose information.

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