Data trace compression map

摘要

Trace data compression includes selectively transmitting data packets, data addresses and program counter addresses and transmitting which are transmitted in a data log header. Trace data compression further includes determining and not transmitting most significant bytes of data, data address or program counter address having bits that all equal the most significant bit. This requires an indication of the data, data address and program counter address length. Trace data compression further includes transmitting only bytes of data, data address and program counter address which differ from corresponding byte of the prior data, data address and program counter address together with a map indicating which bytes are transmitted.