INFORMATION ABOUT THE time AND w COMMANDS


The following is part of the documentation of the time command
built into csh, the shell we are using on the irises.  It
explains the information you get when you time a program.

               %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 operations.
               %K   Average amount of unshared stack space used in Kilobytes.
               %M   Maximum real memory used during execution of the process
                    in Kilobytes.
               %O   Number of block output operations.
               %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.

               Note that the values for %D, %K, and %X always print as zero
               since the IRIX kernel does not maintain the getrusage(3)
               counters required to calculate them.


The following is the output I got on iris12 when I ran my fork
program:

iris12% time fork 10000
1.3u 17.3s 0:24 76% 0+0k 19+0io 13pf+0w

iris12% w
 11:40am  up 19 days,  3:44,  6 users,  load average: 2.90, 2.39, 2.26
User     tty from            login@   idle   JCPU   PCPU  what
downey   q0  node-013.offic Mon 5pm          1:16         w 
a_dorigo q1  iris14         20Feb98  7days     12         -csh 
CC       q3  iris6           9:07am            12         -csh 


This is the same result I got last night when I ran the same program
on a nearly idle machine.