Teledyne LeCroy Summit T24 PCIe Multi-lane Protocol Analyzer User Manual - Manual (Page 67)

Summit T24 PCI Express Multi‐Lane Protocol Analyzer User Manual 55
Save As MultiSegment Trace Teledyne LeCroy
The PETracer application forces this option when the user selects a large buffer size for
recording. This is done to limit the size of individual trace files to a level that the PETracer
application can efficiently work with. The maximum size of the recording buffer that can
still be used for single trace recordings is 1024MB (1GB).
In Advanced Mode this option allows the Analyzer to segment the CATC Trace into 4 MB
to 128 MB files and to create an index file that summarizes the starting and finishing
frame for each segment.
Figure 5.10: Save As MultiSegment Trace
The index file has a default name of data.pem.
The index file and segmented CATC Trace files are stored in a directory named
data_pem_files. The directory is named after the index file. Below this directory
additional, sequentially numbered sub‐directories (up to 10,000) hold the segmented
CATC Trace files. These sub‐directories bear simple numerical names: 00000 to 00999.
Each of these subdirectories can hold up to 100 sequentially numbered segment files.
Example
A 1010 MB recording using the default file names creates the following sub‐directories
and files:
data.pem (This is the index file.)
data_pem_files\00000\segment_00000.pex
data_pem_files\00000\segment_00001.pex
...
data_pem_files\00000\segment_00099.pex
data_pem_files\00001\segment_00100.pex
data_pem_files\00001\segment_00101.pex
The index file looks something like a CATC Trace file but contains packet‐like entities that
summarize each segment.
5.13.1 Viewing Multisegmented Files
If Save As MultiSegment Trace is enabled in the General tab of the Recording Options, the
PETracer divides the CATC Trace into segments and stores them on the host machine's
hard drive. Segment size is set in the MB Segments box. Enter a value from 4 MB to 128
MB.
PETracer also creates an index file that provides a brief summary of each segment and
hyperlinks to each of the segments. Double‐clicking a segment summary in the index file
causes PETracer to open that segment.
You can also navigate through the segments by clicking the buttons on the Multisegment
toolbar.