Very Computer

by **Andrew Berna** » Fri, 09 Jul 1999 04:00:00

I'm trying to port a program to AIX which relies on getting very detailed
CPU usage time from another process (it's a profiler). It's currently
running on a Solaris box, and we've been using the /proc filesystem
to get the times needed (with a PIOCUSAGE ioctl).

The box we're trying to port it to runs AIX 4.1, and does not have a
/proc filesystem. Can someone suggest an equivalent way of getting the
timing information?

Thank you very much,
Drew

--
Drew Bernat __ ____

by **Walsh Brow** » Fri, 09 Jul 1999 04:00:00

> I'm trying to port a program to AIX which relies on getting very
detailed
> CPU usage time from another process (it's a profiler). It's currently
> running on a Solaris box, and we've been using the /proc filesystem
> to get the times needed (with a PIOCUSAGE ioctl).

> The box we're trying to port it to runs AIX 4.1, and does not have a
> /proc filesystem. Can someone suggest an equivalent way of getting the
> timing information?

> Thank you very much,
> Drew

> --
> Drew Bernat __
____

|

|

Take a gander at the getprocs() subroutine. It is the routine to access
the process table in AIX (must be root to access all processes,
otherwise you only get access to your own). It reads each process into
a structure called procsinfo (procinfo.h) which contains the user
(pi_ru.ru_utime) and system (pi_ru.ru_stime) times that you are looking
for.

For more info, man getprocs.

-- Walsh

--
Walsh Brown

Sometimes I sit and think...sometimes I just sit.

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by **Andrew Berna** » Fri, 16 Jul 1999 04:00:00

>> I'm trying to port a program to AIX which relies on getting very
> detailed
>> CPU usage time from another process (it's a profiler). It's currently
>> running on a Solaris box, and we've been using the /proc filesystem
>> to get the times needed (with a PIOCUSAGE ioctl).

>> The box we're trying to port it to runs AIX 4.1, and does not have a
>> /proc filesystem. Can someone suggest an equivalent way of getting the
>> timing information?

>> Thank you very much,
>> Drew
> Take a gander at the getprocs() subroutine. It is the routine to access
> the process table in AIX (must be root to access all processes,
> otherwise you only get access to your own). It reads each process into
> a structure called procsinfo (procinfo.h) which contains the user
> (pi_ru.ru_utime) and system (pi_ru.ru_stime) times that you are looking
> for.
> For more info, man getprocs.

To answer my own question... :) getprocs() returns, among other things,
an rusage struct, which contains a timeval struct for user and system
time. At least on my system, it contains seconds and nanoseconds. However,
the resolution is only a hundredth of a second.

Thanks for all the help, everyone!

Drew

--
Drew Bernat __ ____

Very Computer

Getting user+sys time from other processes

Getting user+sys time from other processes

Getting user+sys time from other processes

Getting user+sys time from other processes