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Annotation of researchv10dc/man/adm/man1/time.1, revision 1.1.1.1

1.1       root        1: .TH TIME 1
                      2: .CT 1 proc_man time_man debug_tune
                      3: .SH NAME
                      4: time \- time a command
                      5: .SH SYNOPSIS
                      6: .B time
                      7: [
                      8: .B -usrtdmfio
                      9: ]
                     10: [
                     11: .B -v
                     12: ]
                     13: .I command
                     14: .SH DESCRIPTION
                     15: The
                     16: given command is executed; after it is complete,
                     17: .I time
                     18: reports statistics about the program on its standard error output.
                     19: The statistics printed are controlled by the option string;
                     20: the default is
                     21: .BR -usr ;
                     22: .B -v
                     23: reports everything.
                     24: The statistics are:
                     25: .TP
                     26: .B u
                     27: User cpu time consumed by the command
                     28: .TP
                     29: .B s
                     30: System cpu time attributed to the command
                     31: .TP
                     32: .B r
                     33: Real (clock) time taken by the command
                     34: .TP
                     35: .B t
                     36: Average resident text size, in Kb.
                     37: .TP
                     38: .B d
                     39: Average resident data size, in Kb.
                     40: .TP
                     41: .B m
                     42: Maximum total resident size, in Kb.
                     43: .TP
                     44: .B f
                     45: Number of page faults resulting in disk I/O.
                     46: .TP
                     47: .B i
                     48: Number of disk blocks read.
                     49: .TP
                     50: .B o
                     51: Number of disk blocks written.
                     52: .PP
                     53: After the statistics,
                     54: .I time
                     55: prints a tab and the command, up to the fifth argument.
                     56: Times are reported in seconds.
                     57: The numbers are the sum of those for
                     58: .I command
                     59: and any children it spawns and waits for.
                     60: .SH "SEE ALSO"
                     61: .IR lcomp (1),
                     62: .IR prof (1)
                     63: .SH BUGS
                     64: Elapsed time is accurate to the second,
                     65: while the CPU times are measured
                     66: to 1/60 second.
                     67: Thus the sum of the CPU times can be up to a second larger
                     68: than the elapsed time.

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