User guide

4-37
The Tool Area
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If the chart controls, the drop table as well as the table controls are
dimmed, the performance monitor is turned off. Then, in the status bar
the message ’Performance Monitor disabled’ will be displayed. To mea-
sure the workload of the system with the performance monitor it has
to be enabled via the Configuration Tool of the DVS software (see
“CLIPSTER Configurations” user guide for more information).
As soon as the software is started, the performance monitor will write
by default a drop report into the subdirectory drop_reports under
the directory log available in the DVS software’s installation path (de-
fault: C:\Program Files\DVS\Clipster). There will be one re-
port written per session. However, it will inform you about drops that
occurred during this session only when the performance monitor is en-
abled. Then the report contains information about, for example, the
date and time when the drop occurred or about the file that was the
chart controls With the chart controls you can control the appear-
ance of the results in the chart or create a proprietary
DVS information file. They are explained in section
“Chart Controls” on page 4-40.
status bar Right below the chart controls you can find a status
bar which will provide you with status messages
about the operation of the performance monitor. It
is described in section “The Status Bar” on
page 4-41.
drop table As soon as drops occur during a real-time operation,
entries will appear in the drop table, one for each
drop that could be detected. The entries provide in-
formation, for example, about the date and time
when the drop occurred or about the file that was
the cause for this drop. You can find a description of
the drop table in section “The Drop Table” on
page 4-42.
table controls Via the table controls you can either save the results
shown in the drop table to a file or set markers in the
timeline of the Edit Tool where the respective drop
took place. They are in detail explained in section
“The Table Controls” on page 4-43.
The DVS software is able to process several different image
files simultaneously (multi-threaded I/O mode). Therefore,
one bar drawn in the chart may represent several file accesses.
Although the multi-threaded I/O mode is the recommended
mode for the DVS software, it can be set to a single-threaded
I/O mode via a setting available in the Configuration Tool (see
“CLIPSTER Configurations” user guide).