Patent application number | Description | Published |
20080235538 | Techniques for generating a trace stream for a data processing apparatus - A data processing apparatus and method are provided for generating a trace stream. The data processing apparatus comprises logic for producing data elements, and trace logic for producing a stream of trace elements representative of at least some of the data elements. The trace logic has trace generation logic operable to generate trace elements for inclusion in the stream, and is further arranged to generate trace timing indicators for inclusion in the stream. Each trace timing indicator indicates the elapse of one or more processing timing intervals, the processing timing interval being a predetermined plurality of clock cycles. | 09-25-2008 |
20090006934 | Triggering diagnostic operations within a data processing apparatus - A data processing apparatus | 01-01-2009 |
20090125756 | Trace data timestamping - A data processing apparatus is provided, comprising monitored circuitry for performing activities, trace circuitry for producing a stream of trace elements representative of at least some of these activities, and detection circuitry for detecting the occurrence of a predetermined subset of the activities for which the trace circuitry is producing trace elements. When an activity in that predetermined subset of activities is detected a timing indication is added to the stream of trace elements. Hence, the valuable trace bandwidth- may be preserved, by limiting the trace elements for which a timing indication is added into the trace stream to a predetermined subset of the activities for which trace elements are generated, and the valuable global or relative timing accuracy of those activities represented in the trace stream is retained, without flooding the trace stream with timing indications. | 05-14-2009 |
20090132863 | Packing trace protocols within trace streams - A data processing apparatus is provided with packing circuitry | 05-21-2009 |
20090193297 | Diagnostic context construction and comparison - A data processing system 1 has a processor core | 07-30-2009 |
20090313507 | Generation of trace data in a multi-processor system - A data processing apparatus is provided having a plurality of processing circuits each having access to a memory. Tracing circuitry is provided for generating a stream of trace data for generating a stream of trace data corresponding to at least one of the plurality of processing circuits. Selection circuitry is provided to enable selective switching of the tracing circuitry from generating a first trace data stream corresponding to a first one of the plurality of processing circuits generating a second different trace data stream corresponding to a different one of the plurality of processing circuits. The selective switching is performed in dependence upon processing state information associating with one or more of the plurality of processing circuits. A corresponding method and computer program product are also provided. | 12-17-2009 |
20110029823 | Techniques for generating a trace stream for a data processing apparatus - A data processing apparatus and method are provided for generating a trace stream. The data processing apparatus comprises logic for producing data elements, and trace logic for producing a stream of trace elements representative of at least some of the data elements. The trace logic has trace generation logic operable to generate trace elements for inclusion in the stream, and is further arranged to generate trace timing indicators for inclusion in the stream. Each trace timing indicator indicates the elapse of one or more processing timing intervals, the processing timing interval being a predetermined plurality of clock cycles. | 02-03-2011 |
20110231461 | Identifier selection - A data processing apparatus is provided which is configured to select 2 | 09-22-2011 |
20110320651 | Buffering of a data stream - A data processing apparatus is provided comprising a buffer for buffering data contained in a data stream generated by a data stream generator and received by a data stream receptor. Buffer occupancy tracking circuitry is provided and configured to maintain a high buffer utilisation value providing an indication of a high buffer occupation level for a given time period during utilisation of the buffer. Alternatively, in an apparatus where the buffer is implemented in dedicated memory, the buffer occupancy tracking circuitry is configured to store a programmable buffer size limit controlling a maximum allowable buffer storage capacity. | 12-29-2011 |
20120030499 | Distribution of an incrementing count value - Circuitry is disclosed that comprises: at least one element located within the circuitry and configured to hold an increasing count value; an encoder for receiving the increasing count value from a source of the increasing count value and configured to encode the increasing count value into encoded values, the encoded values each indicating an exponential amount to be applied to the count value held in the at least one element; interconnect circuitry for receiving the encoded value and transmitting the encoded value to the at least one element; wherein the at least one element comprises a decoder for decoding the encoded values and for increasing the count value in dependence upon the exponential amount. | 02-02-2012 |
20120110387 | TRACE SYNCHRONIZATION - A data processing apparatus having one or more trace data sources. At least one of said trace data sources includes a trace data generator responsive to activity in monitored circuitry to generate trace data representing said activity. A synchronization marker generator is coupled to the trace data generator and operates to generate a synchronization marker and insert the synchronization marker into the trace data stream. A controller is coupled to the synchronization marker generator to generate and insert a synchronization marker into the trace data stream. The controller controls initiation in dependence on behavior of the data processing apparatus downstream of the trace data generator. In this way, the downstream behavior of the data processing apparatus can be made to influence the rate and timing of insertion of synchronization markers into a trace data stream. | 05-03-2012 |
20140019501 | IDENTIFIER SELECTION - A data processing apparatus is provided which is configured to select 2 | 01-16-2014 |