Timing Metrics

Timing metrics are calculated from clock-based profiling data. The following table lists the metrics and their definitions.

Metric Definition
User CPU time LWP time spent running in user mode on the CPU.
Wall time LWP time spent in LWP 1. This is the "wall clock time"
Total LWP time Sum of all LWP times.
System CPU time LWP time spent running in kernel mode on the CPU or in a trap state.
Wait CPU time LWP time spent waiting for a CPU.
User lock time LWP time spent waiting for a user lock.
Text page fault time LWP time spent waiting for a text page.
Data page fault time LWP time spent waiting for a data page.
Other wait time LWP time spent waiting for a kernel page, or time spent sleeping or stopped.

Except for wall clock time, all metrics are summed across LWPs. Wall time as defined here is meaningless for multiple-program multiple-data (MPMD) programs.

See also
Hardware Counter Metrics
Thread Synchronization Delay Metrics
Memory Allocation Metrics
MPI Tracing Metrics
Exclusive, Inclusive, and Attributed Metrics
Setting Data Presentation Preferences

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