User guide

4-38
CLIPSTER Edit Tool User Guide
cause for this drop. If the performance monitor is disabled, the log file
will be written but provide no information about drops that occurred.
This section explains the basic usage and the items of the performance
monitor.
4.6.1 The Chart
The chart of the performance monitor provides a graphical representa-
tion of the measured performance of the system. During play-out or
record operations the performance will be displayed via bars in the
chart.
The performance monitor can be switched between two measurings for
the performance of the system:
– Overall file I/O workload
With this setting the performance monitor measures the overall
workload of the system that occurred during a timed interval.
– Individual file I/O duration
This measuring is especially useful when operating in a single-
threaded I/O mode. Then the performance monitor displays the
access times of single files.
Drops are reported by the real-time core of the DVS software.
In some cases it may not be able to provide information about
the file name and/or path.
Only the last ten reports will be stored.
Individual frames missing in an image sequence (clip), i.e. im-
age files that are not present on the storage at all, are not reg-
istered as drops. You can check the consistency of your
material added to the bin with the menu option Check Bin on
the Bin menu (see section “Check Bin” on page 9-19 and sec-
tion “Consistencies of Clips” on page 6-63).
You can retrieve the location of files where drops occurred also
by setting timeline markers with the help of the drop table or
its controls (see section “The Drop Table” on page 4-42 and
section “The Table Controls” on page 4-43).
The DVS software can operate in two different I/O modes: It
can process several image files simultaneously (multi-threaded
I/O mode) or one file at a time (single-threaded I/O mode).
Although the multi-threaded I/O mode is the recommended
mode for the DVS software because it is more flexible and fast-
er, it can be set to a single-threaded I/O mode via a setting
available in the Configuration Tool (see “CLIPSTER Configura-
tions” user guide for more information).