Date: Thu, 16 Oct 1997 08:01:27 -0400 (EDT) From: Brian Clapper <bmc@WillsCreek.COM> To: questions@FreeBSD.ORG Subject: Re: time results : how compare ??? Message-ID: <199710161201.IAA00486@current.willscreek.com> In-Reply-To: <124810877@toto.iv>
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Gianmarco Giovannelli wrote:
> I have compiled world twice with different cpu... how can I interpret
> the time (builtin tcsh) results ?
>
> Pentium 233mmx
> 5338.408u 1121.528s 2:09:24.49 85.7% 796+935k 51920+12714io 11107pf+0w
>
> (Amd k6 233mmx)
> 4535.91u 1309.740s 1:55:47.44 1% 735+882k 52356+127852io 11103pf+0w
>
>
> I can say the second is faster than the first, but there are some
> strange values , i.e. the % value...
>
> What do this numbers say, else ?
Type `man tcsh'. RTFM.
Here are some relevant excerpts from the REFERENCE section.
In the `Builtin commands' subsection:
time [command]
Executes command (which must be a simple command, not an
alias, a pipeline, a command list or a parenthesized command
list) and prints a time summary as described under the time
variable. If necessary, an extra shell is created to print
the time statistic when the command completes. Without
command, prints a time summary for the current shell and its
children.
In the `Special shell variables' subsection:
time If set to a number, then the `time' builtin executes
automatically after each command which takes more than that
many CPU seconds. If there is a second word, it is used as
a format string for the output of the time builtin. (u) The
following sequences may be used in the format string:
%U The time the process spent in user mode in cpu seconds.
%S The time the process spent in kernel mode in cpu seconds.
%E The elapsed (wall clock) time in seconds.
%P The CPU percentage computed as (%U + %S) / %E.
%W Number of times the process was swapped.
%X The average amount in (shared) text space used in Kbytes.
%D The average amount in (unshared) data/stack space used
in Kbytes.
%K The total space used (%X + %D) in Kbytes.
%M The maximum memory the process had in use at any time in
Kbytes.
%F The number of major page faults (page needed to be
brought from disk).
%R The number of minor page faults.
%I The number of input operations.
%O The number of output operations.
%r The number of socket messages received.
%s The number of socket messages sent.
%k The number of signals received.
%w The number of voluntary context switches (waits).
%c The number of involuntary context switches.
Only the first four sequences are supported on systems
without BSD resource limit functions. The default time
format is `%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww' for
systems that support resource usage reporting and `%Uu %Ss
%E %P' for systems that do not.
-----
Brian Clapper, bmc@WillsCreek.COM, http://WWW.WillsCreek.COM/
Lowery's Law: If it jams, force it. If it breaks, it needed replacing anyway.
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