info-vax (07/28/82)
>From PAO@MIT-EECS Wed Jul 28 09:25:55 1982
Under VMS, I need to find out how much time (wall and CPU) is spent by
a driver in processing a particular processes I/O requests. Failing
that, is there any way to find out all the time spent by a particular
driver?
- Patinfo-vax (07/28/82)
>From PAO@MIT-EECS Wed Jul 28 12:07:23 1982
Date: Wednesday, 28 July 1982 14:00-EDT
From: DP at MIT-ML
Re: time information
DP@MIT-ML 07/28/82 14:00:36 Re: time information
To: PAO at MIT-MC
well if you dig into the archives of info-vax you will find
a routine to read the system clocks....
Jeff
Thanks for the info, but I'm new on info-vax. Could someone tell me
where to find the archives?
- Patinfo-vax (07/28/82)
>From PAO@MIT-EECS Wed Jul 28 14:51:11 1982
My original question was whether VMS kept any (accounting) data on how
much time was spent in the I/O drivers. I am basically interested in
comparing the CPU load between two similar controllers. I could
modify the drivers to read the various system clocks and keep track of
the time themselves, but I'd rather not, especially if the information
is already available.
- Patinfo-vax (07/29/82)
>From DP@MIT-ML Wed Jul 28 19:37:46 1982
Vms keeps no accounting data on itself. A user is charged a fixed
(and tuneable, one of the /special parameters of sysgen) amount of time
for performing an I/O. This number has only slight bearing on reality.
basicly if you want timings, you are going to have to take them yourself...
Jeff