Teledyne LeCroy Summit T24 PCIe Multi-lane Protocol Analyzer User Manual - Manual (Page 51)

Summit T24 PCI Express Multi‐Lane Protocol Analyzer User Manual 39
Recording Multi‐Segmented CATC Traces Teledyne LeCroy
4.10.2 Saving a Recording
1. To save a current recording for future reference, select Save As from the File menu.
2. Give the recording a unique name, then save it to the appropriate directory.
4.11 Recording Multi-Segmented CATC Traces
If Save as Multisegment trace is enabled, PETracer divides the CATC Trace as it records it
into segments and stores them on the host machine's hard drive.
This option is useful for very large recordings and for host machines with limited memory.
In the latter case, multi‐segmenting gives a host machine with limited memory a way to
open recordings that are otherwise too large to open.
The only downside to multi‐segmenting is that limits the scope of reports such as
Traffic Summary, Bus Utilization, and Error Summary to each of the segments. You cannot
perform summary statistics on the full recording.
The default segment size is 10 MB. Before attempting large recordings, it is recommended
that you play with this number to see what value best suits your needs.
4.11.1 How to Create a Multisegment Recording
To create a Multisegment recording:
1. Select Setup > Recording Options to open the Recording Options dialog at the
General tab. Click Switch to Advanced Mode.
2. Check the box marked Save as Multisegment trace.
3. In the box marked MB Segments, enter a value of 4 to 128 MB.
4.11.2 What Gets Created
Multisegmenting produces an index file and segmented CATC Trace files. The default
name of the index file is data.pem.
The index file and the segmented CATC Trace files are stored in a directory named after
the index file. The directory is named data_pem_files. Below this directory additional,
sequentially numbered sub‐directories (up to 100,000) 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. Collectively, the
entire directory structure can hold up to 10 million files.