5.3 Documentation addenda

5.3.2 The backtrace logging facility

In the printed representation of the structure, each node is preceded by a number that represents its level in the call tree, where the root function is at level 1; the depth of the call tree is the maximum level reached. Each node is followed by a number that represents the percentage of total execution time spent in that function.

The call tree includes calls to system-support and internal functions that implement the code being traced. You cannot modify the performance of these functions. You can use the information in the call tree to determine how the program spends its execution time.

You should examine any function whose execution-time percentage is significantly higher than any of its leaves. You should monitor such functions more carefully by using the facility described in the section "The Performance Monitor."

The following functions control the Backtrace Logging Facility:

start-backtrace-logging
stop-backtrace-logging
summarize-backtrace-logging

5.3.2.1 - Using the Backtrace Logging Facility

5.3.2.2 - Dynamic closures and the backtrace logging facility

5.3.2.3 - Backtrace logging functions

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