Digital Signal Measuring Apparatus and Traffic Observing Method

Abstract

A digital signal measuring apparatus comprises a bus probe unit for extracting a bus event occurring on a bus based on a digital bus signal on the bus of the system to be measured, a traffic measuring unit for counting the number of occurrences of bus event based on the occurrence information of the extracted bus event, and a console unit for acquiring and processing the count value of the traffic measuring unit.

1 . A digital signal measuring apparatus comprising: 
 at least one bus probe operative to acquire at least one signal from at least one bus, decode the at least one signal to determine whether at least one of a plurality of events has occurred, and output at least one trigger signal indicative of whether the at least one of the plurality of events has occurred; and    at least one counter unit coupled to the at least one bus probe and comprising at least one counter, the at least one counter operative to store at least one value based at least in part on at least a given trigger signal.    
   
   
       2 . The digital signal measuring apparatus of  claim 1 , wherein each bus probe outputs a plurality of trigger signals and each trigger signal indicates whether a respective one of the plurality of events has occurred.  
   
   
       3 . The digital signal measuring apparatus of  claim 1 , wherein a given one of a plurality of bus probes acquires at least one signal from a given one of a plurality of buses.  
   
   
       4 . The digital signal measuring apparatus of  claim 1 , further comprising a buffer for synchronizing the at least one trigger signal with the at least one counter.  
   
   
       5 . The digital signal measuring apparatus of  claim 1 , further comprising at least one processing unit operative to read at least one value from the at least one counter.  
   
   
       6 . The digital signal measuring apparatus of  claim 1 , wherein the plurality of events comprise at least one of a memory read and a memory write.  
   
   
       7 . The digital signal measuring apparatus of  claim 1 , wherein the plurality of events comprise at least one of a memory read line, a memory read multiple, and a memory write and invalidate.  
   
   
       8 . The digital signal measuring apparatus of  claim 1 , wherein the plurality of events comprise at least one of an input/output read and an input/output write.  
   
   
       9 . A traffic observing method, comprising the steps of: 
 acquiring at least one signal from at least one bus;    decoding the at least one signal to determine whether at least one of a plurality of events has occurred;    generating at least one trigger signal indicative of whether the at least one of the plurality of events has occurred; and    storing at least one value based at least in part on the at least one trigger signal.    
   
   
       10 . The traffic observing method of  claim 9 , wherein each trigger signal indicates whether a respective one of the plurality of events has occurred.  
   
   
       11 . The traffic observing method of  claim 9 , further comprising the step of: 
 acquiring at least one clock from the at least one bus; and    storing at least one value based on the at least one clock.    
   
   
       12 . The traffic observing method of  claim 11 , further comprising the steps of: 
 reading the at least one stored value; and    performing analysis based at least in part on the at least one value.