Re: bug with for and time

[Peter Stephenson <pws@xxxxxxx>]

Dan Nelson wrote:
> In the last episode (Oct 06), Peter Stephenson said:
> > This has never been great.  There appear to be two problems.
> 
> Actually it _was_ great back in zsh 2.5, which did use getrusage().  It
> was dropped in zsh 3.0 for some reason.  My TIMEFMT is still set to
> "U:%U S:%S E:%E CPU:%P Faults:%F Swaps:%W" as a reminder to put it back
> in (not a very effective reminder I guess).

I can vaguely remember that the getrusage() fields which didn't
correspond to times were dropped when we switched to autoconf, simply
because it became hard to test for all the fields.  I didn't notice
getrusage() disappearing entirely then, but it certainly must have at
some point.

I suppose this will give us a base for putting them back, with suitable
configuration tests.  Here's what we're aiming at (from 2.5.03):

TIMEFMT
       The format of process time reports with the time keyword.
       The default is "%E real  %U  user   %S  system   %P  %J".
       Recognizes the following escape sequences:

        %U     CPU seconds spent in user mode.
        %S     CPU seconds spent in kernel mode.
        %E     Elapsed 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     Number of voluntary context switches (waits).
        %c     Number of involuntary context switches.
        %J     The name of this job.

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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