PRF(7) PRF(7) NAME prf - operating system profiler DESCRIPTION The special file /dev/prf provides access to activity information in the operating system. Writing the file loads the measurement facility with text addresses to be monitored. Reading the file returns these addresses and a set of counters indicative of activity between adjacent text addresses. The recording mechanism is driven by a separate profiling clock. The profiling clock period is set so that it does not become synchronized with the regular system clock. Samples that catch the operating system are matched against the stored text addresses and increment corresponding counters for later processing. The file /dev/prf is a pseudo-device with no associated hardware. FILES /dev/prf SEE ALSO profiler(1M). Page 1[top]
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