Rev. A, 01/07/99
Data Collection Tools based on off the shelf components integrated with custom designed hardware and software.
Adapticom's trace tools are made up of six basic hardware components:
Typically, some custom hardware design is involved in components one and two, while components three through
six are available as "off the shelf" items. A variety of custom software programs control the whole system.
- Data Probe
- Realtime Data Storage Unit
- Validation Unit
- Intermediate Storage Unit
- Long-term Data Storage Unit
- Post Processing/Modeling Unit
Specific trace tools are created by identifying a point within the target system from which the client would like
to collect data. Through discussions with the client, a determination is made regarding what data is of interest to the client and
what quantity of the data is required. This information is utilized in bandwidth calculations for the selection of
a probe and subsequent downstream hardware. Once the site has been selected and the probe procured, small quantities
of data can be collected as samples.
Some typical sites of interest could be:
Once the probe has been selected, the bandwidth and data quantity calculations are used to select or custom
design the "realtime storage unit". As in the case of probes, off the shelf storage units are used when
possible; however, due to the enormous quantities and bandwidth of the data collected, special storage
unit designs are sometimes required.
- The CPU bus
- The PCI bus
- Cluster Controller
In the above cases a logic analyzer probe from one of the major vendors would be used when available.
When existing probes are unavalable or unsuitable, a custom probe is designed and fabricated.
In all cases, custom interface hardware is fabricated to interface between the probe and the realtime
storage unit. The realtime storage unit is then connected to the intermediate-term storage unit via one of
several possible high speed interfaces.
The Validation unit works in parallel with the Probe and Realtime Storage unit to collect an independent subset of samples
which can be used to validate the data collected.
Depending on the specifics of an implementation, data may be transferred from the Intermediate Storage Unit to the remaining
downstream hardware via ethernet or other LAN type interfaces.
Comments on http://www.adapti.com/trace-tools to:
P.O. Box 91461
Raleigh, NC 27675-1461
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