off– Turn off clock-based profiling.
on– Turn on clock-based profiling with the default profiling interval of approximately 10 milliseconds.
lo[w]– Turn on clock-based profiling with the low-resolution profiling interval of approximately 100 milliseconds.
hi[gh]– Turn on clock-based profiling with the high-resolution profiling interval of approximately 1 millisecond. See Limitations on Clock-Based Profiling for information on enabling high-resolution profiling.
[+]value– Turn on clock-based profiling and set the profiling interval to value. The default units for value are milliseconds. You can specify value as an integer or a floating-point number. The numeric value can optionally be followed by the suffix m to select millisecond units or u to select microsecond units. The value should be a multiple of the clock resolution. If it is larger but not a multiple it is rounded down. If it is smaller, a warning message is printed and it is set to the clock resolution.
On SPARC platforms, any value may be prepended with a + sign to enable clock-based dataspace profiling, as is done for hardware counter profiling.
Collecting clock-based profiling data is the default action of the collect command.