system.time
On Mon, 23 Jul 2001, Agustin Lobo wrote:
The manual entry for system.time refers to "user, system, and total elapsed times for the currently running R process". Is user time the time spent by the process itself and system time the time spent on other system activities?
These are reported by your (presumably Unix?) system. Most likely both
times are spent by the R process, the `user' time in the user code space,
and the `system' time in kernel calls.
Look up the times system call on your system for the exact details.
For example, Solaris says
The tms_utime member is the CPU time used while executing
instructions in the user space of the calling process.
The tms_stime member is the CPU time used by the system on
behalf of the calling process.
On Unix-alikes, system.time calls proc.time whose C code calls times.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._