drich@klaatu.lanl.gov (David Rich) (02/23/90)
I've not run across a reasonable description of the output of the time command in unix doc that I've seen. What do these numbers mean? In general, what do they say about an application? e.g., 46.6u 1.8s 0:50 96% 0+1716k 5+0io 13pf+0w Dave (dor@lanl.gov) -- David Rich Military Systems Analysis Group (A-5) MS F602 Los Alamos National Laboratory Los Alamos, NM 87545 Phone: (505) 665-0726 Email: dor@lanl.gov
yahoo@unix.cis.pitt.edu (Kenneth L Moore) (04/13/90)
In article <3556@zorba.Tynan.COM> drich@klaatu.lanl.gov (David Rich) writes:
=>I've not run across a reasonable description of
=>the output of the time command in unix doc that
=>I've seen. What do these numbers mean? In general,
=>what do they say about an application?
=>
=>e.g., 46.6u 1.8s 0:50 96% 0+1716k 5+0io 13pf+0w
=>
=>Dave (dor@lanl.gov)
=>--
=>David Rich
=>Military Systems Analysis Group (A-5)
=>MS F602
=>Los Alamos National Laboratory
=>Los Alamos, NM 87545
=>
=>Phone: (505) 665-0726
=>Email: dor@lanl.gov
Funny you should post this... Just today I tried to track down an
explaination. The man on time says see man csh and the csh man
tells you nothing.
I would like to know the answer, too.
--
I don't yell and I don't tell and I'm grateful as hell: Benny Hillleland@cs.columbia.edu (Lee Woodbury) (04/13/90)
In article <3556@zorba.Tynan.COM> drich@klaatu.lanl.gov (David Rich) writes: >I've not run across a reasonable description of >the output of the time command in unix doc that >I've seen. What do these numbers mean? In general, >what do they say about an application? > >e.g., 46.6u 1.8s 0:50 96% 0+1716k 5+0io 13pf+0w The 'time' command is part of the shell (in your case, the csh; the sh's and ksh's time has a different output format). The csh(1) man page provides explication of the above format, but to summarize, the above example indicates: tag # unit description ----- ---- ---------- -------------------------------------------- %U 46.6 seconds CPU time devoted to the user's process. %S 1.8 seconds CPU time consumed by the kernel on behalf of of the user's process. %E 50 seconds Elapsed (wallclock) time for the command. %P 96 percent ( %U + %S ) / %E expressed as a percentage. %X 0 Kb Average amount of shared memory used. %D 1716 Kb Average amount of unshared data space used. %I 5 - Number of block input operations. %O 0 - Number of block ouput operations. %F 13 - Number of page faults. %W 0 - Number of swaps. Leland Woodbury -- ARPANET/INTERNET: leland@cs.columbia.edu USENET: ...!columbia!cs.columbia.edu!leland BITNET: leland%cs.columbia.edu@cuvmb USMAIL: Columbia Univ., 457 CS, 500 W. 120 St., NYC 10027-6699
guy@auspex.UUCP (Guy Harris) (07/04/90)
>>>I've not run across a reasonable description of >>>the output of the time command in unix doc that >>>I've seen. What do these numbers mean? In general, >>>what do they say about an application? >>> >>>e.g., 46.6u 1.8s 0:50 96% 0+1716k 5+0io 13pf+0w >> >>I would like to know the answer, too. > >The ``time'' shell builtin typically returns the contents of the tms >structure. Hrrumph. The *Bourne* shell "time" shell builtin typically returns the contents of the "tms" structure. The *C* shell "time" builtin, which is what his output looks like, selects various bits from the "struct rusage" structure (what, you don't have such a structure on your system? Not all UNIXes necessarily look exactly like yours...). Here's a description from the SunOS 4.0.3 C shell manual page. This describes the format of the "time" shell variable, which controls the output format of the "time" command: time Control automatic timing of commands. Can be supplied with one or two values. The first is the reporting threshold in CPU seconds. The second is a string of tags and text indicating which resources to report on. A tag is a percent sign (%) followed by a single upper-case letter (unrecognized tags print as text): %D Average amount of unshared data space used in Kilobytes. %E Elapsed (wallclock) time for the command. %F Page faults. %I Number of block input opera- tions. %K Average amount of unshared stack space used in Kilobytes. %M Maximum real memory used during execution of the process. %O Number of block output opera- tions. %P Total CPU time - U (user) plus S (system) - as a percentage of E (elapsed) time. %S Number of seconds of CPU time consumed by the kernel on behalf of the user's process. %U Number of seconds of CPU time devoted to the user's process. %W Number of swaps. %X Average amount of shared memory used in Kilobytes. The default summary display outputs from the %U, %S, %E, %P, %X, %D, %I, %O, %F and %W tags, in that order.