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time (Unix) - can be used to determine the run time of a program, separately counting user time vs. system time, and CPU time vs. clock time. [1] timem (Unix) - can be used to determine the wall-clock time, CPU time, and CPU utilization similar to time (Unix) but supports numerous extensions.
In computers, hardware performance counters (HPC), [1] or hardware counters are a set of special-purpose registers built into modern microprocessors to store the counts of hardware-related activities within computer systems. Advanced users often rely on those counters to conduct low-level performance analysis or tuning.
Counter multiplexing and overflow handling are also supported. Operating system support for accessing hardware counters is needed to use PAPI. For example, prior to 2010, a Linux/x86 kernel had to be patched with a performance monitoring counters driver (perfctr link) to support PAPI. Since Linux version 2.6.32, and PAPI 2010 releases, PAPI can ...
perf is used with several subcommands: stat: measure total event count for single program or for system for some time; top: top-like dynamic view of hottest functions; record: measure and save sampling data for single program [13] report: analyze file generated by perf record; can generate flat, or graph profile. [13] annotate: annotate sources ...
Provider Count is the number of providers registered with the Windows Filtering Platform. Windows Time Service Windows Time Service Performance Counters display the time synchronization runtime information from the service. Note that the service has to be running in order for this information to be displayed.
A record-breaking, 19-foot-long Burmese python was caught this week in Florida. The Conservancy of Southwest Florida said the snake was caught by a local hunter in the Big Cypress National ...
As performance is part of the specification of a program – a program that is unusably slow is not fit for purpose: a video game with 60 Hz (frames-per-second) is acceptable, but 6 frames-per-second is unacceptably choppy – performance is a consideration from the start, to ensure that the system is able to deliver sufficient performance, and ...
The Time Stamp Counter (TSC) is a 64-bit register present on all x86 processors since the Pentium. It counts the number of CPU cycles since its reset. The instruction RDTSC returns the TSC in EDX:EAX. In x86-64 mode, RDTSC also clears the upper 32 bits of RAX and RDX. Its opcode is 0F 31. [1]