研讨会 LOG等调式模块的使用.pptVIP

DSP/BIOS 1 DSP/BIOS System Integration Workshop Objectives Stop-Based Debug Tools BIOS Realtime Instrumentation Data Visibility w/o Loss of Real-Time Statistics – STS Counting Event Occurences: STS_add Statistics – STS For the Average Value of a Variable Statistics – STS Statistical Maximum Register Usage... Track the maximum and average for a variable is the same API as obtaining the average value. The STS object maintains the max value separately in the ‘maximum’ register Tracking minimum value of a variable is the same as the maximum, except that “- value” (minus value) is specified: To monitor the difference between actual values and a desired value, the following can be used: Statistics – STS STS_set() and STS_delta() Timing events or monitoring incremental differences in a value Uses unsigned arithmetic for subtraction to prevent the problem when value “wraps” STS_set() could be placed early in an HWI and STS_delta() could be at the end of an SWI to measure total response time to an interrupt (min/max/average) STS _set() and _delta() can also be used to monitor growth in a data value between two points in code STS API Statistics Accumulators Objects Initial value (32 bit) Format used to display the data from object Filter Operation Values for A, B, C Setting Up an STS Object HWI Monitor Option – STS Collection Viewing the Count Value via CCS BIOS Realtime Instrumentation Why not use printf()? How does LOG_printf solve this problem? How are the various LOG API used? printf() LOG_printf() printf() vs. LOG_printf() LOG_printf() and LOG_event() Log Buffer Details Other LOG API LOG API Review LOG Setup Via GCONF and TCONF Setup Message Logging BIOS Implicit Instrumentation How can instrumentation be disabled during critical periods? How can it be re-enabled when desired? Can instrumentation be managed by host (CCS)? By target (BIOS API)? Can trace options be observed and managed by host or target to determine if instrumentation is sent? Host (CCS) Trace Co